bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sugar Preferences in Nectar‐ and Fruit‐Eating Birds: Behavioral Patterns and Physiological Causes1
Authors: Lotz Chris N. , Schondube Jorge E. 
Published: November 2005

ABSTRACTSucrose, glucose, and fructose are the three sugars that commonly occur in floral nectar and fruit pulp. The relative proportions of these three sugars in nectar and fruit in relation to the sugar preferences of pollinators and seed dispersers have received considerable attention. Based on the research of Herbert and Irene Baker and their collaborators, a dichotomy between sucrose‐dominant hummingbird‐pollinated flowers and hexose‐dominant passerine flowers and fruits was proposed. Data on sugar preferences of several hummingbird species (which prefer sucrose) vs. a smaller sample of passerines (which prefer hexoses) neatly fitted this apparent dichotomy. This hummingbird–passerine dichotomy was strongly emphasized until the discovery of South African plants with sucrose‐dominant nectars, which are pollinated by passerines that are able to digest, and prefer sucrose. Now we know that, with the exception of two clades, most passerines are able to assimilate sucrose. Most sugar preference studies have been conducted using a single, relatively high, sugar concentration in the nectar (ca 20%). Thus, we lack information about the role that sugar concentration might play in sugar selection. Because many digestive traits are strongly affected not only by sugar composition, but also by sugar concentration, we suggest that preferences for different sugar compositions are concentration‐dependent. Indeed, recent studies on several unrelated nectar‐feeding birds have found a distinct switch from hexose preference at low concentrations to sucrose preference at higher concentrations. Finally, we present some hypotheses about the role that birds could have played in molding the sugar composition of plant rewards.
Responses of a Specialized Insectivorous Mammal (Myrmecophaga tridactyla) to Variation in Ambient Temperature1
Authors: Camilo‐Alves Constança de Sampaio e Paiva , Mourão Guilherme de Miranda 
Published: November 2005

ABSTRACTThis study reports the effect of daily mean ambient temperature on daily activity and habitat use by the giant anteater (Myrmecophaga tridactyla) in the Pantanal wetlands of Brazil. We equipped 11 giant anteaters with a global position system collar programmed to acquire a location every 10 min for 15 d. A temperature data logger left in the meteorological station at the study site registered data on ambient temperature. Giant anteaters were mainly active in open fields except during the coldest days, when they sought protection inside forests. Giant anteaters also used open habitats for resting but during the hottest or chilliest days they sheltered in forests. In the Pantanal, where temperatures are usually high, giant anteaters were active all night long, but as daily average ambient temperature decreased anteaters began and finished activity progressively earlier and reduced total activity. As a consequence, time spent active at daylight increased progressively and time spent active during the night decreased progressively, probably to allow the anteaters to expose themselves to solar radiation and to avoid heat loss during the night.
Behavioral Response of Resident Jamaican Birds to Dry Season Food Supplementation1
Authors: Brown David R. , Sherry Thomas W. 
Published: November 2005

ABSTRACTWe used plot‐level manipulations and analyses to test the effects of food availability on the behavior and condition of resident dry‐forest birds in Jamaica. Two control plots were monitored in each of 2 yr. Food was supplemented on five plots over 2 yr with piles of cut oranges distributed around plots, which served as a direct source of carbohydrates and water, and an indirect source of ground arthropods due to increased above‐ground activity. We reduced ants on five plots over 2 yr; however, we found no difference in total ground arthropod biomass between control and reduction treatments, so we pooled these plots for analysis. We selected nine focal resident bird species for study of relative abundance, body condition, and breeding condition. Birds were sampled prior to, and 5 to 6 weeks after the initiation of treatments. Seven of nine species had higher relative abundance following food supplementation. Three species were recaptured more frequently in supplementation plots than in control plots. These abundance and persistence responses did not cause any changes in body condition. In one species, Bananaquit (Coereba flaveola), food supplementation resulted in higher concentrations of individuals in breeding condition. These results demonstrate a functional response to dry‐season food availability and suggest a limiting mechanism. This study helps explain mechanisms by which bird populations respond to resource availability, and is the first successful plot‐level food supplementation experiment for tropical forest birds.
Generations, Mobility and Community: Geographies of Three Generations of Greek and Italian Ancestry in Sydney
Authors: BURNLEY IAN. H. 
Published: November 2005

