Effects of flow fluctuations on the daily and seasonal drift of invertebrates in a tropical river

Castro, Diego Marcel Parreira de; Hughes, Robert M.; Callisto, Marcos

doi:10.1051/limn/2013051

Cited by 16 publications

(9 citation statements)

References 35 publications

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“…Barriers within our study are characterized by shallow depths, and fast and turbulent water, which respond more readily to variations in discharge, and could thus exhibit more oscillatory flow than deeper pool areas (Newbury & Bates, 2007). As our barrier sites evidenced larger temporal oscillations of most measured drift parameters (i.e., invertebrates, moss and FPOM) than pools, we can conclude that flow alterations have influenced the observed drift patterns, as it has been demonstrated in many drift studies worldwide (e.g., James et al, 2009;Castro et al, 2013;Miller & Judson, 2014 and references therein). Similar conclusions were also posed by Miller & Judson (2014) in the study at Flaming Gorge Dam (Utah, USA), where the effects of natural hydropeak cycles and experimental flows on drift patterns were investigated.…”

Section: Effects Of Mesohabitat and Seasonal Shifts On Invertebrate Driftsupporting

confidence: 72%

Freshwater reefs as mesohabitats for the assessment of diel invertebrate drift patterns

et al. 2021

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Freshwater reefs (known as tufa barriers) are special karst features recognized for highly heterogeneous habitat structures, complex hydrogeological features, and unique macrozoobenthos drift (downstream dispersal) patterns. Our study objective was to investigate diel and seasonal drift patterns between barriers and pools, both composed of moss-rich and fishless mesohabitat types, aligned on a small spatial scale within the karst, tufa-precipitating Plitvice Lakes hydrosystem. We monthly sampled drift at the two mesohabitat types (barriers and pools) during midday and dusk and examined quantitative and qualitative drift compositions, including drifting invertebrates, moss, and associated particulate organic and inorganic matter (APOIM). Barriers displayed higher invertebrate drift densities than those of pools. The same pattern was observed for moss and APOIM. At both mesohabitat types, invertebrate drift showed peak but highly variable densities during late spring and summer (mean >100 individuals m-3), whereas during late winter and early spring the drift densities were 5-fold lower than those densities. The nonmetric multidimensional scaling analysis revealed that invertebrate drift seasonality was influenced by seasonal drift patterns of aquatic moss and moss-dwelling invertebrate taxa. Adult and/or larval Riolus spp. and larval Hemerodromia spp. were found to be the most significant for the separation of midday and dusk within the NMDS ordination of barriers and pools. At barriers, midday drift densities of invertebrates, moss, and APOIM were higher than the respective dusk records. Within pools, invertebrate drift was largely aperiodic. We suggest that increased midday and/or aperiodic drift are a consequence of the lack of fish between barrier- and pool-mesohabitats. Our results further indicated that aquatic invertebrates inhabiting fast-flowing barriers and slow-flowing pools mostly exhibit “passive drift” mediated by transport agents such as water flow and dislodged aquatic vegetation. The observed spatio-temporal drift patterns are also likely influenced by ontogenetic shifts in drift periodicity (i.e., shifts depending on the development stage and morphological characteristics of the individual taxa) as well as benthic distribution of moss-dwelling invertebrate taxa. We can conclude that biotic (vs. abiotic) controls of drift are likely minimized in the fishless case of the freshwater reefs and associated barrier–pool sequences within Plitvice Lakes hydrosystem.

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Section: Effects Of Mesohabitat and Seasonal Shifts On Invertebrate Driftsupporting

confidence: 72%

Freshwater reefs as mesohabitats for the assessment of diel invertebrate drift patterns

et al. 2021

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“…Despite the predominance of Chironomidae during all hydrological conditions and in all habitats, significant seasonal differences in benthic macroinvertebrate community attributes were detected and indicate temporal shifts in macroinvertebrate community composition, structure and function. Other studies have also detected seasonal differences in the macroinvertebrate community attributes associated with flow regime variability in both unregulated (Tupinambás et al , ; Ríos‐Touma et al , ) and regulated south American river reaches (Tomanova et al , ; Rosin et al , ; Maroneze et al , ; Castro et al , ).…”

