Sensitivity of four ecological models to adjustments in fine root turnover rate
McCormack, ML; Crisfield, E; Raczka, B; Schnekenburger, F; Eissenstat, DM; Smithwick, EAH
2015
Source PublicationECOLOGICAL MODELLING
ISSN0304-3800
Volume297Pages:107-117
AbstractLarge uncertainties surrounding root-specific parameters limit model descriptions of belowground processes and ultimately hinder understanding of belowground carbon (C) dynamics and terrestrial biogeochemistry. Despite this recognized shortcoming, it is unclear which processes warrant attention in model development, given the computational cost of additional model complexity. Here, we tested the sensitivity of four models to adjustments in fine root turnover in forested systems: CENTURY, ED2, MC1, and LANDCARB. In general, faster root turnover rates resulted in lower total system carbon (C) and within model changes ranged from 1% to 38% following 100-year simulations. However, the underlying mechanisms driving these changes differed among models as some expressed lower net primary productivity (NPP) with faster turnover rates and others had similar NPP but large shifts in C allocation away from wood to fine roots. Based on these findings we expect that different model responses to changes in fine root turnover will be determined by (1) whether C is allocated to fine roots as fixed portion of NPP or to maintain a fixed biomass ratio between fine roots and leaves or stems and (2) whether soil nutrient and water uptake is a function of both resource availability and fine root biomass or based on resource availability alone. These results suggest that better constrained estimates of fine root turnover will represent a valuable improvement in many terrestrial biosphere models. (C) 2014 Elsevier B.V. All rights reserved.
SubtypeJournal
KeywordRoot production Carbon cycle Ecosystem Model sensitivity Carbon allocation Belowground processes
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEcology
WOS KeywordSOIL ORGANIC-MATTER ; GLOBAL VEGETATION MODEL ; LOBLOLLY-PINE FOREST ; ELEVATED CO2 ; PACIFIC-NORTHWEST ; CARBON ALLOCATION ; CLIMATE-CHANGE ; UNITED-STATES ; LIFE-SPAN ; LAND-USE
Indexed BySCI
Language英语
WOS IDWOS:000349425300013
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44451
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
McCormack, ML,Crisfield, E,Raczka, B,et al. Sensitivity of four ecological models to adjustments in fine root turnover rate[J]. ECOLOGICAL MODELLING,2015,297:107-117.
APA McCormack, ML,Crisfield, E,Raczka, B,Schnekenburger, F,Eissenstat, DM,&Smithwick, EAH.(2015).Sensitivity of four ecological models to adjustments in fine root turnover rate.ECOLOGICAL MODELLING,297,107-117.
MLA McCormack, ML,et al."Sensitivity of four ecological models to adjustments in fine root turnover rate".ECOLOGICAL MODELLING 297(2015):107-117.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[McCormack, ML]'s Articles
[Crisfield, E]'s Articles
[Raczka, B]'s Articles
Baidu academic
Similar articles in Baidu academic
[McCormack, ML]'s Articles
[Crisfield, E]'s Articles
[Raczka, B]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[McCormack, ML]'s Articles
[Crisfield, E]'s Articles
[Raczka, B]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.