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Registros recuperados: 49
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Abiotic gradients drive floristic composition and structure of plant communities in the Monte Desert RChHN
ACEBES,PABLO; TRABA,JUAN; PECO,BEGOÑA; REUS,MARÍA L; GIANNONI,STELLA M; MALO,JUAN E.
Defining plant communities in desert zones is difficult due to large scale homogeneity and small scale heterogeneity, thus making provision of systematic information for conservation decisions problematic. We analysed plant communities of the most arid sector of Monte Desert for structure, plant composition and environmental variables. Small-scale variables such as slope, rock cover, bare ground and litter, as well as large-scale ones such as species diversity, composition and similarity within and between sites were included. Analyses of floristic composition showed the difficulty of segregating distinct communities due to high internal heterogeneity and overlap between the different sites. Only mesquite woodlands, a community situated at the extreme of...
Tipo: Journal article Palavras-chave: Arid environment; Heterogeneity; Shrubland; Similarity; Species richness.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000300007
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Low predictive power of mid-domain effect to explain geographic species richness patterns in Palearctic songbirds Naturalis
Aliabadian, M.; Roselaar, C.S.; Sluys, R.; Nijman, V..
In the study of diversity patterns, the Mid-domain effect (MDE), which explains gradients in diversity solely on the basis of geometric constraints, has emerged as a null-model against which other hypotheses can be tested. The effectiveness, measured by its predictive power, of these MDE models appears to depend on the size of the study area and the range-sizes of the taxa considered. Here we test the predictive power of MDE on the species richness patterns of birds and assess its effectiveness for a variety of species range sizes. We digitised distribution maps of 889 species of songbird endemic to the Palearctic, and analysed the emergent biogeographic patterns with WORLDMAP software. MDE had a predictive power of 20% when all songbirds were included....
Tipo: Article / Letter to the editor Palavras-chave: Aves; Passeriformes; Palearctic; Mid-domain effect; Species richness; Geographic range size; 42.83.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/256132
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Richness pattern and phytogeography of the Cerrado herb?shrub flora and implications for conservation. Repositório Alice
AMARAL, A. G.; MUNHOZ, C. B. R.; WALTER, B. M. T.; AGUIRRE-GUTIÉRREZ, J.; RAES, N..
bitstream/item/165797/1/Amaral-et-al-2017-Journal-of-Vegetation-Science.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Neotropical savannas; PAM clustering; Species distribution model; Protected areas; Species richness.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078445
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Analysis of the contribution and efficiency of the Santuario de la Naturaleza Yerba Loca, 33º S in protecting the regional vascular plant flora (Metropolitan and Fifth regions of Chile) RChHN
ARROYO,MARY T. K; MARTICORENA,CLODOMIRO; MATTHEI,OSCAR; MUÑOZ,MÉLICA; PLISCOFF,PATRICIO.
Santuario de la Naturaleza Yerba Loca (SN Yerba Loca), Metropolitan Region (MR), 33º S, Chile is analyzed for its conservation value and efficiency in protecting native vascular plants in a regional context. The reserve's flora of 500 species and subtaxa was evaluated for species richness, endemism, range size and marginally distributed taxa, using species-area analysis, and tendencies in the floras of the MR (1.434 species and subtaxa) and MR-Fifth regions (1,841 species and subtaxa) to set the regional pattern. The reserve (0.7 % of MR land area and 0.3 % MR-Fifth land area) contains 34 % of the MR and 27% of the MR-Fifth floras, and around 16-17 % of the mediterranean-climate area (regions IV-VIII) flora of central Chile. Veech's Relative Richness Index...
Tipo: Journal article Palavras-chave: Conservation efficiency; Endemism; Hotspot; Protected area; Mediterranean flora; Species richness.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000400012
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Les virus de l'estuaire de la Charente el du bassin de Marennes-Oleron. Dynamiques spatio-temporelles et interactions avec les communautés bactériennes ArchiMer
Auguet, Jean-christophe.
