globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2014.07.028
Scopus记录号: 2-s2.0-84906760782
论文题名:
Differences between competition kernels and traditional size-ratio based competition indices used in forest ecology
作者: Pommerening A.; Maleki K.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2014
卷: 331
起始页码: 135
结束页码: 143
语种: 英语
英文关键词: Ecological field theory ; Individual-based modelling ; Potential-modifier approach ; Spatial plant interaction ; Stem diameter increment ; Zone of influence (ZOI)
Scopus关键词: Ecology ; Ecological field theories ; Individual-based modelling ; Plant interactions ; Potential-modifier approach ; Stem diameter ; Zone of influences ; Forestry ; data set ; ecological theory ; forest ecosystem ; index method ; individual-based model ; interspecific competition ; size structure ; tree ; Ecology ; Forestry ; Trees ; Europe ; North America
英文摘要: Both traditional competition indices and competition kernels are used in many studies to quantify competition between plants for resources. Yet it is not fully clear what the differences between these two concepts really are.For characterising the two approaches we selected two fundamental types of competition indices based on distance weighted size ratios, an additional competition index without distance weighting and developed similar competition kernels. In contrast to the latter approach, competition indices require individual influence zones that for example can be derived from tree crown-radius measurements. We applied these competition measures to two spatio-temporal forest datasets in Europe and one in North America. Stem diameter increment served as observed response variable.The results of both methods indicated similar performance, however, the use of competition kernels produced slightly better results with only one exception out of six computer experiments.Although the performance of both competition measures is not too different, competition kernels are based on more solid mathematical and ecological grounds. Particularly the question of defining the local neighbourhood of a given tree seems to be better handled by competition kernels. Consequently, applications of this method are likely to increase. The trade-off of the use of competition kernels, however, is the need for more sophisticated spatial regression routines that researchers are required to program. Finally, a tabulated summary of differences between competition indices and competition kernels is included. © 2014 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65758
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: Swedish University of Agricultural Sciences SLU, Faculty of Forest Sciences, Department of Forest Resource Management, Skogsmarksgränd, SE-901 83 Umeå, Sweden; Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Department of Forest Management, Kreutzwaldi 5, Tartu 51014, Estonia

Recommended Citation:
Pommerening A.,Maleki K.. Differences between competition kernels and traditional size-ratio based competition indices used in forest ecology[J]. Forest Ecology and Management,2014-01-01,331
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Pommerening A.]'s Articles
[Maleki K.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Pommerening A.]'s Articles
[Maleki K.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Pommerening A.]‘s Articles
[Maleki K.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

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