Tropical herbivores provide resilience to a climate-mediated phase shift on temperate reefs

被引：135

作者：

Bennett, Scott ^{[1
,2
]}

Wernberg, Thomas ^{[1
,2
]}

Harvey, Euan S. ^{[3
]}

Santana-Garcon, Julia ^{[1
,2
]}

Saunders, Benjamin J. ^{[3
]}

机构：

[1] Univ Western Australia, Sch Plant Biol, Crawley, WA 6009, Australia

[2] Univ Western Australia, UWA Oceans Inst, Crawley, WA 6009, Australia

[3] Curtin Univ, Dept Environm & Agr, Bentley, WA 6102, Australia

来源：

ECOLOGY LETTERS | 2015年 / 18卷 / 07期

基金：

澳大利亚研究理事会;

关键词：

Climate change; coral reef; fishes; kelp; regime shift; tropicalisation; TROPHIC CASCADES; DECREASING RESILIENCE; MACROALGAL HERBIVORY; WESTERN-AUSTRALIA; REMOTE VIDEO; KELP BEDS; CORAL; FISHES; IMPACT; PARROTFISHES;

D O I：

10.1111/ele.12450

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Climate-mediated changes to biotic interactions have the potential to fundamentally alter global ecosystems. However, the capacity for novel interactions to drive or maintain transitions in ecosystem states remains unresolved. We examined temperate reefs that recently underwent complete seaweed canopy loss and tested whether a concurrent increase in tropical herbivores could be maintaining the current canopy-free state. Turf-grazing herbivorous fishes increased in biomass and diversity, and displayed feeding rates comparable to global coral reefs. Canopy-browsing herbivores displayed high (similar to 10000g100m(-2)) and stable biomass between 2006 and 2013. Tropical browsers had the highest abundance in 2013 and displayed feeding rates approximately three times higher than previously observed on coral reefs. These observations suggest that tropical herbivores are maintaining previously kelp-dominated temperate reefs in an alternate canopy-free state by grazing turfs and preventing kelp reestablishment. This remarkable ecosystem highlights the sensitivity of biotic interactions and ecosystem stability to warming and extreme disturbance events.

引用

页码：714 / 723

页数：10

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