This study is divided in two parts; one aim is to evaluate the in situ spalio-temporal dynamics of viral communities in the Charante estuary in order to define the appropriate seasons to conduct in vitro viral enrichment experiments. These experiments, that constitute the second part of this study, were performed to assess the impact of freshwater viruses carried by the Charante River on the dynamics and composition of coastal bacterial communities. With abundance ranging from 1.4 x 107 to 208 x I07 VLPml-1. viruses are the most abundant component among plankton microorganisms in surface waters of the Charente estuary. Thre temporal dynamics of this component reflects the indirect influence of temperature through the control of bacterial abundance,...
Tipo: Text Palavras-chave: Richesse spécifique; Composition clonale; Enrichissement vital; Infection lyrique; Structure des communautés; MET; PPGE; Dynamique temporelle; Gradient de salinité; Estuaire; Bactérioplancton; Virioplancton; Species richness; Clonal composition; Viral enrichment; Lytic infection; Community structure; Diversity; TEM; PEGE; Temporal dynamic; Gradient; Salinity; Estuary; Bacterioplankton; Virioplankton.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-3071.pdf
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FAUNA NOCTURNA ASOCIADA A LOS MANGLARES Y OTROS HUMEDALES EN LA VÍA PARQUE ISLA DE SALAMANCA, DEPARTAMENTO DEL MAGDALENA, CARIBE COLOMBIANO Boletín de Investigaciones
Balaguera-Reina,Sergio A.; González-Maya,José F.; Acero P.,Arturo.
This note reports the faunal species associated with mangroves and other wetlands in nocturnal periods in the Vía Parque Isla de Salamanca in order to support management and conservation planning for this natural park. The study was carried out from September through December 2006 using nocturnal surveys. We report 19 species including invertebrates such as arachnids, crustaceans, and mollusks, and vertebrates such as amphibians, reptiles, birds, and mammals. We focused on those species that are classified as threatened either nationally or internationally, and those for which VIPIS represents an information need and an important area for ensuring their persistence.
Tipo: Journal article Palavras-chave: Nocturnal activity; Fauna; Species richness; Mangroves; Vía Parque Isla de Salamanca.
Ano: 2010 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612010000100011
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Large and medium-sized mammals from Chandless State Park, Acre, Brazil. Mastozool. neotrop.
Borges,Luiz H. M; Calouro,Armando M; de Sousa,Jesus R. D.
The Neotropical region hosts the greatest diversity of mammals in the world. Western Amazonia, where the State of Acre is located, harbors one of the highest mammalian species diversity in the Neotropics. Mammals are considered important biodiversity components and play a key role in regulating and structuring forest ecosystems. However, there are considerable knowledge gaps regarding species distribution and rich­ness in the Amazon region. This study aims at documenting the medium and large-sized mammal species in Chandless State Park (PEC - Parque Estadual Chandless) giving special attention to those classified as rare or threatened. Four different methods were used in two years of research, 2008 and 2013: linear transect, camera trap, interviews and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Camera trap; Conservation Units; Linear transect; Species richness; Tracks.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832015000200005
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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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AMBIENTES MARINOS DE LA PLATAFORMA SOMERA DE LA GUAJIRA, CARIBE COLOMBIANO* Boletín de Investigaciones
Chasqui,Luis; Nieto,Ramón; Rodríguez-Rincón,Angélica; Gil-Agudelo,Diego L.
A brief description of seven benthic environments found in La Guajira's shallow continental shelf from Boca de Camarones to Cabo de la Vela between 3 to 20 m depth is presented. Cover percentage of main benthic components, organic matter proportion in sediment, and main organisms observed in each environment are listed. The dominant environment was "arenal" (sandy bottom) covering 47% of total area sampled, whereas most species were observed in the environments "fondo mixto" (mixed bottom), "cascajo compuesto" (composed gravel) and "corales y esponjas sobre cascajo" (corals and sponges on gravel).
Tipo: Journal article Palavras-chave: La Guajira; Shallow continental platform; Benthic environments; Species richness.
Ano: 2013 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612013000200011
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Community composition and species richness of parasitoids infesting Yponomeuta species in the Netherlands Naturalis
Cleary, Daniel F.R..
