A general framework for quantitatively assessing ecological stochasticity

Proceedings of the National Academy of Sciences of the United States of America
Daliang NingJizhong Zhou

Abstract

Understanding the community assembly mechanisms controlling biodiversity patterns is a central issue in ecology. Although it is generally accepted that both deterministic and stochastic processes play important roles in community assembly, quantifying their relative importance is challenging. Here we propose a general mathematical framework to quantify ecological stochasticity under different situations in which deterministic factors drive the communities more similar or dissimilar than null expectation. An index, normalized stochasticity ratio (NST), was developed with 50% as the boundary point between more deterministic (<50%) and more stochastic (>50%) assembly. NST was tested with simulated communities by considering abiotic filtering, competition, environmental noise, and spatial scales. All tested approaches showed limited performance at large spatial scales or under very high environmental noise. However, in all of the other simulated scenarios, NST showed high accuracy (0.90 to 1.00) and precision (0.91 to 0.99), with averages of 0.37 higher accuracy (0.1 to 0.7) and 0.33 higher precision (0.0 to 1.8) than previous approaches. NST was also applied to estimate stochasticity in the succession of a groundwater microbial co...Continue Reading

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Citations

Apr 21, 2020·Microbial Biotechnology·Jo De VriezeWilly Verstraete
May 31, 2020·Journal of Occupational and Environmental Medicine·Oren ZackShlomo Moshe
Jul 16, 2020·Scientific Reports·Marisa O D Silva, Jakob Pernthaler
Aug 29, 2020·The ISME Journal·Stilianos FodelianakisDaniele Daffonchio
Nov 28, 2020·Molecular Ecology Resources·Didac Barroso-BergadàCorinne Vacher
Dec 6, 2020·The Science of the Total Environment·Qun GaoYunfeng Yang
Dec 29, 2020·Computational and Structural Biotechnology Journal·Johan Bengtsson-Palme
Dec 21, 2020·The New Phytologist·Tania FortCorinne Vacher
Nov 12, 2020·FEMS Microbiology Ecology·Francisco PascoalCatarina Magalhães
Apr 24, 2021·FEMS Microbiology Ecology·Yong ZhengLiang-Dong Guo
Jul 1, 2021·Proceedings of the National Academy of Sciences of the United States of America·Giulia DottoriniPer Halkjær Nielsen
Sep 16, 2021·The ISME Journal·Stilianos FodelianakisTom J Battin

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