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| Registros recuperados: 124 | |
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| Chao, Anne; Chiu, Chun-huo; Villéger, Sébastien; Sun, I-fang; Thorn, Simon; Lin, Yi-ching; Chiang, Jyh-min; Sherwin, William B.. |
| Based on the framework of attribute diversity (a generalization of Hill numbers of order q), we develop a class of functional diversity measures sensitive not only to species abundances but also to trait‐based species‐pairwise functional distances. The new method refines and improves on the conventional species‐equivalent approach in three areas: (1) the conventional method often gives similar values (close to unity) to assemblages with contrasting levels of functional diversity; (2) when a distance metric is unbounded, the conventional functional diversity depends on the presence/absence of other assemblages in the study; (3) in partitioning functional gamma diversity into alpha and beta components, the conventional gamma is sometimes less than alpha. To... |
| Tipo: Text |
Palavras-chave: Attribute diversity; Diversity decomposition; Functional (dis)similarity; Functional beta diversity; Functional diversity; Hill numbers; Quadratic entropy; Species diversity; Species traits; Trait diversity. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60082/63408.pdf |
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| PEREIRA, N. W. V.; VENTURIN, N.; MACHADO, E. L. M.; SCOLFORO, J. R. S.; MACEDO, R. L. G.; OLIVEIRA, M. V. N. d'.. |
| Realizou-se o levantamento do compartimento arbóreo em uma área sujeita a manejo sustentado, em uma floresta ombrófila aberta e floresta densa, situada em Lábrea, Amazonas, com o objetivo de caracterizar a composição florística e fisionômica, a diversidade da área, o padrão de distribuição das espécies e verificar as possíveis variações dos padrões de distribuição destas espécies arbóreas em função deste manejo. Para a realização deste trabalho a área foi dividida em 18 unidades primarias com 30 ha cada uma, sendo que destas, foram selecionadas aleatoriamente, três unidades, onde foram alocadas dez unidades secundárias (parcelas), de 100 x 100 m (1 ha), em cada unidade primária, no total de 30 ha para melhor controle das avaliações. Cada unidade secundária... |
| Tipo: Artigo de periódico |
Palavras-chave: Manejo florestal; Levantamento florestal; Manejo sustentado; Diversidade de espécies; Floresta ombrófila aberta; Floresta densa; Lábrea (AM); Amazonas; Amazônia Ocidental; Diversidad de especies; Manejo forestal; Prospecciones forestales.; Espécie florestal; Floresta tropical; População de planta.; Forest management; Amazonia; Species diversity; Forest surveys.. |
| Ano: 2005 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/506322 |
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| Oliveira,Lukiel dos Santos; Andrade,Bianca Ott; Boldrini,Ilsi Iob; Moço,Maria Cecilia de Chiara. |
| ABSTRACT Aquatic ecosystems support species diversity, and knowledge of plant communities is essential for wetland conservation programs. This study provides a checklist of aquatic vascular plants of South Brazil and establishes their floristic affinities with bordering South America phytogeographical domains. The checklist was based on 52 sources, including 35 floristic lists, 17 regional taxonomic studies, and information from an electronic database on wetlands of South Brazil. Floristic similarities with published checklists for neighbouring regions were assessed. A total of 780 species distributed in 277 genera and 85 families of vascular plants were reported for South Brazil. Families with higher species richness were Cyperaceae (128), Poaceae (102),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floristic; Macrophyte distribution; Plant diversity; Species diversity; Wetland conservation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400709 |
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| Revelo, W.. |
| Durante el 2009 (excepto mayo, agosto y septiembre), se analizaron un total de 3 772 especímenes de peces conformados por 16 especies, predominando la dica con 1561 individuos (42,3%), las menos capturadas fueron róbalo y chame con un individuo cada una (0,03%). La proporción de sexo macho hembra, talla promedio de captura y media de madurez sexual de las principales especies de peces fue: dama (1: 1,16; 23,7 y 20 cm LT), dica (1: 1,15; 17,3 y 16 cm LT), guanchiche (1: 1,2; 29 y 20 cm LT), ratón (1: 1,25; 23,5 y 19 cm LT) y bocachico (1:1,06; 21,6 y 20 cm LT). En los estadios de madurez sexual, la mayoría de las especies se encontraron en estadio I y II correspondientes a individuos hembras inmaduras; sin embargo, para el guanchiche predominaron las... |