AbstractGeographies of three generations of Greek and Italian ancestry in Sydney totalling 245 000 people in 2001 are identified. A model of community sequences is developed within a conceptual framework of intergenerational spatial, occupational and social absorption. Considerable intra‐ and inter‐generational occupational mobility took place and the third generations showed higher proportions as managers, professionals and associate professionals than persons of Australian ancestry. Second and third generations had occupational profiles which were much closer to the host society than the first generations. Despite occupational mobility, employment, residential and social trends associated with the first generations affected the adult second generations and to an extent the third. Several thousand members of three generations re‐grouped into successive local communities, patronised facilities in core communities, and maintained place identities.
The Changing Health Care Behaviour of the Hmong Refugee Population in Sydney
Authors: WANG JENNIFER A. 
Published: November 2005

AbstractHealth care behaviour of Hmong refugees in Sydney was investigated after research in the United States had shown that, within the Southeast Asian refugee community in that country, Hmong refugees not only had the lowest rates of use of Western medicine but also were the most likely to assess their quality of health as only fair (Brainard and Zaharlick, 1989, 849). In contrast, this study found that the Sydney Hmong generally used Western medicine as a system of first choice. At the same time, most continued to use traditional medicines, albeit in a modified form. Minimal costs, freedom to choose their own doctor and appropriate, long term health education were the most important factors in Hmong using Western medicine in Sydney. Other contributing factors included the structure and size of the community, the presence of a long‐term Hmong resident in Sydney upon arrival and familiarity with Western medicine. Thus, the Sydney Hmong community was able to maintain a reasonable quality of health at an affordable price. An unexpected finding was the improved social, economic and health status of Hmong women. Such differentiated results are a powerful argument for not looking at refugees as a homogenous group, even when investigating a single, national, ethnic or cultural group. This study highlighted both the multidisciplinary and transdisciplinary nature of health care behaviour and the contribution that a small in‐depth case study can make to health and migrant policy.
Regionalisation of Environmental Management: a Case Study of the Natural Heritage Trust, South Australia
Authors: FARRELLY MEGAN 
Published: November 2005

AbstractRegional planning for and management of the environment and natural resources are the new foci of the Australian Government's funding initiative, the Natural Heritage Trust Phase Two (NHT2). NHT2 attempts to integrate and coordinate the efforts of the many local environmental community groups that work on‐ground. By operating at the regional scale, it is expected that more strategic and targeted outcomes will be achieved. This paper examines how the shift to regional‐scale delivery has affected key stakeholders in South Australia, focussing on the experiences of a sub‐regional environmental community group. Interviews with key regional stakeholders, participant observation and document analysis highlighted difficulties in the transition to regional delivery, for both regional and local groups. Limited funding, restrictive timelines, vague guidelines and prescriptive information, slowed the development of the regional plan and frustrated regional groups. A lack of communication and limited community participation in developing the regional plan created uncertainty and confusion in the sub‐regional community group, resulting in mistrust of and alienation from the regional groups. Concern was also expressed over the loss of the local‐scale focus, particularly as community leaders moved to higher decision‐making positions within the region. It is too early too assess the effectiveness of the regional groups. However, if the issues identified during the transitional phase are not addressed, then the regional groups may struggle to achieve their objectives.
Letting Indigenous People Talk About Their Country: a Case Study of Cross‐Cultural (Mis)communication in an Environmental Management Planning Process
Authors: LLOYD D. , VAN NIMWEGEN P. , BOYD W. E. 
Published: November 2005

