Fish communities along environmental gradients in a system of tropical streams

Angermeier, Paul L.; Karr, James R.

doi:10.1007/978-94-015-7682-6_3

Cited by 174 publications

(217 citation statements)

References 37 publications

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“…The interpretation for this apparent disparity is that, despite the continuous recruitment of juveniles throughout the year, a well documented life-history strategy for headwater stream fishes (Schlosser 1982, Garutti 1989, the reproduction must be increased and the mortality rate should be smaller during the wet season probably due to a higher availability of critical resources (food and shelter probably). The pattern of higher food availability and shelter during the wet season is cited both for temperate (Schlosser 1982) and tropical streams (Angermeier & Karr 1983, Lowe-McConnell 1987. Thus, in the studied stream reproduction throughout the year with the hypothesized higher reproduction and juveniles survival rates during the wet season should play an important factor in the maintenance of the fish community.…”

Section: Seasonalitymentioning

confidence: 81%

“…It is well known that substrate, depth and current are some of the most important physical features determining the distribution of fishes in stream communities (Sheldon 1968, Gorman & Karr 1978, Schlosser 1982, Angermeier & Karr 1983, Angermeier & Schlosser 1989) and the combination of such environmental features, producing a mosaic of microhabitats can explain the downstream increase in species richness (Gorman & Karr 1978). In the Córrego São Carlos, downstream addition of species seems to be closely related with the progressive increase in microhabitat diversity.…”

Section: Longitudinal Distribution and Microhabitatrelated Diversitymentioning

confidence: 99%

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Fish assemblage structure in a first order stream, southeastern Brazil: longitudinal distribution, seasonality, and microhabitat diversity

Casatti

2005

Biota Neotrop.

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This study was carried out on a first order stream in the Morro do Diabo State Park, southeastern Brazil. Three equidistant stream stretches -upper, middle, and lower -were chosen for underwater observations and fish collections that were performed in the dry (June and September 2000) and wet seasons (December 2000 and March 2001). Of the 18 fish species documented, 11 were considered resident year round. Phalloceros caudimaculatus, Hypostomus nigromaculatus, Hisonotus francirochai, Trichomycterus diabolus, and Hypostomus ancistroides represented 90% of the collected specimens. The highest richness and abundance occurred during the wet season. In general, the longitudinal addition of species follows the addition of microhabitats. Sexually mature individuals were present throughout the year for the majority of the species, which suggests broad reproductive activity. However, given that most juveniles specimens were collected during the wet season, it is hypothesized that reproduction and survival rates must be higher during this season due to higher availability of critical resources, most probably food and shelter. ResumoEste estudo foi conduzido em três trechos -superior, médio e inferior -de um riacho de primeira ordem no Parque Estadual Morro do Diabo, sudeste do Brasil. Observações subaquáticas a partir de mergulho livre e coletas foram realizadas na estação seca (junho e setembro de 2000) e chuvosa (dezembro de 2000 e março de 2001). Das 16 espécies documentadas, 11 foram residentes ao longo das observações. Phalloceros caudimaculatus, Hypostomus nigromaculatus, Hisonotus francirochai, Trichomycterus diabolus e Hypostomus ancistroides representaram 90% do total de indivíduos amostrados. A maior riqueza e abundância ocorreram durante a estação chuvosa. Em geral, a adição longitudinal de espécies seguiu a adição de micro-hábitats. Indivíduos sexualmente maduros foram encontrados ao longo do ano para a maioria das espécies, o que sugere prolongada atividade reprodutiva. Contudo, visto que a maioria dos jovens foi coletada na estação chuvosa, é provável que neste período ocorra um incremento de atividade reprodutiva, em razão de maior disponibilidade de recursos críticos, principalmente abrigos e alimentos. Palavras-chave:

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Section: Seasonalitymentioning

confidence: 81%

Section: Longitudinal Distribution and Microhabitatrelated Diversitymentioning

confidence: 99%

Fish assemblage structure in a first order stream, southeastern Brazil: longitudinal distribution, seasonality, and microhabitat diversity

Casatti

2005

Biota Neotrop.

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“…However, fish community structure is also thought to be influenced by biotic and abiotic factors, which operate and interact on various spatial and temporal scales (Angermeier and Winston, 1998;Matthews, 1998). On a regional scale, physical characteristics, such as stream size (Angermeier and Karr, 1984), water velocity (Mendonça et al, 2005), depth (Angermeier and Karr, 1984;Martin-Smith, 1998), and habitat diversity (Gorman and Karr 1978;Angermeier and Schlosser, 1989), or physico-chemical properties, such as electrical conductivity (Taylor et al, 1993;Mérigoux et al, 1998) and pH (Townsend et al, 1983), have also been considered to be factors that govern the occurrence and distribution of fish species.…”

