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DOI | 10.1016/j.scitotenv.2018.11.050 |
Leaf litter microbial decomposition in salinized streams under intermittency | |
Goncalves, Ana Lucia1; Simoes, Sara1; Barlocher, Felix2; Canhoto, Cristina1 | |
发表日期 | 2019 |
ISSN | 0048-9697 |
EISSN | 1879-1026 |
卷号 | 653页码:1204-1212 |
英文摘要 | Human-induced salinization of freshwaters constitutes a growing global problem, whose consequences on streams functioning are largely unknown. Climate change projections predict enhanced evaporation, as well as an increase in extreme events and in variability of precipitation. This will result in more frequent, extended and severe drought periods that may aggravate water salinization of streams and rivers. In this study we conducted a microcosm experiment to assess the combined effects of three drought regimes - abrupt (AD), slow (SD) and very slow transition to dryness (VSD) - and three levels of salinization (0, 4, 6 g L-1 NaCl) on microbial-mediated oak leaf decomposition over ten weeks. Salinization did not affect mass loss and associated microbial respiration of colonized oak leaves but significantly reduced the biomass and eliminated the sporulating capacity of fungi. Desiccation negatively affected leaf decomposition regardless of regime. Even though microbial respiration did not react to the different treatments, lower fungal biomass, diversity, and conidial production were observed under AD; for fungal biomass these effects were amplified at higher salt concentrations (particularly at 6 g L-1). Our results indicate that effects of leaf litter desiccation depend on the rate of transition between wet and dry conditions and on the level of salt in the water. The two factors jointly affect decomposer survival and activity and, by extension, the dynamics of detrital food webs in streams. (c) 2018 Elsevier B.V. All rights reserved. |
WOS研究方向 | Environmental Sciences & Ecology |
来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/93661 |
作者单位 | 1.Univ Coimbra, Dept Life Sci, Ctr Funct Ecol, P-3000456 Coimbra, Portugal; 2.Mt Allison Univ, Dept Biol, Sackville, NB, Canada |
推荐引用方式 GB/T 7714 | Goncalves, Ana Lucia,Simoes, Sara,Barlocher, Felix,et al. Leaf litter microbial decomposition in salinized streams under intermittency[J],2019,653:1204-1212. |
APA | Goncalves, Ana Lucia,Simoes, Sara,Barlocher, Felix,&Canhoto, Cristina.(2019).Leaf litter microbial decomposition in salinized streams under intermittency.SCIENCE OF THE TOTAL ENVIRONMENT,653,1204-1212. |
MLA | Goncalves, Ana Lucia,et al."Leaf litter microbial decomposition in salinized streams under intermittency".SCIENCE OF THE TOTAL ENVIRONMENT 653(2019):1204-1212. |
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