DOI: 10.1111/gcb.14278
Scopus记录号: 2-s2.0-85046540063
论文题名: Warming intensify CO2 flux and nutrient release from algal wrack subsidies on sandy beaches
作者: Lastra M. ; López J. ; Rodil I.F.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3766
结束页码: 3779
语种: 英语
英文关键词: CO 2
; DNA
; global warming
; nutrients
; open top chambers
; organic enrichment
; wrack decay
Scopus关键词: alga
; beach
; biogeochemistry
; carbon dioxide
; carbon flux
; DNA
; global warming
; nutrient
; soil temperature
; Western Europe
; algae
英文摘要: Algal wrack subsidies underpin most of the food web structure of exposed sandy beaches and are responsible of important biogeochemical processes that link marine and terrestrial ecosystems. The response in decomposition of algal wrack deposits to global warming has not been studied in ocean-exposed sandy beaches to date. With this aim, passive open top chambers (OTCs) were used to increase soil temperature within the range predicted by the IPCC for western Europe (between 0.5 and 1.5°C), following the hypothesis that the biogeochemical processing of macroalgal wrack subsidies would accelerate in response to temperature increase. The effect of temperature manipulation on three target substrates: fresh and aged macroalgae, and bare sand, was tested. Results indicated that a small warming (<0.5°C) affected the wrack decomposition process through traceable increases in soil respiration through CO2 flux, inorganic nutrients within the interstitial environment (N and P), sediment organic contents measured through the amount of proteins and microbial pool through the total soil DNA. The different responses of soil variables in the studied substrates indicated that the decomposition stage of stranded macroalgae influences the biogeochemical processing of organic matter in sandy beaches. Thus, CO2 fluxes, releases of organic and inorganic nutrients and microbial activity intensify in aged wrack deposits. Our results predict that expected global warming will increase the release of inorganic nutrients to the coastal ocean by 30% for the N (21 Gg/year) and 5.9% for P (14 Gg/year); that increase for the flow of C to the atmosphere as CO2 was estimated in 8.2% (523 Gg/year). This study confirms the key role of sandy beaches in recycling ocean-derived organic matter, highlighting their sensitivity to a changing scenario of global warming that predicts significant increases in temperature over the next few decades. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110296
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Ecology and Animal Biology, Marine Science Faculty, University of Vigo, Vigo, Spain; Toralla Marine Science Station (ECIMAT), University of Vigo, Vigo, Spain; Tvärminne Zoological Station, University of Helsinki, Hanko, Finland; Baltic Sea Centre, Stockholm University, Stockholm, Sweden
Recommended Citation:
Lastra M.,López J.,Rodil I.F.. Warming intensify CO2 flux and nutrient release from algal wrack subsidies on sandy beaches[J]. Global Change Biology,2018-01-01,24(8)