bluuebunny/crossref_metadata_2025 huggingface dataset:
Stability of Bilocal Relationships – Conditions and Development Paths An Analysis of the First and Second Wave of Pairfam
Authors: Dorbritz Jürgen , Naderi Robert
Published: November 2020

Bilocal relationships have lost their status as an exclusive living arrangement. They occur almost as frequently as unmarried cohabiting couples and can be found in virtually all social groups. Nevertheless, they are characterised by a set of very specific traits. The causes behind the increasing number of bilocal relationships can on the one hand be seen in a tendency towards greater individualisation, i.e. the desire for greater individual autonomy, and on the other hand in increasing demands for work-related mobility, which can only be met by separate households.

It is generally assumed that one defining characteristic of bilocal relationships is that they are rather short-lived and often merely seen as a temporary or stopgap solution. On the basis of the first and second wave of the pairfam survey, the aim of this paper is to investigate the general circumstances of bilocal relationships and its implications for their future stability. The central question is which conditions lead to the continuation or the breakup of a bilocal relationship or to an eventual shared household.

When looking at wave one and wave two in comparison (i.e. a time period of one year), profound changes have already occurred regarding continuation or breakup. From those bilocal relationships found in wave one, more than half of the age-group questioned had not changed their chosen relationship type. The smaller portion of respondents had separated and thus ended bilocality (just over 10 %). The remaining bilocal relationships had increased their level of institutionalisation by becoming spouses or cohabitants. As regarding the development from wave one to wave two, it becomes apparent through the results of a multivariate analysis that the general circumstances of older respondents should be judged differently than those of younger ones. The work-related constellation between the two partners, spatial proximity, educational homogamy, previous experience in cohabitating and intentions in regard to separation or moving in together are explaining factors for the continuation of a bilocal relationship, the set-up of a shared household or a breakup.
Scenarios for the Equal Division of Paid and Unpaid Work in the Transition to Parenthood in Germany
Authors: Dechant Anna , Schulz Florian
Published: November 2020

On the basis of a qualitative longitudinal study of 14 German couples, the conditions that are necessary and sufficient for an equal division of labour in the transition to parenthood are examined in an explorative way. Based on the assumption that couples with educational homogamy on a high level are probably more prone and sufficiently assertive to establish egalitarian relationships, we show that such arrangements cannot be sustained or achieved without the existence of specific contiguous conditions. A comparison of attitudes, family values and norms with actual everyday routines also suggests in many cases the well-known “verbal open-mindedness and rigid behaviour”.
Job-Related Circular Mobility and the Quality of Intimate Relationships
Authors: Feldhaus Michael , Schlegel Monika
Published: November 2020

This paper addresses the influence of different types of spatial mobility on relationship quality. Although some studies have been carried out on this question, the existing empirical results remain contradictory. The paper tries to overcome some of these limitations by analysing to what extent mobility demands show direct as well as indirect effects. Spatial mobility could have impacts on crucial aspects of relationship dynamics, which are theoretically and empirically identified as significant for relationship satisfaction. The mediating variables used therefore include relatedness, autonomy, conflict and the perceived fairness with regard to the division of labour. The data support the stress hypothesis which assumes that job-related mobility has a negative effect on the relationship quality, but only for women and mothers. There are actually positive effects for men. In terms of indirect effects, the results show that spatial mobility does neither reduce relatedness in relationships nor increase conflict behaviour significantly. In fact, the opposite effect seems to come to play: There is empirical evidence, especially for women, that more demanding mobility increases the feeling of autonomy within a relationship. It also increases relatedness and reduces perceived conflicts, this in turn having a positive effect on relationship quality.
Changes in Employed People’s Health Satisfaction
Authors: Jungbauer-Gans Monika , Krug Gerhard
Published: November 2020

The article examines for Germany whether the subjective satisfaction with health has changed over the course of time. It is analysed whether a drop in health satisfaction can be observed and whether this can be explained by changing employment circumstances. Labour market research has documented a change in the employment situation in detail, which can be subsumed under the keyword of precarisation. In the theoretical section we will portray the current state of research concerning the development of the employment situation and emphasize the significance of gainful employment for health. The empirical analyses of the article are based on data of employed people in the German Socio-Economic Panel Study (SOEP) of the years 1985, 1996 and 2009. The data show a significantly declining health satisfaction between 1985 and 2009 in Western Germany and no noteworthy change in Eastern Germany between 1996 and 2009. The Blinder/Oaxaca decomposition is used in the analyses to better differentiate the effect of the changed employment situation on the drop in health satisfaction. The analyses indeed reveal changing effects of the employment situation. In Western Germany, a significant percentage of the lesser health satisfaction can be attributed to an increasing number of workers in precarious employment situations. Workplace security is of primary significance for explaining the declining health satisfaction in Western Germany.
Unhealthy Conditions? A Longitudinal Analysis of the Health of Children in One- and Two-parent Households
Authors: Brockmann Hilke
Published: November 2020

