Comparative studies of the population genetic structure of the Brachionus calyciflorus species complex from four inland lakes in Wuhu,China |
| |
Affiliation: | 1. Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea;2. National Instrumentation Center for Environmental Management, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, South Korea;3. Department of Marine Resource Development, College of Life Sciences, Gangneung-Wonju National University, Gangneung 210-702, South Korea;4. Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon 406-772, South Korea |
| |
Abstract: | To study how the population genetic structure in zooplankton respond to environmental conditions, using comparative limnology, the genetic diversity and genetic differentiation of the B. calyciflorus complex collected from four inland lakes in Wuhu City, China were investigated based on the 16S rRNA gene and nuDNA ITS sequences. The results displayed a high genetic diversity, and the nucleotide diversity of the 16S rRNA gene was higher than that of the ITS sequence. The phylogenetic analyses grouped the four populations into two cryptic species (Bc-JT and Bc-FL) with strong support. The two cryptic species were found in lakes with different trophic levels, demonstrating significant ecological specialization. The origins of clone TW12 were not consistent in the phylogenetic trees between two genetic markers, which might be attributed to the effects of male-mediated gene flow on the phylogenetic relationships of rotifers. The nucleotide diversity of the cryptic species Bc-JT was higher than that of Bc-FL, indicating that eutrophication might decrease the genetic diversity of cryptic species. The total phosphorus concentration in water bodies might be the most important factor affecting the genetic diversity of species. |
| |
Keywords: | Rotifer Cryptic species Genetic structure Inland lakes |
本文献已被 ScienceDirect 等数据库收录! |
|