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Registros recuperados: 13
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An annotated checklist of the Arcella (Arcellidae) from littoral zone of Paranoá lake-Brazil, with a pictorial key Biological Sciences
Silva, Mariana Lessa Carneiro da; Rangel, Elisangela Reis; Lansac-Tôha, Fabio Amodêo; Schwind, Leilane Talita Fatoreto; Joko, Ciro Yoshio.
The pictorial key contributes to taxonomic analysis, as it lists the species found in a given environment, and points out the morphological characteristics that differs one specific taxon from the others. Arcellidae Ehrenberg, 1830 is one of the testate amoebae families with highest representativity in terms of richness and abundance, including three genera, that Arcella shows greater dispersion in different types of aquatic biotopes. The zooplankton community in the Paranoá Lake has been extensively studied over the decades. However, there are no studies on testate amoebae in this environment. The study aimed to develop a pictorial key to help in the identification of Arcella in the Paranoá Lake. Samples were taken with plankton net at 13 sites in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.04.05.00-6 protist; Taxonomy; Biological diversity; Plankton; Arcellidae; Center west Taxonomia dos Grupos Recentes.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/29187
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Comparing Farm and Village-Level Determinant of Millet Diversity in Marginal Environments of India: The Context of Seed Systems AgEcon
Nagarajan, Latha; Smale, Melinda; Glewwe, Paul.
The purpose of the research paper is to characterize biological diversity related to millets in the semi-arid regions of India at various spatial scales of analysis (e.g., farm household versus community levels) and place that evidence in a broader seed systems (includes both formal and informal) context. An important finding of this research is that producer access to millet genetic resources is affected by the extent to which seed is traded via formal markets or through other social institutions, along with farm and household characteristics. Findings also underscore the need for an enhanced theoretical understanding of local seed markets in analyzing crop variety choices and the diversity of materials grown in less favored environments.
Tipo: Working or Discussion Paper Palavras-chave: Millet diversity; Seed systems; Local markets; Crop diversity; Biological diversity; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/59235
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Definitions of Biodiversity and Measures of Its Value AgEcon
Simpson, R. David.
The destruction of natural habitats has prompted concerns about the loss of biological diversity. Regrettably, however, there is no consensus among either biologists or economists on the most meaningful measures of biodiversity. Fundamentally different definitions are useful in asking fundamentally different questions. Considerable attention has been given to the value of diversity in search models. A measure of "aggregate variability" is appropriate to such models. Values derived from search models tend to be well behaved; they exhibit diminishing returns in diversity. In contrast, a definition of diversity as "relative abundance" is more appropriate to more complex objective functions. Values derived in these models are not necessarily well behaved. The...
Tipo: Working or Discussion Paper Palavras-chave: Biological diversity; Biodiversity; Diversity index; Abundance; Search; Variability; Consistency; Contingent valuation; Diminishing returns; Increasing returns; Environmental Economics and Policy; D43; D83; Q20.
Ano: 2002 URL: http://purl.umn.edu/10551
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Ethnobotanical survey of medicinal plants used by the community of Sobradinho, Luís Correia, Piauí, Brazil. Repositório Alice
SILVA, J. D. A.; NASCIMENTO, M. G. P.; GRAZINA, L. G.; CASTRO, K. N. de C.; MAYO, S. J.; ANDRADE, I. M..
An ethnobotanical survey of medicinal plants used by the Sobradinho community, Luís Correia, Piauí, Brazil was undertaken to recover and document traditional knowledge with the aim of supporting chemical, biological, agronomic, pharmaceutical and socio-economic studies related to the region's biodiversity. Fifteen research visits to the community were made between March 2013 to January 2014 involving 31 respondents from the community, the majority (74.4%) being women aged between 27 and 84 years. The methodology used was interview by the snowball method using questionnaires. Analysis of the data gathered was based on use value and the Shannon-Wiener diversity index. Botanical voucher specimens were made of the species cited by informants and deposited at...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Diversidade biológica; Florística; Etnobotânica; Planta medicinal; Biological diversity; Ethnobotany; Floristics; Medicinal plants.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1030073
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First insights into the structure and environmental setting of cold-seep communities in the Marmara Sea ArchiMer
Ritt, Benedicte; Sarrazin, Jozee; Caprais, Jean-claude; Noel, Philippe; Gauthier, Olivier; Pierre, Catherine; Henry, Pierre; Desbruyeres, Daniel.
