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	Provedor de dados ArchiMer (2) Neotropical Ichthyology (1) Autor Amaro,Ahyran (1) Coronel,Jorge (1) Juniper, Sk (1) Legendre, P (1) Massoth, G (1) Moore, Sw (1) Rodríguez-Olarte,Douglas (1) Sarrazin, Jozee (1) Taphorn B.,Donald C. (1) Mais... Palavra-chave Habitat characterization (3) Electronics (1) Fluid flow (1) Habitat (1) Hydrothermal vent ecology (1) In situ measurements (1) Index of Biotic Integrity (1) Instrumentation (1) Mosaic habitat (1) Multivariate analysis (1) National Park (1) Physical and chemical factors (1) Physical ecology (1) Species distribution (1) Statistical analyses (1) Substratum types (1) Sulfide edifice (1) Écologie physique (1) Électronique (1) Mais... Tipo do documento Text (2) Info:eu-repo/semantics/article (1) Ano 2006 (1) 1999 (2) País France (2) Brazil (1) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Datalogging instrument arrays: powerful yet inexpensive tools for recording the heterogeneous physical environment of coral reefs ArchiMer Moore, Sw. The physical structure of coral reefs, like that of rainforests and other spatially-complex ecosystems, modulates light, fluid flow, and other physical variables to create a spatially and temporally complex mosaic of microhabitats. Accurate and affordable methods for quantifying this spatio-temporal variation are required to address many basic and applied research questions related to the ecology and management of reefs. Recent advances in semiconductor electronics technology have made it easier and much less expensive to build small and reliable datalogging instruments, which can be deployed in arrays to record spatio-temporal patterns of ecologically-important variables. Suitable instruments are already commercially available for $100 (US) or less per... Tipo: Text Palavras-chave: Instrumentation; Habitat; Écologie physique; Électronique; Instrumentation; Habitat characterization; Physical ecology; Electronics. Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43592/44033.pdf Integrity of fluvial fish communities is subject to environmental gradients in mountain streams, Sierra de Aroa, north Caribbean coast, Venezuela Neotropical Ichthyology Rodríguez-Olarte,Douglas; Amaro,Ahyran; Coronel,Jorge; Taphorn B.,Donald C.. We examined physical habitat and fish assemblages in rivers of the Aroa Mountains (Venezuela) with different levels of environmental protection due to the creation of Yurubí National Park within the drainage. We developed an Index of Biotic Integrity (IBI) and evaluated it using principal components analysis (PCA) and canonical correspondence analysis (CCA). Tributary rivers were divided into classes according to their origin (protected by the park) and physical characteristics of each, including substrate. Fishes were captured using standardized electrofishing. Fish communities showed greater species richness in heterogeneous habitat and protected rivers but overall abundance was higher in unprotected and impacted rivers. The IBI was sensitive to these... Tipo: Info:eu-repo/semantics/article Palavras-chave: Index of Biotic Integrity; Habitat characterization; Multivariate analysis; National Park. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000300003 Physical and chemical factors influencing species distributions on hydrothermal sulfide edifices of the Juan de Fuca Ridge, northeast Pacific ArchiMer Sarrazin, Jozee; Juniper, Sk; Massoth, G; Legendre, P. This study examines relationships between hydrothermal vent species and their surrounding physical and chemical environment on 2 high-temperature sulfide edifices of the Juan de Fuca Ridge (northeast Pacific). Video imagery and in situ temperature and chemical information were acquired during 2 remotely operated vehicle (ROV) dive programs in 1993 and 1995, for a total of 78 scans. Statistical analyses of environmental and faunal data reveal a heterogeneous distribution (cor respondence analyses) of hydrothermal species and demonstrate a significant influence of local physical and chemical conditions on species distributions (canonical correspondence analyses). Results confirm the importance of hydrogen sulfide to the distribution of vent species as well... Tipo: Text Palavras-chave: Hydrothermal vent ecology; Physical and chemical factors; In situ measurements; Habitat characterization; Species distribution; Sulfide edifice; Statistical analyses; Fluid flow; Substratum types; Mosaic habitat. Ano: 1999 URL: http://archimer.ifremer.fr/doc/00280/39113/37666.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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