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Akademický článek

Omnivory and resource - sharing in nutrient - deficient Rio Negro waters: stabilization of biodiversity? Omnivoria e repartição de recursos em águas pobres em nutrientes da Bacia do Rio Negro

Autor: Ilse Walker

Publikováno v: Acta Amazonica, Vol 39, Iss 3, Pp 617-626 (2009)

Amazonian biodiversity is notorious, this is also valid for the fauna of the mineral-deficient waters of the Rio Negro System. Some 25 years of research on the benthic fauna of Central Amazonian streams resulted in species-rich foodwebs with a high d

Externí odkaz: https://doaj.org/article/bbc2b26a55d84d3fbddec78d7cb5d4bf

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Akademický článek

The food spectrum of the cardinal - tetra (Paracheirodon axelrodi, Characidae) in its natural habitat Estratégias alimentares do cardinal-tetra (Paracheirodon axelrodi, Characidae) em seu ambiente natural

Autor: Ilse Walker

Publikováno v: Acta Amazonica, Vol 34, Iss 1, Pp 69-73 (2004)

The cardinal tetra (Paracheirodon axelrodi) is the most intensively commercialized ornamental fish from the Rio Negro Basin (Amazonas State, Brasil). Analysis of the stomach and gut contents of fish caught in their natural habitats show conclusively

Externí odkaz: https://doaj.org/article/299319a0c30f4a288d92cfda2417ec50

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Akademický článek

Efeitos da ocupação urbana sobre a macrofauna de invertebrados aquáticos de um Igarapé da cidade de Manaus/AM - Amazônia Central

Autor: Sérgio Ernani Nogueira CLETO FILHO, Ilse WALKER

Publikováno v: Acta Amazonica, Vol 31, Iss 1, Pp 69-89 (2001)

A qualidade da água e a fauna composta pelos macroinvertebrados aquáticos do Igarapé do Mindú, o qual tem suas nascentes em áreas florestadas e atravessa a cidade de Manaus (Amazonas, Brasil), foram estudadas de 1993 a 1995. Desmatamentos e ocup

Externí odkaz: https://doaj.org/article/b8c358f8112e4e9fa682e9c6ac444f42

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Akademický článek

Observations on aquatic Macrophyte Dynamics In the Reservoir Of The Balbina Hydroelectric Powerplant, Amazonas State, Brazil

Autor: Ilse WALKER, Roberto MIYAI, M. D. Amaral de MELO

Publikováno v: Acta Amazonica, Vol 29, Iss 2, Pp 243-265 (1999)

Between 1991 and 1995 aquatic macrophyte composition was observed in the lower part of the reservoir of the hydroelectric power plant of Balbina (Amazonas, Brazil). After closure of the dam in 1987, vegetation cover - mostly Eichhornia crassipes - wa

Externí odkaz: https://doaj.org/article/663a67a927e545b0865bb182458d4b58

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Akademický článek

The thecamoebae (Protozoa, Rhizopoda) of small Amazonian forest streams and their possible use as indicator organisms for waterquality

Autor: Ilse Walker

Publikováno v: Acta Amazonica, Vol 12, Iss suppl 3, Pp 79-86 (1982)

Abstract The thecaboemae fauna of seven central amazonian forest streams — among them the stream of the "Bacia Modelo" — was analised. 129 morphotypes are shortly characterized in a "list of morphotypes" with accompanying figures (Plates 1-7); 39

Externí odkaz: https://doaj.org/article/76eb54197a80443da13a526f0b14a5cf

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Akademický článek

Adaptation of constant effort sampling and of removal trapping for the estimation of populations of microscopic organisms in dense substrates ()

Autor: Ilse Walker, Maryolanda Trindade Lages

Publikováno v: Acta Amazonica, Vol 10, Iss 3, Pp 535-544 (1980)

Abstract Large numbers of thecamoebae are found in the sand and detritus substrate of small streams in the Amazonian terra firme forest. Their relative population densities can be determined by searching and counting thecae under a dissecting microsc

Externí odkaz: https://doaj.org/article/fbed66453478407ab8daca1b4003ddf3

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Akademický článek

Rede de alimentação de invertebrados das águas pretas do sistema rio Negro 1. Observações sobre a predação de urna Ameba do tipo Ameba discoides.

Autor: Ilse Walker

Publikováno v: Acta Amazonica, Vol 8, Iss 3, Pp 423-438 (1978)

Resumo Observação de pequenos ecossistemas estabelecidos quase naturalmente no laboratório a partir de material coletado em "habitats" específicos do rio, permitiu construir uma rede alimentar da Amoeba (discoides), um predador voraz proveniente

Externí odkaz: https://doaj.org/article/6d8c1c75442742b8b678a40690984e87

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The benthic litter-dwelling macrofauna of the Amazonian forest stream Tarumã-Mirím: patterns of colonization and their implications for community stability

Autor: Ilse Walker

Publikováno v: Hydrobiologia. 291:75-92

Between 1983 and 1988 a total of 928 litter-filled baskets (1.8 1 volume), exposed for various periods on a stream litterbank and in its vicinity, collected 2703 individuals of 122 macrofaunal species, excluding chironomids. Species abundance was ana

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::64ad03dfc8db68a9505bc89090eabaf4
https://doi.org/10.1007/bf00044437

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Life history traits of shrimps (Decapoda: Palaemonidae) of Amazonian inland waters and their Phylogenetic interpretation

Autor: Ilse Walker

Publikováno v: Studies on Neotropical Fauna and Environment. 27:131-143

Amazonian shrimps (Decapoda, Palaemonidae) of several genera from the generally nutrient‐poor, acid waters of the Rio Negro basin show two different breeding patterns: in the annually inundated (Jan./Feb. to Sept./Oct.) lowland forest (= “igapo")

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d42957798a65d71495359af3a0eacce2
https://doi.org/10.1080/01650529209360873

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Omnivoria e repartição de recursos em águas pobres em nutrientes da Bacia do Rio Negro

Autor: Ilse Walker

Publikováno v: Acta Amazonica, Volume: 39, Issue: 3, Pages: 617-626, Published: SEP 2009
Repositório Institucional do INPA
Instituto Nacional de Pesquisas da Amazônia (INPA)
instacron:INPA
Acta Amazonica v.39 n.3 2009
Acta Amazonica

A biodiversidade do Amazonas é notório e isto também é válido para as águas pobres em nutrientes da bacia do Rio Negro. Uma pesquisa de 25 anos da fauna béntica de igarapés da Amazônia Central resultou em redes alimentares caraterizadas por

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03bfa5041aa510a63bf29656383f785b
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000300017&lng=en&tlng=en

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