The influence of environmental parameters in the structure of the benthic community in coastal lakes and lagoons of Rio Grande do Sul, Brazil

Würdig, Norma Luiza; Albertoni, Edélti Faria; Ozorio, Carla Penna; Wiedenburg, S.; Rodrigues, Gilberto Gonçalves

doi:10.1080/03680770.1995.11900981

Cited by 3 publications

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“…This was subjected to the spatial variability of physics and chemical variables of the lagoon, primarily to the characteristics of sediment and local depth. In fact, studies on lentic ecosystems came to the conclusion that environmental factors such as organic matter content in sediment (Würdig et al, 1998;Cartier et al, 2010) and grain sizes (Cenzano and Würdig, 2006;Würdig et al, 2007) are considered explanatory variables for density and distribution of benthic community. In the other hand, size and habitat structure seems to play an important role on invertebrate community composition (Heino, 2000), and even water temperature and influence of macrophytes could have a key role structuring this community (Kevrekidis, 2004).…”

Section: Discussionmentioning

confidence: 99%

Aquatic invertebrate's distribution in a freshwater coastal lagoon of southern Brazil in relation to water and sediment characteristics

2011

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Abstract:Aim: The objective of this study was to evaluate the influence of water and sediment characteristics on the abundance, richness and diversity of the benthic invertebrate community in Peri lagoon, a freshwater coastal lagoon located in central coast of Santa Catarina State; Methods: Samplings were performed in April, May and June 2009, in five different sites of Peri lagoon. The samples were taken with an EckmanBirge drag, totalizing 60 for the invertebrate community, and 45 for sediment. Water physicochemical variables were also measured. Environmental influences in benthic community have been measured using a Canonical Correspondence Analysis (CCA). Linear regressions were also plotted for main correlations; Results: A total of 5,535 specimens were collected, identified into 18 taxa. Tanaidacea was the most abundant representing 54% of relative abundance, followed by Diptera (23%), and Ostracoda (17%). The richest family was Chironomidae with 6 taxa. CCA results indicated positive correlation between Chaoborus and Stenocypris with local depth, and negative correlation between Odonata, Gastropoda, Cytheridella and Coleoptera with the finest grains of sediment, as well as between Tanaidacea, Lopescladius, Annelida and Nematoda with both organic matter (OM) content in sediment and local depth. Linear regression analysis demonstrated inverse relation of Tanaidacea in response to OM (y = 0.6 -0.62.OM) and sand (y = 0.6 -0.6.sand), and of Lopescladius in response to OM (y = 0.37 -0.41. OM) and sand (y = 0.37 -0.46.sand). The fact that Peri lagoon has no marine influence and has Tanaidacea as the most abundant taxa, a group not expected in freshwaters, gives to this lagoon a particular relevance among coastal lagoons. The study concluded that sediment characteristics and local depth are more significant than water variables in determining the benthic community structure in Peri lagoon, which varied in accordance with different local conditions.

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Section: Discussionmentioning

confidence: 99%

Aquatic invertebrate's distribution in a freshwater coastal lagoon of southern Brazil in relation to water and sediment characteristics

2011

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“…Aquatic macrophytes are an extremely important community in these environments and possess rich associated macroinvertebrate fauna. Studies of the macroinvertebrate community of the northern part of the state's coastal plain have been conducted by Albertoni (1990), Albertoni and Würdig (1996) and Würdig et al (1990Würdig et al ( , 1998 and to the southern region by Prellvitz and Albertoni (2004) and Albertoni et al (2005).…”

Section: Introductionmentioning

confidence: 99%

Macroinvertebrate fauna associated with Pistia stratiotes and Nymphoides indica in subtropical lakes (south Brazil)

Palma‐Silva

2007

Braz. J. Biol.

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This study was carried out at the Biguás and Polegar lakes, both small environments but at different successional stages. The main objective was to characterize the macroinvertebrate community associated to the aquatic macrophyte stand in each lake in order for this community, the environmental conditions and their water quality to interact. The samples were taken in 2003. The abiotic variables of N and P totals, the temperature, electrical conductivity, pH and dissolved oxygen, as well as the determined clorophyll a concentration were measured. Macroinvertebrates were sampled with a 500 µ mesh size net, separated under a stereomicroscope and identified at the lowest possible taxonomic level, and their densities were shown as the number of individuals per 100 g of macrophyte dry weight. The Shannon-Wiener Diversity Index (H'), Pielou evenness (J), frequency of occurrence, abundance and taxa richness were calculated for each invertebrate community. The Lago dos Biguás is undergoing a process of eutrophication and during the study presented a large Pistia stratiotes stand. The Lago Polegar is oligotrophic and had only a small Nymphoides indica bankwe. The macrophyte associated invertebrate communities in each lake were considered significantly different (p < 0.05). Sixty seven taxa were found for the Lago dos Biguás and 32 for the Lago Polegar. For both lakes, most of the taxa were considered rare, with a low dominance in a few months. The taxa with highest densities at Lago dos Biguás were Chironomidae, Daphniidae and Cyclopidae, and Oligochaeta, Chironomidae and Coenagrionidae for Lago Polegar.Keywords: macroinvertebrates associated with macrophytes, communities, subtropical lakes. Fauna de macroinvertebrados associados a Pistia stratiotes e Nymphoides indica em lagos subtropicais (sul do Brasil) ResumoEste estudo foi realizado nos lagos dos Biguás e Polegar, ambientes de pequenas dimensões que se encontram em diferentes estágios sucessionais. O objetivo principal foi caracterizar a comunidade de macroinvertebrados, que vive associada ao estande de macrófitas aquáticas encontrado em cada um dos lagos, na tentativa de obter relações entre a comunidade, a saúde dos ambientes e a qualidade de água. As coletas foram feitas durante o ano de 2003. Em cada lago, foram avaliadas as concentrações de N e o P totais, o pH, temperatura, oxigênio dissolvido, condutividade elétri-ca, e determinadas as concentrações de clorofila a na água. A malha utilizada para a separação dos macroinvertebrados foi de 500 µ e os resultados de densidade foram expressos em 100 gramas de peso seco de macrófita. A triagem foi realizada sob estereomicroscópio e os organismos identificados até o menor nível taxonômico possível. Para cada comunidade foram calculados o Índice de Diversidade de Shannon-Wiener (H'), a homogeneidade de Pielou (J), a freqüência de ocorrência, a abundância e a riqueza de taxa. O Lago dos Biguás, em processo de eutrofização, apresentou durante o período estudado um grande estande de Pistia stratiotes. O Lago Poleg...

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The influence of environmental parameters in the structure of the benthic community in coastal lakes and lagoons of Rio Grande do Sul, Brazil

Cited by 3 publications

References 1 publication

Aquatic invertebrate's distribution in a freshwater coastal lagoon of southern Brazil in relation to water and sediment characteristics

Aquatic invertebrate's distribution in a freshwater coastal lagoon of southern Brazil in relation to water and sediment characteristics

Macroinvertebrate fauna associated with Pistia stratiotes and Nymphoides indica in subtropical lakes (south Brazil)

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