AbstractThis paper presents a case study, based on the experiences of two senior Aboriginal traditional owners who were engaged in negotiations surrounding the establishment of a Regional Forest Agreement (RFA) in southeast Queensland. This case is notable as an illustration of the capacity of natural resource management planning, through negotiation within a formal process, to extinguish native title. Importantly, the personal experiences of two senior Aboriginal people provide an insight into a situation designed to enhance interactions between government and community, with the overt intention of improving natural resource management. However, the record of this personal experience indicates that the communication was less than satisfactory and that the outcomes, at least in terms of the experiences recorded here, of the individual senior Aboriginal community members, was less than satisfactory. We conclude that, despite best intentions, there is an important lack of provision for community influence or power, including any legal or administrative institutional framework. We also conclude that there are important institutional and social processes of engagement still to be developed, including ways of engaging the community more widely that has conventionally been the case.
Recent Storm Boulder Deposits on the Beecroft Peninsula, New South Wales, Australia
Authors: SAINTILAN N. , ROGERS K. 
Published: November 2005

AbstractThis paper documents the deposition of large boulders on the Beecroft Peninsula, New South Wales, during a one in four‐year swell event in October 1999. The size of the boulders in relation to the magnitude of the swell suggests that the boulder field at Whale Point on the Beecroft Peninsula is explicable in terms of storm swells alone.
The Buckling of Spherical Liposomes
Authors: Pamplona D. C. , Greenwood J. A. , Calladine C. R. 
Published: November 2005

Abstract
In the classical “first approximation” theory of thin-shell structures, the constitutive relations for a generic shell element—i.e. the elastic relations between the bending moments and membrane stresses and the corresponding changes in curvature and strain, respectively—are written as if an element of the shell is flat, although in reality it is curved. In this theory it is believed that discrepancies on account of the use of “flat” constitutive relations will be negligible provided the ratio shell-radius∕thickness is of sufficiently large order. In the study of drawing of narrow, cylindrical “tethers” from liposomes it has been known for many years that it is necessary to use instead a constitutive law which explicitly describes a curved element in order to make sense of the mechanics; and indeed such tethers are generally of “thick-walled” proportions. In this paper we show that the proper constitutive relations for a curved element must also be used in the study, by means of shell equations, of the buckling of initially spherical thin-walled giant liposomes under exterior pressure: these involve the inclusion of what we call the “Mκ” terms, which are not present in the standard “first-approximation” theory. We obtain analytical expressions for both the bifurcation buckling pressure and the slope of the post-buckling path, in terms of the dimensions and elastic constants of the lipid bi-layer, and also the initial state of bending moment in the vesicle. We explain physically how the initial bending moment can affect the bifurcation pressure, whereas it cannot in “first-approximation” theory. We use these results to map the conditions under which the vesicle buckles into an oblate, as distinct from a prolate (“rugby-ball”) shape. Some of our results were obtained long ago by the use of energy methods; but our aim here has been to identify precisely what is lacking in “first-approximation” theory in relation to liposomes, and so to put the “shell equations” approach onto a firm footing in mechanics.
Measurement of Strain in the Left Ventricle during Diastole with
cine-MRI and Deformable Image Registration
Authors: Veress Alexander I. , Gullberg Grant T. , Weiss Jeffrey A. 
Published: November 2005

