Assemblage Organization in Stream Fishes: Effects of Environmental Variation and Interspecific Interactions

Grossman, Gary D.; Ratajczak, Robert E.; Crawford, Maurice; Freeman, Mary C.

doi:10.2307/2657245

Cited by 77 publications

(108 citation statements)

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“…500‐m stretches). Only axes with eigenvalues greater than one were interpreted, which also represented ecologically meaningful patterns of habitat variation (Grossman et al., 1998). Graphical representation of the ordination plots was achieved using ADE‐4 (Chessel and Thoulouse, 1998) and MacDraft PE ® (Microspot © Ltd).…”

Section: Study Area Materials and Methodsmentioning

confidence: 99%

Abundance and night-time habitat use patterns of Ponto-Caspian gobiid species (Pisces, Gobiidae) in the littoral zone of the River Danube, Hungary

2005

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We examined the abundance and meso-habitat use of gobiid species during both day and night along 43 stretches (500-m long) of the littoral zone at five locations of the Middle Danube, Hungary, in spring and in summer 2004. Electrofishing catch per unit effort sampling revealed significantly higher relative densities at night than during the day. Gobiids occupied all the available habitats encountered during sampling. Habitat-abundance relationships from night-time samples revealed that the two most abundant species, round goby Neogobius melanostomus and bighead goby Neogobius kessleri, were found in highest relative density along gravel beach and artificial rip-rap habitats; these species were in relatively low density in sandy areas. Monkey goby Neogobius fluviatilis was more abundant in natural shorelines than in rip-rap habitats and dispersed more consistently between sandy and gravel beaches. Tubenose goby Proterorhinus marmoratus demonstrated great plasticity in meso-habitat use. In conclusion, Ponto-Caspian gobies occurred rather consistently along the Hungarian section of the Danube, occupying all available habitats examined. Abundance-habitat relations suggest plasticity in meso-habitat use but partial segregation between species. Further studies are required at multiple spatial scales to assess how micro-and meso-habitat use varies with fluctuating population densities.

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Section: Study Area Materials and Methodsmentioning

confidence: 99%

Abundance and night-time habitat use patterns of Ponto-Caspian gobiid species (Pisces, Gobiidae) in the littoral zone of the River Danube, Hungary

2005

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“…Hydrological cycle fluctuations have important effects on the function of a river ecosystem and the structure of aquatic communities (Grossman et al ., ; Jackson et al ., ). River flow is a key element, as it integrates complex environmental conditions that are directly related to ecological patterns and processes, including alterations in the physical habitat and trophic resource availability (Biggs et al ., ; Pey‐Yi & Jian‐Ping, ).…”

Section: Introductionmentioning

confidence: 98%

The role of the hydrological cycle on the distribution patterns of fish assemblages in an Andean stream

Ríos-Pulgarín

Barletta

Mancera-Rodrı́guez

2015

Journal of Fish Biology

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The seasonal and interannual changes of the fish assemblage in the main channel and littoral zone of the Guarinó River, a torrential system located in the Colombian Andean foothills, were examined in relation to the physical and chemical environmental changes associated with the hydrological cycle and the El Niño-La Niña-Southern Oscillation (ENSO) between 2007 and 2010. Four samplings per year (in dry season and high water) were performed. Environmental variables (temperature, pH, conductivity, turbidity, oxygen, total nitrogen, orthophosphate, depth and flow rate) were contrasted with ANOVAs and a discriminant analysis to establish temporal patterns. Biological descriptors (richness, density and biomass) were contrasted with ANCOVAs. The temporal patterns of the taxonomic and functional composition and the density of the fish assemblages were examined with respect to environmental variables through canonical discriminant analysis per habitat. Interannual differences were significant with regard to density and richness for the main channel habitat; while in the littoral zone, the differences were significant between both the year and seasons. Discriminant analysis showed variations in species composition and relative abundance between the main channel and the littoral zone under contrasting hydrological conditions of El Niño-La Niña. High flows from 2008 to 2009 (La Niña) favoured resident species (e.g. Creagrutus magdalenae) and small benthic Siluriformes (e.g. Chaetostoma spp.), but was limited to migratory species (e.g. Prochilodus magdalenae). From 2009 to 2010 (El Niño), the most common species were reduced and rare species increased. River flow, temperature and oxygen were the variables that had the largest influences on the seasonal and interannual differences in the fish assemblage structure of the Guarinó River. The results suggested that the presence and abundance of species and functional groups in different habitats were regulated by stochastic conditions, such as droughts, floods and drag events associated with the Southern Oscillation phenomenon (ENSO), acting as a hydrological disturbance on the habitats and generating different responses according to the adaptive characteristics of the species.

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“…The irregular flow configuration interacting with morphology results in a diversity of patchy differentiated sections (Drago et al, ), which probably leads to different fish assemblage structures. Thus, habitat selection by fish species is most likely to be affected by substrate texture and hydraulic variables such as water depth and flow velocity, as it has been commonly observed in streams and rivers (Blanck et al, ; Gorman & Karr, ; Grossman et al, ).…”

Section: Introductionmentioning

confidence: 99%

Fish Structure in Channel Networks of a Large Anabranching Floodplain: Effect of Isolation/Connection Processes

Abrial

Espínola

Amsler

et al. 2019

Water Resources Research

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Channel networks of floodplain rivers are the main routes for water, sediment, organic matter, and aquatic organisms between main channels and lakes, playing a substantial role in floodplain dynamics. Despite their importance most investigations in large floodplain rivers focus on main channels and lentic water bodies. This research deals with fish assemblage variations in different lotic sites (scour holes and straight reaches) of one of the many channels which shape the wide anabranching floodplain of the middle reach of the Paraná River. We considered the influence of environmental factors, such as hydro-geomorphological features and water quality of the channel, connections with surrounding lentic water bodies, seasonality, and interannual flow variations. The results showed two main ecological patterns closely related to floodplain connectivity. In-channel habitat heterogeneity has low influence on fish assemblages when minor channels are connected to significant flooded areas (sampling period 2013-2016). Spatial or temporal predictions of fish structure during these stages are not easy due to the interaction of several environmental factors. However, during very low water levels (winter of 2018) most lentic areas become isolated from the nearby channel network, and floodplain fish are forced to move into the numerous scour holes of the floodplain channels where water conditions resemble those in lentic habitats. Our work highlights the importance of in-channel characteristics of floodplain river networks and their crucial role for fish conservation, particularly during very low water stages.

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Assemblage Organization in Stream Fishes: Effects of Environmental Variation and Interspecific Interactions

Cited by 77 publications

References 0 publications

Abundance and night-time habitat use patterns of Ponto-Caspian gobiid species (Pisces, Gobiidae) in the littoral zone of the River Danube, Hungary

Abundance and night-time habitat use patterns of Ponto-Caspian gobiid species (Pisces, Gobiidae) in the littoral zone of the River Danube, Hungary

The role of the hydrological cycle on the distribution patterns of fish assemblages in an Andean stream

Fish Structure in Channel Networks of a Large Anabranching Floodplain: Effect of Isolation/Connection Processes

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