DOI: 10.1002/2013GB004705
Scopus记录号: 2-s2.0-84893200301
论文题名: Estimating impacts of lichens and bryophytes on global biogeochemical cycles
作者: Porada P ; , Weber B ; , Elbert W ; , Pöschl U ; , Kleidon A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 2 起始页码: 71
结束页码: 85
语种: 英语
英文关键词: global
; lichens
; mosses
; Nutrient cycling
; weathering
Scopus关键词: Biogeochemistry
; Ecology
; Estimation
; Fungi
; Nitrogen
; Nitrogen fixation
; Nutrients
; Phosphorus
; Biogeochemical cycle
; Chemical weathering
; global
; lichens
; mosses
; Nitrogen and phosphorus
; Nutrient cycling
; Surface weathering
; Weathering
; biogeochemical cycle
; biological uptake
; biomass
; bryophyte
; chemical weathering
; estimation method
; leaching
; lichen
; moss
; nitrogen
; nitrogen fixation
; nutrient cycling
; phosphorus
; Bryophyta
; bryophytes
英文摘要: Lichens and bryophytes may significantly affect global biogeochemical cycles by fixation of nitrogen and biotic enhancement of surface weathering rates. Most of the studies suggesting these effects, however, are either conceptual or rely on upscaling of regional estimates to obtain global numbers. Here we use a different method, based on estimates of net carbon uptake, to quantify the impacts of lichens and bryophytes on biogeochemical cycles at the global scale. We focus on three processes, namely, nitrogen fixation, phosphorus uptake, and chemical weathering. Our estimates have the form of potential rates, which means that we quantify the amount of nitrogen and phosphorus needed by the organisms to build up biomass, also accounting for resorption and leaching of nutrients. Subsequently, we use potential phosphorus uptake on bare ground to estimate chemical weathering by the organisms, assuming that they release weathering agents to obtain phosphorus. The predicted requirement for nitrogen ranges from 3.5 to 34 Tgyr-1 and for phosphorus it ranges from 0.46 to 4.6 Tgyr-1. Estimates of chemical weathering are between 0.058 and 1.1 km3 yr-1 of rock. These values seem to have a realistic order of magnitude, and they support the notion that lichens and bryophytes have the potential to play an important role for biogeochemical cycles. Key Points Lichens and bryophytes contribute significantly to global biogeochemical cycles ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77527
Appears in Collections: 气候变化事实与影响
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作者单位: Max Planck Institute for Biogeochemistry, Jena, Germany; Max Planck Institute for Chemistry, Mainz, Germany
Recommended Citation:
Porada P,, Weber B,, Elbert W,et al. Estimating impacts of lichens and bryophytes on global biogeochemical cycles[J]. Global Biogeochemical Cycles,2014-01-01,28(2)