Section: Introductionmentioning

confidence: 99%

Effects of isolation and environmental variables on fish community structure in the Brazilian Amazon Madeira-Purus interfluve

et al. 2013

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Due to the existence of terrestrial barriers to freshwater fish dispersion, it is believed that its distribution is strongly associated with historical factors related to the formation of the habitats they occupy. By the other hand, some studies reveal the influence of abiotic conditions (such as size of water bodies, pH, conductivity) on the composition of fish fauna occurring in small streams. This study aimed to investigate whether drainage basins, because catchment boundaries are potential barriers to fish dispersion, or the physical structure and physico-chemical characteristics of water have a greater influence on fish community structure in small streams. We sampled 22 streams belonging to five drainage basins in the Madeira-Purus interfluve. Fish were caught with dip nets and a small trawl, and data were simultaneously obtained on structural characteristics of the streams and physico-chemical characteristics of the water. Community composition was analyzed using Non-Metric Multidimensional Scaling (NMDS), and variables related to structural and physico-chemical characteristics were summarized by Principal Component Analysis (PCA). Two explanatory models relating faunal composition to environmental factors were constructed: the first using only continuous variables and the second including the drainage basin as a categorical variable. The Akaike Information Criterion (AIC) and AIC weight were used to select the best model. Although structural and physico-chemical variables significantly contributed to explaining faunal composition, the model including the drainage basin was clearly the better of the two models (more than 90% support in the data). The importance of drainage basins in structuring fish communities in streams may have significant consequences for conservation planning in these environments.Keywords: Ichthyofauna, fish ecology, physical variables, chemical variables, western Amazon. Efeito do isolamento e das variáveis ambientais na estrutura de comunidades de peixes do interflúvio Madeira-Purus na Amazônia brasileira ResumoDevido à existência de barreiras terrestres à dispersão de peixes de água doce, acredita-se que sua distribuição é fortemente associada a fatores históricos relacionados à formação dos habitats que ocupam. Por outro lado, alguns estudos revelam a influência de condições abióticas (tais como o tamanho do corpo d'água, pH, condutividade) na composição da fauna ictiíca de rios de pequena ordem. Este trabalho teve como objetivo investigar se bacias hidrográficas, cujo divisor de águas representa uma potencial barreira para a dispersão dos peixes, ou a estrutura física e características físico-químicas da água têm maior efeito sobre a estrutura de comunidades de peixes de riachos de pequena ordem.

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“…Wallace et al (1988), who compared brooks with and without riverside vegetation in North Carolina (USA), also observed that invertebrates were more abundant in those without vegetation. Hawkins et al (1983), Angermeier and Karr (1983) e Wallace et al (1988) have proposed that the higher numbers of macroinvertebrates in streams lacking riparian vegetation may be attributed to the increased availability of food due to high levels of primary production by algae.…”

Section: Discussionmentioning

confidence: 99%

Macroinvertebrates in low-order streams in two fragments of Atlantic Forest in different states of conservation, in the State of São Paulo (Brazil)

Paula

Fonseca-Gessner

2010

Braz. J. Biol.

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The presence of a riparian forest is one of the main factors that act directly on the ecology of a fluvial system, and the relation of the forest and the lotic environments might have an important influence on the distribution of the macroinvertebrates. In this context, the benthic macroinvertebrate communities in four low-order streams in São Paulo (Brazil) were analysed, with the aim of assessing the state of recovery of the surrounding forest fragments. The benthic organisms were sampled in the winter, a period of low rainfall. Of the 6,331 specimens of macroinvertebrates collected, 124 taxa belonging to 48 families were identified. The results showed greater diversity in the Canchim Farm streams and greater abundance in the Lake Park streams. Cluster analysis showed that the stream Canchim distanced itself from the others, being considered reference.Keywords: conservation, recovery of riparian forest, environmental monitoring, low-order streams. Macroinvertebrados em córregos de baixa ordem em dois fragmentos de Mata Atlântica em diferentes estados de conservação, no Estado de São Paulo (Brasil) ResumoA presença da mata ripária é um dos principais fatores que atuam diretamente na ecologia de um sistema fluvial, e a relação da mata e o ambiente lótico pode ter influência importante na distribuição dos macroinvertebrados. Neste contexto, as comunidades de macroinvertebrados bentônicos de quatro córregos de baixa ordem situados no interior do Estado de São Paulo foram estudadas, visando avaliar as condições de recuperação de um fragmento de mata. Os macroinvertebrados foram amostrados no período de inverno com baixa precipitação de chuva. Dos 6.331 espécimes de macroinvertebrados coletados, foram identificados 124 táxons distribuídos em 48 famílias. Os resultados indicaram maior diversidade nos córregos da fazenda Canchim e maior abundância nos córregos do Parque do Lago. A análise de agrupamento mostrou que o córrego Canchim se distanciou dos demais, sendo considerado referência.Palavras-chave: conservação, recuperação de mata ciliar, monitoramento ambiental, córregos de baixa ordem.

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Fish communities along environmental gradients in a system of tropical streams

Cited by 174 publications

References 37 publications

Fish assemblage structure in a first order stream, southeastern Brazil: longitudinal distribution, seasonality, and microhabitat diversity

Fish assemblage structure in a first order stream, southeastern Brazil: longitudinal distribution, seasonality, and microhabitat diversity

Effects of isolation and environmental variables on fish community structure in the Brazilian Amazon Madeira-Purus interfluve

Macroinvertebrates in low-order streams in two fragments of Atlantic Forest in different states of conservation, in the State of São Paulo (Brazil)

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