Effects of natural banks of free-floating plants on zooplankton community in a shallow subtropical lake in Southern Brazil

Gazulha, Vanessa; Montu, M.; Marques, David da Motta; Bonecker, Cláudia Cósta

doi:10.1590/s1516-89132011000400014

Cited by 11 publications

(6 citation statements)

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“…Considering our results and the fact that free-floating macrophytes host rich macroinvertebrate and fish communities Meerhoff et al, 2007;Fontanarrosa et al, 2012), within the frame of environmental heterogeneity and following the concepts by Tews et al (2004), we propose that free-floating macrophytes constitute 'key structures' in vegetated floodplain shallow lakes, as they determine a quantitative change on the diversity of a variety of groups. Although the role of free-floating macrophytes as zooplankton hosts has been explored (Serafim et al, 2003;Gazulha et al, 2011;Villabona-González et al, 2011), rotifers were seldom considered, even though they are usually the most abundant and diverse group in subtropical and temperate shallow lakes (Meerhoff et al, 2003;Iglesias et al, 2007;Meerhoff et al, 2007). More diverse communities comprise species with different strategies to exploit resources and thus are more efficient and stable (Ptacnik et al, 2008;Cleland, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Emergent macrophytes play a similar role, especially in turbid ecosystems, where submerged macrophytes are limited (Iglesias et al ., ; Cazzanelli et al ., ). Finally, free‐floating macrophytes reduce light penetration and oxygen availability in the water column (de Tezanos Pinto et al ., ; O'Farrell et al ., ) and while reducing phytoplankton diversity (O'Farrell et al ., ) are associated to rich communities of zooplankton (Serafim et al ., ; Gazulha et al ., ; Villabona‐González et al ., ), macroinvertebrates (Poi de Neiff, ; Fontanarrosa et al ., ) and fishes (Agostinho et al ., ; Teixeira de Mello et al ., ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

2013

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Environmental heterogeneity is an essential quality of ecosystems as it has important implications in community structure. Macrophytes are a main component of environmental heterogeneity in floodplain lakes, and their dynamics are highly influenced by water level changes. In this context, we analysed at different spatial scales the relationship among hydrological variations, environmental heterogeneity associated to macrophytes and zooplankton regional diversity (γ diversity) in a South American floodplain lake adjacent to the Paraná River, and we also compared the local zooplankton diversity (α diversity) among the different environments that comprised the lake heterogeneity. At very low waters, the environmental heterogeneity was reduced as the lake was mainly limited to open water areas with low zooplankton diversity. At high waters, the profuse vegetation development (emergent and free‐floating), in mixed or homogeneous patches, determined a higher lake environmental heterogeneity with enhanced regional zooplankton diversity; littoral species increased over limnetic ones. Zooplankton α diversity was higher in environments with free‐floating macrophytes than in those without these plants. The structural complexity in the water column provided by plant roots would be closely related to the enhanced diversity found under free‐floating mats. This study contributes to the knowledge on the effects of strong water level variations on environmental heterogeneity, which is strongly associated to macrophytes and on zooplankton diversity, and highlights the role of free‐floating plants as diversity hosts and ‘key structures’ in floodplain lakes. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

2013

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“…Outros estudos revelam que a alelopatia exercida pelas macrófitas pode afetar cianobactérias (Nakia et al, 1999), o fitoplâncton (Mulderij et al, 2005), macroinvertebrados e o zooplâncton (Gopal & Goel, 1993). Gazulha et al (2011), em um lago tropical, encontraram uma densidade alta de microcrustáceos em macrófitas flutuantes, contradizendo o efeito da alelopatia sobre a distribuição dos microcrustáceos.…”

Section: O Principal Fator Que Influencia O Crescimento E a Reproduçãunclassified

Variação espacial e temporal de microcrustáceos planctônicos do lago Monte Alegre e experimentos abordando a influência da qualidade do alimento sobre o desempenho dos cladóceros