Families produce health, but changes in familial structures are made responsible for many negative health trends in the population. How does the health of younger children today in Germany develop when comparing whether the parents live together or separately? Using data from the German Socio-Economic Panel Study (SOEP), we are able to show that children in traditional marriages are not generally healthier than children in other families. For example, the risk of suffering health problems is even significantly lower among younger children of single mothers than among children of married mothers. Nevertheless, children of married mothers have a higher birth weight and a body mass index (BMI) that deviates less from the norm than the children of divorced mothers. Longitudinally and under control of possible selection effects, there is evidence that the separation and divorce of parents has negative health effects. Especially the mental and intellectual state of the mother, rather than her material situation, can help to cushion the negative consequences of a separation on her children’s health. Against the background of increasing numbers of single mothers, we will discuss the current and future significance of these findings.
Economisation of the Education System in Shrinking Regions? The Demographic Responsiveness of Education Demand and Supply at Different Levels of the Education System
Authors: Bartl Walter
Published: November 2020

Will foreseeable demographic change lead to savings in the education sector? This question is investigated in a retrospective perspective based on data from Saxony-Anhalt, the German state with the largest population decline since reunification. Results show that we can observe economisation strategies in the face of lower cohort sizes in most subsectors of the education system. These strategies are, however, not always (directly) attributable to demographic decline. Moreover, there is considerable variation in the demographic responsiveness of education demand and supply. Important intervening factors in this respect are several dimensions of educational governance and the economic conditions in a given region.
Prospects for West German Post-War Single-Family Home Neighbourhoods
Revitalising Housing Stocks as a New Policy Field for Suburban and Rural Municipalities

Authors: Zakrzewski Philipp , Berndgen-Kaiser Andrea , Fox-Kämper Runrid , Siedentop Stefan
Published: November 2020

The single-family home neighbourhoods that were built in West Germany in the 1950s, 1960s and 1970s will be increasingly affected by future socio-demographic changes. Today, the above-average length of occupancy by owners and the rise in life expectancy are leading to the increased over-ageing of the populations in these residential areas. The generational change means that a constantly growing number of these homes are being put up for sale and encountering a changing and regionally differentiated housing market. Regionally diverse shrinking and ageing of the population will decrease the potential demand for single-family homes in coming years. In addition, social change will lead to qualitative changes in demand. The pluralisation of living arrangements and residential preferences can be expressed in the changed household structures and the geographic shift in housing demand in favour of more dense urban areas. Therefore, residential areas in peripheral regions with unfavourable demographic and economic conditions are particularly at risk. At the local level, winners and losers will emerge among the existing residential neighbourhoods of suburban or rural municipalities. Disadvantages such as unfavourable characteristics of a certain location and construction or energy efficiency shortcomings, as well as image perception, can combine to create serious problems. In the worst case, homes are at risk of a loss in value, neglect, vacancy and dilapidation – developments that have, to date, been largely unknown in Germany’s single-family home sector. The question for areas with at-risk homes is how the looming change in owner generations, not to mention the structural and infrastructural transformation processes, can be managed. This article, based on the results of a research project conducted by the Wüstenrot Foundation, examines the general demographic and socio-economic causes of this development and characterises the present situation in selected case studies. We also address questions about handling these problems and identify initial considerations about possible municipal interventions in the revitalisation of single-family home neighbourhoods. In addition, the article presents a strategic framework for action and a number of possible municipal provisions.
Son Preference in India: Shedding Light on the North-South Gradient
Authors: Klaus Daniela , Tipandjan Arun
Published: November 2020

Son preference is widespread in India and deep-rooted in its history. It is a matter of concern because it produces an imbalanced juvenile sex ratio. There are far fewer girls than boys. The figures vary greatly among the Indian states suggesting a major north-south gradient in son preference accompanied by a minor west-east gradient. The aim of this paper is to explain the regional pattern. We provide an application of the value of children-approach according to which the decision to have children is made on the calculus of benefits and costs related to children. In the light of the socioeconomic and sociocultural background in India, we propose that (potential) parents’ expectations of benefits and costs are biased in favour of sons. This is suggested, therefore, as the key motivation for the preference for male offspring. However, region-specifics in the level of affluence, the educational level, the mode of production, the meaning and importance of religion, and the kinship regime are assumed to produce stronger son preference in north India compared to south India. This mediation-model is tested using the Indian sub-sample of the international Value of Children-study. Data were collected in Uttar Pradesh (north-central India) and Puducherry (south-east India). Mothers aged 16 to 65 were interviewed in 2002 and 2010. Based on 1,173 respondents, a structural equation model was carried out to test the hypothesised composition effects related to the region and the mediating position of sex-specific benefits and costs. Initial findings confirm that the national son preference pattern is more likely to be found among north Indian mothers than south Indian mothers. As assumed, the sex-specific balance of benefits and costs contributes to the explanation of son preference. However, there is little evidence that the benefits and costs mediate between the region-specific socioeconomic and sociocultural profiles and son preference. Son preference is most pronounced among mothers of the north-urban sample after controlling for region-specific distributions of socioeconomic and sociocultural background variables. Variations in son preference across the regional sub-samples are partly explained by the respective background variables and the benefit and cost-structure. But independent regional effects continue to be significant and thus, a considerable part of the north-south gradient remains unclear.
Social Differences in Infant Mortality in 19th Century Rostock. A Demographic Analysis Based on Church Records
Authors: Mühlichen Michael , Scholz Rembrandt D. , Doblhammer Gabriele
Published: November 2020

