bluuebunny/crossref_metadata_2025_split huggingface dataset:
Timing of seed dispersal and dormancy, rather than persistent soil seed-banks, control seedling recruitment of woody plants in Neotropical savannas
Authors: Salazar Ana , Goldstein Guillermo , Franco Augusto C. , Miralles-Wilhelm Fernando 
Published: January 2011

AbstractA large fraction of tree species forming persistent soil seed-banks and with dormant seeds are expected to be found in strongly seasonal ecosystems such as Neotropical savannas, where seedling recruitment could be highly variable. In the savannas of Central Brazil, we studied seed characteristics (type of dormancy, longevity and moisture content) of 14 representative woody species differing in seed dispersal season. We also studied the dynamics of soil seed-banks and similarity patterns in woody species composition among seed rain, soil seed-bank, seedling bank and standing vegetation along shallow topographic gradients that differ in canopy cover. Woody species composition of the soil seed-bank largely differed from the standing vegetation, the seed rain and the seedling bank species composition, suggesting low recruitment of woody species from the soil seed-bank. Seeds of the 14 woody species remained viable for less than 16 months in laboratory dry-storage conditions. Of those, most seeds dispersed in the dry season were dormant and exhibited low moisture content, while most seeds dispersed in the wet season were non-dormant and exhibited high moisture content. Longevity of these seeds dispersed in the dry and the wet seasons did not differ significantly. This study shows that both timing of seed dispersal and dormancy appear to control timing of seed germination and seedling recruitment of most Neotropical savanna woody species, which did not form persistent soil seed-banks. This study contributes to the understanding of tree/grass coexistence and tree density variations along topographic gradients in tropical savannas.
Organic weed control in white lupin (Lupinus albus L.)
Authors: Folgart A. , Price A. J. , van Santen E. , Wehtje G. R. 
Published: January 2011

AbstractLegumes such as white lupin (Lupinus albus L.) provide a valuable nitrogen source in organic agriculture. With organic farming hectarage increasing and white lupin interest increasing in the southeastern USA due to newly released winter hardy cultivars, non-chemical weed control practices in lupin are needed. A two-year experiment was established at two locations in Alabama. Five weed control practices were evaluated: one pre-emergence (PRE)-applied herbicide (S-metolachlor), two mechanical (hand hoed) and two cultural (living mulch utilizing two black oat cultivars) weed control treatments. Fourteen weed species were encountered. S-metolachlor provided above 80% control of most weed species present in this experiment. The cultivation treatments and black oat companion crops also provided good weed control of many of the weeds encountered. Crop injury of all treatments was low on a 0 to 10 scale with 0 representing no injury: <2.0, <1.3 and <1.2 by S-metolachlor, the cultivation treatments and the black oat companion crops, respectively. Grain yield of cultivars ABL 1082, AU Alpha and AU Homer were 1540, 1130, 850 kg ha−1, respectively, when treated with the conventional treatment, S-metolachlor. Grain yield in the organic treatments was equivalent. The cultivation treatments and black oat companions were successful alternative weed control practices in white lupin production.
Impact of reduced tillage on soil organic carbon and nutrient budgets under organic farming
Authors: Gadermaier Florian , Berner Alfred , Fließbach Andreas , Friedel Jürgen Kurt , Mäder Paul 
Published: January 2011