Parasitoid assemblages infesting Yponomeuta species in the Netherlands were investigated. Parasitoid species richness and community composition were related to host species, habitat, temporal and spatial variation. Both community structure and species richness did not differ among habitats. There was no significant difference in species richness between years (1994 and 1995) but there was a significant difference in community composition. Community composition and species richness both differed among host species, although this latter result was solely due to the host species Y. evonymellus. There was no significant relationship between community similarity and distance. These results indicate that the parasitoids of the moth genus Yponomeuta in the...
Tipo: Article / Letter to the editor Palavras-chave: ANOSIM; Beta diversity; Community composition; Distance; Species richness.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/534398
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Contribution to a synopsis of marine species richness in the Pertuis Charentais Sea with new insights in soft-bottom macrofauna of the Marennes-Oleron Bay ArchiMer
De Montaudouin, Xavier; Sauriau, Pierre-guy; De Montaudouin, Xavier; Sauriau, Pierre-guy.
The catalogue of soft-bottom macrofauna in the Marennes-Oleron Bay (French Atlantic coast) has been updated from a benthic survey conducted in April-May 1995. 262 stations were selected using a stratified random strategy based on sediment types and bathymetric levels. 231 soft-bottom macrofauna species were identified. A synopsis of all available literature since the first local marine study published in 1710 by Antoine Ferchauld de Reaumur indicated that 60 benthic species were reported in the Marennes-Oleron Bay for the first time. The sampling effort, i.e. more than 1 station per km(2) and size of the sieving square mesh (1 mm), can partially explain these results. Most of the new recorded species were crustaceans (28 species) and polychaete annelids...
Tipo: Text Palavras-chave: Pertuis Charentais; Marennes Oleron Bay; Checklist; Species richness; Macrozoobenthos.
Ano: 2000 URL: https://archimer.ifremer.fr/doc/2000/publication-885.pdf
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Assemblage of chiropterans in a remnant of semideciduous seasonal forest in southern Brazil and latitudinal patterns of species diversity in the Atlantic Forest Mastozool. neotrop.
de S. Pires,Daniel Paulo; Marques,Rosane V; Cabral,Tiago C; de Lima,Camila S; Cademartori,Cristina V.
Observed and expected richness, capture success, diversity, dominance, evenness and the effect of latitude on the above variables at the regional level were evaluated with regard to the chiropteran fauna of a semideciduous seasonal forest remnant in the state of Rio Grande do Sul, southern Brazil. Sampling occurred between July 2008 and June 2010 using mist nets erected at ground level. So that chiropteran fauna could be described and compared to other studies in the Atlantic Rainforest throughout the 10°-30°S using multivariate regression. One hundred and sixteen specimens were captured, comprising 9 species and 3 families: Phyllostomidae, Vespertilionidae and Molossidae. Capture success was 0.0008 ind/m²h, with a diversity index (H’) of 1.623;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abundance; Atlantic Forest; Bats; Species richness.
Ano: 2014 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832014000200007
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Plant diversity and galling arthropod diversity searching for taxonomic patterns in an animal-plant interaction in the Neotropics Boletín de la Sociedad
de Souza Mendonça, Jr.,Milton.
Gall-inducers are a special guild of endophytic herbivores generating distinct structures known as galls. Gallers are species-specific, as the galls they induce: each gall morphotype is unique. The relationship between plants and gallers is close, and some of the hypotheses to explain galling diversity consider plants directly; others do not. Here I review current diversity hypotheses on galls and their hosts, adding ideas on the interpretation of galler host plant data. The example comes from an ongoing standardised inventory of galls and hosts in Rio Grande do Sul (RS) state, southern Brazil. The questions addressed here are whether: a) galls occur consistently on some plant taxa in different areas, b) these taxa are important for vegetation composition,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gall; Species richness; Plant taxon size hypothesis; Fabaceae; Myrtaceae; Asteraceae.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722007000200022
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Effects of Roads on Animal Abundance: an Empirical Review and Synthesis Ecology and Society
Fahrig, Lenore; Carleton University, Geomatics and Landscape Ecology Laboratory, Department of Biology; lfahrig@ccs.carleton.ca; Rytwinski, Trina; Carleton University, Geomatics and Landscape Ecology Laboratory, Department of Biology; trytwins@connect.carleton.ca.