The article examines the historical development of infant mortality in the Hanseatic city of Rostock, with a special focus on the question of how socio-economic factors influenced infant mortality in the early 19th century. Compared with the rest of Germany, the city exhibited an exceedingly low infant mortality level, in particular in the first third of the century. Our analyses show that the occupation of the father had a significant influence on the survival probability of a child in the first year of life in the early 19th century. Newborn children of fathers in lower ranked occupations exhibited a greater mortality risk in the first year of life than the offspring of fathers with occupations of higher status. The analyses are based on the registries of burials and baptisms of St. James’s Church (Jakobikirche) in Rostock, which are largely preserved and much of which has been digitalised. Based on these individual data, this is the first event history analysis model conducted in the context of infant mortality in a German city in the 19th century. This article is also the first to reveal Rostock infant mortality rates for the entire 19th century according to sex, thus closing two research gaps.
Living Arrangements of Young Adults in Europe
Authors: Schwanitz Katrin , Mulder Clara H.
Published: November 2020

Comparative research suggests that there are great cross-national and cross-temporal differences in living arrangements of young adults aged 18-34 in Europe. In this paper, we examine young adults’ living arrangements (1) across several European countries and different national contexts, and (2) by taking into account cross-time variability. In doing so, we pay careful attention to a comprehensive conceptualisation of living arrangements (including extended and non-family living arrangements). The aim of this paper is to deepen our understanding of family structure and household arrangements in Europe by examining and mapping the cross-national and cross-temporal variety of young adults’ living arrangements. For our analysis we use data from the Integrated Public Use Microdata Series International (IPUMSi) for the census rounds 1980, 1990, and 2000 for eight European countries (Austria, France, Greece, Hungary, Ireland, Portugal, Romania, and Switzerland). We employ log-linear models to ascertain the influence of individual and contextual factors on living arrangements. The analyses lend further support to a North/West – South/East divide in living arrangements and general gender differentials in extended family living. Other interesting results are the heterogeneity in the living arrangements of single mothers across geographic areas, and the upward trend of extended household living for young men and women between 1980 and 2000.
Life Expectancy by Education, Income and Occupation in Germany: Estimations Using the Longitudinal Survival Method
Authors: Luy Marc , Wegner-Siegmundt Christian , Wiedemann Angela , Spijker Jeroen
Published: November 2020

Reliable estimates for differences in life expectancy (LE) by socio-economic position (SEP), that can be assessed in an international context and are comprehensive in terms of considering different SEP dimensions, are missing for the German population so far. The aim of the present study is to fill this gap by providing estimates for differences in LE by education, household income, work status and vocational class. The lack of national mortality data by SEP required an innovative methodological approach to estimate LE from survey data with a mortality follow-up. The main strengths of the method are the low demand on the data, its simple applicability and the estimation of a set of age-specific probabilities of dying. We employed the method to the German Life Expectancy Survey and estimated period life tables for 45 male and 32 female SEP subpopulations. The results show striking differences in LE across all analysed SEP indicators. Among men, LE at age 40 ranges by more than five years between the lowest and highest household income quartiles, more than six years between individuals with low and high education, around ten years across the work status groups, and almost 15 years across the vocational classes. The proportion of those who reach the classic pension age of 65 years also varies considerably, as does the remaining LE at this age. The corresponding differences among women are smaller, yet still notable. The results yield an interesting finding for the ongoing discussion about the various consequences of an increased pension age. Moreover, they provide policy-makers, doctors, researchers and public health workers with insights into Germany’s most disadvantaged SEP subpopulations and the potential extent of their disadvantages in terms of longevity and mortality.
International Variation in Ageing and Economic Dependency: A Cohort Perspective
Authors: Loichinger Elke , Skirbekk Vegard
Published: November 2020

