4.7 Article

Application of Microalgae Assemblages' Parameters for Ecological Monitoring in Mangrove Forest

期刊

FRONTIERS IN MARINE SCIENCE
卷 9, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fmars.2022.872077

关键词

alpha-diversity indices; algal pollution indices; mangrove forest; trophic state index; coastal water

资金

  1. National Key Research and Development Program of China [2017FY100700]
  2. National Natural Science Foundation of China [U1901211, 41876126]
  3. International Partnership Program of Chinese Academy of Sciences [133244KYSB20180012]
  4. Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) [GML2019ZD0305]
  5. Strategic Priority Research Program of Chinese Academy of Sciences [XDA23050200, XDA19060201]

向作者/读者索取更多资源

This study investigated the dynamics of algal diversity and algal pollution indices in a mangrove forest in Guangdong, China, and their relationship with trophic state. The results showed that environmental conditions and trophic state significantly influenced the diversity and pollution indices of algae. The main factors affecting algal assemblages were pH, total dissolved solids, salinity, electrical conductivity, turbidity, nitrate, and phosphate.
Although the relationship between biodiversity and ecological functioning is a vital issue in coastal water ecology, how this relationship is influenced by environmental conditions is still unknown. It was investigated for the dynamics of algal diversity and algal pollution indices, as well as their relationships with trophic state, in a mangrove forest along the Guangdong coast, South China. It is hypothesized that the phytoplankton alpha-diversity indices and algal pollution indices have the potential to provide a signal linking trophic state and water quality variation in the mangrove forest. The t-test showed that phytoplankton alpha-diversity indices and algal pollution indices varied significantly between the dry and wet seasons (p < 0.01 or p < 0.05). The trophic state index record confirmed that the mangrove forest was mesotrophic to eutrophic during study periods while the CCME: WQI revealed that the water quality in the forest was under poor and marginal conditions in both seasons. Multivariate analysis revealed that the dynamics of phytoplankton alpha-diversity and algal pollution indices was closely related to trophic states change and influenced by environmental conditions. The results indicated that pH, total dissolved solids, salinity, electrical conductivity, turbidity, nitrate, and phosphate were the main factors affecting algal assemblages in the mangrove forest. The indices were confirmed as a quicker, faster, and reliable approach to appropriately describe and measure the trophic state variations in the mangrove ecosystem, though an integrated approach may be required in the future.

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