Removal of intertidal grazers by human harvesting leads to alteration of species interactions, community structure and resilience to climate change.

摘要: Abstract Extreme fluctuations in abiotic conditions can induce a biological stress response (e.g. bleaching) detrimental to an organism's health. In some instances, organisms recover if are alleviated, such as through co-occurrence with other species that confer protection. Biodiverse, multitrophic communities increasingly recognised important promoters of persistence and resilience under environmental change. On intertidal shores, the role grazers top-down determinants algal community structure is well recognised. Similarly, harvesting for human consumption prevalent potential greatly alter dynamics. Here, we assess how differences pressure three management regimes (no-take; managed access; open-access) alters trophic interactions between grazers, communities. Grazer density body size frequencies were different among leading changes photosynthetic performance recovery crustose coralline algae (CCA) post-bleaching, their presence altering strength species. The exclusion from patches using cages led emergent reduced negative correlations taxa. absence larger (>9 cm) at access site macroalgal overgrowth bleached CCA negatively affecting its recovery, whereas no-take or open-access moderated growth shift competitive facilitative Given play population development species, choice measure should be carefully considered before implementation, depending on objectives.