Cosmopolitism and endemism in free-living nematodes

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" Cosmopolitism and endemism in free-living nematodes "
Zullini, Aldo

Document Type	:	AL
Record Number	:	935202
Doc. No	:	LA1dt9c15r
Language of Document	:	English
Main Entry	:	Zullini, Aldo
Title & Author	:	Cosmopolitism and endemism in free-living nematodes [Article]\ Zullini, Aldo
Title of Periodical	:	Biogeographia – The Journal of Integrative Biogeography
Volume/ Issue Number	:	33
Date	:	2018
Abstract	:	Most free-living nematodes should have a global distribution if they would follow general tendencies of microbial organisms. Information on free-living nematodes presented in this review demonstrates that this cosmopolitanism is less common than assumed by theory. While very large distribution ranges are observed in a number of nematode species, various examples of endemism are described for isolated units like islands, extreme environments and ancient pre-Quaternary lakes. Endemism is generally rare among microorganisms, but a typical observation for larger organisms. The biogeography of nematodes thus reflects their intermediate position between macro- and microorganisms and future studies on this interesting group may help identifying why the positive relationship between body size and range size observed in large animals shifts to a negative relationship in microbial organisms.