Unit for Harmful Algal Bloom Studies, Borneo Marine Research Institute, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia.
Graduate School of Engineering, Soka University, 1-236 Tangi-machi, Hachioji-shi, Tokyo 192-8577, Japan.
Mar Pollut Bull. 2023 Aug;193:115182. doi: 10.1016/j.marpolbul.2023.115182. Epub 2023 Jun 21.
Plankton seasonality in tropical coastal waters is becoming more apparent as a result of monsoon-driven changes in environmental conditions, but research on the monsoonal variation of microplastics (MP) is still limited. We examined the monsoonal variation of MP in the water column and their ingestion by zooplankton in Sepanggar Bay, Sabah, Malaysia. MP concentrations were significantly higher during the Southwest monsoon whereas MP ingestions showed no monsoonal difference across major zooplankton taxa. Canonical Correspondence Analysis (CCA) and Generalized Additive Models (GAM) indicate that MP concentrations were driven by changes in rainfall and salinity while MP bioavailability to zooplankton was consistent regardless of monsoon. MP ingestion increased progressively up the planktonic food chain, and bioavailability of fibers and small-sized MP of high-density polymers to zooplankton was proportionately higher. Distinct changes in the MP concentration relative to the monsoons provide new insights into the seasonal variation of MP in tropical coastal ecosystems.
由于季风驱动的环境条件变化，热带沿海海域的浮游生物季节性变化变得更加明显，但有关微塑料（MP）季节性变化的研究仍然有限。我们研究了马来西亚沙巴州塞潘加湾水柱中 MP 的季节性变化及其被浮游动物摄入的情况。在西南季风期间，MP 浓度显著升高，而主要浮游动物类群的 MP 摄入量在季风期间没有差异。典范对应分析（CCA）和广义加性模型（GAM）表明，MP 浓度受降雨量和盐度变化的驱动，而 MP 对浮游动物的生物利用度则不受季风影响保持一致。MP 摄入沿浮游食物链逐渐增加，高密度聚合物的纤维和小尺寸 MP 的生物利用度相对较高。MP 浓度相对于季风的明显变化为热带沿海生态系统中 MP 的季节性变化提供了新的见解。