We attempted a complete review of the empirical literature on effects of roads and traffic on animal abundance and distribution. We found 79 studies, with results for 131 species and 30 species groups. Overall, the number of documented negative effects of roads on animal abundance outnumbered the number of positive effects by a factor of 5; 114 responses were negative, 22 were positive, and 56 showed no effect. Amphibians and reptiles tended to show negative effects. Birds showed mainly negative or no effects, with a few positive effects for some small birds and for vultures. Small mammals generally showed either positive effects or no effect, mid-sized mammals showed either negative effects or no effect, and large mammals showed predominantly negative...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Environmental impact; Landscape connectivity; Mortality; Population density; Road network; Road density; Road effect zone; Road mitigation; Species distribution; Species richness; Traffic density; Traffic volume.
Ano: 2009
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Spatial pattern in species richness of demersal fish assemblages on the continental shelf of the northern Mediterranean Sea: a multiscale analysis ArchiMer
Gaertner, J; Bertrand, Jacques; Relini, G; Papaconstantinou, C; Mazouni, N; De Sola, L; Durbec, J; Jukic Peladic, S; Souplet, Arnauld.
The species richness pattern of groundfish species in the entire northern Mediterranean Sea was examined at 3 spatial scales: region, large biogeographical zone and basin. We analysed 1914 trawl hauls collected using a single sampling design in the trawlable areas of the continental shelves between the Strait of Gibraltar and the Strait of Dardanelles (from 36.3 to 45.7 degrees N and 5.3 degrees W to 28 E). Spatial pattern in species diversity was assessed using complementary methods (Chao2 estimates of total species richness, mean species richness and beta diversity). No matter which scale was used, the expected longitudinally decreasing trend in species richness, which has been widely described in previous studies, did not appear when comparing estimates...
Tipo: Text Palavras-chave: Lessepsian; Large scale; Mediterranean Sea; Groundfishes; Beta diversity; Species richness.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3569.pdf
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Formigas (Hymenoptera, Formicidae) Associadas a Ninhos de Cornitermes cumulans (Kollar) (Isoptera, Termitidae) no Cerrado do Planalto Central do Brasil Ciências Agrárias
Gallego-Ropero, María Cristina; Feitosa, Rodrigo Machado; Pujol-Luz, Jose Roberto.
Resumo. Com o objetivo de conhecer a fauna de formigas que coabita os cupinzeiros de Cornitermes cumulans (Kollar) no Cerrado sensu stricto do Brasil Central, foram realizadas coletas em 36 cupinzeiros em três localidades. Os cupinzeiros foram fragmentados e o material coletado foi armazenado em frascos com álcool a 80%. Apresentamos aqui uma lista das formigas associadas aos cupinzeiros de C. cumulans. Um total de 61 espécies distribuídas em nove subfamílias e 32 gêneros foi coletado. A subfamília Myrmicinae apresentou o maior número de gêneros (15) e de espécies (22). Estes resultados indicam que ninhos de cupins são importantes recursos de nidificação para várias espécies de formigas no Brasil Central. Abstract. In order to survey the ant fauna...
Tipo: Article Palavras-chave: Cupins; Inquilinos; Nidificação; Riqueza de espécies; Inquilines; Nesting resource; Species richness; Termites.
Ano: 2013 URL: http://hdl.handle.net/2315/268
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Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database ArchiMer
Gallon, Regis K.; Lavesque, Nicolas; Grall, Jacques; Labrune, Celine; Gremare, Antoine; Bachelet, Guy; Blanchet, Hugues; Bonifacio, Paulo; Bouchet, Vincent M. P.; Dauvin, Jean-claude; Desroy, Nicolas; Gentil, Franck; Guerin, Laurent; Houbin, Celine; Jourde, Jerome; Laurand, Sandrine; Le Duff, Michel; Le Garrec, Vincent; De Montaudouin, Xavier; Olivier, Frederic; Orvain, Francis; Sauriau, Pierre-guy; Thiebaut, Eric; Gauthier, Olivier.
