Development and application of a hybrid model to analyze spatial distribution of macroinvertebrates under flow regulation in the Lijiang River

Chen, Qiuwen; Yang, Qingrui; Lin, Yuqing

doi:10.1016/j.ecoinf.2011.08.001

Cited by 12 publications

(6 citation statements)

References 47 publications

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“…Dams provide considerable social and economic benefits to human society, such as those produced by irrigation and hydroelectric power (Richter and Thomas, 2007). Although dams bring prosperity, they are cited as the most significant and incessant threat to freshwater ecosystems globally (Bunn and Arthington, 2002;Chen et al, 2011). Dams alter natural flow regimes, sediment transport, water quality, channel morphology, stream temperature, and nutrient cycles, and they also obstruct dispersal and the migration of macroinvertebrates and fish communities (Castro et al, 2013;Li et al, 2013;White et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Aquatic Macroinvertebrate Community Changes Downstream of the Hydropower Generating Dams in Myanmar-Potential Negative Impacts From Increased Power Generation

Ko¹,

Suter²,

Conallin³

et al. 2020

Front. Water

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Intensive and incessant disruptions in watercourses such as dams are taking place due to the growing demand for hydroelectric generation, and can result in severe deterioration of ecosystem integrity. This research concentrates on the impact of dams on macroinvertebrate communities downstream of two hydropower dams on tributaries of the upper Ayeyarwady River basin (Myitnge and Chaungmagyi Rivers) in Myanmar. A total of 52 and 49 aquatic invertebrate taxa with a total abundance of 2,743 and 1,356 were collected from the Myitnge and Chuangamgyi Rivers, respectively. We found the natural flow regime had changed in both study rivers after the construction of the dams. Analysis of similarity (ANOSIM) indicated the communities of morphospecies of taxa and the very sensitive insects (Ephemeroptera, Plecoptera, Trichoptera, and Odonata, EPTO) were significantly different between upstream and downstream of both dams. We used the preliminary Myanmar Aquatic Biomonitoring Assessment Index (MABA) detect ecological water quality. The MABA analysis using all taxa at family-level showed that upstream of the dams was rated as good quality whereas downstream of the dams was rated as fair quality. Our research showed that macroinvertebrates communities can be used as a bioindicator to detect the impact of human influences on river health such as dams. We concluded that the novel biomonitoring assessment tool recently developed for Myanmar is a promising monitoring tool as further river development occurs in Myanmar, which could also be linked to citizen science projects.

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Section: Introductionmentioning

confidence: 99%

Aquatic Macroinvertebrate Community Changes Downstream of the Hydropower Generating Dams in Myanmar-Potential Negative Impacts From Increased Power Generation

Ko¹,

Suter²,

Conallin³

et al. 2020

Front. Water

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“…The flow rate of Lijiang River varies between 12 m 3 /s and 8,000 m 3 /s in different conditions, and the annual average discharge is about 120 m 3 /s (Chen et al, 2011). The climate of the basin is typically a subtropical monsoon with annual average temperature and rainfall of 19.3 °C and 1,930 mm, respectively.…”

Section: Study Areamentioning

confidence: 99%

Plankton distribution patterns and the indicative significance of diverse cave wetlands in subtropical karst basin

Guo

Jiang

Liu

2022

Front. Environ. Sci.

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In subtropical karst area, small wetlands are widely distributed owing to the well-developed karst and the high degree of groundwater-surface water interaction. However, detailed plankton community composition, spatial-temporal dynamics, and its assembly mechanism were rarely discussed. To address these, plankton distribution patterns and its relationship with hydrological conditions and environment gradients were analyzed to discover the biological characteristics of wetlands in a typical karst basin in South China. The results showed that the wetlands were diverse in types due to the hydrogeological background. Water quality evaluation according to major ions analyses showed good results, with significant differences among samples and a poor status when measured by biotic indicator such as Escherichia coli. During high and low-flow condition, a total of 163 and 162 species of phytoplankton, and a total of 62 and 36 species of zooplankton, respectively were observed. The dominant species of phytoplankton communities in low-flow condition metamorphosed from Cyclotella sp. to Navicula sp. and Cocconeis placentula; and Pediastrum simplex to Ankistrodesmus spiralis. The metamorphosis in zooplankton community was from Difflugia globulosa to Strobilidium sp. Comparing with other karst water in different climate regimes, the number of plankton species in the subtropical karst wetland was the highest, which is related to the high and stable water temperature, large karst underground spaces, and frequent interaction between groundwater and surface water. The abundance, biomass and community semblance of plankton were increased with an increase in nutrients, precipitating improvement in hydrodynamics and light intensity. This study also suggested that the plankton in karst cave wetlands in subtropical area were characterized by low diversity, attributable to the calcium-rich and weakly alkaline, but poor nutrient status of the water environment, as well as drew attention to the possible functions of wetlands in relation to the quality of connected river.

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“…The Qingshitan Reservoir has a capacity of 3.70×10 , 2011bYe et al, 2010;Chen et al, 2011). Following the increasing awareness of river conservation, the operations should be adapted to take into account the ecosystem requirements.…”

Section: Description Of Study Casementioning

confidence: 99%

Optimizing the operation of the Qingshitan Reservoir in the Lijiang River for multiple human interests and quasi-natural flow maintenance

Chen

Duan

Han

et al. 2012

Journal of Environmental Sciences

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For reservoir operation, maintaining a quasi-natural flow regime can benefit river ecosystems, but may sacrifice human interests. This study took the Qingshitan Reservoir in the Lijiang River as a case, and developed an optimization model to explore a trade-off solution between social-economic interests and nature flow maintenance on a monthly base. The objective function considered irrigation, cruise navigation and water supply aspects. An index of flow alteration degree was proposed to measure the difference between the regulated discharge and the natural flow. The index was then used as an additional constraint in the model besides the conventional constraints on reservoir safety. During model solving, different criteria were applied to the index, representing various degrees of alteration of the natural flow regime in the river. Through the model, a relationship between social-economic interests and flow alteration degree was established. Finally, a trade-off solution of the reservoir operation was defined that led to a favorable social-economic benefit at an acceptable alteration of the natural flow.

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Development and application of a hybrid model to analyze spatial distribution of macroinvertebrates under flow regulation in the Lijiang River

Cited by 12 publications

References 47 publications

Aquatic Macroinvertebrate Community Changes Downstream of the Hydropower Generating Dams in Myanmar-Potential Negative Impacts From Increased Power Generation

Aquatic Macroinvertebrate Community Changes Downstream of the Hydropower Generating Dams in Myanmar-Potential Negative Impacts From Increased Power Generation

Plankton distribution patterns and the indicative significance of diverse cave wetlands in subtropical karst basin

Optimizing the operation of the Qingshitan Reservoir in the Lijiang River for multiple human interests and quasi-natural flow maintenance

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