Interactions and constraints in model species response to environmental heteroscedasticity

摘要: Increasing environmental variability could exacerbate the effects of climate change on ecological processes such as population dynamics, or positive and negative (favorable unfavorable weather) balance. Such a balance depend constraints processes. Biological spatial are represented in spatially explicit individual based simulation an ecotone reduced to two species single gradient. The amelioration simulated from plant's-eye-view by increasing establishment decreasing mortality rates. Variability is introduced random multiplier these rates, strength variation increased through period change. biological limit extent grid represents constraint. A small increase variation, multiplied time with change, increases extinction have little effect response populations. Instead, competition, form functions gradient at point where they intersect, determines differences responses. Positive variations environment do not because responses hierarchical asymmetric. Differences persist during anomaly cannot be reversed later one.