Abstract
The assessment of regional heart wall motion (local strain) can localize ischemic myocardial disease, evaluate myocardial viability, and identify impaired cardiac function due to hypertrophic or dilated cardiomyopathies. The objectives of this research were to develop and validate a technique known as hyperelastic warping for the measurement of local strains in the left ventricle from clinical cine-magnetic resonance imaging (MRI) image datasets. The technique uses differences in image intensities between template (reference) and target (loaded) image datasets to generate a body force that deforms a finite element (FE) representation of the template so that it registers with the target image. To validate the technique, MRI image datasets representing two deformation states of a left ventricle were created such that the deformation map between the states represented in the images was known. A beginning diastolic cine-MRI image dataset from a normal human subject was defined as the template. A second image dataset (target) was created by mapping the template image using the deformation results obtained from a forward FE model of diastolic filling. Fiber stretch and strain predictions from hyperelastic warping showed good agreement with those of the forward solution (R2=0.67 stretch, R2=0.76 circumferential strain, R2=0.75 radial strain, and R2=0.70 in-plane shear). The technique had low sensitivity to changes in material parameters (ΔR2=−0.023 fiber stretch, ΔR2=−0.020 circumferential strain, ΔR2=−0.005 radial strain, and ΔR2=0.0125 shear strain with little or no change in rms error), with the exception of changes in bulk modulus of the material. The use of an isotropic hyperelastic constitutive model in the warping analyses degraded the predictions of fiber stretch. Results were unaffected by simulated noise down to a signal-to-noise ratio (SNR) of 4.0 (ΔR2=−0.032 fiber stretch, ΔR2=−0.023 circumferential strain, ΔR2=−0.04 radial strain, and ΔR2=0.0211 shear strain with little or no increase in rms error). This study demonstrates that warping in conjunction with cine-MRI imaging can be used to determine local ventricular strains during diastole.
Simple Nonparametric Techniques for Exploring Changing Probability Distributions of Weather
Authors: Ferro Christopher A. T. , Hannachi Abdelwaheb , Stephenson David B. 
Published: November 2005

AbstractAnthropogenic influences are expected to cause the probability distribution of weather variables to change in nontrivial ways. This study presents simple nonparametric methods for exploring and comparing differences in pairs of probability distribution functions. The methods are based on quantiles and allow changes in all parts of the probability distribution to be investigated, including the extreme tails. Adjusted quantiles are used to investigate whether changes are simply due to shifts in location (e.g., mean) and/or scale (e.g., variance). Sampling uncertainty in the quantile differences is assessed using simultaneous confidence intervals calculated using a bootstrap resampling method that takes account of serial (intraseasonal) dependency. The methods are simple enough to be used on large gridded datasets. They are demonstrated here by exploring the changes between European regional climate model simulations of daily minimum temperature and precipitation totals for winters in 1961–90 and 2071–2100. Projected changes in daily precipitation are generally found to be well described by simple increases in scale, whereas minimum temperature exhibits changes in both location and scale.
Estimation of the Surface Heat Flux Response to Sea Surface Temperature Anomalies over the Global Oceans
Authors: Park Sungsu , Deser Clara , Alexander Michael A. 
Published: November 2005

Abstract
The surface heat flux response to underlying sea surface temperature (SST) anomalies (the surface heat flux feedback) is estimated using 42 yr (1956–97) of ship-derived monthly turbulent heat fluxes and 17 yr (1984–2000) of satellite-derived monthly radiative fluxes over the global oceans for individual seasons. Net surface heat flux feedback is generally negative (i.e., a damping of the underlying SST anomalies) over the global oceans, although there is considerable geographical and seasonal variation. Over the North Pacific Ocean, net surface heat flux feedback is dominated by the turbulent flux component, with maximum values (28 W m−2 K−1) in December–February and minimum values (5 W m−2 K−1) in May–July. These seasonal variations are due to changes in the strength of the climatological mean surface wind speed and the degree to which the near-surface air temperature and humidity adjust to the underlying SST anomalies. Similar features are observed over the extratropical North Atlantic Ocean with maximum (minimum) feedback values of approximately 33 W m−2 K−1 (9 W m−2 K−1) in December–February (June–August). Although the net surface heat flux feedback may be negative, individual components of the feedback can be positive depending on season and location. For example, over the midlatitude North Pacific Ocean during late spring to midsummer, the radiative flux feedback associated with marine boundary layer clouds and fog is positive, and results in a significant enhancement of the month-to-month persistence of SST anomalies, nearly doubling the SST anomaly decay time from 2.8 to 5.3 months in May–July.
Several regions are identified with net positive heat flux feedback: the tropical western North Atlantic Ocean during boreal winter, the Namibian stratocumulus deck off West Africa during boreal fall, and the Indian Ocean during boreal summer and fall. These positive feedbacks are mainly associated with the following atmospheric responses to positive SST anomalies: 1) reduced surface wind speed (positive turbulent heat flux feedback) over the tropical western North Atlantic and Indian Oceans, 2) reduced marine boundary layer stratocumulus cloud fraction (positive shortwave radiative flux feedback) over the Namibian stratocumulus deck, and 3) enhanced atmospheric water vapor (positive longwave radiative flux feedback) in the vicinity of the tropical deep convection region over the Indian Ocean that exceeds the negative shortwave radiative flux feedback associated with enhanced cloudiness.
Seasonal Climate Predictability in a Coupled OAGCM Using a Different Approach for Ensemble Forecasts
Authors: Luo Jing-Jia , Masson Sebastien , Behera Swadhin , Shingu Satoru , Yamagata Toshio 
Published: November 2005