| Tipo: Journal Contribution |
Palavras-chave: Rivers; Species diversity; Sexual maturity; Growth rate; Catch composition; Freshwater fish. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4790 |
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| Bawa, Kamaljit; University of Massachusetts; kamal.bawa@umb.edu; Rose, Joseph; ; joesph.rose@umb.edu; Ganeshaiah, K.N.; ; kng@vsnl.com; Barve, Narayani; ; narayani@atree.org; Kiran, M.C.; ; kiran@atree.org; Umashaanker, R.; ; rus@vsnl.com. |
| We demonstrate for the first time the potential use of satellite imagery to characterize areas of high and low species richness of trees in tropical forests. Our studies, conducted in the Biligiri Rangaswamy hills in the Western Ghats, India, show a high positive correlation between species richness and the Normalized Difference Vegetation Index (NDVI), which is an index of green biomass. We discuss the application of NDVI values for biodiversity assessment and monitoring, as well as for conservation planning. The NDVI is a rough measure of green biomass. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Western Ghats; Species diversity; Tropical deforestation. |
| Ano: 2002 |
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| Sócola, J.. |
| Durante la VIII Expedición Antártica se realizaron observaciones diarias en Punta Fort Williams, con el objetivo de determinar las especies de aves presentes, el número de especies que anidan en este sitio y la población existente de cada una de ellas. Según los resultados obtenidos se encontraron 10 especies. Macronectes giganteus (Petrel gigante del sur), Catharacta lonnbergi (Skua subantártica), Catharacta maccormicki (Skua antártica), Larus dominicanus (Gaviota dominicana), Oceanites oceanicus (Golondrina de mar común), Sterna vitata (Gaviotín antártico), Pysgoscelis papua (Pingüino papua), Pysgoscelis antártica (Pingüino barbiquejo), Daption capense (Petrel del cabo) y Phalacrocorax atriceps (Cormorán antártico), de las cuales las cinco primeras... |
| Tipo: Journal Contribution |
Palavras-chave: Marine birds; Species diversity; Species diversity; Http://aims.fao.org/aos/agrovoc/c_33954. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/3823 |
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| Fiera,Cristina. |
| The objective of this work was to evaluate the effects of pollutants on the abundance and diversity of Collembola in urban soils. The research was carried out in three parks (Cişmigiu, Izvor and Unirea) in downtown Bucharest, where the intense car traffic accounts for 70% of the local air pollution. One site in particular (Cişmigiu park) was highly contaminated with Pb, Cd, Zn and Cu at about ten times the background levels of Pb. Collembola were sampled in 2006 (July, September, November) using the transect method: 2,475 individuals from 34 species of Collembola were collected from 210 samples of soil and litter. Numerical densities differed significantly between the studied sites.The influence of air pollutants on the springtail fauna was visible at the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metals; Soil contamination; Species diversity; Urban parks. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800010 |
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| Olu, Karine; Cordes, Erik E.; Fisher, Charles R.; Brooks, James M.; Sibuet, Myriam; Desbruyeres, Daniel. |
| Like hydrothermal vents along oceanic ridges, cold seeps are patchy and isolated ecosystems along continental margins, extending from bathyal to abyssal depths. The Atlantic Equatorial Belt (AEB), from the Gulf of Mexico to the Gulf of Guinea, was one focus of the Census of Marine Life ChEss (Chemosynthetic Ecosystems) program to study biogeography of seep and vent fauna. We present a review and analysis of collections from five seep regions along the AEB: the Gulf of Mexico where extensive faunal sampling has been conducted from 400 to 3300m, the Barbados accretionary prism, the Blake ridge diapir, and in the Eastern Atlantic from the Congo and Gabon margins and the recently explored Nigeria margin. Of the 72 taxa identified at the species level, a total... |
| Tipo: Text |