Within this analysis of demographic and economic dependency ratios for 45 countries around the world, we reiterate the importance of age- and gender-specific employment levels as well as their determinants when discussing the economic challenges associated with population ageing. Building upon existing research on economic dependency, we portray and discuss cohort variation in employment and its possible effect on the challenges of population ageing, focusing on the implications of high youth unemployment, the role of changes in female employment and the evolution of retirement patterns across cohorts. The insights from our analysis reaffirm findings elsewhere that younger populations may not be as well off in the light of demographic change as an analysis of their demographic structure alone would suggest and stress the importance of considering the cohort dimension of employment in this discussion.
Impact of Regional Factors on Cohort Fertility: New Estimations at the District Level in Germany
Authors: Bujard Martin , Scheller Melanie
Published: November 2020

Incorporating the regional context into fertility research has a long standing tradition. However, in Germany, fertility data at the district level only exist for period total fertility rates (TFR), but not for cohort total fertility rates (CTFR). Based on the 2011 census and birth statistics, we estimate the CTFR at the district level and analyse factors influencing their variation.First, we estimate the CTFR for the 1969-72 cohorts in all 402 German districts. The estimated CTFR differ strongly across German districts ranging between 1.05 and 2.01. Further, the estimated CTFR differ substantially from the known TFR values. This is mainly due to biases in the tempo component of the TFR, which are crucial in East German districts, university cities and in urban-rural comparisons. Therefore, the estimated CTFR allow for a better assessment of fertility differences across districts.Second, we analyse the differences in the newly estimated CTFR employing regression models. Composition effects such as a low proportion of highly educated women, a high share of Catholics or immigrants are significantly associated with higher CTFR in West German districts. However, regional opportunities are also important: A low population density, the availability of relatively spacious dwellings, a surplus of males, a small service sector and low unemployment rates are associated with higher fertility. Overall the analyses show regional factors are highly relevant for fertility.
Attitudes toward Abortion for Medical and Non-medical Reasons among the Turkish Second Generation in Europe – The Role of the Family and Societal Contexts
Authors: Milewski Nadja , Carol Sarah
Published: November 2020

This paper studies attitudes toward abortion among the second generation of Turkish migrants and their native counterparts in six western and northern European countries. We focus on Turkish migrants because they not only constitute one of the largest immigrant groups, but are also hypothesised to be culturally and demographically very distinctive from the native group. We used data from the project on “The Integration of the European Second Generation (TIES 2007-08)” from Austria, France, Germany, the Netherlands, Sweden and Switzerland. The sample consisted of 4,761 respondents aged 18 to 35, 49.5 percent of whom were children of Turkish migrants born in Europe and 51.5 percent belonged to the respective non-migrant comparison groups. Unlike in other surveys, the question regarding attitudes toward abortion in the TIES questionnaire distinguished between “medical” and “non-medical” reasons for abortion, with the possible answers being “never”, “in specific cases” and “always”. We carried out multinomial logistic regression analyses and investigated three research questions: 1) Departing from assimilation theory, we examined whether the attitudes of migrant descendants differed from those of their non-migrant counterparts. Our results show that both groupings under study expressed a range of attitudes, and that abortion for medical reasons was more accepted than abortion for non-medical reasons. However, second-generation Turks were more likely than the natives to say that they would never accept abortion. 2) We investigated the extent to which the societal climate and the integration context of the respondents influenced their attitudes toward abortion, while assuming that we would find cross-country variation in these attitudes. Our results reveal that among natives, levels of acceptance of abortion are lowest in Germany and highest in Sweden and France. We found a similar country pattern for women and men of the second Turkish generation. 3) We explored the degree to which the respondents’ family contexts (childhood backgrounds as well as current socio-demographic variables) influenced their attitudes toward abortion. While these factors partially explained the variation within the Turkish second generation and within the native comparison group, the country differences remained significant. We conclude that attitudes toward abortion in the Turkish second generation are influenced by their family backgrounds, but also by their socialization experiences in European receiving countries. These findings suggest that cultural assimilation processes are occurring, but not to the point where the attitudes of migrant descendants have converged with the attitudes of natives in the respective destination country. * This article belongs to a special issue on migrant fertility.
Remittance Behaviour of Intra-EU Migrants – Evidence from Hungary
Authors: Kajdi László , Ligeti Anna Sára
Published: November 2020

After the eastern expansion of the European Union (EU), a large number of emigrants left their home countries to work in economically better developed western member states. Hungary followed this EU emigration trend with a certain time lag. However, the rising number of emigrants caused structural problems in the domestic labour market. A comprehensive examination of intra-EU remittances as one of the major determinants of migration has been outside the scope of recent research activity. The data from the Hungarian Microcensus survey and the first Hungarian household survey focusing on the topic of remittances can provide a valuable case study of intra-EU private transfer flows.

