Fish communities along environmental gradients in a system of tropical streams

1983 ◽  
Vol 9 (2) ◽  
pp. 117-135 ◽  
Author(s):  
Paul L. Angermeier ◽  
James R. Karr
Keyword(s):  
Environmental Gradients ◽  
Fish Communities ◽  
Tropical Streams

Food web pathways for fish communities in small tropical streams

2020 ◽  
Vol 65 (5) ◽  
pp. 893-907 ◽  
Author(s):  
Andressa da Silva Reis ◽  
Míriam Pilz Albrecht ◽  
Stuart E. Bunn
Keyword(s):  
Food Web ◽  
Fish Communities ◽  
Tropical Streams

The functional composition of nearshore fish communities demonstrated by trait analysis: Response to environmental gradients

2021 ◽  
Vol 169 ◽  
pp. 112562
Author(s):  
Joana Baptista ◽  
Pieter van der Linden ◽  
Filipe Martinho ◽  
Rogélia Martins ◽  
Miguel Carneiro ◽  
...  
Keyword(s):  
Environmental Gradients ◽  
Fish Communities ◽  
Functional Composition ◽  
Trait Analysis

scholarly journals Functional diversity and redundancy of freshwater fish communities across biogeographic and environmental gradients

2018 ◽  
Vol 24 (11) ◽  
pp. 1612-1626 ◽  
Author(s):  
Karl A. Lamothe ◽  
Karen M. Alofs ◽  
Donald A. Jackson ◽  
Keith M. Somers
Keyword(s):  
Freshwater Fish ◽  
Functional Diversity ◽  
Environmental Gradients ◽  
Fish Communities

scholarly journals Integrity of fluvial fish communities is subject to environmental gradients in mountain streams, Sierra de Aroa, north Caribbean coast, Venezuela

2006 ◽  
Vol 4 (3) ◽  
pp. 319-328 ◽  
Author(s):  
Douglas Rodríguez-Olarte ◽  
Ahyran Amaro ◽  
Jorge Coronel ◽  
Donald C. Taphorn B.
Keyword(s):  
Environmental Gradient ◽  
Fish Assemblages ◽  
Environmental Gradients ◽  
Fish Communities ◽  
Physical Habitat ◽  
Heterogeneous Habitat ◽  
Components Analysis ◽  
The Relationship ◽  
Different Levels ◽  
Habitat Parameters

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 differences and the scores were higher in protected rivers. The IBI detected degree of disturbance of fish communities without direct consideration of habitat parameters measured. The PCA revealed a gradient in substrate heterogeneity. Similarly, CCA revealed differences in fish assemblage composition along the environmental gradient and that varied with protection status of the river. The relationship between PCA and IBI scores was highly significant (r² = 0.61, P < 0.0001). The PCA and CCA analysis moderately validated the structure and predictability of IBI; but it is still necessary to refine the model and to extend its application for more time and over a wider area.

Structure of marine predator and prey communities along environmental gradients in a glaciated fjord

2012 ◽  
Vol 69 (12) ◽  
pp. 2029-2045 ◽  
Author(s):  
Martin Renner ◽  
Mayumi L. Arimitsu ◽  
John F. Piatt
Keyword(s):  
Trophic Level ◽  
Environmental Gradients ◽  
Fish Communities ◽  
Harbor Seal ◽  
Trophic Levels ◽  
Tidewater Glaciers ◽  
Rissa Tridactyla ◽  
Marine Predator ◽  
Capelin Mallotus Villosus ◽  
Biological Attributes

Spatial patterns of marine predator communities are influenced to varying degrees by prey distribution and environmental gradients. We examined physical and biological attributes of an estuarine fjord with strong glacier influence to determine the factors that most influence the structure of predator and prey communities. Our results suggest that some species, such as walleye pollock (Theragra chalcogramma), black-legged kittiwake (Rissa tridactyla), and glaucous-winged gull (Larus glaucescens), were widely distributed across environmental gradients, indicating less specialization, whereas species such as capelin (Mallotus villosus), harbor seal (Phoca vitulina), and Kittlitz's murrelet (Brachyramphus brevirostris) appeared to have more specialized habitat requirements related to glacial influence. We found that upper trophic level communities were well correlated with their mid trophic level prey community, but strong physical gradients in photic depth, temperature, and nutrients played an important role in community structure as well. Mid-trophic level forage fish communities were correlated with the physical gradients more closely than upper trophic levels were, and they showed strong affinity to tidewater glaciers. Silica was closely correlated with the distribution of fish communities, the mechanisms of which deserve further study.

