Patterns in benthic biodiversity link lake trophic status to structure and potential function of three large, deep lakes.
Patterns in benthic biodiversity link lake trophic status to structure and potential function of three large, deep lakes.
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DOI：
10.1371/journal.pone.0117024
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Girdner SF
中科院分区：
文献类型：
--
作者：
Hayford BL;Caires AM;Chandra S;Girdner SF
相对于它们的稀缺性，大而深的湖泊养活了世界上很大一部分淡水物种。这种生物多样性受到人类发展的威胁，需要保护。生物多样性的直接比较是生物保护监测的基础，但很难在大型岛屿生态系统之间进行。我们研究的目的是对世界上三个最大的湖泊：美国的太浩湖、蒙古的赫夫斯戈·L湖和美国的火山口湖的底栖生物多样性进行这样的比较。我们研究了常见底栖生物非叮咬类(摇蚊科)的生物多样性，并利用基于摇蚊的湖泊类型学确定了湖泊的营养状况，测试了三个湖泊之间的群落结构是否相似，以及摇蚊多样性是否会在湖泊内部和湖泊之间表现出显著的差异。类型学分析表明，HövsgöL湖为超贫营养，火山口湖为寡营养，太浩湖为交界性贫营养/中营养。这些结果与HövsgöL湖和火山口湖湖泊营养状况的传统远洋测量方法相似，但对太浩湖不同，文献中发现的透明度等传统远洋测量方法已将太浩湖指定为超寡营养。相似性分析表明，太浩湖和HövsgöL摇蚊群落之间的相似性大于两者与火山口湖群落的相似性。多样性在三个湖之间和每个湖内的空间上都不同。研究表明，这些大型湖泊的摇蚊群落对营养条件非常敏感。在HövsgöL湖和太浩湖的深层环境中，摇蚊群落相似，表明这两个湖泊的摇蚊群落在比较大型湖泊的营养状态变化时可能是有用的。太浩湖多样性的空间变化表明摇蚊群落对营养丰富的反应不同，这可能表明生境内和生境之间营养状态的变化。
Relative to their scarcity, large, deep lakes support a large proportion of the world’s freshwater species. This biodiversity is threatened by human development and is in need of conservation. Direct comparison of biodiversity is the basis of biological monitoring for conservation but is difficult to conduct between large, insular ecosystems. The objective of our study was to conduct such a comparison of benthic biodiversity between three of the world’s largest lakes: Lake Tahoe, USA; Lake Hövsgöl, Mongolia; and Crater Lake, USA. We examined biodiversity of common benthic organism, the non-biting midges (Chironomidae) and determined lake trophic status using chironomid-based lake typology, tested whether community structure was similar between the three lakes despite geographic distance; and tested whether chironomid diversity would show significant variation within and between lakes. Typology analysis indicated that Lake Hövsgöl was ultra-oligotrophic, Crater Lake was oligotrophic, and Lake Tahoe was borderline oligotrophic/mesotrophic. These results were similar to traditional pelagic measures of lake trophic status for Lake Hövsgöl and Crater Lake but differed for Lake Tahoe, which has been designated as ultra-oligotrophic by traditional pelagic measures such as transparency found in the literature. Analysis of similarity showed that Lake Tahoe and Lake Hövsgöl chironomid communities were more similar to each other than either was to Crater Lake communities. Diversity varied between the three lakes and spatially within each lake. This research shows that chironomid communities from these large lakes were sensitive to trophic conditions. Chironomid communities were similar between the deep environments of Lake Hövsgöl and Lake Tahoe, indicating that chironomid communities from these lakes may be useful in comparing trophic state changes in large lakes. Spatial variation in Lake Tahoe’s diversity is indicative of differential response of chironomid communities to nutrient enrichment which may be an indication of changes in trophic state within and across habitats.
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DOI：
10.1899/0887-3593(2007)26
发表时间：
2007-06-01
影响因子：
--
作者：
Anderson, Caroline;Cabana, Gilbert
通讯作者：
Cabana, Gilbert
影响因子：
2.6
作者：
Larson, Gary L.;Collier, Robert;Buktenica, Mark W.
通讯作者：
Buktenica, Mark W.
影响因子：
4.5
作者：
Downing, J. A.;Prairie, Y. T.;Middelburg, J. J.
通讯作者：
Middelburg, J. J.
影响因子：
2.6
作者：
Ferrington, Leonard C., Jr.
通讯作者：
Ferrington, Leonard C., Jr.
影响因子：
--
作者：
Blumenshine, SC;Vadeboncoeur, Y;Knight, SE
通讯作者：
Knight, SE