Abstract:
:Identifying the type and strength of interactions between local anthropogenic and other stressors can help to set achievable management targets for degraded marine ecosystems and support their resilience by identifying local actions. We undertook a meta-analysis, using data from 118 studies to test the hypothesis that ongoing global declines in the dominant habitat along temperate rocky coastlines, forests of canopy-forming algae and/or their replacement by mat-forming algae are driven by the nonadditive interactions between local anthropogenic stressors that can be addressed through management actions (fishing, heavy metal pollution, nutrient enrichment and high sediment loads) and other stressors (presence of competitors or grazers, removal of canopy algae, limiting or excessive light, low or high salinity, increasing temperature, high wave exposure and high UV or CO2 ), not as easily amenable to management actions. In general, the cumulative effects of local anthropogenic and other stressors had negative effects on the growth and survival of canopy-forming algae. Conversely, the growth or survival of mat-forming algae was either unaffected or significantly enhanced by the same pairs of stressors. Contrary to our predictions, the majority of interactions between stressors were additive. There were however synergistic interactions between nutrient enrichment and heavy metals, the presence of competitors, low light and increasing temperature, leading to amplified negative effects on canopy-forming algae. There were also synergistic interactions between nutrient enrichment and increasing CO2 and temperature leading to amplified positive effects on mat-forming algae. Our review of the current literature shows that management of nutrient levels, rather than fishing, heavy metal pollution or high sediment loads, would provide the greatest opportunity for preventing the shift from canopy to mat-forming algae, particularly in enclosed bays or estuaries because of the higher prevalence of synergistic interactions between nutrient enrichment with other local and global stressors, and as such it should be prioritized.
journal_name
Glob Chang Bioljournal_title
Global change biologyauthors
Strain EM,Thomson RJ,Micheli F,Mancuso FP,Airoldi Ldoi
10.1111/gcb.12619subject
Has Abstractpub_date
2014-11-01 00:00:00pages
3300-12issue
11eissn
1354-1013issn
1365-2486journal_volume
20pub_type
杂志文章,meta分析,评审abstract::In macroalgal-dominated systems, herbivory is a major driver in controlling ecosystem structure. However, the role of altered plant-herbivore interactions and effects of changes to trophic control under global change are poorly understood. This is because both macroalgae and grazers themselves may be affected by globa...
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pub_type: 杂志文章
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更新日期:2018-02-01 00:00:00
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pub_type: 杂志文章
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更新日期:2018-02-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Global change biology
pub_type: 杂志文章
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更新日期:2017-11-01 00:00:00
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journal_title:Global change biology
pub_type: 杂志文章
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