A brackish-water cold seep on the North Anatolian Fault (NAF) in the Marmara Sea was investigated with the Nautile submersible during the MarNaut cruise in 2007. This active zone has already been surveyed and revealed evidence of active seeping on the seafloor, such as bubble emissions, patches of reduced sediments, microbial mats and authigenic carbonate crusts. MarNaut was the first opportunity to sample benthic communities in the three most common microhabitats (bioturbated and reduced sediments, carbonate crust) and to examine their relationships with environmental conditions. To do so, faunal communities were sampled and chemical measurements were taken close to the organisms. According to diversity indices, the bioturbated microhabitat exhibited the...
Tipo: Text Palavras-chave: Marmara Sea; Cold seep; Benthic fauna; Biological diversity; Environmental conditions; Chemosynthetic.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00014/12506/9528.pdf
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Geographic variation in diversity of wave exposed rocky intertidal communities along central Chile RChHN
BROITMAN,BERNARDO R; VÉLIZ,FREDY; MANZUR,TATIANA; WIETERS,EVIE A; RANDALL FINKE,G; FORNES,PAULINA A; VALDIVIA,NELSON; NAVARRETE,SERGIO A.
Along the coast of central Chile, geographic trends of diversity have been inferred from literature compilations and museum collections based on species range limits for some taxonomic groups. However, spatially-intensive field-based assessments of macrobenthic species richness are largely missing. Over the course of a multiyear study (1998-2005), we characterized latitudinal patterns of rocky intertidal diversity at 18 sites along the coast of central Chile (29-36° S). At each site, the number of sessile and mobile macrobenthic species was quantified in 0.25 m² quadrats. Two estimators of local (alpha) diversity were used: observed local species richness, calculated from the asymptote of a species-rarefaction curve, and the Chao2 index, which takes into...
Tipo: Journal article Palavras-chave: Biological diversity; Intertidal ecology; Latitudinal diversity gradient; Species richness.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000100011
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Planetary Boundaries: Exploring the Safe Operating Space for Humanity Ecology and Society
Steffen, Will; Stockholm Resilience Centre, Stockholm University; Australian National University, Australia; will.steffen@anu.edu.au; Noone, Kevin; Stockholm Resilience Centre, Stockholm University; Department of Applied Environmental Science, Stockholm University; kevin.noone@stockholmresilience.su.se; Chapin, F. Stuart III; Institute of Arctic Biology, University of Alaska Fairbanks; fschapiniii@alaska.edu; Lambin, Eric; Department of Geography, University of Louvain; lambin@geog.ucl.ac.be; Lenton, Timothy M; School of Environmental Sciences, University of East Anglia; t.lenton@uea.ac.uk; Scheffer, Marten; Aquatic Ecology and Water Quality Management Group, Wageningen University; Marten.Scheffer@wur.nl; Folke, Carl; Stockholm Resilience Centre, Stockholm University; The Beijer Institute of Ecological Economics, Royal Swedish Academy of Sciences; carl.folke@beijer.kva.se; Schellnhuber, Hans Joachim; Potsdam Institute for Climate Impact Research; Environmental Change Institute and Tyndall Centre, Oxford University ; schellnhuber@pik-potsdam.de; de Wit, Cynthia A; Department of Applied Environmental Science, Stockholm University; cynthia.de.wit@itm.su.se; Hughes, Terry; ARC Centre of Excellence for Coral Reef Studies, James Cook University; terry.hughes@jcu.edu.au; van der Leeuw, Sander; School of Human Evolution and Social Change, Arizona State University; vanderle@asu.edu; Rodhe, Henning; Department of Meteorology, Stockholm University; rodhe@misu.su.se; Snyder, Peter K; Department of Soil, Water, and Climate, University of Minnesota; pksnyder@umn.edu; Costanza, Robert; Stockholm Resilience Centre, Stockholm University; Gund Institute for Ecological Economics, University of Vermont; rcostanz@uvm.edu; Svedin, Uno; Stockholm Resilience Centre, Stockholm University; uno.svedin@formas.se; Falkenmark, Malin; Stockholm Resilience Centre, Stockholm University; Stockholm International Water Institute; malin.falkenmark@siwi.org; Karlberg, Louise; Stockholm Resilience Centre, Stockholm University; Stockholm Environment Institute; louise.karlberg@stockholmresilience.su.se; Corell, Robert W; The H. John Heinz III Center for Science, Economics and the Environment ; Corell@heinzctr.org; Fabry, Victoria J; Department of Biological Sciences, California State University San Marcos; fabry@csusm.edu; Hansen, James; NASA Goddard Institute for Space Studies; James.E.Hansen@nasa.gov; Walker, Brian; Stockholm Resilience Centre, Stockholm University; CSIRO Sustainable Ecosystems; Brian.Walker@csiro.au; Liverman, Diana; Environmental Change Institute, School of Geography and the Environment; Institute of the Environment, University of Arizona ; diana.liverman@eci.ox.ac.uk; Richardson, Katherine; Earth System Science Centre, University of Copenhagen; kari@science.ku.dk; Crutzen, Paul; Max Planck Institute for Chemistry; air@mpch-mainz.mpg.de; Foley, Jonathan; Institute on the Environment, University of Minnesota; jfoley@umn.edu.
