Contribution of phytoliths to total biogenic silica volumes in the tropical rivers of Malaysia and associated implications for the marine biogeochemical cycle

作     者：臧家业 刘森 刘焱光 马永星 冉祥滨 

作者机构：Marine Ecology Research Center First Institute of OceanographyState Oceanic Administration Tianjin Marine Environmental Monitoring Central StationState Oceanic Administration Key Laboratory of Marine Sedimentology and Environmental GeologyFirst Institute of OceanographyState Oceanic Administration College of Chemistry and EngineeringQingdao University 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2016年第34卷第5期

页      面：1076-1084页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.41106072,41376093) the International Collaboration Science Plan(No.GASI-01-02-01-04) 

主　　题：biogenic silica phytolith diatom Malaysia biogeochemical cycle 

摘      要：The contribution of phytoliths to total biogenic silica(BSi) volumes in rivers worldwide,and the associated implications for the biogeochemical cycle,require in-depth *** on samples from rivers in Peninsular Malaysia,this project investigated the source and characteristics of B Si found in Asian tropical rivers,as well as the process of reverse weathering taking place in these fluvial *** indicated that BSi samples collected in sediments consisted of phytolith,diatom and sponge ***,predominantly of the elongate form,comprised 92.8%-98.3% of BSi in the Pahang *** BSi in this river consisted mainly of pennatae diatoms,but represented a relatively small proportion of the total BSi ***,diatom BSi(predominantly of the Centricae form) was more prevalent in the Pontian and Endau Rivers with shares of 68.8% and 79.3% of the total BSi volumes,respectively,than Pahang *** contents of the BSi particulates ranged from 1.85% to 10.8% with an average of 4.79%.These values are higher than those recorded in other studies to date,and indicate that BSi plays a major role in controlling permanent carbon *** study suggests that phytoliths from terrestrial plants are the primary constituents of BSi in the rivers of Peninsular Malaysia,and therefore represent a significant proportion of the coastal silica budget.