摘要
为揭示我国西藏高原湖泊原生动物群落结构特征及垂直分布格局,于2017年11月及2018年5月和9月,在巴松措中心分7层设置采样点,利用25号浮游生物网采集原生动物。采用活体观察和固定染色相结合的方法,共鉴定到原生动物195种(其中春季86种,夏季93种,秋季80种),隶属于2门11纲24目43科59属。其中以肉鞭门种类较丰富,砂壳类纤毛虫占优势。垂直分布的物种组成和群落结构复杂表现为:表层>中层>底层,物种多样性、丰富度和优势度指数表现为:表层>中层>底层,均匀度指数大多数为1;季节分布的物种组成和群落结构群复杂程度表现为:夏季>春季>秋季,物种多样性、丰富度指数表现为:夏季>秋季>春季,优势度指数表现为:夏季>秋季>春季,均匀度指数表现为:秋季>春季>夏季;优势物种和群落结构都会随水深的增加而减少。总体呈现出物种多样性较低、均匀度较高,具有明显的时空异质性。
In order to reveal the structural characteristics and vertical distribution patterns of the protozoan community in lakes on the Tibet Plateau in China, a survey was conducted in the center of Basom-tso lake in November 2017, May and September 2018. Sample sites were collected at 7 different dephths of water using the 25# plankton net by a combination of in vivo observation and fixed staining, 195 species(86 species in spring, 93 species in summer and 80 species in autumn)were identified, which belongs to 2 phyla, 11 classes, 24 orders, 43 families, 59 genera. The dominant species were found to be the phylum sarcophagus and the sand shell ciliates. The composition of vertical distribution species and the structure of complex community were shown as: surface layer>middle layer>bottom layer. The species diversity, richness and dominance index were shown as: surface layer>middle layer>bottom layer and the uniformity index was mostly 1. The composition of seasonal distribution species and the structure of complex community were shown as: summer>spring>autumn.The species diversity and richness index were shown as: summer>autumn>spring, the dominance index was shown as: summer>autumn>spring, and the evenness index was shown as: autumn>spring>summer. The dominant species and community structure will decrease with the increase of water depth. The servey had revealed an obvious temporal and spatial heterogeneity with low species diversity and high uniformity.
作者
杨欣兰
潘瑛子
巴桑
YANG Xinlan;PAN Yingzi;BA Sang(Institute of Fisheries Science,Tibet Academy of Agricultural and Animal Husbandry Sciences,Lhasa 850000,China;Laboratory of Wetland and Catchments Ecology in Tibetan Plateau,Faculty of Natural Sciences,Tibet University,Lhasa 850000,China)
出处
《生态学报》
CAS
CSCD
北大核心
2022年第8期3216-3227,共12页
Acta Ecologica Sinica
基金
国家自然科学基金项目(31660620,31960738)。
关键词
原生动物
群落结构
垂直分布
巴松措
西藏
protozoa
community structure
vertical distribution
Basom-tso lake
Tibet
