DOI: 10.1111/gcb.12848
论文题名: Moss δ13C: An accurate proxy for past water environments in polar regions
作者: Bramley-Alves J. ; Wanek W. ; French K. ; Robinson S.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 6 起始页码: 2454
结束页码: 2464
语种: 英语
英文关键词: Antarctica
; Bioavailable water
; Cell wall thickness
; Cellulose
; Climate change
; Proxies
; δ13C
Scopus关键词: aridity
; bioavailability
; cellulose
; climate variation
; moss
; paleoenvironment
; polar region
; proxy climate record
; Antarctica
; East Antarctica
; Windmill Islands
; Bryophyta
; carbohydrate
; carbon
; cellulose
; water
; Antarctica
; chemistry
; climate change
; cold climate
; metabolism
; moss
; season
; Antarctic Regions
; Bryophyta
; Carbohydrates
; Carbon Isotopes
; Cellulose
; Climate Change
; Cold Climate
; Seasons
; Water
英文摘要: Increased aridity is of global concern. Polar regions provide an opportunity to monitor changes in bioavailable water free of local anthropogenic influences. However, sophisticated proxy measures are needed. We explored the possibility of using stable carbon isotopes in segments of moss as a fine-scale proxy for past bioavailable water. Variation in δ13C with water availability was measured in three species across three peninsulas in the Windmill Islands, East Antarctica and verified using controlled chamber experiments. The δ13C from Antarctic mosses accurately recorded long-term variations in water availability in the field, regardless of location, but significant disparities in δ13C between species indicated some make more sensitive proxies. δ13CSUGAR derived from living tissues can change significantly within the span of an Antarctic season (5 weeks) in chambers, but under field conditions, slow growth means that this technique likely represents multiple seasons. δ13CCELLULOSE provides a precise and direct proxy for bioavailable water, allowing reconstructions for coastal Antarctica and potentially other cold regions over past centuries. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61894
Appears in Collections: 影响、适应和脆弱性
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作者单位: Institute for Conservation Biology, School of Biological Sciences, University of Wollongong, Wollongong, NSW, Australia; Faculty of Life Sciences, Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria
Recommended Citation:
Bramley-Alves J.,Wanek W.,French K.,et al. Moss δ13C: An accurate proxy for past water environments in polar regions[J]. Global Change Biology,2015-01-01,21(6)