AbstractNo-tillage (NT) and reduced tillage (RT) systems are well-known management tools for reducing soil erosion and improving soil fertility. NT and RT may improve the environmental and economic performance of organic farming, but they are still not common practice among organic farmers. This paper presents the effects of tillage [RT versus conventional tillage (CT)], fertilization (slurry versus manure compost) and biodynamic preparations (with versus without) on soil fertility indicators such as soil organic carbon (Corg), microbial biomass and microbial activity, soil nutrients and nutrient budgets in an organic farming system during the first six-year crop rotation period of a long-term experiment on a clayey soil in a temperate climate. RT caused stratification of soil organic carbon (Corg), microbial properties and soil nutrients in the soil profile. Under RT, Corgin the 0–10 cm soil layer increased from 2.19 to 2.61% (w/w) from 2002 to 2008, whereas it remained constant under CT. In both tillage treatments, Corgremained constant in the 10–20 cm soil depth. Microbial biomass C increased by 37% under RT in the 0–10 cm soil depth and microbial activity [dehydrogenase activity (DHA)] was enhanced by 57%. Soil microbial biomass C and DHA in the 10–20 cm soil depth were also higher under RT (+10 and +17%, respectively). Soluble soil P and K were 72 and 40%, respectively, higher in 0–10 cm soil depth under RT when compared with CT. Fertilization showed no effects on the measured soil properties. Biodynamic preparations increased solely the Cmic-to-Nmic(soil microbial biomass C to soil microbial biomass N) ratio by 7% in the 0–10 cm soil depth. Nutrient budgets for P were balanced in all treatments, but N and K exports were higher under RT compared to CT. We conclude that RT is a suitable method for increasing indicators of soil fertility in organic farming systems. The combined effects of RT and an organic farming system with a diverse, ley-based crop rotation and organic fertilization merit further promotion and it may be considered for supporting actions by the agricultural policy schemes.
Comparative genomics of two newly isolated Dehalococcoides strains and an enrichment using a genus microarray
Authors: Lee Patrick K H , Cheng Dan , Hu Ping , West Kimberlee A , Dick Gregory J , Brodie Eoin L , Andersen Gary L , Zinder Stephen H , He Jianzhong , Alvarez-Cohen Lisa 
Published: January 2011

Abstract
Comparative genomics of Dehalococcoides strains and an enrichment were performed using a microarray targeting genes from all available sequenced genomes of the Dehalococcoides genus. The microarray was designed with 4305 probe sets to target 98.6% of the open-reading frames from strains 195, CBDB1, BAV1 and VS. The microarrays were validated and applied to query the genomes of two recently isolated Dehalococcoides strains, ANAS1 and ANAS2, and their enrichment source (ANAS) to understand the genome–physiology relationships. Strains ANAS1 and ANAS2 can both couple the reduction of trichloroethene, cis-dichloroethene (DCE) and 1,1-DCE, but not tetrachloroethene and trans-DCE with growth, whereas only strain ANAS2 couples vinyl chloride reduction to growth. Comparative genomic analysis showed that the genomes of both strains are similar to each other and to strain 195, except for genes that are within the previously defined integrated elements or high-plasticity regions. Combined results of the two isolates closely matched the results obtained using genomic DNA of the ANAS enrichment. The genome similarities, together with the distinct chlorinated ethene usage of strains ANAS1, ANAS2 and 195 demonstrate that closely phylogenetically related strains can be physiologically different. This incongruence between physiology and core genome phylogeny seems to be related to the presence of distinct reductive dehalogenase-encoding genes with assigned chlorinated ethene functions (pceA, tceA in strain 195; tceA in strain ANAS1; vcrA in strain ANAS2). Overall, the microarrays are a valuable high-throughput tool for comparative genomics of unsequenced Dehalococcoides-containing samples to provide insights into their gene content and dechlorination functions.
Co-occurrence patterns for abundant marine archaeal and bacterial lineages in the deep chlorophyll maximum of coastal California
Authors: Beman J Michael , Steele Joshua A , Fuhrman Jed A 
Published: January 2011

