云南高原10个湖泊沉水植物的碳、氮、磷化学计量学特征  

Stoichiometric characteristics of submerged macrophytes in ten lakes of Yunnan plateau

作　　者：郝贝贝[1,2] 吴昊平[1,2] 史俏[1,2] 刘贵华[1] 邢伟[1] 

机构地区：[1]中国科学院武汉植物园水生植物与流域生态重点实验室,武汉430074 [2]中国科学院大学,北京100049

出　　处：《湖泊科学》2013年第4期539-544,共6页Journal of Lake Sciences

基　　金：国家自然科学基金项目(31000163);中国科学院青年创新促进会项目联合资助

摘　　要：于2010年8月以云南高原10个湖泊进行沉水植物的化学计量学特征研究,以期为高原湖泊沉水植物的元素化学计量以及富营养化湖泊中沉水植物的恢复提供基础数据.研究表明,10个湖泊沉水植物的种类随营养水平的增加而减少,基本都是眼子菜科眼子菜属和小二仙草科狐尾藻属植物.10个湖泊沉水植物的总碳、总氮和总磷含量范围分别为170.22～373.14、0.90～9.70和0.36～4.30 mg/g;碳氮比、碳磷比和氮磷比范围分别为37.21～188.47、83.18～468.02和1.57～4.90.Spearman秩相关分析表明,10个湖泊的沉水植物氮磷比与湖泊特征和理化参数没有显著相关性,而碳氮比和碳磷比分别与水体总磷和总氮显著负相关.从单一物种来看,总碳、总氮、总磷、碳氮比、碳磷比和氮磷比的最高平均值分别出现在马来眼子菜(368.41 mg/g)、光叶眼子菜(7.60 mg/g)、蓖齿眼子菜(3.26 mg/g)、微齿眼子菜(68.93)、光叶眼子菜(224.57)和光叶眼子菜(4.82)上.综上所述,调查的云南10个高原湖泊普遍磷过剩而氮相对不足,物种多样性下降,蓖齿眼子菜、微齿眼子菜和光叶眼子菜可能更适合作为云南高原富营养化湖泊沉水植物恢复的物种.To broaden the stoichiometric characteristics of submerged macrophytes in plateau lakes and to restore them in eutrophic plateau lakes, 10 lakes of Yunnan plateau were investigated in August 2010. Results showed that the number of species declined with the increase of eutrophic level and most of them belonged to Potamogeton and Myriophyllum. The tissue contents of total car- bon（ C）, total nitrogen（N） and total phosphorous（P） in these 10 lakes ranged from 170.22 -373.14 mg/g, O. 90- 9.70 mg/g and 0.36 - 4.30 mg/g, respectively. The ratios of C： N, C： P and N： P in 10 lakes ranged from 37.21 - 188.47,83.18 -468.02, I. 57 - 4.90, respectively. Results of Spearman rank correlation analysis indicated that no significant correlations were found be- tween N： P and environmental factor, such as limnological and physicochemical parameters. As for individual species, the highest mean values of C, N, P, C： N, C： P and N： P were 368.41 rag/g（ Potamogeton malaianus ）, 7.60 rag/g（ Potamogeton lucens ）, 3.26 mg/g （ Potamogeton pectinatus ）, 68.93 （ Potarnogeton maackianu~ ） , 224.57 （ Po luce~ ）, 4.82 （ P. lucens ） , respectively. We concluded that P is excess and N is relatively limited in these 10 selected lakes, and P, pectinatus, P. maackianus and P. lu- cer~ may be the more suitable species for the restoration of eutrophic plateau lakes.

关 键 词：云南高原湖泊 沉水植物 化学计量学特征 富营养化 恢复 

分 类 号：X524[环境科学与工程—环境工程]