Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13779 |
Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities | |
Ayo, Begona1,2; Abad, Naiara1; Artolozaga, Itxaso1; Azua, Inigo1; Bana, Zurine1; Unanue, Marian1; Gasol, Josep M.3; Duarte, Carlos M.4,5; Iriberri, Juan1,2 | |
2017-10-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; Saudi Arabia |
英文摘要 | Ocean oligotrophication concurrent with warming weakens the capacity of marine primary producers to support marine food webs and act as a CO2 sink, and is believed to result from reduced nutrient inputs associated to the stabilization of the thermocline. However, nutrient supply in the oligotrophic ocean is largely dependent on the recycling of organic matter. This involves hydrolytic processes catalyzed by extracellular enzymes released by bacteria, which temperature dependence has not yet been evaluated. Here, we report a global assessment of the temperature-sensitivity, as represented by the activation energies (E-a), of extracellular beta-glucosidase (beta G), leucine aminopeptidase (LAP) and alkaline phosphatase (AP) enzymatic activities, which enable the uptake by bacteria of substrates rich in carbon, nitrogen, and phosphorus, respectively. These E-a were calculated from two different approaches, temperature experimental manipulations and a space-for-time substitution approach, which generated congruent results. The three activities showed contrasting E-a in the subtropical and tropical ocean, with beta G increasing the fastest with warming, followed by LAP, while AP showed the smallest increase. The estimated activation energies predict that the hydrolysis products under projected warming scenarios will have higher C:N, C:P and N:P molar ratios than those currently generated, and suggest that the warming of oceanic surface waters leads to a decline in the nutrient supply to the microbial heterotrophic community relative to that of carbon, particularly so for phosphorus, slowing down nutrient recycling and contributing to further ocean oligotrophication. |
英文关键词 | beta-glucosidase alkaline phosphatase C:N:P molar ratio extracellular enzymatic activity global warming leucine aminopeptidase subtropical and tropical ocean temperature-sensitivity |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410642100011 |
WOS关键词 | ALKALINE-PHOSPHATASE ACTIVITY ; DISSOLVED ORGANIC-MATTER ; TEMPERATURE SENSITIVITY ; PHYTOPLANKTON BLOOMS ; NITROGEN-METABOLISM ; GRADIENT METHODS ; ENZYMES ; SOIL ; STOICHIOMETRY ; KINETICS |
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/16500 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Basque Country UPV EHU, Fac Sci & Technol, Dept Immunol Microbiol & Parasitol, Leioa, Spain; 2.Res Ctr Expt Marine Biol & Biotechnol PiE UPV EHU, Plentzia Bizkaia, Spain; 3.CSIC, Inst Ciencies Mar, Barcelona, Spain; 4.Inst Mediterraneo Estudios Avanzados CSIC UIB, Dept Global Change Res, Esporles, Spain; 5.King Abdullah Univ Sci & Technol KAUST, Red Sea Res Ctr RSRC, Biol & Environm Sci & Engn Div, Thuwal, Saudi Arabia |
推荐引用方式 GB/T 7714 | Ayo, Begona,Abad, Naiara,Artolozaga, Itxaso,et al. Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities[J]. GLOBAL CHANGE BIOLOGY,2017,23(10). |
APA | Ayo, Begona.,Abad, Naiara.,Artolozaga, Itxaso.,Azua, Inigo.,Bana, Zurine.,...&Iriberri, Juan.(2017).Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities.GLOBAL CHANGE BIOLOGY,23(10). |
MLA | Ayo, Begona,et al."Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities".GLOBAL CHANGE BIOLOGY 23.10(2017). |
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