巢湖富磷地质区沉积物磷的生物可利用性  

Phosphorus Bioavailability in Surface Sediments from Phosphorus-rich Geological Region of Lake Chaohu

作　　者：孙爱华[1,2] 陈玺[1,2] 曹秀云[1] 宋春雷[1] 周易勇[1] 

机构地区：[1]中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,湖北武汉430072 [2]中国科学院研究生院,北京100049

出　　处：《水生态学杂志》2012年第4期26-32,共7页Journal of Hydroecology

基　　金：国家自然科学基金面上项目(40903030;41073066;41173081);淡水生态与生物技术国家重点实验室项目(2011FBZ15)

摘　　要：2010年4-9月,以巢湖富磷地质区池塘为试验对象,测定了叶绿素a与不同形态磷的浓度以及藻类的数量和组成,分析了沉积物藻类可利用性磷(AAP)含量与磷平衡浓度,提取并用分子生物学方法鉴定了沉积物无机磷细菌的主要种类。结果表明,沉积物溶解总磷与AAP含量显著正相关(P<0.05),与叶绿素a浓度极显著正相关(P<0.01)。沉积物磷在吸附和释放趋势上基本对应于藻类随季节消长的模式。藻的种类较丰富,沉积物无机磷细菌的主要种类包括微单胞菌(Micromonospora sp.,Micromonospora chokoriensis)和链霉菌(Streptomyces neya-gawaensis,Streptomyces torulosus)。微生物驱动的富磷地质区沉积物磷的溶解可为藻类生长提供生物可利用的磷营养。Chlorophyll-a and various phosphorus forms concentration,the abundance and composition of Algal,Algae Available Phosphorus（AAP） and equilibrium phosphorus concentration（EPC0） were studied systematically from April to September in 2010,targeting phosphate main region of Lake Chaohu.The main types of sediment inorganic phosphate-solubilizing bacteria were extracted and identified using molecular methods.The results indicated that Chlorophyll-a and Dissolved Total Phosphorus（DTP） had significant positive correlation with AAP.The tendency of sediment phosphorus adsorption and release basically was corresponded to the pattern of seasonal fluctuation of the algae.This region was abundant in types of algae.The main types of sediment inorganic phosphate-solubilizing bacteria including Micromonospora sp.,Micromonospora chokoriensis,Streptomyces neyagawaensis,Streptomyces torulosus.The microbial-driven phosphorus releasing in phosphorus-rich geological region can supply bioavailable phosphorus for the growth of algae.

关 键 词：巢湖 生物可利用性磷 无机磷细菌 

分 类 号：Q178.1[生物学—水生生物学]