This study aims to describe the patterns of soft bottom macrozoobenthic richness along French coasts. It is based on a collaborative database developed by the “Réseau des Stations et Observatoires Marins” (RESOMAR). We investigated patterns of species richness in sublittoral soft bottom habitats (EUNIS level 3) at two different spatial scales: 1) seaboards: English Channel, Bay of Biscay and Mediterranean Sea and 2) 0.5° latitudinal and longitudinal grid. Total observed richness, rarefaction curves and three incidence-based richness estimators (Chao2, ICE and Jacknife1) were used to compare soft bottom habitats species richness in each seaboard. Overall, the Mediterranean Sea has the highest richness and despite higher sampling effort, the English Channel...
Tipo: Text Palavras-chave: Zoobenthos; Species richness; Regional pattern; Latitudinal pattern; Soft-bottom; France.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00376/48769/49166.pdf
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Diversidad de la vegetación y características morfoedáficas de las riberas de arroyos pampeanos Ecología austral
Gantes,Patricia; Falco,Liliana; Sánchez Caro,Aníbal.
Las riberas son ecosistemas espacial y temporalmente heterogéneos que favorecen una alta diversidad, pero que se podrían ver afectadas por la intensificación de ciertas perturbaciones antrópicas. Con el propósito de aportar información de base, que permita evaluar los efectos sobre la biodiversidad de eventuales disturbios, se caracteriza la vegetación por sus grupos biológicos y se analizan tres aspectos: la diversidad a tres escalas (margen, tramo y cuenca), su relación con características topográficas y edáficas y los cambios asociados a la presencia de ganado. Se identificaron 130 taxa; entre ellas, Cynodon dactylon y Eleocharis spp. tuvieron una frecuencia cercana al 100% y fueron los de mayor cobertura. Se halló 51% de especies herbáceas perennes,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Riqueza específica; Grupos biológicos; Escalas espaciales; Species richness; Biological groups; Spatial scales.
Ano: 2017 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000100010
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Terrestrial mammals of the Jequitinhonha River basin, Brazil: a transition area between Atlantic Forest and Cerrado Mastozool. neotrop.
Geise,Lena; Pereira,Luciana G; Astúa,Diego; Aguieiras,Marcia; Lessa,Leonardo G; Asfora,Paulo H; Dourado,Francisco; Esberárd,Carlos E. L.
Here we present an extensive survey for non-volant mammals along the margins of the Jequitinhonha River, which represents a contact area between the Cerrado and Atlantic Forest biomes. Our data were ob­tained after 13 trapping expeditions (from 2005 to 2012) on both banks of the river, from its source to its mouth, enriched by data obtained from a literature review and voucher specimens deposited in six mammal collections. All collected specimens were identified through their karyotypes and/or morphology. We obtained data for 75 localities (34 at the rigth margin, 42 at the left margin; 30 in the Cerrado and 45 in the Atlantic Forest). We obtained voucher records for 91 species, ca. 17% of all known Brazilian terrestrial non-volant mam­mals. Our results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Barriers; Didelphimorphia; Karyotypes; Rodentia; Species richness.
Ano: 2017 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832017000100009
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Species richness and origin of the bryophyte flora of the Colombian Andes Naturalis
Gradstein, S.R.; Reenen, G.B.A. van; Griffin, D..
Based on data from the ECOANDES project, a phytogeographical analysis has been made of the bryophyte flora along the wet, foggy western slope (1000-4500 m) and the drier eastern slope (500-4500 m) of the Colombian Central Cordillera at the ‘Parque de los Nevados’. Species richness increases with altitude to the upper montane forest, which holds the largest diversity. Liverworts outnumber mosses in the upper submontane and montane forests on the western slope, but elsewhere, in drier environments, their number is lower and falls to below that of mosses. Furthermore, it appears that at lower altitudes, below 3000 m, wide-ranging tropical species prevail whereas narrowranging tropical species (andean and endemic element) and species of temperate origin are...
Tipo: Article / Letter to the editor Palavras-chave: Phytogeography; Species richness; Altitudinal zonation; Andes; Bryophytes.
Ano: 1988 URL: http://www.repository.naturalis.nl/record/535268
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