Population structure of an endemic gastropod in Chinese plateau lakes: evidence for population decline
文献类型：期刊论文
| 作者 | Song, Zhuoyan1,2; Zhang, Junqian1; Jiang, Xiaoming1,2; Wang, Chouming1; Xie, Zhicai1 |
| 刊名 | FRESHWATER SCIENCE
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 32期号:2页码:450-461 |
| 关键词 | endangered gastropods Margarya melanioides population size range contraction human-induced degradation demographic drift dispersal ability Lake Dianchi |
| ISSN号 | 2161-9565 |
| 通讯作者 | Song, ZY (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China. |
| 中文摘要 | The highly endemic diversity of the Yun-Gui plateau lakes has decreased severely in recent decades. Protecting these native species is a challenge, in part because their biology and population ecology remain unexplored. We investigated 1 focal endangered gastropod species (Margarya melanioides) in 1 plateau lake: 1) to quantify spatiotemporal variation in population abundance and size structure, and 2) to identify the key variables influencing these variations. Density was 0.068 individuals/m(2) with an estimated total population size of 2.1 x 10(7) individuals. The size-frequency distribution was skewed toward larger, mature individuals (40.0-60.0 mm), a result indicating that the population is aging. Population size structure showed high spatial heterogeneity, and density was highest in the north-central region of the lake. Redundancy analysis indicated that human-induced environmental degradation strongly controlled the spatial patterns in size-structure. This species has experienced a remarkable decrease in range and population size over the past 50 y, and the population probably will collapse by 2015. The decline could be attributed to demographic drift, environmental filtering, human harvesting, and its limited dispersal ability. Our studies should give useful information for building efficient conservation strategies for M. melanioides and other threatened plateau gastropods. Further studies are needed on the population ecology and reproductive biology of M. melanioides, particularly on its reproductive behavior and size-specific survivorship. |
| 英文摘要 | The highly endemic diversity of the Yun-Gui plateau lakes has decreased severely in recent decades. Protecting these native species is a challenge, in part because their biology and population ecology remain unexplored. We investigated 1 focal endangered gastropod species (Margarya melanioides) in 1 plateau lake: 1) to quantify spatiotemporal variation in population abundance and size structure, and 2) to identify the key variables influencing these variations. Density was 0.068 individuals/m(2) with an estimated total population size of 2.1 x 10(7) individuals. The size-frequency distribution was skewed toward larger, mature individuals (40.0-60.0 mm), a result indicating that the population is aging. Population size structure showed high spatial heterogeneity, and density was highest in the north-central region of the lake. Redundancy analysis indicated that human-induced environmental degradation strongly controlled the spatial patterns in size-structure. This species has experienced a remarkable decrease in range and population size over the past 50 y, and the population probably will collapse by 2015. The decline could be attributed to demographic drift, environmental filtering, human harvesting, and its limited dispersal ability. Our studies should give useful information for building efficient conservation strategies for M. melanioides and other threatened plateau gastropods. Further studies are needed on the population ecology and reproductive biology of M. melanioides, particularly on its reproductive behavior and size-specific survivorship. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Ecology ; Marine & Freshwater Biology |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| 关键词[WOS] | FRESH-WATER BIODIVERSITY ; DIANCHI LAKE ; INVERTEBRATE CONSERVATION ; ISLAND BIOGEOGRAPHY ; EQUILIBRIUM-THEORY ; NORTH-AMERICA ; COMMUNITY ; CHALLENGES ; EUTROPHICATION ; CYANOBACTERIA |
| 收录类别 | SCI |
| 资助信息 | Special S&T Project on Treatment and Control of Water Pollution [2013ZX07102-005]; National Natural Science Foundation of China [31272270] |
| 语种 | 英语 |
| WOS记录号 | WOS:000318774500007 |
| 公开日期 | 2013-10-31 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/19255]  |
| 专题 | 水生生物研究所_水生生物多样性与资源保护研究中心_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Zhuoyan,Zhang, Junqian,Jiang, Xiaoming,et al. Population structure of an endemic gastropod in Chinese plateau lakes: evidence for population decline[J]. FRESHWATER SCIENCE,2013,32(2):450-461. |
| APA | Song, Zhuoyan,Zhang, Junqian,Jiang, Xiaoming,Wang, Chouming,&Xie, Zhicai.(2013).Population structure of an endemic gastropod in Chinese plateau lakes: evidence for population decline.FRESHWATER SCIENCE,32(2),450-461. |
| MLA | Song, Zhuoyan,et al."Population structure of an endemic gastropod in Chinese plateau lakes: evidence for population decline".FRESHWATER SCIENCE 32.2(2013):450-461. |
入库方式： OAI收割
来源：水生生物研究所
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