Hydraulic Preferences of Shrimps and Fishes in Tropical Insular Rivers

Girard, V.; Monti, Dominique; Valade, Pierre; Lamouroux, Nicolas; Mallet, J.-P.; Grondin, Henri

doi:10.1002/rra.2675

Cited by 13 publications

(16 citation statements)

References 61 publications

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“…Macroinvertebrate diversity and abundance were significantly lower in the HUW than at the LUW and MUW. This difference among the three rivers can probably be explained by limited food availability, habitat loss, and warmer water temperature in conjunction with the flashy discharge regimes; low invertebrate production can be a consequence of high water discharges (Heino et al 2004;Girard et al 2013).…”

Section: Discussionmentioning

confidence: 98%

Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

2015

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Urbanization influences a range of factors related to stream health, including the hydrologic regime, water quality, and riparian conditions that lead to negative effects on terrestrial and aquatic ecosystems. However, impacts on freshwater decapods from urbanization of tropical streams have not been reported. We hypothesized that changes in decapod communities in watersheds with different levels of urbanization are related to changes in physical stream habitats caused by different land uses and their effects on water discharge. The impacts of land use on the physico-chemical characteristics of streams and freshwater decapod communities were evaluated in three watersheds characterized by low, moderate and highintensities of urbanization in Puerto Rico. For the low and moderately developed urban watersheds, decapod species richness ranged from 10 to 11 species; the highly urbanized watershed only had 4 species. Macrobrachium faustinum and Xiphocaris elongata were the most ubiquitously species and were found in all watersheds. Multivariable analysis of physical characteristics and densities of the decapod families resulted in one axis that explained 80 % of the total variation among the watersheds and was correlated with stream discharge. The effect of discharge is likely a result of frequent high flows that sustain habitats with high concentrations of dissolved oxygen and low concentrations of pollutants. An increase in physicochemical parameters were observed from the LUW to the HUW. These results indicate that the decapod communities were most likely influenced by land use and environmental conditions that affected erosional aspects related to water discharge and water quality in the highly impacted watersheds.

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Section: Discussionmentioning

confidence: 98%

Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

2015

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“…Stream hydraulic characteristics have been reported as the main factors determining shrimp-assemblage variation in other regions (Kemenes et al, 2010;Novak, Bayliss, Garcia, Pusey, & Douglas, 2017;Richardson & Cook, 2006). Among the hydraulic characteristics, stream velocity is usually the most influential habitat variable and a key factor related to shrimp distribution and composition (Girard et al, 2014;Richardson & Cook, 2006). As a general pattern, M. inpa was more abundant in shallow locations with lower current velocities, while M. nattereri and P. amazonensis were more abundant in deeper places with higher current velocities.…”

Section: Discussionmentioning

confidence: 99%

Habitat segregation among freshwater shrimp species in an Amazonian rainforest stream system

et al. 2019

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Resource partitioning is a stabilising mechanism known to maintain species diversity in a variety of environments. Assemblages of stream shrimp species are structured by habitat features and predation. Therefore, segregation along habitat dimensions could facilitate coexistence among species in shrimp assemblages even when segregation is a result of predation pressure by fish species. These ecological interactions take place on a background modulated by biogeographic features, such as connectivity among drainages. However, these generalisations are mainly based on studies undertaken in temperate regions. We investigated whether abundances of rainforest shrimp species are related to habitat dimensions, and whether habitat–abundance relationships might be mediated through fish‐assemblage structure and the effect of drainages on connectivity. We detected effects of habitat variation on densities of shrimp species, but the magnitudes of the effects were larger for some species than others. Fish‐assemblage composition also affected shrimp densities. Two of the three species of shrimp showed some degree of habitat specialisation, but only along current‐velocity, depth, and pH gradients. Habitat segregation among species occurred along the current‐velocity and pH gradients. Relationships between density and environmental gradients differed between catchments for only one species and only along the pH gradient. Our findings provide evidence that rainforest‐stream shrimp species respond differently to environmental gradients and this could facilitate coexistence among species. However, interactions with fish seem to have a stronger effect on species densities, and consequently species segregation, than direct effects of the environmental gradients, resulting in apparent competition for these resources.

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“…In lotic ecosystems, specific biota are well recognized, including biofilms (Lear, Anderson, Smith, Boxen, & Lewis, ), diatoms (Passy, ), plankton, meiofauna (Dole‐Olivier, Galassi, Marmonier, & Creuzé des Châtelliers, ), worms (Traunspurger, ), aquatic insects (Gratton & Zanden, ), snails (Cross & Benke, ), bivalves (Sheldon & Walker, ), crustacea (Girard et al, ), and fish (Schlosser & Angermeier, ). In dryland rivers, lotic biota and ecology are less well acknowledged.…”

Section: Discussionmentioning

confidence: 99%

“…In lotic ecosystems, specific biota are well recognized, including biofilms (Lear, Anderson, Smith, Boxen, & Lewis, 2008), diatoms (Passy,FIGURE 14 Profile of the Murray River showing weirpools and remaining lotic habitats in the main channel at low and regulated flows (<10,000 ML d −1 ). At high flows (>50,000 ML d −1 ) the lower weirs are removed and the channel becomes entirely lotic for the lower 1,992 km 2001), plankton, meiofauna (Dole-Olivier, Galassi, Marmonier, & Creuzé des Châtelliers, 2000), worms (Traunspurger, 2000), aquatic insects (Gratton & Zanden, 2009), snails (Cross & Benke, 2002), bivalves (Sheldon & Walker, 1989), crustacea (Girard et al, 2014), and fish (Schlosser & Angermeier, 1995). In dryland rivers, lotic biota and ecology are less well acknowledged.…”

Section: River Channels and Lotic Ecologymentioning

confidence: 99%

History, hydrology and hydraulics: Rethinking the ecological management of large rivers

Mallen‐Cooper

Zampatti

2018

Ecohydrology

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Climatic extremes capture imaginations and provide a fundamental premise for biologists—that ecosystems are adapted to natural variability. Hence, understanding past extremes provides a template for contemporary ecological models and management. Nevertheless, myths can develop around historical climatic events, distorting perceptions of the past. The mythology of the Murray River in Australia is that over 100 years ago, it naturally “dried to a series of pools” in drought; therefore, the biota are flexible and adapted to hydrological variability and lentic habitats. Analysis of historical and modelled hydrology and hydrodynamics, however, demonstrates that: (a) cease‐to‐flow events were not natural and were instead caused by multiple small‐scale irrigation diversions; and (b) the Murray River had widespread perennial lotic habitats. Within a generation, the spatial, temporal, and causal context was lost and with it, the links between preregulation hydrology and hydraulics, and river ecology. From an intermittently lentic system, we propose an alternative model which integrates ecohydrology and ecohydraulics. Specifically, the model incorporates: (a) persistence of lotic in‐channel and lentic off‐channel refugia, even in droughts; and (b) a reliable spring flow pulse that increases hydrodynamic complexity, promotes longitudinal integrity of lotic conditions and replenishes low‐lying wetlands. The model helps explain the decline of lotic biota, suggesting that hydraulic change has had a greater impact on aquatic biodiversity than changes in hydrology. Being mindful of historical conditions and considering spatio‐temporal ecohydraulics provides new opportunities for the rehabilitation of highly modified rivers and may assist the strategic development of large rivers, including for hydropower.

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Hydraulic Preferences of Shrimps and Fishes in Tropical Insular Rivers

Cited by 13 publications

References 61 publications

Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

Habitat segregation among freshwater shrimp species in an Amazonian rainforest stream system

History, hydrology and hydraulics: Rethinking the ecological management of large rivers

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