scholarly journals Taxonomic and phylogenetic beta diversity in headwater stream fish communities of the Paraná and Paraguai River basins

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Gabriel Nakamura ◽  
Wagner Vicentin ◽  
Yzel Rondon Súarez
Keyword(s):  
Environmental Factors ◽  
Beta Diversity ◽  
Environmental Gradients ◽  
Fish Communities ◽  
River Basins ◽  
Water Velocity ◽  
Headwater Stream ◽  
Stream Fish ◽  
Evolutionary Mechanisms ◽  
Species Sorting

ABSTRACT Patterns of species replacement and richness differences along environmental gradients or ecoregions shed light on different ecological and evolutionary mechanisms acting on community structure. Communities of aquatic ecosystems of different watersheds are supposed to host distinct species and lineages. Quantifying and understanding the degree to which these differences are affected by environmental and biogeographical factors remains an open question for these environments, particularly in the Neotropical region. We investigated patterns of taxonomic and phylogenetic composition of headwater streams of the Paraná and Paraguai River basins to understand how local and biogeographical factors affect the assembly of fish communities. We also quantified taxonomic and phylogenetic beta diversity by decomposing them into nestedness and turnover components. We found that local environmental factors are the main factors influencing the composition of stream fish communities. Whereas pH affected both taxonomic and phylogenetic turnover, water velocity was responsible for phylogenetic turnover and pH was the main driver of phylogenetic nestedness. Our results indicate an effect of local environmental factors in determining the structure of headwater stream fish communities through a combination of a species sorting mechanism (water velocity and pH) and phylogenetic habitat filtering (pH).

Fish communities along environmental gradients within the Comoé River basin, Côte d'Ivoire

2005 ◽  
Vol 30 (2) ◽  
pp. 185-194 ◽  
Author(s):  
Stanislas S Yao ◽  
Essetchi P Kouamélan ◽  
Tidiani Koné ◽  
Valentin N'Douba ◽  
Gooré Bi ◽  
...  
Keyword(s):  
River Basin ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Environmental Gradients ◽  
Fish Communities ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

scholarly journals Diversidade de presas e predadores (Insecta) em mesohabitats de córregos de Cerrado

2018 ◽  
Vol 108 (0) ◽  
Author(s):  
Nubia F. S. Giehl ◽  
Bethânia O. Resende ◽  
Paulo F. S. S. Roges ◽  
Karina Dias-Silva ◽  
Denis S. Nogueira ◽  
...  
Keyword(s):  
Aquatic Insects ◽  
Riparian Vegetation ◽  
Environmental Gradients ◽  
Physical Characteristics ◽  
Tropical Streams ◽  
Substrate Type ◽  
Third Order ◽  
Predator Diversity

ABSTRACT Tropical streams feature high variety of habitats and environmental gradients, which reflect on the greater richness of aquatic insects. In this way, we evaluate if the diversity of aquatic insects of prey and predator categories is influenced by the type of substrates or by longitudinal portions in Cerrado streams. Our hypothesis is that prey and predator diversity will be determined by the type of substrate, assuming that the substrate serves as a source for foraging and / or refuge. In addition, the folhiço substrate will present greater abundance and richness due to the availability of shelter and food provided by this type of substrate. There will be differences in prey and predator composition among substrates, since some species have associations with the substrate type. The portions of the stream will have no effect on the diversity of prey and predator, since in streams of up to third order does not present considerable changes in physical characteristics. The study was carried out in nascent (1st order), intermediate (2nd) and estuary (3rd), in two streams, during dry and rainy periods. Five subsamples of sand, gravel, rocks or boulders were collected, backwaters, rapids and roots (substrate). The substrate influenced all prey and predator responses (abundance, richness and composition), but the environment (longitudinal portions) did not influence the abundance and predator composition. The influence of substrates on the diversity of prey and predators evidences the importance of riparian vegetation as a source of allochthonous material in bedside streams.

Nutrient recycling by insect and fish communities in high-elevation tropical streams

Hydrobiologia ◽  
2019 ◽  
Vol 838 (1) ◽  
pp. 13-28 ◽  
Author(s):  
Carla L. Atkinson ◽  
Alexander V. Alexiades ◽  
Keeley L. MacNeill ◽  
Andrea C. Encalada ◽  
Steve A. Thomas ◽  
...  
Keyword(s):  
Nutrient Recycling ◽  
Fish Communities ◽  
High Elevation ◽  
Tropical Streams
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