模糊秀体溞(Diaphanosoma dubium)和奥氏秀体溞(D.orghidani)在广东水库中的分布特征

模糊秀体溞(Diaphanosoma dubium)和奥氏秀体溞(D.orghidani)在广东水库中的分布特征
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DOI:
10.18307/2011.0520
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发表时间:
2011
期刊:
湖泊科学
影响因子:
--
通讯作者:
韩博平
韩博平
中科院分区:
其他
文献类型:
--
作者:
陈花;程丹;徐磊;林秋奇;韩博平

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为了解其区域种群分布情况,2001年至2006年,在飞来峡、新丰江、大镜山3个处于不同营养状态的水库,每月或按季节对广东省19个水库枯水期和汛期进行了取样,各水库均发现了成虫,其中5个水库仅有D.dubium,8个水库仅有D.orghidani,6个水库两种都有。两种物种的生态位差异明显。D.dubium主要在富营养水库中占优势,而D.orghidani在贫营养水库中占优势。D.dubium和D.orghidani在水库中的分布可以通过它们在形态、食物选择和躲避捕食能力方面的差异得到很好的解释。
Diaphanosoma is a dominant genus of cladocera in South China,and widely distributes in lakes and reservoirs.To understand its regional population distribution,the animals were sampled in dry and flood seasons in 19 reservoirs of Guangdong Province during 2001 and 2006monthly or seasonally in three reservoirs of Feilaixia,Xinfengjiang and Dajingshan,which have been under different trophic states.Adult Diaphanosoma was found in all reservoirs,where 5 reservoirs had only D.dubium,8 reservoirs had only D.orghidani,and 6 reservoirs had the two species.The two species showed an apparent difference in niches.D.dubium mainly dominated in eutrophic reservoirs,while D.orghidani did in oligotrophic reservoirs.Distributions of D.dubium and D.orghidani in the reservoirs can be well explained by their differences in morphology,food selection and ability of avoiding predators.
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