海洋科学2025，Vol.49Issue(10)：39-51,13.DOI:10.11759/hykx20250403001
山东近海分粒级叶绿素a的时空格局及其成因分析
Spatiotemporal distribution patterns of size-fractionated chlorophyll a and its cause analysis in coastal waters of Shandong
摘要
Abstract
Phytoplankton are fundamental components of marine ecosystems,with variations in particle size influ-encing their photosynthetic efficiency and productivity,nutrient utilization strategies,biogeochemical cycles,and responses to climate change.Herein,we performed a systematic investigation of the spatiotemporal patterns of size-fractionated chlorophyll a and their underlying causes in the coastal waters of Shandong.The results provided critical insights into the structural and functional dynamics of this regional ecosystem.Based on three marine sur-veys conducted between 2022 and 2023,the spatiotemporal distribution and size composition of chlorophyll a in Shandong's coastal waters were delineated,and their relationships with physicochemical factors and shellfish-algae aquaculture were analyzed.Results indicated that chlorophyll a concentrations peaked during summer(average 2.94±3.23 μg/L),exhibiting a general nearshore-high and offshore-low distribution pattern.Furthermore,elevated levels were observed in Laizhou Bay,Rongcheng-Rushan,and Qingdao-Rizhao coastal areas,where abundant ni-trogen supported high phytoplankton biomass.Moreover,substantial seasonal variations in phytoplankton size composition were identified,where micro-and picophytoplankton dominated in spring;nano-and picophytoplank-ton prevailed in summer,and during winter,the largest proportion comprised microphytoplankton,followed by nanophytoplankton.Beyond the influence of temperature,turbidity,and nutrients on the phytoplankton size struc-ture and spatiotemporal patterns,selective feeding by filter-feeding bivalves and competition with kelp cultivation were identified as modifying factors of the phytoplankton size spectrum.These findings provide valuable data and scientific references for future ecosystem studies and better ecological conservation in Shandong's coastal waters.关键词
叶绿素a/粒级结构/时空格局/山东近海Key words
chlorophyll a/size structure/spatiotemporal distribution pattern/coastal waters of Shandong分类
农业科技引用本文复制引用
刘宪洁,王业迪,袁涌铨,李才文,宋书群..山东近海分粒级叶绿素a的时空格局及其成因分析[J].海洋科学,2025,49(10):39-51,13.基金项目
崂山实验室科技创新项目(2021QNLM040001-5) （2021QNLM040001-5）
国家重点研发计划(2023YFD2401102) the Science and Technology Innovation of Project of Laoshan Laboratory,No.2021QNLM040001-5 （2023YFD2401102）
the National Key Research and Development Program of China,No.2023YFD2401102 （）