Section: Discussionmentioning

confidence: 95%

Macroinvertebrate responses to distinct hydrological patterns in a tropical regulated river

et al. 2015

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Despite the fundamental importance of reservoirs and dams for socioeconomic development, their presence results in large‐scale alterations to the natural flow regime of the rivers and profoundly influences aquatic processes and biodiversity. This study compared macroinvertebrate community composition and structure metrics, as well as biological and ecological traits to evaluate their dependence on inter‐seasonal and intra‐seasonal flows and water quality downstream of the Itutinga reservoir situated on Rio Grande in Brazil. The results demonstrated the utility of benthic macroinvertebrate abundance, density, richness, size, reproduction, locomotion and feeding modes to assess flow regime and water quality variability. Changes in the macroinvertebrate communities were closely associated with seasonal differences in parameters such as temperature, turbidity and nutrients, which were modulated by substrate particle size and heterogeneity. Modification of the flow regime, as a result of river regulation, influences the composition, structure and functioning of river ecosystems and is reflected in changes to the aquatic communities they support. The results of this study highlight the extreme complexity of the links between physicochemical, hydrological and biological processes in lotic systems and the need to better understand these links in order to develop and implement optimal environmental flow regimes in regulated rivers. Copyright © 2015 John Wiley & Sons, Ltd.

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“…The complex phenomenon known as “drift,” the downstream transport of organisms in the current (Brittain & Eikeland, 1988; Castro, Hughes & Callisto, 2013), would explain the presence of benthic organisms in the water column, mainly in the pre‐dam phase. The turbulent flow of the Juruena River could be one reason that benthic organisms were found in the water column, although biotic causes such as dispersal, food searching, predation, and competition cannot be ruled out, according to the conceptual model by Brittain and Eikeland (1988).…”

Section: Discussionmentioning

confidence: 99%

Impacts of small dams on the phytoplankton and invertebrates in an Amazonian river

Arcifa

Coelho

Silva

et al. 2023

River Research & Apps

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The construction of small hydroelectric plants (SHPs) has increased greatly worldwide, and the impacts of these impoundments can cause changes in the aquatic biota. Here, we investigated the ecological attributes (abundance, richness, and species diversity) of three communities (phytoplankton, invertebrates in the water column, and benthos) and the functional groups of phytoplankton, before and after the construction of five SHPs in an Amazonian river. The communities were sampled at two sites, one upstream and another downstream of each dam or construction site, before the dam closure. The dam did not change the limnological factors, and the acid waters and low electrical conductivity, typical of “cerrado” rivers, were characteristic of both the pre‐ and post‐dam phases. For aquatic communities, the phytoplankton abundance increased and the diversity of groups decreased in the post‐dam phase. Regarding the morphology‐based functional groups (MBFG), there was an increase in groups I (small algae with a high surface/volume ratio) and V (phytoflagellates), with a reduction in groups VI (diatoms) and VII (large mucilaginous colonies) in the post‐dam phase. The relative abundance of zooplankton species increased in the post‐dam phase, and the opposite was observed for the benthic community, with reductions in abundance, richness, and group diversity in the post‐dam phase. The structure of the three communities differed between the pre‐ and post‐dam phases, but no difference in communities' similarity was observed between the upstream and downstream sites in both phases. The results show that the change in hydrodynamics, from lotic to semi‐lentic, in the reservoirs of the SHPs, was the main driving force for the alterations in the three communities. For phytoplankton, SHPs are favorable in the sense of decreasing the incidence of algal blooms, particularly of cyanobacteria.

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Effects of flow fluctuations on the daily and seasonal drift of invertebrates in a tropical river

Cited by 16 publications

References 35 publications

Freshwater reefs as mesohabitats for the assessment of diel invertebrate drift patterns

Freshwater reefs as mesohabitats for the assessment of diel invertebrate drift patterns

Macroinvertebrate responses to distinct hydrological patterns in a tropical regulated river

Impacts of small dams on the phytoplankton and invertebrates in an Amazonian river

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