Abstract
Microorganisms remineralize and respire half of marine primary production, yet the niches occupied by specific microbial groups, and how these different groups may interact, are poorly understood. In this study, we identify co-occurrence patterns for marine Archaea and specific bacterial groups in the chlorophyll maximum of the Southern California Bight. Quantitative PCR time series of marine group 1 (MG1) Crenarchaeota 16S rRNA genes varied substantially over time but were well-correlated (r2=0.94, P&lt;0.001) with ammonia monooxygenase subunit A (amoA) genes, and were more weakly related to 16S rRNA genes for all Archaea (r2=0.39), indicating that other archaeal groups (for example, Euryarchaeota) were numerically important. These data sets were compared with variability in bacterial community composition based on automated ribosomal intergenic spacer analysis (ARISA). We found that archaeal amoA gene copies and a SAR11 (or Pelagibacter) group Ib operational taxonomic unit (OTU) displayed strong co-variation through time (r2=0.55, P&lt;0.05), and archaeal amoA and MG1 16S rRNA genes also co-occurred with two SAR86 and two Bacteroidetes OTUs. The relative abundance of these groups increased and decreased in synchrony over the course of the time series, and peaked during periods of seasonal transition. By using a combination of quantitative and relative abundance estimates, our findings show that abundant microbial OTUs—including the marine Crenarchaeota, SAR11, SAR86 and the Bacteroidetes—co-occur non-randomly; they consequently have important implications for our understanding of microbial community ecology in the sea.
Nitrogen fixation and nitrogenase (nifH) expression in tropical waters of the eastern North Atlantic
Authors: Turk Kendra A , Rees Andrew P , Zehr Jonathan P , Pereira Nicole , Swift Paul , Shelley Rachel , Lohan Maeve , Woodward E Malcolm S , Gilbert Jack 
Published: January 2011

Abstract
Expression of nifH in 28 surface water samples collected during fall 2007 from six stations in the vicinity of the Cape Verde Islands (north-east Atlantic) was examined using reverse transcription-polymerase chain reaction (RT-PCR)-based clone libraries and quantitative RT-PCR (RT-qPCR) analysis of seven diazotrophic phylotypes. Biological nitrogen fixation (BNF) rates and nutrient concentrations were determined for these stations, which were selected based on a range in surface chlorophyll concentrations to target a gradient of primary productivity. BNF rates greater than 6 nmolN l−1 h−1 were measured at two of the near-shore stations where high concentrations of Fe and PO43− were also measured. Six hundred and five nifH transcripts were amplified by RT-PCR, of which 76% are described by six operational taxonomic units, including Trichodesmium and the uncultivated UCYN-A, and four non-cyanobacterial diazotrophs that clustered with uncultivated Proteobacteria. Although all five cyanobacterial phylotypes quantified in RT-qPCR assays were detected at different stations in this study, UCYN-A contributed most significantly to the pool of nifH transcripts in both coastal and oligotrophic waters. A comparison of results from RT-PCR clone libraries and RT-qPCR indicated that a γ-proteobacterial phylotype was preferentially amplified in clone libraries, which underscores the need to use caution interpreting clone-library-based nifH studies, especially when considering the importance of uncultivated proteobacterial diazotrophs.
List restructuring in Arabic–English translation
Authors: Dickins James 
Published: January 2011

This paper deals with the translation from Arabic to English of lists, i.e. phrases consisting of at least two, and typically three or more, noun phrases, adjective phrases, etc. which belong to a relatively coherent semantic field. Section 1 considers four standard techniques for translating Arabic semantic repetition into English: maintenance of repetition, merging, grammatical transposition, and semantic distancing. Section 2 defines listing as an extension of semantic repetition, and identifies basic listing structures in English and Arabic. Sections 3–3.5 look at techniques for translating Arabic lists into English on the basis of the first three translation techniques for semantic repetition discussed in Section 2. Section 3.1 looks at list retention (cf. maintenance of repetition), considering where this is and is not acceptable. Section 3.2 looks at list reduction/merging (cf. semantic merging). Sections 3.3–3.5 look at techniques which parallel grammatical transposition as a technique for translation semantic repetition: embedded coordination, as a form of subordination (Section 3.3), standard subordination (Section 3.4), and the combination of embedded coordination with standard subordination (Section 3.5). Section 3.6 considers summary definition, as a translation technique which goes beyond merging. Section 4 considers the significance of listing patterns in Arabic and English in the context of the more general preference in Arabic for coordination and in English for subordination. Section 5 raises the possibility that the preference for coordination in Arabic may correlate with a larger textual preference for ostensive presentation, while the preference for subordination in English may correlate with a larger textual preference for analytical summary. I suggest that, if true, this may give rise to translation issues which are effectively intractable.
The plasma–sheath transition in low temperature plasmas: on the existence of a collisionally modified Bohm criterion
Authors: Brinkmann R P 
Published: January 2011

