| 南极菲尔德斯半岛两侧南极帽贝种群结构比较分析 |
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| 引用本文： | 唐森铭.南极菲尔德斯半岛两侧南极帽贝种群结构比较分析[J].极地研究,2006,18(3):197-205. |
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| 作者姓名： | 唐森铭 |
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| 作者单位： | 国家海洋局第三海洋研究所,厦门,361005 |
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| 基金项目： | 南极地区地球环境监测与关键过程研究专题，国家908-02-03-09专项资助 |
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| 摘 要： | 本文对南极乔治王岛菲尔德斯半岛东、西海岸的帽贝种群的个体分布特征进行了研究,样品于2003年2月南半球夏季在菲尔德斯半岛东面的长城湾长城站一侧和企鹅岛西侧潮间带以及半岛西岸地理湾潮间带采集。在上述三个站点作断面随机取样,分别统计了南极帽贝(Na-cella concinna Strebel,1908)密度和个体大小。结果表明,除了半岛两侧帽贝种群密度不同外,半岛东、西两侧帽贝个体大小也存在较大的差异,西海岸地理湾帽贝壳长明显较大,大于企鹅岛帽贝平均壳长1cm以上,其他生长指标也大于东海岸的帽贝。西海岸帽贝个体的腹足面积和壳高的回归直线的斜率均大于东海岸帽贝的对应值。东、西海岸帽贝的腹足与帽贝的壳高存在异速生长状况(allometry),西海岸帽贝异速生长差异高于东海岸的帽贝。分析结果进一步证明,当地低密度帽贝种群与西海岸比较恶劣的自然环境有关,环境差异导致西岸产生大个体帽贝。菲尔德斯东、西海岸环境因子,如风浪、冰块冲击作用以至生物捕食产生的环境压力,不仅作用于种群个体的生长状态,而且也作用于种群结构。
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| 关 键 词： | 菲尔德斯半岛 南极帽贝(Nacella concinna) 种群 异速生长 密度 |
| 收稿时间： | 2006-04 |
| 修稿时间： | 2006-06 |
COMPARISONS OF POPULATION STRUCTURE OF ANTARCTIC LIMPET(NACELLA CONCINNA)ON THE EAST AND WEST COASTS OF SOUTHERN FILDES PENINSULA |
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| Tang Senming.COMPARISONS OF POPULATION STRUCTURE OF ANTARCTIC LIMPET(NACELLA CONCINNA)ON THE EAST AND WEST COASTS OF SOUTHERN FILDES PENINSULA[J].Chinese Journal of Polar Research,2006,18(3):197-205. |
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| Authors: | Tang Senming |
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| Institution: | The Third Institute of Oceanography, SOA, Xiamen 361005, China |
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| Abstract: | During the 19th Chinese Antarctic expedition in February of 2003,the Antarctic limpet population were investigated on the east and west coasts of Fildes Peninsula.The samples were randomly collected at three sites,the eastside of Ardley Island,the beach near the Great Wall Station and the rocky shore of Geography Bay on the west side of Fildes Peninsula,where limpet densities were counted in situ and samples were taken back for their shell length,width,height and weight.It shows that limpet sizes are obviously different between the populations at both sides of the peninsula.The shell length of limpet at Geography Bay is 1cm longer by average than the east coast.It shows a stronger allometry in the population at the west coast of peninsula.The evidence further postulates that harsher environmental conditions in the west coast are factors resulting in low density and larger shells.Factors,such as wave action,ice scouring and even the bio-harvest,may have modified population structure as well as shell morphology. |
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| Keywords: | Fildes Peninsula Antarctic limpet(Nacella concinna) population allometry |
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