Timing is everything: priority effects alter community invasibility after disturbance.

摘要: Theory suggests that communities should be more open to the establishment of regional species following disturbance because may make resources available dispersers. However, after an initial period high invasibility, growth resident community lead monopolization local and decreased probability successful colonist establishment. During press disturbances (i.e., directional environmental change), it remains unclear what effect dispersal will have on structure if later arriving is affected by early priority effects are important). To determine relationship between time-since-disturbance we conducted a fully factorial field mesocosm experiment exposed tundra zooplankton two emerging stressors – nutrient salt addition, manipulated arrival timing Our results demonstrate invasibility decreases with increasing as abundance (nutrient treatments) or richness (salt increases in community. Results suggest relative change modify importance determining composition disturbance.