The plasma–sheath transition in stationary low temperature plasmas is investigated for arbitrary levels of collisionality. The model under study contains the equations of continuity and motion for a single ion species, Boltzmann's equilibrium for the electrons and Poisson's equation for the field. Assuming that the electron Debye length λD is small compared with the ion gradient length l = n
i/(∂n
i/∂x), a first order differential equation is established for the ion density n
i as a function of the transformed spatial coordinate q = ∫n
i dx. A characteristic feature of this novel sheath equation is an internal singularity of the saddle point type which separates the depletion-field dominated sheath part of the solution from the ambipolar diffusion-controlled plasma. The properties of this singularity allow us to define, in a nonarbitrary way, a collisionally modified Bohm criterion which recovers Bohm's original expression in the collisionless limit but also remains meaningful when collisions are included.
A comparison is made with the collisionally modified Bohm criteria proposed by Godyak (1982 Phys. Lett. A 89 80), Valentini (1996 Phys. Plasmas
3 1459) and Chen (1997 Phys. Plasmas
5 804) as well as with the approaches of Riemann (1991 J. Phys. D: Appl. Phys.
24 493) and Franklin (2003 J. Phys. D: Appl. Phys.
36 2821), who argued that the definition of a collisionally defined Bohm criterion is not possible.
Beyond Constitutionalism
Authors: Krisch Nico 
Published: January 2011

AbstractThis book traces a fundamental transformation in law—the turn towards ‘postnational law’—which reflects the increasing enmeshment of national, regional, and international law and calls into question central legitimating principles of the different layers. Two fundamental approaches to the structure of this new legal order stand out and form the focus of this book: constitutionalism and pluralism. Postnational constitutionalism embodies the hope of integrating the order through an overarching legal framework that would tame politics by defining relations and institutionalizing key values. Yet such a constitutionalist order would require too massive a transformation of postnational institutions and society, and thinner approaches, widespread in the literature and more realistic, would sell the constitutionalist promise short. This book proposes instead to conceptualize and develop the postnational order in a pluralist vein, characterized by a multiplicity of legal sub-orders, not connected through an overarching frame but interacting in often political modes. Many areas of regional and global governance can be understood in such terms, as demonstrated here for the European human rights regime, the UN sanctions regime in its tension with human rights, and the regime complex of international trade, environment, and food safety. The pluralism on display in these examples also holds normative appeal. By reflecting diverging views on the right scope of the polity, it respects individuals’ autonomy and their right to shape their political order, thus furthering democratic values. By leaving relations between different layers of law unsettled, it allows for contestation and adaptation which helps to stabilize postnational governance and remedy power imbalances in its initial design. In the highly diverse and contested space of the postnational, breaking with domestic political traditions and going ‘beyond constitutionalism’ towards a pluralist order may be the better option.
Postnational Law in Search of a Structure
Authors: Krisch Nico 
Published: January 2011

AbstractChapter 1 analyses the turn to postnational law and the main frames for conceptualizing it. As binary distinctions of inside/outside and binding/non-binding are giving way to more gradated forms of normative authority in the practice of governance in and beyond the state, national, regional, and international law are increasingly enmeshed. The emerging postnational law puts pressure on the guiding principles and forms of legitimation of the different orders—thick domestic forms of legitimacy and thin, consent-based and diversity-oriented international ones are no longer neatly separated and come into conflict. Attempts at containing this challenge by re-domesticating global governance in national constitutional frameworks appear as both impractical and normatively problematic. For the new, postnational legal order, two structural visions—constitutionalism and pluralism—stand out; they form the focus of this book. This chapter briefly introduces them and provides an overview of the different chapters.
Pluralist Challenges
Authors: Krisch Nico 
Published: January 2011

