Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, No. 8 Jiang Wang Miao Street, Nanjing 210042, China.
Sino-Japan friendship Center for Environmental Protection, Beijing 100029, China.
Int J Environ Res Public Health. 2019 Jun 18;16(12):2155. doi: 10.3390/ijerph16122155.
To illustrate the contribution of phytoplankton-derived particulate organic matter (PPOM) to endogenous phosphorus (P) cycling and its effects on cyanobacteria blooms, PPOM characteristics, the degradation mechanism, and the growth of P-deficient were studied in Lake Taihu. Results showed that PPOM is the most important P pool in the water column during cyanobacteria bloom, accounting for more than 80% of the total P (TP) in the water. During PPOM degradation, the particulate orthophosphate (Ortho-P) is the main species of P release from PPOM in the early degradation stage. The variations of polyphosphate (Poly-P) and phosphodiesters (Diester-P) contents were most significant, which were degraded completely within four days and eight days. Cell density and growth rate of using PPOM as P source were similar to those growing on NaHPO. The above results show that P in PPOM can be converted into available P by degradation, thus promoting the growth of . Therefore, the contribution of P release from PPOM degradation needs to be paid attention to in lake eutrophication control in the future.
为了阐明浮游植物衍生的颗粒有机物质（PPOM）对内源性磷（P）循环的贡献及其对蓝藻水华的影响，本研究以太湖为例，对 PPOM 特征、降解机制以及缺磷条件下的生长进行了研究。结果表明，在蓝藻水华期间，PPOM 是水柱中最重要的 P 库，占水体总磷（TP）的 80%以上。在 PPOM 降解过程中，颗粒正磷酸盐（Ortho-P）是 PPOM 早期降解阶段 P 释放的主要物质。多聚磷酸盐（Poly-P）和磷酸二酯（Diester-P）含量的变化最为显著，它们在四天和八天内完全降解。以 PPOM 为 P 源的生长速度和细胞密度与在 NaHPO 上生长的相似。上述结果表明，PPOM 中的 P 可以通过降解转化为有效 P，从而促进的生长。因此，在未来的湖泊富营养化控制中，需要注意 PPOM 降解释放的 P 的贡献。
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