The aims of this study are twofold. On the one hand we intend to provide empirical evidence for the major factors that determine remittance propensity by calculating probit regressions. On the other hand, OLS regressions are calculated in order to introduce variables which are associated with money transfers. These results are interpreted within the theoretical framework of the New Economics of Labour Migration (NELM) to identify the underlying motivations for remittances. The most important findings are that older men with vocational school education have the highest remittance propensity, and the likelihood of sending private support is higher among short-term migrants. As the key factors, the income of the sender person is positively associated with the sum of money flows, while the income of the receiving household is negatively associated. Within the theoretical framework of NELM, these results favour the dominance of altruistic motives, since supporting the household members who remain behind seems to be the major driving force. However, when intentions of returning home are considered in the models, it seems that self-interest might also play a role as a driver of remittances. Within this study, the main focus was on the characteristics of the senders, meaning that a possible field of future research could be an examination of these questions from the perspective of remittance receiver households.
From Living Apart to Living Together: Do Children Born before the Current Partnership Matter?
Authors: Van der Wiel Roselinde , Mulder Clara H. , De Valk Helga A.G.
Published: November 2020

This study examines the association between having children born before the current partnership and women’s and men’s likelihood of transitioning from living apart together (LAT) to co-residing. LAT partnerships are common among individuals with pre-partnership children, but have so far been under-researched. Our study not only focuses on those in LAT relations, but also takes the different pathways to becoming a single parent into account. Event-history analysis was performed using waves 1-4 from the Netherlands Kinship Panel Study.

The results indicate that separated and widowed mothers were less likely to transition to co-residence with their LAT partner than childless women who had previously been in a co-residential union. Mothers who had previous out-of-union children were found to be even less likely to enter co-residence. Results were mostly similar for men and women. The only exception was the effect of being widowed with children; for men this resulted in higher chances of transitioning to co-residence with a new partner whereas for women the chances were lower.

The findings suggest that individuals’ parenthood and union histories are associated with the development of their later partnerships, and that these patterns vary by gender. Given contemporary and future patterns of partnership separation, our study provides insights for better understanding how LAT relations develop for different sub-populations.
Recognition and management of sepsis: the nurse's role
Authors: Bleakley Greg , Cole Mark
Published: November 2020

Caring for a patient with suspected sepsis is a challenging nursing role. Early recognition and appropriate management of a patient with sepsis saves lives. Nurses play a fundamental role in detecting changes in physiological observations that could indicate the onset of sepsis. Additionally, an awareness of the pathophysiology of sepsis allows the nurse to better understand how rapid intervention prevents the onset of septic shock. Furthermore, knowledge and use of clinical guidelines and sepsis screening tools are established methods to help reduce patient mortality. Nurse familiarity with ‘red flag’ criteria for sepsis and thorough completion of early warning scores facilitate earlier recognition and time critical intervention. Delivery of the ‘sepsis six’ within 1 hour of suspected sepsis saves lives.
Demystifying, recognising and combating racism during the pandemic
Authors: Markey Kathleen , Zhang Yu
Published: November 2020

The increased reports of escalation of social inequalities, xenophobic and racist ideologies during the COVID-19 pandemic presents a growing concern. Nurses are not immune to xenophobia and racism, both as perpetrators and as victims. Although COVID-19 brings a new wave of xenophobia and racism, healthcare organisations have been tackling discriminatory and racist practices for decades. However, racist practice quite often goes undetected or unchallenged due to its associated sensitivity and a lack of understanding of its complexity. There is a need for a more open and non-judgemental discourse around interpretations of racism and its predisposing factors as a means of combating the growing reports. This discussion paper proposes a practice-orientated conceptualisation of racism and outlines some particular and sustainable areas for consideration for nurses to use in their daily practice. Developing self-awareness and nurturing the courage, confidence and commitment to challenge self and others is critical for transforming ethnocentric and racist ideologies.
Improving the care of patients with acute kidney injury
Authors: Bonfield Becky
Published: November 2020

Becky Bonfield, Lead Advanced Nurse Practitioner, University Hospital Southampton NHS Foundation Trust ( Becky.Bonfield@uhs.nhs.uk ), runner-up in the Renal Nurse of the Year category in the BJN Awards 2020
Developing a model of employment creation in border region: Gaharu cultivation and honey bee farming in Bengkayang, West Kalimantan, Indonesia
Authors: Bariyah Nurul
Published: November 2020