Anthropogenic pressures on the Earth System have reached a scale where abrupt global environmental change can no longer be excluded. We propose a new approach to global sustainability in which we define planetary boundaries within which we expect that humanity can operate safely. Transgressing one or more planetary boundaries may be deleterious or even catastrophic due to the risk of crossing thresholds that will trigger non-linear, abrupt environmental change within continental- to planetary-scale systems. We have identified nine planetary boundaries and, drawing upon current scientific understanding, we propose quantifications for seven of them. These seven are climate change (CO2 concentration in the atmosphere <350 ppm and/or a maximum change...
Tipo: Peer-Reviewed Reports Palavras-chave: Atmospheric aerosol loading; Biogeochemical nitrogen cycle; Biological diversity; Chemical pollution; Climate change; Earth; Global freshwater use; Land system change; Ocean acidification; Phosphorus cycle; Planetary boundaries; Stratospheric ozone; Sustainability.
Ano: 2009
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POTENTIAL SPECIES RICHNESS OF FROGS AND DIURNAL BUTTERFLIES IN THREE BIOGEOGRAPHICAL UNITS FROM NORTHEASTERN COLOMBIA: CONSERVATION IMPLICATIONS Acta biol.Colomb.
ACEVEDO,Aldemar A.; ARMESTO SANGUINO,Orlando; OLARTE QUIÑÓNEZ,Camilo Andrés; SOLANO,Liliana; ALBORNOZ ESPINEL,Mónica María; CABRERA,James Alexis; CARRERO SARMIENTO,Diego Armando.
ABSTRACT We present an estimation of the potential species richness of frogs, and diurnal butterflies distributed in the departments of Norte de Santander and Santander, Colombia, and analyze the implications for conservation of such high Andean species. From June 2012 to May 2016, we sampled across the Almorzadero, Santurbán and Tamá biogeographical units to gather presence data of 7 anuran species and 29 butterflies species from the superfamily Papilionoidea. We modeled the potential distribution of each species, converted every model to binary, and the sum up of unique species per cell allowed to estimate the model of potential richness, generating the total number of species for every 1 km2 cell. Every model was validated against field data, vegetation...
Tipo: Journal article Palavras-chave: Biogeography; Biological diversity; Conservation; High Andean species; Species distribution models.
Ano: 2018 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2018000200151
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Projet SINP - Synthèse des indicateurs institutionnels de biodiversité marine et côtière ArchiMer
Fossat, Julia; Pelletier, Dominique; Levrel, Harold.
Le gouvernement français s’est engagé à travers différentes conventions et textes institutionnels à stopper d’ici 2010 la perte de la biodiversité. Pour atteindre cet objectif, le Ministère de l’Ecologie, de l’Energie, du Développement Durable et de la Mer (MEEDDM) a mis en place le Système d’Information sur la Nature et les Paysages (SINP), afin de rassembler et structurer l’information sur le patrimoine naturel et la biodiversité. Le volet marin de ce système, le SINP mer, a également pour vocation de valoriser ces informations, soit de présenter des indicateurs permettant de répondre aux enjeux de conservation de la biodiversité marine à partir des données contenues dans le système. Ce document présente la première phase de travail sur les indicateurs...
