Insetos aquáticos do açude São José dos Cordeiros (semi-árido paraibano) com ênfase em Chironomidae

Brito-Junior, Luciano de; Abílio, Francisco José Pegado; Watanabe, Tomonori

doi:10.1590/s0328-03812005000200002

Cited by 10 publications

(1 citation statement)

References 6 publications

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“…The first studies on benthic macroinverebrates in semi-arid Brazil, deal mostly with the taxonomy and distribution of specific taxa, such as Mollusca (Abílio et al, 2007). In reservoirs studies relate the biology and ecology of macroinvertebrates in the littoral sediment and associated with aquatic macrophytes (Abílio et al 2005a(Abílio et al , b, 2006Abílio and Watanabe 1998, 2000, Brito-Junior et al 2005, Souza and Abílio, 2006. It is important to mention that such studies frequently record the presence of the Planorbidae Biomphalaria straminea, the in semi-arid Brazil, in order to understand their structure and functioning.…”

Section: Benthic Invertebratesmentioning

confidence: 99%

Aquatic systems in semi-arid Brazil: limnology and management

et al. 2012

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Aquatic systems in semi-arid Brazil include natural shallow lakes, artificial reservoirs and intermittent streams and rivers. These systems are distinctive features in the semi-arid landscape and comprise a range of associated systems functioning as an ever-changing mosaic of dry/wet patches. Lakes and reservoirs in semi-arid Brazil are subject to important periods of water shortages, whereas rivers and streams are characterized as highly variable and driven by the extremes of water flow and its absence. Within this view a catchment-scale approach must be used to create a holistic model to conceptualize and comprehend these aquatic systems, since the aquatic environment types in the semi-arid region of Brazil incorporate broader aspects within the catchment scale such as geomorphology, vegetation, climate and land use. This paper summarizes some of the information on the aquatic systems of the Brazilian semi-arid region and shows the importance of limnological studies in this region. It also attempts to establish perspectives for future research considering the catchment as a scale for surveying biological processes and limnological characteristics of the various aquatic systems. It is presented information on their overall structure and functioning, as well as characteristics of some biological communities, such as phytoplankton, periphyton, aquatic macrophytes, benthic invertebrates and fish. The importance of the understanding of eutrophication in reservoirs and the role of the dry phase in streams is emphasized, and information on possible actions of planning and management to improve water quality of reservoirs are presented.

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Section: Benthic Invertebratesmentioning

confidence: 99%

Aquatic systems in semi-arid Brazil: limnology and management

et al. 2012

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Influences of environmental parameters and phytoplankton productivity on benthic invertebrates in a tropical oligotrophic lake, northern Malaysia

Rahman

Fathi²,

Balcombe

et al. 2021

Environ Sci Pollut Res

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Studies that associate environmental parameters with aquatic organisms in man-made lakes remain limited by accessibility and interest particularly in many Asian countries. With missed opportunities to monitor environmental transitions at Lake Kenyir, our knowledge of lake transition is restricted to the non-mixing shallow waters only. Triplicate monthly benthic invertebrate samples were collected concurrently with various environmental parameters at three locations (zones A-C) of Kenyir Lake, Malaysia. Our results affirmed that the northeast part of Lake Kenyir is oligotrophic. Abundance of phytoplankton, total suspended solids, phosphate, nitrite and nitrate drive the abundance of various groups of benthic invertebrates. All of these extrinsic variables (except phosphate) negatively influenced the density of Trichoptera and positively influenced (P<0.05) the densities of Polychaeta, Oligochaeta, Bivalvia, Gastropod, Isopoda and Copepod in all zones. Phosphate negatively influenced the density of Trichoptera and positively influenced (P<0.05) the densities of Oligochaeta, Bivalvia and Copepod. Its influences on the Polychaeta, Gastropod and Isopoda densities were zone-specific. Overall, seasons equally influenced the relationships between extrinsic and response variables in all zones. The results of this study are useful to evaluate the lake's environmental quality, in conservation and in similar projects involving environmental handling, monitoring and recovery.

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Distribution of Chironomidae in a Semiarid Intermittent River of Brazil

2012

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The effects of the intermittency of water flow on habitat structure and substrate composition have been reported to create a patch dynamics for the aquatic fauna, mostly for that associated with the substrate. This study aims to describe the spatial distribution of Chironomidae in an intermittent river of semiarid Brazil and to associate assemblage composition with environmental variables. Benthic invertebrates were sampled during the wet and dry seasons using a D-shaped net (40 cm wide and 250 μm mesh), and the Chironomidae were identified to genus level. The most abundant genera were Tanytarsus, Polypedilum, and Saetheria with important contributions of the genera Procladius, Aedokritus, and Dicrotendipes. Richness and density were not significantly different between the study sites, and multiple regression showed that the variation in richness and density explained by the environmental variables was significant only for substrate composition. The composition of genera showed significant spatial segregation across the study sites. Canonical Correspondence Analysis showed significant correspondence between Chironomidae composition and the environmental variables, with submerged vegetation, elevation, and leaf litter being important predictors of the Chironomidae fauna. This study showed that Chironomidae presented important spatial variation along the river and that this variation was substantially explained by environmental variables associated with the habitat structure and river hierarchy. We suggest that the observed spatial segregation in the fauna results in the high diversity of this group of organisms in intermittent streams.

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Insetos aquáticos do açude São José dos Cordeiros (semi-árido paraibano) com ênfase em Chironomidae

Cited by 10 publications

References 6 publications

Aquatic systems in semi-arid Brazil: limnology and management

Aquatic systems in semi-arid Brazil: limnology and management

Influences of environmental parameters and phytoplankton productivity on benthic invertebrates in a tropical oligotrophic lake, northern Malaysia

Distribution of Chironomidae in a Semiarid Intermittent River of Brazil

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