AbstractChapter 8 inquires into pluralism's implications for democracy and the rule of law. It does not develop a full-fledged theory of postnational democracy, but analyses the ways in which a pluralist order relates to key parameters of such a theory. Pluralism's appeal lies in its ability to respond to the plurality of governance sites, the multiplicity of demoi, and the importance of contestation in a multidimensional approach to democracy adequate for the postnational space. Greater concerns often stem from pluralism's tensions with the rule of law and legal certainty. Such concerns are, however, exaggerated: also in constitutionalist settings, legal certainty is always limited and the rule of law does not represent an absolute value. As the chapter shows, the rule of law also has a place in the construction of the ‘interface norms’ through which the layers of law in a pluralist order regulate their relations. These norms should reflect the autonomy pedigree of the different layers and strive for compatibility among layers with similar pedigrees.
Conclusion: Postnational Pluralism and Beyond
Authors: Krisch Nico 
Published: January 2011

AbstractChapter 9 summarizes the argument in the preceding chapters and sketches broader implications of the turn towards pluralism in postnational law. The case for pluralism may also have repercussions for debates on domestic law and politics. It suggests that pluralism may be appealing more broadly in societies characterized by strong diversity and contestation. The rise of pluralism also affects our general understanding of the phenomenon of law as such. The multiplicity of sub-orders in the postnational legal order stands in tension with the idea of unity, often regarded as central to the idea of law. The different, often conflicting normative orientations of these sub-orders also question the image of universality and impartiality and allow the law to appear more clearly as the pursuit of very particular, and inevitably partial projects.
Freedom and Belief
Authors: Strawson Galen 
Published: January 2011

AbstractThere are many senses in which we can be said to be free agents, and to be morally responsible. There is also, however, a strong, fundamental, and natural sense in which these things are impossible. Very briefly: we cannot be ultimately responsible for how we act. Why not? Because when we act, we do what we do because of the way we are, all things considered, and we cannot be ultimately responsible for the way we are. Suppose this is right: ultimate responsibility is impossible. Can we nevertheless state what would be necessary and sufficient for someone to possess ultimate responsibility (as we can state the necessary and sufficiently conditions of being a round square)? One proposal is that one would have to be causa sui, truly, ultimately the cause or source of oneself, at least in fundamental mental or characteral respects. Another proposal considered in this book is that one could not really count as a free agent (even if one was somehow causa sui) unless one also experienced oneself as, or believed oneself to be, a free agent. This raises the question whether believing something to be the case could ever be a condition of its actually being the case (the idea is highly paradoxical). It also leads to a sustained discussion of the experience of agency, and of being a free agent. Generally speaking, the metaphysical possibilities seem fairly clear when it comes to the question of free will. The remaining questions of interest may have more to do with the phenomenology of freedom, and more generally, moral psychology.
Climate Change Law and Policy
Authors: Carlarne Cinnamon P. 
Published: January 2011

AbstractGlobal climate change presents one of the most difficult problems the international community has ever faced. Recent events at the 2009 Copenhagen Climate Change Conference suggest that the United Nations is not yet equipped to address the issue, and national politics reveal that, in most cases, domestic politicians have neither the political will nor the regulatory tools at their disposal to structure effective policy regimes. Against this daunting backdrop, the experiences of United States and European Union climate policy over the last two decades offers instructive lessons. The historical evolution in US and EU climate policy exemplifies how climate change has risen to the top of political agendas in divergent contexts while the spans separating US and EU climate policy to date epitomize the struggles inherent in on-going global efforts to address climate change. Neither the EU nor the US offer unqualified lessons in success, but both offer many lessons, some of which reveal successes but all of which offer opportunities to learn from social, political, and regulatory experiments. Premised on the notion that US and EU efforts to address climate change are closely linked to global climate change politics, this book explores the content and process of climate change law and policymaking in the US and the EU to reveal policy convergences and divergences, and to examine how these convergences and divergences influence the ability of the global community to structure a sustainable, effective, and equitable long-term climate strategy.