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引用本文:宋高,王海雷,郑绵平,李军.西藏地区现代沉积物中介形类环境指示意义初探.湖泊科学,2015,27(5):962-974. DOI:10.18307/2015.0524
SONG Gao,WANG Hailei,ZHENG Mianping,LI Jun.Preliminary study on environmental implications of ostracodes in modern deposits in Tibet. J. Lake Sci.2015,27(5):962-974. DOI:10.18307/2015.0524
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西藏地区现代沉积物中介形类环境指示意义初探
宋高1, 王海雷1, 郑绵平1, 李军2
1.中国地质科学院矿产资源研究所, 国土资源部盐湖资源与环境重点实验室, 北京 100037;2.四川大学建筑与环境学院, 成都 610065
摘要:
于2008和2012年先后2次从西藏阿里和那曲地区61个不同水体,包括不同盐度的湖泊、湿地、浅水坑和河流等,共采集了78个水体表层沉积物样品,用以研究该地区现生介形类的生态分布及其环境指示意义.经鉴定,阿里和那曲地区现生介形类共计11属38种.除Ilyocypris neoaspera等5个种外,本次调查的介形类各属种均在湖泊中出现,尤以Limnocythere dubiosa的总壳瓣数最为丰富.Ilyocypris属中除Ilyocypris subdunshanensisIlyocypris xizangensis外,其余各种均喜浅水坑的小型浅水环境.Leucocythere dilitataLimnocythere dubiosaLimnocytherellina kunlunensisEucypris rischtanica为该地区的广盐种.其中Limnocythere dubiosaLeucocythere dilitata适应盐度范围最广,在不同盐度的各类水体中均有出现.本次研究中的介形类均喜碱性水体,在pH值为8~9的水体中介形类各属种的丰度值达到最大.
关键词:  现代沉积物  现生介形类  生态分布  西藏地区  环境指示意义
DOI:10.18307/2015.0524
分类号:
基金项目:国家自然科学基金项目(41372179)、国土资源部公益性行业专项(201311140)和国家地质大调查项目(12120114048501)联合资助.
Preliminary study on environmental implications of ostracodes in modern deposits in Tibet
SONG Gao1, WANG Hailei1, ZHENG Mianping1, LI Jun2
1.MLR Key Laboratory of Saline Lake Resources and Environment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, P. R. China;2.School of Architecture and Environment, Sichuan University, Chengdu 610065, P. R. China
Abstract:
78 surface sediment samples in 61 different water bodies, such as lakes with different salinities, swamps, shallow puddles and rivers, in Ali and Naqu regions in Tibet, were collected to study the ecological distribution of extant ostracodes and their environmental implications. Total of 11 genus and 38 species living ostracodes are identified. All kinds of ostracodes in this research area are found in lakes except for the Ilyocypris neoaspera and other 4 species, and the number of Limnocythere dubiosa is the most abundant in the lakes. All Ilyocypris species prefers small and shallow water like shallow puddles except I. subdunshanensis and I. xizangensis. Leucocythere dilitata, Limnocythere dubiosa, Limnocytherellina kunlunensis and Eucypris rischtanica are euryhaline species in these regions, among which L. dubiosa and L. dilitata have the strongest tolerance for salinity and they have been found in a variety of water bodies with different salinities. Ostracodes prefer alkaline water and have the maximum abundance in water bodies with pH values of 8-9.
Key words:  Modern deposits  extant ostracodes  ecological distribution  Tibet  environmental implications
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