Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13906 |
Nutrients and temperature additively increase stream microbial respiration | |
Manning, David W. P.1; Rosemond, Amy D.1; Gulis, Vladislav2; Benstead, Jonathan P.3; Kominoski, John S.1,4 | |
2018 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:1页码:E233-E247 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Rising temperatures and nutrient enrichment are co-occurring global-change drivers that stimulate microbial respiration of detrital carbon, but nutrient effects on the temperature dependence of respiration in aquatic ecosystems remain uncertain. We measured respiration rates associated with leaf litter, wood, and fine benthic organic matter (FBOM) across seasonal temperature gradients before (PRE) and after (ENR1, ENR2) experimental nutrient (nitrogen [N] and phosphorus [P]) additions to five forest streams. Nitrogen and phosphorus were added at different N: P ratios using increasing concentrations of N (similar to 80-650 lg/L) and corresponding decreasing concentrations of P (similar to 90-11 lg/L). We assessed the temperature dependence, and microbial (i.e., fungal) drivers of detrital mass-specific respiration rates using the metabolic theory of ecology, before vs. after nutrient enrichment, and across N and P concentrations. Detrital mass-specific respiration rates increased with temperature, exhibiting comparable activation energies (E, electronvolts [eV]) for all substrates (FBOM E = 0.43 [95% CI = 0.18-0.69] eV, leaf litter E = 0.30 [95% CI = 0.072-0.54] eV, wood E = 0.41 [95% CI = 0.18-0.64] eV) close to predicted MTE values. There was evidence that temperature-driven increased respiration occurred via increased fungal biomass (wood) or increased fungal biomass-specific respiration (leaf litter). Respiration rates increased under nutrient-enriched conditions on leaves (1.329) and wood (1.389), but not FBOM. Respiration rates responded weakly to gradients in N or P concentrations, except for positive effects of P on wood respiration. The temperature dependence of respiration was comparable among years and across N or P concentration for all substrates. Responses of leaf litter and wood respiration to temperature and the combined effects of N and P were similar in magnitude. Our data suggest that the temperature dependence of stream microbial respiration is unchanged by nutrient enrichment, and that increased temperature and N + P availability have additive and comparable effects on microbial respiration rates. |
英文关键词 | benthic organic matter metabolic theory of ecology microbial activity nitrogen phosphorus rivers temperature dependence |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426506100019 |
WOS关键词 | LITTER DECOMPOSITION ; LEAF-LITTER ; DETRITAL STOICHIOMETRY ; DISSOLVED NUTRIENTS ; BIOMASS ; PHOSPHORUS ; ENRICHMENT ; BREAKDOWN ; ECOSYSTEM ; QUALITY |
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/17853 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Georgia, Odum Sch Ecol, Athens, GA 30602 USA; 2.Coastal Carolina Univ, Dept Biol, Conway, SC USA; 3.Univ Alabama, Dept Biol Sci, Tuscaloosa, AL USA; 4.Florida Int Univ, Dept Biol Sci, Miami, FL USA |
推荐引用方式 GB/T 7714 | Manning, David W. P.,Rosemond, Amy D.,Gulis, Vladislav,et al. Nutrients and temperature additively increase stream microbial respiration[J]. GLOBAL CHANGE BIOLOGY,2018,24(1):E233-E247. |
APA | Manning, David W. P.,Rosemond, Amy D.,Gulis, Vladislav,Benstead, Jonathan P.,&Kominoski, John S..(2018).Nutrients and temperature additively increase stream microbial respiration.GLOBAL CHANGE BIOLOGY,24(1),E233-E247. |
MLA | Manning, David W. P.,et al."Nutrients and temperature additively increase stream microbial respiration".GLOBAL CHANGE BIOLOGY 24.1(2018):E233-E247. |
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