Abstract. Bariyah N. 2020. Developing a model of employment creation in border region: Gaharu cultivation and honey bee farming in Bengkayang, West Kalimantan, Indonesia. Biodiversitas 21: 5237-5247. The border regions possess political, cultural, and socio-economic complexity. One of major problems in the border regions is the lack of employment opportunity following ups and downs in the economy, suggesting a need for a more sustainable employment opportunity by harnessing local conditions and practices. The main objective of the research was to construct an economic development model in the border region by integrating available natural resources, local initiatives, and external support to provide employment opportunities. We conducted the research in Jagoi Village, Bengkayang District, West Kalimantan, Indonesia which has border with Sarawak, Malaysia. We collected primary data through in-depth interviews, structured interviews, observation, and focus group discussion combined with secondary data. This information was then used to construct the model. Our research found that the population of Jagoi Village consisted of farmers (50%), menial laborers (30%), traders (17%), civil servants (2%), and ojek taxi drivers (1%). In the past, they also received additional income from collecting wild bee honey and gaharu (agarwood) resin. However, large tracks of forest area were cut by commercial loggers or converted into oil palm plantations. Fortunately, Jagoi Village has adat forest which preserved the forest from the expansion of oil palm plantation and is a source of non-wood products to use by the community could use. The research revealed that collecting wild bee honey and gaharu was no longer viable. Started from these conditions, we proposed a model of employment creation by cultivating gaharu and farming honey bee. As such, there is paradigm change from ‘collecting’ or ‘gathering’ into ‘cultivation’ and farming. To be successful, the model integrates six elements, consisting of awareness building, local initiatives, success stories as an example, external support or empowerment, field school, and independent execution. Using this approach the target community will be able to create new employment opportunities which eventually increases their income and prosperity.
In vitro spore germination and early gametophyte development of Cibotium barometz (L.) J. Sm. in different media
Authors: ISNAINI Yupi , Praptosuwiryo Titien Ngatinem
Published: November 2020

Abstract. Isnaini Y, Praptosuwiryo TNg. 2020. In vitro spore germination and early gametophyte development of Cibotium barometz (L.) J. Sm. in different media. Biodiversitas 21: 5373-5381. Cibotium barometz (L.) J. Sm. is known as the golden chicken fern and included in Appendix II of CITES. It is an important export commodity for traditional and modern medicine. Globally, populations of this species are under significant pressure due to overexploitation in the wild. In vitro culture is one of the technologies used for ex-situ propagation and conservation of rare and endangered ferns and lycophytes. This study’s objectives were: (i) to observe in vitro spore germination and early gametophyte development of C. barometz, and (ii) to determine the best culture medium for rapid spore germination and early development of the gametophytes. The sterilized spores were sown in half-strength Murashige & Skoog (½MS) basal medium supplemented with combinations of 6-Benzylaminopurine (BAP) and α-Naphthalene acetic acid (NAA). A factorial combination of four BAP concentrations (0, 2, 4, and 6 mg L-1) with four concentrations of NAA (0; 0.01; 0.03 and 0.05 mg L-1) created 16 treatments replicated in a Completely Randomized Design. Spore germination of C. barometz was observed to be Vittaria-type, and its prothallial development was Drynaria-type. Spore germination started 7-14 days after sowing. Young heart-shape gametophytes consisting of 110-240 cells were formed in 45-61 days after sowing. The two best spore culture media for rapid spore germination and development of C. barometz gametophytes were ½ MS with or without 2 mg L-1 BAP.
Short Communication: The mitochondrial cytochrome c oxidase subunit I (COI) for identification of batoids collected from landed sites in Medan, Indonesia
Authors: SUDIBYO MUFTI , Lubis Khairiza , FARAJALLAH ACHMAD , HANIM NISFA
Published: November 2020

Abstract. Lubis K, Sudibyo M, Farajallah A, Hanim N. 2020. Short Communication: The mitochondrial cytochrome c oxidase subunit I (COI) for identification of batoids collected from landing sites in Medan, Indonesia. Biodiversitas 21: 5414-5421.  Batoids are member of Elsamoranch subclass which consist of many species. Most of batoids species are overexploited, especially in Medan Indonesia. Up to presents, the information about diversity of rays on the east coast of North Sumatra, Indonesia was very limited. Therefore, this research aimed to investigate the diversity of rays on the east coast of North Sumatra. We examined the morphological trait of 82 individuals of batoid from three landing sites on the east coast of North Sumatra, namely: Tanjung Balai, Belawan, and Percut, then identify its species based on determination key. After that, we collected pectoral muscle tissue from an individual in each species which successfully identified to extract its genomic DNA. Molecular based identification was carried out by using DNA fragment form COI gene. The successfully amplificated COI gene DNA fragment then was sequenced and analyzed. Based on morphological trait, we successfully identifying nine species of batoid, which is Maculabatis gerrardi, Gymnura poecilura, Dasyatis zugei, Brevitrygon heterura, Neotrygon kuhlii, Hemitrygon bennettii, Rhinobatos jimbaranensis, Rhinoptera javanica, and Taeniura lymma. The result of identification based on COI gene DNA fragment was in congruent with morphological-based identification based on data BLAST-N and genetic distance value within same species. The nucleotide diversity within same species ranged from 0-15 nucleotide variants.
Morphoanatomy of three Indigofera species (Leguminosae-Papilionoideae) in Java, Indonesia
Authors: Fugarasti Henta , MUZZAZINAH Muzzazinah , Ramli Murni
Published: November 2020

