Discontinuity in fish assemblages across an elevation gradient in a southern Appalachian watershed, USA

Robinson, Jason L.; Rand, Peter S.

doi:10.1111/j.1600-0633.2005.00063.x

Cited by 29 publications

(20 citation statements)

References 35 publications

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“…This could reflect the natural longitudinal distribution of fish species in the study catchments, where higher temperatures downstream allow for the co-occurrence of more species, even within a relatively small altitudinal range. Indeed, the longitudinal pattern of increasing fish species richness is commonly observed in streams and rivers in both temperate and Mediterranean catchments [66], [67], [68], [69].…”

Section: Discussionmentioning

confidence: 99%

Weak Concordance between Fish and Macroinvertebrates in Mediterranean Streams

et al. 2012

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Although anthropogenic degradation of riverine systems stimulated a multi-taxon bioassessment of their ecological integrity in EU countries, specific responses of different taxonomic groups to human pressure are poorly investigated in Mediterranean rivers. Here, we assess if richness and composition of macroinvertebrate and fish assemblages show concordant variation along a gradient of anthropogenic pressure in 31 reaches across 13 wadeable streams in central Italy. Fish and invertebrate taxonomic richness was not correlated across sites. However, Mantel test showed that the two groups were significantly, albeit weakly, correlated even after statistically controlling for the effect of environmental variables and site proximity. Variance partitioning with partial Canonical Correspondence Analysis showed that the assemblages of the two groups were influenced by different set of environmental drivers: invertebrates were influenced by water organic content, channel and substratum features, while fish were related to stream temperature (mirroring elevation) and local land-use. Variance partitioning revealed the importance of biotic interactions between the two groups as a possible mechanisms determining concordance. Although significant, the congruence between the groups was weak, indicating that they should not be used as surrogate of each other for environmental assessments in these Mediterranean catchments. Indeed, both richness and patterns in nestedness (i.e. where depauperate locations host only a subset of taxa found in richer locations) appeared influenced by different environmental drivers suggesting that the observed concordance did not result from a co-loss of taxa along similar environmental gradients. As fish and macroinvertebrates appeared sensitive to different environmental factors, we argue that monitoring programmes should consider a multi-assemblage assessment, as also required by the Water Framework Directive.

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Section: Discussionmentioning

confidence: 99%

Weak Concordance between Fish and Macroinvertebrates in Mediterranean Streams

et al. 2012

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“…Many studies have attempted to quantify the importance of biotic and abiotic factors in determining stream fish communities, variously emphasizing the importance of habitat structure (Gorman & Karr, 1978;Schlosser, 1982;Angermeier & Karr, 1983;Grossman et al, 1998), hydrological characteristics (Poff & Allan, 1995;Oberdorff et al, 2001;Robinson & Rand, 2005) and biotic interactions (Zaret & Rand, 1971;Rahel & Stein, 1988).…”

Section: Introductionmentioning

confidence: 99%

Organization patterns of headwater-stream fish communities in the Upper Paraguay–Paraná basins

et al. 2007

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We compared environmental influences on the assemblages of stream fishes of contiguous but biogeographically distinct parts of the Upper Paraguay and Paraná basins in Brazil, aiming to describe the main distribution patterns of fish species in the headwater streams. We analyzed bimonthly samples in 10 streams in each basin from January to November 2004. Sixty fish species were collected, including 40 species in streams of the Paraguay Basin and 42 species in streams of the Paraná Basin. The species abundance rank did not differ between the basins. We found a clear differentiation between the Paraguay and Paraná stream fish assemblages. There were significant differences in species composition among streams, but no seasonal differences in species composition. Connectivity between streams explains the differences in species composition for the Paraguay streams, but not for the Paraná streams. Hydrological characteristics were the main factors determining species distribution in both basins, suggesting that the migratory capacity of each species and biogeographical barriers may act to filter the local species composition from the total species pool of colonizers.

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“…Waterfalls and rapids can represent an important physical barrier to be crossed by the aquatic fauna (Robinson et al 2005), especially for the fish species that carries out longitudinal migrations in the river channels. The first waterfall of the Madeira River rapids to be crossed during the longitudinal migration of the fish is the Santo Antonio Falls.…”

Section: Introductionmentioning

confidence: 99%

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO

et al. 2009

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Belmont Stream is the main tributary of the Madeira River in the area immediately downriver from the Santo Antonio Fall. Samplings were carried out using gill nets in the mouth of this stream between May 2005 and April 2006 and resulted in a list of 74 species. The analyses included values of composition, constancy of occurrence, species richness, abundance, Catch Per Unit of Effort and trophic structure about the ten most abundant species. Characiformes and Siluriformes were dominant order in the samples and Curimatidae (popularly known as "branquinhas") was the most abundant family, represented by Psectrogaster rutiloides (32.57% of the collected specimens), Potamorhina altamazonica (10.72%), and Potamorhina latior (7.79%). The most of species were considered accessory and accidental and richness suggests high values in the rising and high water. Belmont maybe considered as a moderate richness when compared to those found for others Amazon rivers. Detritivorous fishes composed 60% of the assemblage and the constancy of the most abundant species of this family suggests Belmont as an important area to these migratory fishes. Resumo: O igarapé Belmont localiza-se a cerca de 30 km de Porto Velho e é o principal afluente do rio Madeira na área imediatamente a jusante da cachoeira de Santo Antonio. No período compreendido entre maio de 2005 a abril de 2006, dez coletas realizadas na foz deste igarapé geraram uma lista com 74 espécies coletadas por malhadeiras. As análises incluem características físico-químicas do igarapé estudado, valores de riqueza, composição, constância, estrutura trófica da assembléia de peixes e valores de CPUE. O predomínio das ordens Characiformes e Siluriformes confirma o esperado para a Amazônia. A família Curimatidae foi a mais abundante, representada por Psectrogaster rutiloides (32,57%), Potamorhina altamazonica (10,72%) e Potamorhina latior (7,79%), popularmente conhecidas como branquinhas. A riqueza e constância de algumas espécies sugerem um papel especial da área no que diz respeito à transposição das corredeiras pelas espécies. Conclui-se que a estrutura e a composição da ictiofauna na área estudada do igarapé Belmont é marcada por espécies migradoras detritívoras, possivelmente em função do papel do rio Madeira nas rotas migratórias. Palavras-chave: riqueza, dominância, CPUE, rotas migratórias, Amazônia.

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Discontinuity in fish assemblages across an elevation gradient in a southern Appalachian watershed, USA

Cited by 29 publications

References 35 publications

Weak Concordance between Fish and Macroinvertebrates in Mediterranean Streams

Weak Concordance between Fish and Macroinvertebrates in Mediterranean Streams

Organization patterns of headwater-stream fish communities in the Upper Paraguay–Paraná basins

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO

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