Functional diversity and community assembly of river invertebrates show globally consistent responses to decreasing glacier cover

Lee E. Brown*, Kieran Khamis, Martin Wilkes, Phillip Blaen, John E. Brittain, Jonathan L. Carrivick, Sarah Fell, Nikolai Friberg, Leopold Füreder, Gisli M. Gislason, Sarah Hainie, David M. Hannah, William H.M. James, Valeria Lencioni, Jon S. Olafsson, Christopher T. Robinson, Svein J. Saltveit, Craig Thompson, Alexander M. Milner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)
410 Downloads (Pure)

Abstract

Global change threatens invertebrate biodiversity and its central role in numerous ecosystem functions and services. Functional trait analyses have been advocated to uncover global mechanisms behind biodiversity responses to environmental change, but the application of this approach for invertebrates is underdeveloped relative to other organism groups. From an evaluation of 363 records comprising >1.23 million invertebrates collected from rivers across nine biogeographic regions on three continents, consistent responses of community trait composition and diversity to replicated gradients of reduced glacier cover are demonstrated. After accounting for a systematic regional effect of latitude, the processes shaping river invertebrate functional diversity are globally consistent. Analyses nested within individual regions identified an increase in functional diversity as glacier cover decreases. Community assembly models demonstrated that dispersal limitation was the dominant process underlying these patterns, although environmental filtering was also evident in highly glacierized basins. These findings indicate that predictable mechanisms govern river invertebrate community responses to decreasing glacier cover globally.

Original languageEnglish
Pages (from-to)325–333
Number of pages9
JournalNature Ecology and Evolution
Volume2
Early online date18 Dec 2017
DOIs
Publication statusPublished - Feb 2018

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

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