Abstract. Fugarasti H, Muzzazinah, Ramli M. 2020. Morphoanatomy of three Indigofera species (Leguminosae-Papilionoideae) in Java Indonesia. Biodiversitas 21: 5531-5538. This study aimed to explore the morphological and detailed anatomical features of the stems, leaves, and roots from three Indonesian Indigofera species. Morphological-anatomical studies of three Indonesian Indigofera species were carried out using embedded microscopic preparations. The anatomical characters of the specimens were observed using a compound optical microscope with magnification 40x, 100x, and 400x. The observation showed the anatomical cross-section of  I. tinctoria stem was rectangular, I. suffruticosa was hexagonal, and I. arrecta was rounded. The tissue structures of Indigofera species, from the outside layer, were the epidermis, thin cortex, secondary phloem (narrow or wide), thick secondary xylem, and conspicuous pith in the middle. Whilst, the corner of I. suffruticosa stem contained thick collenchyma. The vascular bundles were the open collateral. The leaves of Indigofera species are made up of the upper epidermis, mesophyll (palisade parenchyma, spongy parenchyma), and the lower epidermis. The vascular bundles were located in the middle, with five or six segments of the xylem elements and small groups of phloem elements, all in the parallel lines. The primary stele type of the roots is actinostele, cambium activity pushed him aside. The vascular bundle of the roots consisted of a dense and tight secondary xylem composed of thick-walled circular vessels (mostly tightly arranged). Data about the morphoanatomy structure of three Indonesian Indigofera species could complement the novelty of the morpho-anatomy information records obtained by previous researchers.
Short Communication: The ecological and economic values of secondary forest on abandoned land in Samarinda, East Kalimantan Province, Indonesia
Authors: Karmini Karmini , Karyati Karyati , Widiati Kusno Yuli
Published: November 2020

There is a large area of abandoned land that is not taken manage of after plantation activities in the tropic. These abandoned gardens which have been neglected for a long time have important ecological and economic values. This study aims to assess the existence of abandoned land in the tropic from an ecological and economic perspective. The ecological aspects assessed were stand structure, floristic composition, and species diversity. Meanwhile, the economic aspects analyzed were log price, harvesting cost, profit margin, and stumpage value. The vegetation survey was carried out on all woody trees with a diameter at bresst height (DBH) > 5 cm in 10 subplots each sized 20 m × 20 m. A total of.192 trees were recorded of 29 species belonging to 19 genera and 17 families. The most dominant species were Macaranga triloba (Importance Value, IV of 46.16), Macaranga tanarius (IV of 22.97), and Nephelium lappaceum (IV of 20.94). The indexes of diversity, dominance, evenness, and richness in the studied plots were 1.33, 0.06, 0.40, and 5.33, respectively. The means of wood price, logging cost, profit margin, and stumpage value at abandoned land were USD199.55 m-3, USD69.01 m-3, USD25.45 m-3, and USD51.56 ha-1, respectively. The abandoned lands with high ecological and economic value indicate the important role of abandoned lands in the secondary succession process in the tropics.
DEVELOPMENT OF Tabebuia aurea AND Anadenanthera macrocarpa UNDER DIFFERENT LEVELS OF SHADING
Authors: Silveira Gleydson Vinicius , Holanda Alan Cauê , Alves Allyson Rocha , Silva Françóyse Dávilla , Oliveira João Lucas
Published: November 2020

The efficiency in the initial growth of trees can be related to the ability of the seedlings in adapting to different light intensites in the enviroment. The objective of this work was to evaluate the influence of different levels of shading in the initial growth of Tabebuia aurea and Angico (Anadenanthera macrocarpa) in the nursery phase. The experiment was conducted at the Federal Rural University of Semiárido located in Mossoró-RN. The seeds of A. macrocarpa and T. aurea were collected from parent trees and donated by the Caatinga/ UFERSA / Petrobras Project, where, afterwards, they were processed. The composting used in the experiment was coconut fiber, after the substrate was placed in 55-cm³ tubes and organized in plastic supports. The seedlings were submitted to three levels of shade, full sun (absence of shade), shade of 50% and 80%. For the different levels of shading, mean values of the height/diameter ratio of the neck were obtained of 3.74 (A. macrocarpa) and 1.57 (T. aurea) for cultivation in full sun, 0% of shading, indicating that the growth of this cropt may have better results under these conditions. The highest values of the Dickson Quality Index (DQI) were observed in seedlings grown under a lower shade level of 0.03454 and 0.11719. The species T. aurea shows little tolerance when subjected to high levels of shading, showing that the luminosity interfere in the initial growth of the species. A. macrocarpa, also acquired a better development in full sun, showing less progress at higher levels of shading.
IRRIGATION FREQUENCIES FOR Eucalyptus grandis SEEDLINGS
Authors: Cruz Gustavo Henrique Miguel da , Cunha Fernando França da , Souza Epitácio José de , Silva Andrisley Joaquim da , Filgueiras Roberto
Published: November 2020

