Regional climate and local-scale biotic acceptance explain native-exotic richness relationships in Australian annual plant communities.

ABSTRACT: Native and exotic species richness is expected to be negatively related at small spatial scales where individuals interact, and positive at larger spatial scales as a greater variety of habitats are sampled. However, a range of native-exotic richness relationships (NERRs) have been reported, including positive at small scales and negative at larger scales. We present a hierarchical metacommunity framework to explain how contrasting NERRs may emerge across scales and study systems, and then apply this framework to NERRs in an invaded winter annual plant system in southwest Western Australia. We analysed NERRs at increasing spatial scales from neighbourhoods (0.09 m²) to communities (225 m²) to metacommunities (greater than 10 ha) within a multilevel structural equation

SUBMITTER: Towers IR 

PROVIDER: S-EPMC6158526 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature