A meta-analysis on decomposition quantifies afterlife effects of plant diversity as a global change driver

Akira S. Mori*, J. Hans C. Cornelissen, Saori Fujii, Kei ichi Okada, Forest Isbell

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Biodiversity loss can alter ecosystem functioning; however, it remains unclear how it alters decomposition—a critical component of biogeochemical cycles in the biosphere. Here, we provide a global-scale meta-analysis to quantify how changes in the diversity of organic matter derived from plants (i.e. litter) affect rates of decomposition. We find that the after-life effects of diversity were significant, and of substantial magnitude, in forests, grasslands, and wetlands. Changes in plant diversity could alter decomposition rates by as much as climate change is projected to alter them. Specifically, diversifying plant litter from mono- to mixed-species increases decomposition rate by 34.7% in forests worldwide, which is comparable in magnitude to the 13.6–26.4% increase in decomposition rates that is projected to occur over the next 50 years in response to climate warming. Thus, biodiversity changes cannot be solely viewed as a response to human influence, such as climate change, but could also be a non-negligible driver of future changes in biogeochemical cycles and climate feedbacks on Earth.

Original languageEnglish
Article number4547
Pages (from-to)1-9
Number of pages9
JournalNature Communications
Volume11
Issue number1
Early online date11 Sep 2020
DOIs
Publication statusPublished - 1 Dec 2020

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