Frequency-dependent fitness and reproductive dynamics contribute to habitat segregation in sympatric jewelflowers.

ABSTRACT: Coexistence results from a complex suite of past and contemporary processes including biogeographic history, adaptation, ecological interactions and reproductive dynamics. Here we explore drivers of local micro-parapatry in which two closely related and reproductively isolated Streptanthus species (jewelflower, Brassicaceae) inhabit continuous or adjacent habitat patches and occur within seed dispersal range, yet rarely overlap in fine-scale distribution. We find some evidence for abiotic niche partitioning and local adaptation, however differential survival across habitats cannot fully explain the scarcity of coexistence. Competition may also reduce the fitness of individuals migrating into occupied habitats, yet its effects are insufficient to drive competitive exclusion. Experime

SUBMITTER: Christie K 

PROVIDER: S-EPMC7287356 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature