Unexpected resilience of a seagrass system exposed to global stressors
Unexpected resilience of a seagrass system exposed to global stressors
复制标题
遭受全球压力的海草系统具有意想不到的恢复力
DOI:
10.1111/gcb.13854
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发表时间:
2018
影响因子:
11.6
通讯作者:
Kroeker, Kristy J.
中科院分区:
文献类型:
--
作者:
Hughes, Brent B.;Lummis, Sarah C.;Anderson, Sean C.;Kroeker, Kristy J.
Despite a growing interest in identifying tipping points in response to environmental change, our understanding of the ecological mechanisms underlying nonlinear ecosystem dynamics is limited. Ecosystems governed by strong species interactions can provide important insight into how nonlinear relationships between organisms and their environment propagate through ecosystems, and the potential for environmentally mediated species interactions to drive or protect against sudden ecosystem shifts. Here, we experimentally determine the functional relationships (i.e., the shapes of the relationships between predictor and response variables) of a seagrass assemblage with well‐defined species interactions to ocean acidification (enrichment of CO2) in isolation and in combination with nutrient loading. We demonstrate that the effect of ocean acidification on grazer biomass (Phyllaplysia tayloriandIdotea resecata) was quadratic, with the peak of grazer biomass at mid‐pH levels. Algal grazing was negatively affected by nutrients, potentially due to low grazer affinity for macroalgae (Ulva intestinalis), as recruitment of both macroalgae and diatoms were favored in elevated nutrient conditions. This led to an exponential increase in macroalgal and epiphyte biomass with ocean acidification, regardless of nutrient concentration. When left unchecked, algae can cause declines in seagrass productivity and persistence through shading and competition. Despite quadratic and exponential functional relationships to stressors that could cause a nonlinear decrease in seagrass biomass, productivity of our model seagrass—the eelgrass (Zostera marina)‐ remained highly resilient to increasing acidification. These results suggest that important species interactions governing ecosystem dynamics may shift with environmental change, and ecosystem state may be decoupled from ecological responses at lower levels of organization.
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DOI:
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发表时间:
1993
期刊:
影响因子:
--
作者:
Susan L. Williams;M. Ruckelshaus
通讯作者:
M. Ruckelshaus
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Laura K. Reynolds;Lindsey A. Carr;K. Boyer
通讯作者:
K. Boyer
影响因子:
64.8
作者:
Doak, Daniel F.;Morris, William F.
通讯作者:
Morris, William F.
影响因子:
11.6
作者:
Kroeker KJ;Kordas RL;Crim R;Hendriks IE;Ramajo L;Singh GS;Duarte CM;Gattuso JP
通讯作者:
Gattuso JP
DOI:
--
发表时间:
1980
期刊:
影响因子:
--
作者:
R. Morris;D. P. Abbott;E. C. Haderlie
通讯作者:
E. C. Haderlie