Abstract
Predictabilities of tropical climate signals are investigated using a relatively high resolution Scale Interaction Experiment–Frontier Research Center for Global Change (FRCGC) coupled GCM (SINTEX-F). Five ensemble forecast members are generated by perturbing the model’s coupling physics, which accounts for the uncertainties of both initial conditions and model physics. Because of the model’s good performance in simulating the climatology and ENSO in the tropical Pacific, a simple coupled SST-nudging scheme generates realistic thermocline and surface wind variations in the equatorial Pacific. Several westerly and easterly wind bursts in the western Pacific are also captured.
Hindcast results for the period 1982–2001 show a high predictability of ENSO. All past El Niño and La Niña events, including the strongest 1997/98 warm episode, are successfully predicted with the anomaly correlation coefficient (ACC) skill scores above 0.7 at the 12-month lead time. The predicted signals of some particular events, however, become weak with a delay in the phase at mid and long lead times. This is found to be related to the intraseasonal wind bursts that are unpredicted beyond a few months of lead time. The model forecasts also show a “spring prediction barrier” similar to that in observations. Spatial SST anomalies, teleconnection, and global drought/flood during three different phases of ENSO are successfully predicted at 9–12-month lead times.
In the tropical North Atlantic and southwestern Indian Ocean, where ENSO has predominant influences, the model shows skillful predictions at the 7–12-month lead times. The distinct signal of the Indian Ocean dipole (IOD) event in 1994 is predicted at the 6-month lead time. SST anomalies near the western coast of Australia are also predicted beyond the 12-month lead time because of pronounced decadal signals there.
The Forcing of the Pacific Decadal Oscillation*
Authors: Schneider Niklas , Cornuelle Bruce D. 
Published: November 2005

Abstract
The Pacific decadal oscillation (PDO), defined as the leading empirical orthogonal function of North Pacific sea surface temperature anomalies, is a widely used index for decadal variability. It is shown that the PDO can be recovered from a reconstruction of North Pacific sea surface temperature anomalies based on a first-order autoregressive model and forcing by variability of the Aleutian low, El Niño–Southern Oscillation (ENSO), and oceanic zonal advection anomalies in the Kuroshio–Oyashio Extension. The latter results from oceanic Rossby waves that are forced by North Pacific Ekman pumping. The SST response patterns to these processes are not orthogonal, and they determine the spatial characteristics of the PDO. The importance of the different forcing processes is frequency dependent. At interannual time scales, forcing from ENSO and the Aleutian low determines the response in equal parts. At decadal time scales, zonal advection in the Kuroshio–Oyashio Extension, ENSO, and anomalies of the Aleutian low each account for similar amounts of the PDO variance. These results support the hypothesis that the PDO is not a dynamical mode, but arises from the superposition of sea surface temperature fluctuations with different dynamical origins.