DOI: 10.1007/s10533-015-0105-4
Scopus记录号: 2-s2.0-84930274613
论文题名: Spatiotemporal dynamics of boreal landscapes with ecosystem engineers: beavers influence the biogeochemistry of small lakes
作者: Vehkaoja M. ; Nummi P. ; Rask M. ; Tulonen T. ; Arvola L.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 124, 期: 2018-01-03 起始页码: 405
结束页码: 415
语种: 英语
英文关键词: Beaver impoundment
; Before–after setting
; Biogeochemical hot spot
; Boreal lakes
; Carbon balance
; Dissolved organic carbon
; Nutrient pulse
Scopus关键词: boreal forest
; carbon cycle
; concentration (composition)
; dissolved organic carbon
; ecosystem engineering
; lake ecosystem
; landscape
; rodent
; spatiotemporal analysis
; water chemistry
; Finland
; Castoridae
英文摘要: It has been suggested that beavers affect biogeochemical processes and the environment on a relatively large scale, thus acting as ecosystem engineers. In this long-term study we evaluated the effects of beavers on water chemistry in small boreal lakes of Southern Finland. We addressed the following three questions; does water chemistry differ between beaver and non-beaver lakes; does water chemistry differ between the flood years in comparison to the antecedent years; and does the flood impact downstream lakes? The results showed that beaver lakes had higher dissolved organic carbon (DOC) concentrations but lower dissolved oxygen (DO) concentrations than non-beaver lakes. DOC concentration increased during the first three beaver-impoundment years when compared to the pre-impoundment situation, and DO concentrations simultaneously decreased. Lake DOC concentrations furthermore declined back to initial levels after the impoundment had lasted for 4–6 years. The opposite occurred with DO. No clear effects caused by beaver impoundments were found in downstream lakes however. Beaver activity had no effect on N and P concentrations in lakes, but our results emphasize that the beaver affects the carbon cycling in the boreal zone. Further research is therefore needed to clarify its effect on the carbon balance at different spatial scales. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83493
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: Department of Forest Sciences, University of Helsinki, P.O. Box 27, Helsinki, Finland; Evo Game and Fisheries Research, Finnish Game and Fisheries Research Institute, Evo, Finland; Lammi Biological Station, University of Helsinki, Lammi, Finland
Recommended Citation:
Vehkaoja M.,Nummi P.,Rask M.,et al. Spatiotemporal dynamics of boreal landscapes with ecosystem engineers: beavers influence the biogeochemistry of small lakes[J]. Biogeochemistry,2015-01-01,124(2018-01-03)