CLAPPP - New Caledonian lagoons: Physics and Phytoplankton processes

The New Caledonia lagoons show high seasonal and interannual variability (related to El Niño – Southern oscillation – ENSO - variability). They present a great diversity of local situations linked to differences in their geomorphology, to the nature of terrigenous inputs and to varied anthropogenic pressure. This variability impacts the structure of planktonic communities and their biodiversity. The scientific objectives of the CLAPPP project developed on 6 New Caledonia lagoons are : - 1) to describe the local environmental conditions and their seasonality, - 2) to understand the heterogeneity of phytoplankton communities at the biological, spatial and/or temporal levels, - 3) to study the role of this diversity in the functioning of coral ecosystems and the regulation of biogeochemical cycles, and - 4) to assess the importance of phytoplankton as an index of productivity and health of the lagoons in relation with local stress conditions and the risk of HABs.

新喀里多尼亚潟湖存在显著的季节与年际变率，该变率与厄尔尼诺-南方涛动（El Niño – Southern Oscillation, ENSO）变率相关。其局部环境具有高度多样性，这种多样性与潟湖的地貌差异、陆源输入特征以及多样的人为胁迫压力密切相关。此类变率会对浮游生物群落结构及其生物多样性产生影响。针对6个新喀里多尼亚潟湖开展的CLAPPP项目，其科学目标如下：1）阐明当地环境状况及其季节变化规律；2）解析浮游植物群落在生物学、空间及/或时间尺度上的异质性；3）研究该多样性在珊瑚生态系统功能运转与生物地球化学循环调控中的作用；4）评估浮游植物作为潟湖生产力与健康状况指标的重要性，并结合当地胁迫条件与有害藻华（Harmful Algal Blooms, HABs）发生风险展开分析。