DOI: 10.1007/s10533-016-0288-3
Scopus记录号: 2-s2.0-85008466075
论文题名: Ecoenzyme activity ratios reveal interactive effects of nutrient inputs and UVR in a Mediterranean high-mountain lake
作者: Velasco Ayuso S. ; Medina-Sánchez J.M. ; Guénon R. ; Carrillo P.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 132, 期: 2018-01-02 起始页码: 71
结束页码: 85
语种: 英语
英文关键词: Ecoenzyme activity (EA) ratios
; Energy/nutrient limitation
; High-mountain lakes
; Mediterranean
; Nutrient inputs
; UVR
Scopus关键词: enzyme activity
; global change
; Mediterranean environment
; microbial activity
; mountain environment
; nutrient enrichment
; nutrient limitation
; ultraviolet radiation
; algae
; Bacteria (microorganisms)
; Prokaryota
英文摘要: To understand how atmospheric dust deposition and ultraviolet radiation (UVR) can affect remote, freshwater ecosystems through changes in their microbial metabolism, it is important to have tools that allow us detecting alterations and anticipating potential shifts in the functioning of microbial communities. Ecoenzyme activities (EA) are easy to measure and their ratios can be used to assess system microbial metabolism of freshwater bodies, thus evaluating the effects of global change stressors. We carried out an in situ full factorial experiment to determine how the interaction between the addition of C and P, and UVR affect the microbial metabolism of a Mediterranean high-mountain lake. Overall, activities of five ecoenzymes involved in the degradation of C-compounds and in the acquisition of N and P revealed that, under natural conditions, the growth of heterotrophic prokaryotes was dependent on organic compounds released by algae, which is consistent with a higher constraint of bacterial carbon production by C than by P or N, as suggested by EA ratios. Accordingly, the addition of a labile C source did not lead to any significant response of microbial communities, but the addition of P provoked a clear change in the microbial metabolism of the lake, promoting the growth of phytoplankton and leading heterotrophic prokaryotes to be more constrained by P, and to a lesser extent by N, in relation to C. UVR played a secondary role, probably because microbial communities inhabiting high-mountain lakes possess several evolutionary adaptations to high UVR levels. Changes in the microbial metabolism of our model lake under different scenarios of nutrient inputs and UVR can therefore be evaluated by EA ratios. © 2017, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83312
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain; School of Life Sciences, Arizona State University, Tempe, AZ, United States; Instituto del Agua, Universidad de Granada, Granada, Spain
Recommended Citation:
Velasco Ayuso S.,Medina-Sánchez J.M.,Guénon R.,et al. Ecoenzyme activity ratios reveal interactive effects of nutrient inputs and UVR in a Mediterranean high-mountain lake[J]. Biogeochemistry,2017-01-01,132(2018-01-02)