Study on the driving effect of attached algae growth on the degradation of submerged macrophytes in HCO3-Ca karst lake

doi:10.14088/j.cnki.issn0439-8114.2023.04.004

Abstract

Abstract: Taking Lingshui Lake, a typical HCO₃-Ca type submerged vegetation degraded karst lake, as the research object, through the laboratory simulation experiment of adding Ca²⁺ and HCO₃^- concentration gradient, the change of chlorophyll a concentration of submerged macrophytes attached algae under different nitrogen and phosphorus nutrient concentration levels was explored. The results showed that adding only Ca²⁺ or HCO₃^- in different groups could promote the increase of algae chlorophyll a concentration under different nitrogen and phosphorus nutrient levels. Adding Ca²⁺ and HCO₃^- in different groups also significantly promoted the growth of attached algae, and showed an increasing trend with the increase of nitrogen and phosphorus nutrient concentration.

Key words: karst water ecosystem, degradation of submerged macrophytes, attached algae, Lingshui Lake

CLC Number:

CHAI Xiao-zhen, LIU Shu-min. Study on the driving effect of attached algae growth on the degradation of submerged macrophytes in HCO₃-Ca karst lake[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(4): 20-26.

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Study on the driving effect of attached algae growth on the degradation of submerged macrophytes in HCO₃-Ca karst lake

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