Souza¹

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analisar a influência da quantidade e qualidade do alimento sobre os parâmetros de tabela de vida de duas espécies de cladóceros encontradas no lago, utilizando o séston de cada zona. Fatores físicos e químicos do séston também foram avaliados no período dos experimentos. D. birgei mostrou preferência pela zona litorânea e D. ambigua pela zona limnética, enquanto C. richardi e D. gessneri não apresentaram preferência significativa.A qualidade do alimento não influenciou de maneira negativa o desenvolvimento de C. richardi e D. birgei, no período dos experimentos, podendo não ser o fator responsável por sua distribuição no lago. Já D. birgei apresentou diferenças significativas entre as zonas, quanto ao total de neonatos por fêmea, fecundidade média e máximo de neonatos por prole. Dessa maneira, a zona litorânea do lago Monte Alegre mostrou-se propícia ao desenvolvimento de cladóceros planctônicos; a qualidade do séston nesta zona não influencia de maneira negativa os parâmetros de tabela de vida de C. richardi e D. birgei. Palavras-chave: Zooplâncton, Tabela de vida, Séston, Variação espacial, Cladóceros ABSTRACTThis work is divided into two chapters. The first deals with the spatial distribution of planktonic microcrustaceans in the littoral and limnetic zones of the Lake Monte Alegre, located in Ribeirão Preto, São Paulo, and the influence of abiotic and biotic factors on the development and distribution. This chapter uses data from , concerning the limnetic zone and is a manuscript to be submitted for publication; the data analyzed in this study were those related to the littoral zone, as well as all the statistical analysis for comparison between the two zones. Weekly samples of zooplankton and their invertebrate predators, obtained in the same period in both zones were analyzed for one year, with the aim of studying the fluctuation throughout the year, its reproduction and which species of planktonic microcrustaceans occupy the littoral; physical and chemical factors were evaluated in the same period of the plankton samples to determine the conditions for the organisms in the two zones. The most abundant planktonic microcrustaceans distributed in both zones, Bosmina tubicen and Diaphanosoma birgei showing preference for the littoral, while Daphnia gessneri was more abundant in the limnetic zone and Ceriodaphnia richardi and Daphnia ambigua were indifferent, regarding both zones. Copepods occupied preferentially the pelagic zone. Higher concentration of algal carbon was recorded in the limnetic zone in relation to the littoral zone, but some algae may have indigestible features. Our data indicate that the shoreline of the lake has favorable conditions for the development of planktonic cladocerans, and the preference of some species for this area could be a strategy to reduce predation by limnetic invertebrates. Although the littoral has other predators, mortality in the limnetic zone might be higher. Chapter two presents the horizontal distribution of planktonic microcrustaceans, especially cladocerans, in t...

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“…In the case of cladoceran fauna, data are available in the scientific literature for the Emas National Park (Sousa and Elmoor-Loureiro 2008), Ecological Station of Taim (Gazulha et al 2011) and some smaller protected areas in Minas Gerais and São Paulo Santos-Wisniewski et al 2011). These studies provided important information for understanding the biodiversity of cladocerans in areas designated for conservation, however, an extension of studies in these areas, with systematic sampling, is important to have a data set of reference areas.…”

Section: Introductionmentioning

confidence: 99%

Cladocerans (Crustacea: Anomopoda and Ctenopoda) of the Sempre Vivas National Park, Espinhaço Range, Minas Gerais, Brazil

Sousa¹,

Elmoor-Loureiro²

2013

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Protected areas are designed to maintain environmental conditions that favor the occurrence of a wide variety of taxa. However, few studies have devoted attention to inventories of biota in these areas. In this study, we provide a checklist of cladocerans for the poorly studied Sempre Vivas National Park, Minas Gerais state. Samples were collected in lotic and lentic environments, with a total of 27 species being recorded and the highest contribution coming from the Chydoridae family (21 spp.). Minas Gerais state is widely studied in relation to cladoceran fauna; nevertheless, the results indicate three new records. The genus Monospilus was reported for the first time in the Neotropical region.

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Effects of natural banks of free-floating plants on zooplankton community in a shallow subtropical lake in Southern Brazil

Abstract: The aim of this study was to test the effects of natural free-floating plants on zooplankton distribution in a shallow

Cited by 11 publications

References 27 publications

Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

Variação espacial e temporal de microcrustáceos planctônicos do lago Monte Alegre e experimentos abordando a influência da qualidade do alimento sobre o desempenho dos cladóceros

Cladocerans (Crustacea: Anomopoda and Ctenopoda) of the Sempre Vivas National Park, Espinhaço Range, Minas Gerais, Brazil

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