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| Registros recuperados: 115 | |
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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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| Cassenote,Sheila; Silva,Pedro Giovâni da; Mare,Rocco Alfredo Di; Paladini,Andressa. |
| ABSTRACT Dung beetle species were collected between May 2016 and July 2017 with pitfall traps baited with human feces in four Atlantic Forest sites with different levels of disturbance in the state of Rio Grande do Sul, southern Brazil. We sampled 5,535 individuals belonging to 46 species. Canthidium aff. trinodosum (20.71%), Eurysternus parallelus Castelnau, 1840 (14.82%), Onthophagus catharinensis Paulian, 1936 (12.09%), Scybalocanthon nigriceps (Harold, 1868) (7.61 %), Eurysternus caribaeus (Herbst, 1789) (7.49%), and Canthon rutilans cyanescens Harold, 1868 (7.22%) were the most abundant species, which represented 70% of the individuals sampled. Moreno Fortes Biological Reserve had the higher richness and Morro do Cerrito the higher abundance, while... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Species diversity; Subtropical climate; Temporal patterns. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100235 |
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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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| 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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| Gaertner, J; Bertrand, Jacques; De Sola, L; Durbec, J; Ferrandis, E; Souplet, Arnauld. |
| The spatial structure of demersal fish assemblages on the continental shelf of the NW Mediterranean Sea was examined on a large scale between the Straits of Gibraltar and the Gulf of Lions. In contrast to its predominant role in the spatial distribution of species composition, described worldwide, it seems depth has only a limited effect on the distribution patterns of the total abundance and diversity of demersal fishes. In addition, evidence is provided for the division of the whole study area into 3 geographical fish assemblages. The influence of Atlantic inputs and the semi-permanent Almena-Oran hydrographic front play a key role in defining the Alboran Sea as a specific fish fauna area. Moreover, the clear differentiation between 2 distinct... |
| Tipo: Text |
Palavras-chave: Mediterranean Sea; Management units; Species diversity; Assemblage structure; Demersal fishes. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-3623.pdf |
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| Granger, Victoria; Bez, Nicolas; Fromentin, Jean-marc; Meynard, Christine; Jadaud, Angelique; Merigot, Bastien. |
| Mapping diversity indices, that is estimating values in all locations of a given area from some sampled locations, is central to numerous research and applied fields in ecology. Two approaches are used to map diversity indices without including abiotic or biotic variables: (i) the indirect approach, which consists in estimating each individual species distribution over the area, then stacking the distributions of all species to estimate and map a posteriori the diversity index, (ii) the direct approach, which relies on computing a diversity index in each sampled locations and then to interpolate these values to all locations of the studied area for mapping. For both approaches, we document drawbacks from theoretical and practical viewpoints and argue... |
| Tipo: Text |
Palavras-chave: Interpolation methods; Map; Quadratic entropy; Spatial statistics; Species diversity; Species richness; Beta-diversity. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00257/36819/37060.pdf |
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| Hummel, Herman; Van Avesaath, Pim; Wijnhoven, Sander; Kleine-schaars, Loran; Degraer, Steven; Kerckhof, Francis; Bojanic, Natalia; Skejic, Sanda; Vidjak, Olja; Rousou, Maria; Orav-kotta, Helen; Kotta, Jonne; Jourde, Jerome; Pedrotti, Maria Luiza; Leclerc, Jean-charles; Simon, Nathalie; Rigaut-jalabert, Fabienne; Bachelet, Guy; Lavesque, Nicolas; Arvanitidis, Christos; Pavloudi, Christina; Faulwetter, Sarah; Crowe, Tasman; Coughlan, Jennifer; Benedetti-cecchi, Lisandro; Dal Bello, Martina; Magni, Paolo; Como, Serena; Coppa, Stefania; Ikauniece, Anda; Ruginis, Tomas; Jankowska, Emilia; Weslawski, Jan Marcin; Warzocha, Jan; Gromisz, Slawomira; Witalis, Bartosz; Silva, Teresa; Ribeiro, Pedro; Fernandes De Matos, Valentina Kirienko; Sousa-pinto, Isabel; Veiga, Puri; Troncoso, Jesus; Guinda, Xabier; Juanes De La Pena, Jose Antonio; Puente, Araceli; Espinosa, Free; Perez-ruzafa, Angel; Frost, Matt; Mcneill, Caroline Louise; Peleg, Ohad; Rilov, Gil. |
| Within the COST action EMBOS (European Marine Biodiversity Observatory System) the degree and variation of the diversity and densities of soft-bottom communities from the lower intertidal or the shallow subtidal was measured at 28 marine sites along the European coastline (Baltic, Atlantic, Mediterranean) using jointly agreed and harmonized protocols, tools and indicators. The hypothesis tested was that the diversity for all taxonomic groups would decrease with increasing latitude. The EMBOS system delivered accurate and comparable data on the diversity and densities of the soft sediment macrozoobenthic community over a large-scale gradient along the European coastline. In contrast to general biogeographic theory, species diversity showed no linear... |
| Tipo: Text |
Palavras-chave: Soft sediment; Benthos; Species diversity; Densities; Harmonization of methods; European cline; Biogeography; Latitudinal diversity gradient (LDG). |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00376/48675/49010.pdf |
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| Trenkel, Verena; Pinnegar, John; Rochet, Marie-joelle; Rackham, Brian. |
| Choice of sampling method and survey period can have an important impact on the perception of the structure and dynamics of an ecological community. For the Celtic Sea fish assemblage we compared data obtained by three different trawl surveys: an autumn groundfish survey with a GOV trawl, and a spring and an autumn groundfish survey, both carried out with a Portuguese high-headline trawl. Time-series of abundance estimates were not consistent among surveys for all species and were generally very noisy. An analysis of variance components showed that the sampling method contributed more to the variance in abundance estimates compared to survey period, interannual variability, or even sampling variance. Overall community assessments based on indicators such... |
| Tipo: Text |
Palavras-chave: Trawl; Survey; Species diversity; Size spectrum; Celtic Sea; Abundance. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/2004/publication-899.pdf |
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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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| Registros recuperados: 115 | |
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