Long-distance passive dispersal in microscopic aquatic animals

Area of Science:

• Ecology
• Evolutionary Biology
• Zoology

Background:

• Microscopic aquatic animals possess dormancy and reproductive capabilities, suggesting potential for cosmopolitan distribution.
• Long-distance dispersal via mobile elements may prevent the formation of distinct biogeographical patterns for these organisms.

Purpose of the Study:

• To review evidence for long-distance dispersal assumptions in nematodes, rotifers, and tardigrades.
• To examine evidence for transportation mechanisms and biogeographical outcomes in microscopic aquatic animals.

Main Methods:

• Review of existing literature on dormancy, viability, and reproduction in microscopic aquatic animals.
• Analysis of surveys on dispersing stages and biogeographical/phylogeographical studies.

Main Results:

• Evidence supports long-distance dispersal potential for some microscopic aquatic taxa.
• Biogeographical patterns are evident for microscopic organisms, contrary to purely cosmopolitan distribution.
• Species-specific ecological features influence dispersal capabilities and geographic distribution.

Conclusions:

• Not all microscopic aquatic animals are cosmopolitan; some exhibit restricted distributions.
• Biogeographical patterns exist for microscopic aquatic animals, influenced by their ecological traits.
• Dormancy and dispersal capabilities vary, leading to diverse distribution patterns.