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Updated: May 18, 2026

Microbiota of Attine Ants' Gardens: Visualizing a Microbial Landscape by Scanning Electron Microscopy
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Nematode spatial and ecological patterns from tropical and temperate rainforests.

Dorota L Porazinska1, Robin M Giblin-Davis, Thomas O Powers

  • 1Fort Lauderdale Research and Education Center, University of Florida-Institute of Food and Agricultural Sciences, Fort Lauderdale, Florida, United States of America. dorotalp@ufl.edu

Plos One
|September 18, 2012
PubMed
Summary

Microscopic nematodes exhibit unique biodiversity patterns, challenging the assumption of cosmopolitan distribution. This study reveals distinct nematode communities in temperate and tropical rainforests, indicating complex biogeographical patterns for soil microbiota.

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Area of Science:

  • Ecology
  • Microbiology
  • Biogeography

Background:

  • Large-scale diversity patterns are known for macrobiota but not for microscopic organisms like nematodes.
  • Microbiota, including nematodes, are often assumed to have cosmopolitan distributions due to their size and dispersal capabilities.
  • Previous studies, often using morphological methods on a local scale, supported this assumption.

Purpose of the Study:

  • To investigate nematode diversity patterns in temperate and tropical rainforests.
  • To determine if nematodes exhibit biogeographical patterns similar to macrobiota.
  • To challenge the assumption of cosmopolitanism in microbiota.

Main Methods:

  • Conducted a survey of nematode diversity in soil, litter, and canopy strata of rainforests in Washington, U.S.A. and Costa Rica.
  • Employed standardized sampling and processing protocols.
  • Utilized an ecometagenomic approach with 454 pyrosequencing to analyze nematode diversity.

Main Results:

  • Nematode communities were unique to each rainforest and distinct across habitats within each rainforest.
  • Tropical rainforests showed 300% higher species richness than temperate rainforests.
  • Over 90% of identified nematode species were novel, and distribution patterns differed significantly between the two rainforests and their strata.

Conclusions:

  • Nematode communities do not exhibit cosmopolitan distributions at local or large spatial scales.
  • Biogeographical patterns observed in macrobiota are also present in microbiota.
  • The study highlights the need for molecular approaches to understand microbial diversity and distribution.