DOI: 10.1016/j.foreco.2014.08.029
Scopus记录号: 2-s2.0-84930638128
论文题名: Calcium oxalate contribution to calcium cycling in forests of contrasting nutrient status
作者: Dauer J.M. ; Perakis S.S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 334 起始页码: 64
结束页码: 73
语种: 英语
英文关键词: Calcium cycling
; Calcium oxalate
; Exchangeable calcium
; Leaf litter decomposition
; Microbial degradation
; Soil nutrients
Scopus关键词: Biodegradation
; Biomass
; Decomposition
; Ecology
; Ecosystems
; Forestry
; Lakes
; Minerals
; Nutrients
; Oxalic acid
; Soils
; Calcium cycling
; Calcium oxalates
; Leaf litter decomposition
; Microbial degradation
; Soil nutrients
; Calcium
; biodegradation
; biomineralization
; calcium
; decomposition
; forest ecosystem
; fungus
; leaf litter
; nutritional status
; soil ecosystem
; soil nutrient
; Calcium
; Ecosystems
; Fungi
; Minerals
; Plants
; Fungi
; Pseudotsuga
; Pseudotsuga menziesii
英文摘要: Calcium oxalate (Ca oxalate) is an insoluble biomineral that forms in plants and fungi, and occurs in soils across many types of ecosystems. Assessing how Ca oxalate may shape ecosystem Ca cycling requires information on the distribution of Ca oxalate among plant biomass, detritus, and mineral soil, and how it varies with ecosystem Ca status. We compared two Douglas-fir forests of contrasting ecosystem Ca availability, and found that Ca oxalate was partitioned similarly among plant biomass, detritus and mineral soil major ecosystem compartments at both sites, and total pools of Ca oxalate were greater in the high-Ca forest. However, the proportional importance of Ca oxalate was greater in the low-Ca than high-Ca forest (18% versus 4% of actively cycling ecosystem Ca, respectively). And calcium oxalate in mineral soil, which is of particular interest as a potential long-term Ca reservoir, was a larger portion of total available Ca (exchangeable Ca plus Ca oxalate Ca) in the low-Ca site than the high-Ca site (9% versus 1% of available soil Ca, respectively). Calcium oxalate was the dominant form of Ca returned from plants to soil as leaf litterfall at the high-Ca site, yet calcium oxalate disappeared rapidly from decomposing litter (0.28yr-1 or faster) at both sites. We conclude that accumulation of Ca oxalate in forest ecosystems appears most closely related to overall Ca supply for live biomass pools, and that the accumulation of Ca oxalate in forest floor and mineral soil is limited by rapid microbial degradation of putatively unavailable Ca oxalate. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65693
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Ecosystems and Society, Oregon State University, 321 Richardson Hall, Corvallis, OR, United States; U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, 3200 SW Jefferson Way, Corvallis, OR, United States
Recommended Citation:
Dauer J.M.,Perakis S.S.. Calcium oxalate contribution to calcium cycling in forests of contrasting nutrient status[J]. Forest Ecology and Management,2014-01-01,334