| DOI: | 10.1111/gcb.13546
|
| 论文题名: | Estuary–ocean connectivity: fast physics, slow biology |
| 作者: | Raimonet M.; Cloern J.E.
|
| 刊名: | Global Change Biology
|
| ISSN: | 13541013
|
| 出版年: | 2017
|
| 卷: | 23, 期:6 | | 起始页码: | 2345
|
| 结束页码: | 2357
|
| 语种: | 英语
|
| 英文关键词: | climate change
; crustaceans
; estuary
; estuary–ocean exchange
; fish
; nutrient management
; ocean climate
; phytoplankton
; temperature
; upwelling
|
| Scopus关键词: | Bivalvia
; Crustacea
|
| 英文摘要: | Estuaries are connected to both land and ocean so their physical, chemical, and biological dynamics are influenced by climate patterns over watersheds and ocean basins. We explored climate-driven oceanic variability as a source of estuarine variability by comparing monthly time series of temperature and chlorophyll-a inside San Francisco Bay with those in adjacent shelf waters of the California Current System (CCS) that are strongly responsive to wind-driven upwelling. Monthly temperature fluctuations inside and outside the Bay were synchronous, but their correlations weakened with distance from the ocean. These results illustrate how variability of coastal water temperature (and associated properties such as nitrate and oxygen) propagates into estuaries through fast water exchanges that dissipate along the estuary. Unexpectedly, there was no correlation between monthly chlorophyll-a variability inside and outside the Bay. However, at the annual scale Bay chlorophyll-a was significantly correlated with the Spring Transition Index (STI) that sets biological production supporting fish recruitment in the CCS. Wind forcing of the CCS shifted in the late 1990s when the STI advanced 40 days. This shift was followed, with lags of 1–3 years, by 3- to 19-fold increased abundances of five ocean-produced demersal fish and crustaceans and 2.5-fold increase of summer chlorophyll-a in the Bay. These changes reflect a slow biological process of estuary–ocean connectivity operating through the immigration of fish and crustaceans that prey on bivalves, reduce their grazing pressure, and allow phytoplankton biomass to build. We identified clear signals of climate-mediated oceanic variability in this estuary and discovered that the response patterns vary with the process of connectivity and the timescale of ocean variability. This result has important implications for managing nutrient inputs to estuaries connected to upwelling systems, and for assessing their responses to changing patterns of upwelling timing and intensity as the planet continues to warm. © 2016 Published by John Wiley & Sons Ltd This article has been contributed to by US Government employees and their work is in the public domain in the USA. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/60953
|
| Appears in Collections: | 影响、适应和脆弱性
|
|
There are no files associated with this item.
|
|
作者单位: | LEMAR, IUEM, CNRS, IRD, Ifremer, Univ Brest, Plouzané, France; U. S. Geological Survey, 345 Middlefield Rd., Menlo Park, CA, United States
|
| Recommended Citation: | |
Raimonet M.,Cloern J.E.. Estuary–ocean connectivity: fast physics, slow biology[J]. Global Change Biology,2017-01-01,23(6)
|
|
|