DOI: 10.1007/s10533-013-9932-3
Scopus记录号: 2-s2.0-84891902231
论文题名: Enzymatic and detrital influences on the structure, function, and dynamics of spatially-explicit model ecosystems
作者: Moore J.C. ; Boone R.B. ; Koyama A. ; Holfelder K.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 1 起始页码: 205
结束页码: 227
语种: 英语
英文关键词: Agent-based model
; Enzymes
; Soil food web
; Spatial distribution
; Trophic structure
Scopus关键词: carbon cycle
; detritus
; ecosystem function
; ecosystem modeling
; ecosystem structure
; enzyme activity
; food web
; predator
; soil ecosystem
; spatial distribution
英文摘要: We developed agent-based models patterned after the equation-based models developed by Schimel and Weintraub (Soil Biol Biochem 35:549-563, 2003) to explore the influence of microbial-derived extracellular enzymes on carbon (C) dynamics. The models featured spatial arrangements of detritus as either randomly-spaced particles (rain) or as root-like structures (root), detritus input intervals (continuous vs. pulsed) and rates (0-5,000 units in 500 unit intervals), trophic structures (presence or absence of predators preying on microbes), and extracellular enzymes with different half-lives (1, 10, 100, and 1,000 time steps). We studied how these features affected C dynamics and model persistence (no extinctions). Models without predators were more likely to persist than those with predators, and their C dynamics could be explained with energetics-based arguments. When predators were present, two of the four model configurations-root-continuous and rain-pulsed-were more likely to persist. The root-continuous models were more likely to persist at lower detritus input rates (500-3,500 units), while the rain-pulsed models were more likely to persist at intermediate detritus input rates (2,000-3,500 units). For both these model configurations, shorter extracellular enzyme half-lives increased the likelihood of persistence. Consistent with the results of Schimel and Weintraub (Soil Biol Biochem 35:549-563, 2003), C dynamics was governed by extracellular enzyme production activity and loss. Our results demonstrated that extracellular enzyme control of C dynamics depends on the spatial arrangement of resources, the input rate and input intervals of detritus and trophic structure. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83612
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 Ecosystem Sciences and Sustainability, Colorado State University, Fort Collins, CO, 80523, United States; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, United States; Department of Biology, Colorado State University, Fort Collins, CO, 80523, United States; Colorado Natural Heritage Program, Colorado State University, Fort Collins, CO, 80523, United States
Recommended Citation:
Moore J.C.,Boone R.B.,Koyama A.,et al. Enzymatic and detrital influences on the structure, function, and dynamics of spatially-explicit model ecosystems[J]. Biogeochemistry,2014-01-01,117(1)