Testate amoebae as indicators for suspended inorganic material in floodplains influenced by dam

IF 0.9 3区生物学 Q3 MARINE & FRESHWATER BIOLOGY

International Review of Hydrobiology Pub Date : 2019-01-11 DOI:10.1002/iroh.201801949

Leilane T. F. Schwind, Rodrigo L. Arrieira, Tatiane Mantovano, Luiz F. M. Velho, Claudia C. Bonecker, Fábio A. Lansac-Tôha

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引用次数: 3

Abstract

The construction of reservoirs impacts upon freshwater ecosystems, since it changes the hydrodynamics of the entire system upstream and downstream of the dam due to flow control and changes in environmental conditions. We analyzed the temporal variation in the abundance of exogenous testate amoebae related to the suspended inorganic material in Neotropical floodplain lakes, downstream of a series of dams. Sampling was carried out between 2000 and 2012 in six lakes in the upper Paraná River floodplain. The temporal variation in the abundance of the testate amoeba community was analyzed using the Threshold Indicator Taxa Analysis. Cucurbitella crateriformis, Protocucurbitella coroniformes, and C dentata f. quinquilobata had reduced population growth in higher concentrations of suspended inorganic material. On the other hand, Difflugia lobostoma, Centropyxis ecornis, and Difflugia pseudogramen populations increased under these conditions. These results showed that an increased flow of water could favor the growth of some populations due to the greater exchange of material between the lakes and the floodplain. The positive or negative responses could show better adaptation of the testate amoeba species to the planktonic environment. Furthermore, these results also highlighted the bioindicator role of these protozoa in aquatic ecosystems.

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受大坝影响的洪泛平原中悬浮无机物的示踪性变形虫

水库的建设对淡水生态系统产生影响，由于流量控制和环境条件的变化，大坝上下游整个系统的水动力发生了变化。我们分析了新热带洪泛平原湖泊中与悬浮物有关的外源变形虫丰度的时间变化。2000年至2012年期间，在帕拉纳河上游洪泛区的六个湖泊进行了采样。利用阈值指标分类群分析分析了遗存阿米巴原虫群落丰度的时间变化。在悬浮物浓度较高的环境下，标准葫芦、冠状原葫芦和齿状拟葫芦的种群增长明显下降。另一方面，在这些条件下，白叶散花、经济中心散花和假叶散花的种群数量增加。这些结果表明，由于湖泊和洪泛区之间的物质交换增加，水流的增加可能有利于某些种群的生长。阳性或阴性的反应表明，无卵变形虫对浮游环境有较好的适应能力。此外，这些结果也突出了这些原生动物在水生生态系统中的生物指示作用。

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来源期刊

International Review of Hydrobiology 生物-海洋与淡水生物学

CiteScore

4.10

自引率

10.50%

发文量

审稿时长

3 months

期刊介绍： As human populations grow across the planet, water security, biodiversity loss and the loss of aquatic ecosystem services take on ever increasing priority for policy makers. International Review of Hydrobiology brings together in one forum fundamental and problem-oriented research on the challenges facing marine and freshwater biology in an economically changing world. Interdisciplinary in nature, articles cover all aspects of aquatic ecosystems, ranging from headwater streams to the ocean and biodiversity studies to ecosystem functioning, modeling approaches including GIS and resource management, with special emphasis on the link between marine and freshwater environments. The editors expressly welcome research on baseline data. The knowledge-driven papers will interest researchers, while the problem-driven articles will be of particular interest to policy makers. The overarching aim of the journal is to translate science into policy, allowing us to understand global systems yet act on a regional scale. International Review of Hydrobiology publishes original articles, reviews, short communications, and methods papers.