Tipo: Text Palavras-chave: Biodiversité; Diversité biologique; Diversité écosystémique; Diversité spécifique; Indicateur; Marin; Côtier; Cadre institutionnel; Convention; Système d’information; Biodiversity; Biological diversity; Ecosystem diversity; Species diversity; Indicator; Marin; Coastal; Institutional framework; Convention; Information system.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00083/19471/17084.pdf
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Rethinking the Risk Management Process for Genetically Engineered Crop Varieties in Small-scale, Traditionally Based Agriculture Ecology and Society
Cleveland, David A; University of California, Santa Barbara; cleveland@es.ucsb.edu; Soleri, Daniela; University of California, Santa Barbara; soleri@es.ucsb.edu.
Tipo: Peer-Reviewed Reports Palavras-chave: Agricultural biotechnology; Biological diversity; Biological invasion; Crop genetic resources; Farmer participation in risk evaluation; Gene flow; Genetic engineering; Risk analysis; Risk management process; Traditionally based agricultural systems compared with industrial agriculture systems; Transgenes; Transgenic crop varieties.
Ano: 2005
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Selection of bee species for environmental risk assessment of GM cotton in the Brazilian Cerrado. Repositório Alice
PIRES, C. S. S.; SILVEIRA, F. A.; CARDOSO, C. F.; SUJII, E. R.; PAULA, D. P.; FONTES, E. M. G.; SILVA, J. P. da; RODRIGUES, S. M. M.; ANDOW, D. A..
2014
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gossypium hirsutum; Biological diversity; Ecological risk assessment; Pollination services; Transgenic crops; Wild bees.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1000938
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Selection of bee species for environmental risk assessment of GM cotton in the brazilian Cerrado. Repositório Alice
PIRES, C. S. S.; SILVEIRA, F. A.; CARDOSO, C. F.; SUJII, E. R.; PAULA, D. P.; FONTES, E. M. G.; SILVA, J. P. da; RODRIGUES, S. M. M.; ANDOW, D. A..
The objective of this work was to list potential candidate bee species for environmental risk assessment (ERA) of genetically modified (GM) cotton and to identify the most suited bee species for this task, according to their abundance and geographical distribution. Field inventories of bee on cotton flowers were performed in the states of Bahia and Mato Grosso, and in Distrito Federal, Brazil. During a 344 hour sampling, 3,470 bees from 74 species were recovered, at eight sites. Apis mellifera dominated the bee assemblages at all sites. Sampling at two sites that received no insecticide application was sufficient to identify the three most common and geographically widespread wild species: Paratrigona lineata , Melissoptila cnecomola and Trigona spinipes ,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ecological risk assessment; Pollination services; Transgenic crops; Wild bees; Diversidade biológica; Avaliação de risco ambiental; Serviços de polinização; Cultura trangênica; Abelha silvestre; Gossypium hirsutum; Gossypium hirsutum; Biological diversity.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/995463
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What shapes the phylogenetic structure of anuran communities in a seasonal environment? The influence of determinism at regional scale to stochasticity or antagonistic forces at local scale. Repositório Alice
MARTINS, C. de A.; ROQUE, F. de O.; SANTOS, B. A.; FERREIRA, V. L.; STRUSSMANN, C.; TOMAS, W. M..
Ecological communities are structured by both deterministic and stochastic processes. We investigated phylogenetic patterns at regional and local scales to understand the influences of seasonal processes in shaping the structure of anuran communities in the southern Pantanal wetland, Brazil. We assessed the phylogenetic structure at different scales, using the Net Relatedness Index (NRI), the Nearest Taxon Index (NTI), and hylobetadiversity indexes, as well as a permutation test, to evaluate the effect of seasonality. The anuran community was represented by a non-random set of species with a high degree of phylogenetic relatedness at the regional scale. However, at the local scale the phylogenetic structure of the community was weakly related with the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Southern Pantanal; Seasonality; Biological diversity; Biodiversidade; Biogeography; Community ecology.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1018918
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