海洋科学2023，Vol.47Issue(10)：10-24,15.DOI:10.11759/hykx20221114002
山东半岛近岸海带养殖活动对水体光学吸收特性的影响
Effects of coastal kelp farming on the absorption characteris-tics of water in the Shandong Peninsula
摘要
Abstract
To study how nearshore kelp aquaculture affects the optical characteristics of water bodies,the Heini Bay of the Shandong Peninsula was selected as a research area.Using synchronous observation data from nine stations from April to August 2021,the absorption characteristics of the total suspended,algal,and nonalgal particulate matter,as well as colored dissolved organic matter(CDOM),were analyzed,and the contribution of each compo-nent to the total absorption coefficient was calculated.In addition,a quasi-analytical algorithm was used to invert the total absorption coefficient of water using MODIS images,and the seasonal variation in the absorption charac-teristics of water in Heini Bay was obtained based on the measured data.The results show that the absorption coef-ficients of algal,nonalgal,and total suspended particulate matter,as well as that of CDOM in the surface water,are considerably higher during the kelp aquaculture season than during the no-kelp aquaculture season,and the total absorption coefficient of water is greater in kelp aquaculture areas than in no-kelp aquaculture areas during spring.The resuspension of surface sediment on the seabed results in a higher absorption coefficient of the bottom layer during the ripening period(spring),and kelp accumulates a large amount of organic matter,resulting in a higher absorption coefficient of algae particles in the middle depth water body.The shift in the reference wavelength to-ward the red light better estimates the absorption coefficient of the surface water in the study area based on the QAA_v5 algorithm.In addition,the water components were observed to affect the longer band characteristics dur-ing the kelp farming season.This study can provide a reference for an in-depth understanding of the effects of kelp aquaculture on the concentration and distribution of water components,carbon cycling,and the structure and func-tion of aquatic ecosystems.Moreover,the findings of this study could help improve the remote-sensing inversion accuracy of nearshore water components.关键词
黑泥湾/海带养殖/吸收特性/Quasi-analytical algorithm/季节变化Key words
Heini Bay/kelp aquaculture/absorption properties/quasi-analytical algorithm/seasonal variation分类
海洋科学引用本文复制引用
姜珊珊,黄海军,董玉国,刘艳霞,严立文,王启飞,李冰..山东半岛近岸海带养殖活动对水体光学吸收特性的影响[J].海洋科学,2023,47(10):10-24,15.基金项目
国家自然科学基金项目(41976166) （41976166）
华能石岛湾核电厂址水文观测专题(FWQT00029)The National Natural Science Foundation of China,No.41976166 （FWQT00029）
Huaneng Shidao Bay Nuclear Power Plant Site Hydrological Observation Topics,No.FWQT00029 （）
