Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14706 |
Climate and fishing drive regime shifts in consumer-mediated nutrient cycling in kelp forests | |
Peters, Joseph R.1,2; Reed, Daniel C.1; Burkepile, Deron E.1,2 | |
2019-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:9页码:3179-3192 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Globally, anthropogenic pressures are reducing the abundances of marine species and altering ecosystems through modification of trophic interactions. Yet, consumer declines also disrupt important bottom-up processes, like nutrient recycling, which are critical for ecosystem functioning. Consumer-mediated nutrient dynamics (CND) is now considered a major biogeochemical component of most ecosystems, but lacking long-term studies, it is difficult to predict how CND will respond to accelerating disturbances in the wake of global change. To aid such predictions, we coupled empirical ammonium excretion rates with an 18-year time series of the standing biomass of common benthic macroinvertebrates in southern California kelp forests. This time series of excretion rates encompassed an extended period of extreme ocean warming, disease outbreaks, and the abolishment of fishing at two of our study sites, allowing us to assess kelp forest CND across a wide range of environmental conditions. At their peak, reef invertebrates supplied an average of 18.3 +/- 3.0 mu mol NH4+ m(-2) hr(-1) to kelp forests when sea stars were regionally abundant, but dropped to 3.5 +/- 1.0 mu mol NH4+ m(-2) hr(-1) following their mass mortality due to disease during a prolonged period of extreme warming. However, a coincident increase in the abundance of the California spiny lobster, Palinurus interupptus (Randall, 1840), likely in response to both reduced fishing and a warmer ocean, compensated for much of the recycled ammonium lost to sea star mortality. Both lobsters and sea stars are widely recognized as key predators that can profoundly influence community structure in benthic marine systems. Our study is the first to demonstrate their importance in nutrient cycling, thus expanding their roles in the ecosystem. Climate change is increasing the frequency and severity of warming events, and rising human populations are intensifying fishing pressure in coastal ecosystems worldwide. Our study documents how these projected global changes can drive regime shifts in CND and fundamentally alter a critical ecosystem function. |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000478644100025 |
WOS关键词 | MARINE PROTECTED AREAS ; NET PRIMARY PRODUCTION ; GIANT-KELP ; MACROCYSTIS-PYRIFERA ; SPINY LOBSTER ; AMMONIUM EXCRETION ; SEASONAL GROWTH ; FRESH-WATER ; LAMINARIA-LONGICRURIS ; TROPHIC CASCADE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/186703 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Calif Santa Barbara, Inst Marine Sci, Santa Barbara, CA 93106 USA; 2.Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA |
推荐引用方式 GB/T 7714 | Peters, Joseph R.,Reed, Daniel C.,Burkepile, Deron E.. Climate and fishing drive regime shifts in consumer-mediated nutrient cycling in kelp forests[J]. GLOBAL CHANGE BIOLOGY,2019,25(9):3179-3192. |
APA | Peters, Joseph R.,Reed, Daniel C.,&Burkepile, Deron E..(2019).Climate and fishing drive regime shifts in consumer-mediated nutrient cycling in kelp forests.GLOBAL CHANGE BIOLOGY,25(9),3179-3192. |
MLA | Peters, Joseph R.,et al."Climate and fishing drive regime shifts in consumer-mediated nutrient cycling in kelp forests".GLOBAL CHANGE BIOLOGY 25.9(2019):3179-3192. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论