One of the bottlenecks in relation to the production of forest seedlings is irrigation, especially in less-tech nurseries. The small volumes of substrate, where the seedlings develop, lead to low water storage. This fact can lead to water deficit and significant losses in the production of seedlings, generating even mortality. The objective of this study was to determine the best irrigation frequencies for Eucalyptus grandis seedling production in less-tech nurseries. The experiment was conducted between 2013/08/04 and 2013/23/07 (106 days) and conducted in Chapadão do Sul county, Brazil. The experiment was set up in a randomized complete block design, with five replications. Four irrigation frequencies were tested: IF1 (one daily irrigation - 11:00 a.m.), IF2 (two daily irrigations - 11:00 a.m. and 7:00 p.m.), IF3 (three daily irrigations - 07:00 a.m., 11:00 a.m. and 7:00 p.m.) and IF4 (four daily irrigations - 07:00 a.m., 11:00 a.m., 3:00 p.m. and 7:00 p.m.). The sample units were composed of eight seedlings in 50 cm3 conical tubes filled with soil and vermiculite in a volume ratio of 1:1. The irrigation depth was estimated by reference evapotranspiration (Penman-Monteith) multiplied by a crop coefficient equal to two. Plant height, number of definitive leaves, shoot dry mass (root and total), seed quality index, survival and efficiency of water use by eucalyptus seedlings were evaluated. The average daily irrigation depth in the experimental period was 5.2 mm. Based on the results, it is recommended for eucalyptus seedling producers, in less-tech nursery, irrigation management twice per days. (11:00 a.m. and 7:00 p.m.).
Hyperspectral imaging and spectral unmixing for improving whole-body fluorescence cryo-imaging
Authors: Wirth Dennis , Byrd Brook , Meng Boyu , Strawbridge Rendall R. , Samkoe Kimberley S. , Davis Scott C.
Published: November 2020

Whole-animal fluorescence cryo-imaging is an established technique that enables visualization of the biodistribution of labeled drugs, contrast agents, functional reporters and cells in detail. However, many tissues produce endogenous autofluorescence, which can confound interpretation of the cryo-imaging volumes. We describe a multi-channel, hyperspectral cryo-imaging system that acquires densely-sampled spectra at each pixel in the 3-dimensional stack. This information enables the use of spectral unmixing to isolate the fluorophore-of-interest from autofluorescence and/or other fluorescent reporters. In phantoms and a glioma xenograft model, we show that the approach improves detection limits, increases tumor contrast, and can dramatically alter image interpretation.
Light transport modeling in highly complex tissues using the implicit mesh-based Monte Carlo algorithm
Authors: Yuan Yaoshen , Yan Shijie , Fang Qianqian
Published: November 2020

The mesh-based Monte Carlo (MMC) technique has grown tremendously since its initial publication nearly a decade ago. It is now recognized as one of the most accurate Monte Carlo (MC) methods, providing accurate reference solutions for the development of novel biophotonics techniques. In this work, we aim to further advance MMC to address a major challenge in biophotonics modeling, i.e. light transport within highly complex tissues, such as dense microvascular networks, porous media and multi-scale tissue structures. Although the current MMC framework is capable of simulating light propagation in such media given its generality, the run-time and memory usage grow rapidly with increasing media complexity and size. This greatly limits our capability to explore complex and multi-scale tissue structures. Here, we propose a highly efficient implicit mesh-based Monte Carlo (iMMC) method that incorporates both mesh- and shape-based tissue representations to create highly complex yet memory-efficient light transport simulations. We demonstrate that iMMC is capable of providing accurate solutions for dense vessel networks and porous tissues while reducing memory usage by greater than a hundred- or even thousand-fold. In a sample network of microvasculature, the reduced shape complexity results in nearly 3x speed acceleration. The proposed algorithm is now available in our open-source MMC software at http://mcx.space/#mmc.
Genetic diversity and structure of wild Vaccinium populations - V. myrtillus, V. vitis-idaea and V. uliginosum in the Baltic States
Authors: Gailīte Agnese , Gaile Anita , Ruņģis Dainis
Published: November 2020

L., L. and L. belong to the genus . These wild species are widely distributed and ecologically important within the Baltic countries but they have not been extensively studied using molecular markers. EST-SSR and cpSSR markers were used to investigate the population structure and genetic diversity of these species to obtain information useful for the development of conservation strategies. Wild species populations are moderately genetically differentiated, with some populations more highly differentiated, but without higher order clustering of groups of populations, indicating that there are no dispersal barriers for these species within the Baltic countries. Genetic diversity of populations growing in protected areas, managed forests and intensively utilised public recreational areas is similar. The results from this study can be utilised for the selection of populations for the conservation of the studied species. In addition, complementary conservation strategies can be used for the preservation of rare varieties (e.g. var. ).VacciniummyrtillusV. vitis-idaeaV. uliginosumVacciniumin situVacciniumin situVacciniumex situV. myrtillusleucocarpum