Palavras-chave: Gulf of mexico; Barbados accretionary prism; Mussel bathymodiolus childressi; Hydrothermal vent communities; Deep sea vent; Spatial distribution; Family veiscomyidae; Dispersal barriers; Hydrocarbon seeps; Species diversity. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00011/12207/8975.pdf |
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| SOUSA, B. O.; OLIVEIRA, M. S. B.; TAVARES-DIAS, M.. |
| The aim of this study was to investigate the community of metazoan parasites in Hemibrycon surinamensis from the Matapi River, State of Amapá, Brazil. Among the 31 examined fish, 77.4 % were parasitized by Jainus hexops, Tereancistrum ornatus (Monogenea), Contracaecum sp. (Nematoda), Clinostomus marginatum and Posthodiplostomum sp. (Digenea). However, the dominance was of monogeneans J. hexops and T. ornatus, and among the endoparasites, the predominance was of species at the larval stage. The parasites showed random dispersion. Brillouin diversity index varied from 0 to 0.9, evenness from 0 to 0.7 and species richness from 0 to 3 parasites per host. Low levels of parasitic infection were observed and discussed. The results indicate that this intermediate... |
| Tipo: Artigo de periódico |
Palavras-chave: Monogeneans; Peixe de Água Doce; Parasito de Animal; Freshwater fish; Ectoparasites; Species diversity. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110912 |
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| Tapia, M.E.. |
| This work includes the composition and distribution of phytoplankton in the coastal region. For this purpose were established 23 stations on three regions and six sections divided from the northern region of Esmeraldas to the south of Puerto Bolívar, this work was carried out at the Research Vessel Orión in december 2008. The greater diversity of the phytoplankton community in the surface layer was observed in the Central Region, Specifically in section 4 with a total of 84 species, highlighting the dominant species of diatoms as Rhizosolenia stolterfothii, Thalasssiosira subtilis, R. imbricata, Proboscia alata, Chaetoceros affinis, and in the group there were abundant dinoflagellates Gonyaulax poledra and Goniodoma polyedricum, characteristics of the... |
| Tipo: Journal Contribution |
Palavras-chave: Composition; Distribution; Phytoplankton; Biological production; Species diversity. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5752 |
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| Caballero, H.; Alcolado, P.M.; Semidey, A.. |
| Coral reef condition north of the Havanan provinces (NW Cuba), an area with variable influence from human settlements and runoff, was assessed using the AGRRA methodology’s benthic biological indicators: live coral cover, coral density, maximum colony diameter, old and recent coral mortality, coral recruitment, Diadema antillarum density, and macroalgae cover. Coral communities at 11 reef crest and 22 forereef sites were sampled during 2004. The Shannon heterogenety and Pielou evenness indices were calculated. A total of 33 species of coral, larger than 10 cm in maximum diameter, were identified. The biological indicators analyzed showed significant differences among sites, which suggest a marked heterogeneity in environmental conditions along the study... |
| Tipo: Journal Contribution |
Palavras-chave: Species diversity; Abundance; Coral reefs; Coral reefs; Species diversity; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3521 |
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| Fuentes Reines, Juan M.; Zoppi de Roa, Evelyn; Morón, Eliana; Gámez, Dáninso; López, Carlos. |
| Se analizaron 108 muestras recolectadas entre marzo y noviembre de 2009 provenientes de macrófitas y aguas abiertas de la costa oriental de la Ciénaga Grande de Santa Marta, adyacente a la desembocadura del río Sevilla, departamento del Magdalena. El mayor número de especies se registró en la zona de macrófitas. Este es el primer registro acerca de la existencia de cladóceros en esta región. Se encontró un total de 36 especies, de las cuales, ocho (Guernella raphaelis, Ilyocryptus plumosus, Moina eugeniae, Kurzia polyspina, K. media, Oxyruella longicaudis y O. tenuicaudis) son nuevos registros para Colombia. Además se hace una breve descripción de todas las especies y su distribución geográfica. |
| Tipo: Journal Contribution |
Palavras-chave: Crustaceans; Species diversity; New records. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4435 |
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| Registros recuperados: 124 | |
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