Floods decrease zooplankton beta diversity and environmental heterogeneity in an Amazonian floodplain system

被引:0
作者
Reinaldo Luiz Bozelli
Sidinei Magela Thomaz
André Andrian Padial
Paloma Marinho Lopes
Luis Mauricio Bini
机构
[1] Universidade Federal do Rio de Janeiro,Departamento de Ecologia
[2] Universidade Estadual de Maringá,Departamento de Botânica
[3] Nupelia,Laboratório de Ecologia Teórica e Síntese
[4] PEA-UEM,undefined
[5] Universidade Federal do Paraná,undefined
[6] Universidade Federal de Goiás,undefined
来源
Hydrobiologia | 2015年 / 753卷
关键词
Flood pulse; Habitat heterogeneity; Flood homogenization; Large rivers;
D O I
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中图分类号
学科分类号
摘要
Floods are major determinants of ecological patterns and processes in river-floodplain systems. Although some general predictions of the effects of water level changes on ecological attributes have been identified, specific tests using the flood pulse concept are scarce, mainly in tropical areas, where large river-floodplain systems abound. We tested the hypothesis that floods decrease environmental and biological variability using data from a near-pristine floodplain in Central Amazon (Brazil). We recorded nine limnological variables and the zooplankton community structure at eleven sites during one low and one high water period. During the low water period, when the levels of hydrological connectivity were low, asynchronous processes (e.g., sediment disturbance by biota, decomposition, and predation) likely determined the large environmental and biological heterogeneity in the floodplain. On the other hand, environmental variability and zooplankton beta diversity were significantly decreased by the flood. We postulate that floods act as “rubber erasers”, reducing the environmental and ecological idiosyncrasies created during low water periods. Also, we suggest that dilution effects and enhanced connectivity during the high water period, along with species sorting during the low water period, may determine zooplankton beta diversity patterns in river-floodplain systems.
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页码:233 / 241
页数:8
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  • [1] Algarte VM(2014)Variance partitioning of deconstructed periphyton communities: does the use of biological traits matter? Hydrobiologia 722 279-290
  • [2] Rodrigues L(2006)Distance-based tests for homogeneity of multivariate dispersions Biometrics 62 245-253
  • [3] Landeiro VL(2006)Multivariate dispersion as a measure of beta diversity Ecology Letters 9 683-693
  • [4] Siqueira T(2005)Diversity and abundance of the planktonic rotifers in different environments of the Upper Paraná River floodplain (Paraná State – Mato Grosso do Sul State, Brazil) Hydrobiologia 546 405-414
  • [5] Bini LM(1992)Composition of the zooplankton community of Batata and Mussurá lakes and of the Trombetas River, Brazil Amazoniana 12 239-261
  • [6] Anderson MJ(1994)Zooplankton community density in relation to water fluctuation and inorganic turbidity in an Amazonian lake, Lago Batata, State of Pará, Brazil Amazoniana 13 17-32
  • [7] Anderson MJ(2009)Interactive effects of environmental variability and human impacts on the long-term dynamics of an Amazonian floodplain lake and a South Atlantic coastal lagoon Limnologica 39 306-313
  • [8] Ellingsen KE(1978)The relationship between the water level of the Amazon River and the fate of the zooplankton population in Lago Jacaretinga e varzea lake in Central Amazon Studies on Neotropical Fauna and Environment 13 63-70
  • [9] McArdle BH(2002)Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity Environmental Management 30 492-507
  • [10] Bonecker CC(2001)Comparative limnology of South-American lakes and lagoons Acta Scientiarum 23 265-273