重新审视储层纵向梯度的概念

Q2 Environmental Science Acta Limnologica Brasiliensia Pub Date : 2020-01-01 DOI:10.1590/s2179-975x1319
F. M. Carneiro, L. M. Bini
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引用次数: 8

摘要

摘要:在以水电为主要能源的国家,水库是一种越来越普遍的水生生态系统类型。了解这些系统的运作对于制定监测战略或优先使用这些系统至关重要。本研究的主要目的是测试储层中是否存在纵向梯度。方法收集17个热带水库的主要轴线数据,测试不同生态指标(如浊度、营养物浓度和浮游植物丰度)与大坝距离的关系。之后,我们测试了纵向梯度的强度是否与一组解释变量(水库级联中的发生率、大坝附近的支流、土地利用、形态和水库年龄)有关。结果我们没有发现我们的生态指标集与大坝距离之间的显著关系,这些关系的强度与解释变量的预测不一致。然而,不同的指标显示出与预期一致的模式。结论与大坝的距离不能一致地预测热带水库不同湖泊变量的空间变化,显示出高度的环境依赖性。
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Revisiting the concept of longitudinal gradients in reservoirs
Abstract: Aim Reservoirs are an increasingly common type of aquatic ecosystem in countries where hydropower is a dominant energy source. Understanding the functioning of these systems is essential to establish monitoring strategies or priorities for their use. The main goal of this study was to test for the presence of longitudinal gradients in reservoirs. Methods We gathered data along the main axes of 17 tropical reservoirs to test the relationship between different ecological indicators (e.g., turbidity, nutrient concentrations, and phytoplankton abundance) and distance to the dam. After, we tested whether the strengths of longitudinal gradients were related to a set of explanatory variables (occurrence in a reservoir cascade, presence of tributaries near the dam, land-use, morphology and reservoir age). Results We did not find significant relationships between our set of ecological indicators and distance to the dam and the strengths of these relationships were not consistently predicted by the explanatory variables. However, different indicators suggested patterns consistent with expectations. Conclusion The distance to the dam is not a consistent predictor of the spatial variation of different limnological variables in tropical reservoirs, highlighting a high degree of context-dependency.
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来源期刊
Acta Limnologica Brasiliensia
Acta Limnologica Brasiliensia Environmental Science-Ecology
CiteScore
2.20
自引率
0.00%
发文量
17
审稿时长
50 weeks
期刊最新文献
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