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The reasons for the degradation of urban lake ecosystems
The reasons for the degradation of urban lake ecosystems
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The reasons for the degradation of urban lake ecosystems
The lake ecosystem is a complex integrated system that reflects the evolution of the lake ecosystem through the interactions, migration, and transformation between basins and watersheds, their water bodies, sediments, and various organic and inorganic substances. It involves natural processes and human activities that interfere and intervene.
At present, the eutrophication process of lakes in China is mainly caused by human activities, which refers to the process of lakes changing from a lower nutrient state to a higher nutrient state due to the enrichment of nutrients. This process may lead to the inhibition of the growth of aquatic plants; Decline in biodiversity; The outbreak of blue-green algae blooms can even cause the rapid disappearance of submerged plants and the sudden appearance of turbid water dominated by planktonic algae. That is to say, eutrophication of lakes refers to the process in which the accumulation of nutrients leads to the degradation of the lake ecosystem and the deterioration of water quality. The enrichment of nutrients, including external inputs such as human activities and disturbances, wetland subsidence, and the physical, chemical, and biological processes of endogenous enrichment and release, is the fundamental element of eutrophication in lakes. Its different stages of development can be described by the classification indicators of lake nutrient status.
The degradation of lake ecosystems is an intermediate stage in the development of eutrophication in lakes, a complex process of life evolution, and has positive and negative feedback effects at different stages; The deterioration of water quality is the result of eutrophication in lakes, which can be quantitatively described as a dynamic and continuous process using surface water quality evaluation standards, rather than a static state. However, at different stages of this dynamic and continuous process, quantitative state indicators can be used to express it; Meanwhile, nutrients, ecosystems, and water quality in lakes are inseparable components of the eutrophication process and form a dynamic whole.
At present, the eutrophication process of lakes in China is mainly caused by human activities, which refers to the process of lakes changing from a lower nutrient state to a higher nutrient state due to the enrichment of nutrients. This process may lead to the inhibition of the growth of aquatic plants; Decline in biodiversity; The outbreak of blue-green algae blooms can even cause the rapid disappearance of submerged plants and the sudden appearance of turbid water dominated by planktonic algae. That is to say, eutrophication of lakes refers to the process in which the accumulation of nutrients leads to the degradation of the lake ecosystem and the deterioration of water quality. The enrichment of nutrients, including external inputs such as human activities and disturbances, wetland subsidence, and the physical, chemical, and biological processes of endogenous enrichment and release, is the fundamental element of eutrophication in lakes. Its different stages of development can be described by the classification indicators of lake nutrient status.
The degradation of lake ecosystems is an intermediate stage in the development of eutrophication in lakes, a complex process of life evolution, and has positive and negative feedback effects at different stages; The deterioration of water quality is the result of eutrophication in lakes, which can be quantitatively described as a dynamic and continuous process using surface water quality evaluation standards, rather than a static state. However, at different stages of this dynamic and continuous process, quantitative state indicators can be used to express it; Meanwhile, nutrients, ecosystems, and water quality in lakes are inseparable components of the eutrophication process and form a dynamic whole.
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