Work

Community recomposition caused by species extinction in the colonization-competition trade-off model for vegetation

Year: 2024

Type: article

Abstract: • We study effects of species extinction in a colonization-competition model. • Extinction leads to strong increase in abundance of the next inferior competitor. • Increase results in a subsequent extinction of the next-but-one inferior competitor. • Parameterization with theoretical and empirical rank-abundance distributions. Species extinction and the resulting impact on the community composition is a pervasive threat to vegetation ecosystems today. Understanding how the extinction of one or more species affects and threatens biodiversity is challenging. Here, we study the scenario of a sudden species extinction in the colonization-competition trade-off model by assuming that a disturbance eliminates a species on a fleeting time scale. The system then returns to equilibrium, but the equilibrial abundances have changed for all inferior competitors. We use numerical and analytical calculations to show that the sudden extinction of one species results in a large increase in abundance of the next inferior competitor and subsequent additional extinction of the next-but-one inferior species. We present the changes in community composition and diversity using rank abundance distributions and the Shannon index, respectively. In addition to theoretical parameterizations, we use data for grasslands, which are exponentially distributed, where additional species extinctions occur.

Source: Ecological Modelling

DOI: 10.1016/j.ecolmodel.2024.110906

Authors: Dorian Nothaaß, Andreas Huth

Institutions: Helmholtz Centre for Environmental Research, Osnabrück University, German Centre for Integrative Biodiversity Research

Language: English

Topic: Ecology and Vegetation Dynamics Studies

Subfield: Nature and Landscape Conservation

Field: Environmental Science

Domain: Physical Sciences

SDG: Life on land

Open Access status: hybrid

Estimated APC paid: $2,860