Macrofauna Communities in the Mountain Streams of Sri Lanka (Ceylon)
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The rheophilic macrobenthic communities of the mountainous part of the island of Sri Lanka have been studied based on the material of 170 quantitative stations of small rivers and streams. Thirteen types of communities are described by taxonomic structure (mainly at the genus level) and habitats; similarities with other regions are also shown. A difference between the communities in the lowland (tropical) and highland (subtropical) zones is observed. This paper provides a taxonomic review of the macrofauna sampled and a description of the regional features of its ecology and diversity. Characteristics of the oriental tropical rheophilic communities in comparison with subtropical and boreal Palearctic communities, the influence of altitudinal zonation, the effect of the island on the community structure, and the biogeographic position of Sri Lanka are discussed.
Keywords:macrozoobenthos communities tropics streams islands Oriental region Sri Lanka
Author is grateful to A.A. Ganicheva, A.N. Zakirov, A.V. Limanskaya, S.V. Lopatin, and M.L. Sindalovskaya—who participated in the sampling on Sri Lanka in 2017—and D.M. Palatov for helping identify a number of taxa and making valuable comments on the text of the article.
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Conflict of interests. The authors declare that they have no conflict of interest.
Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.
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