DOI: 10.1186/s40663-020-0214-y
论文题名: The importance of grain and cut-off size in shaping tree beta diversity along an elevational gradient in the northwest of Colombia
作者: Martínez-Villa J.A. ; González-Caro S. ; Duque Á.
刊名: Forest Ecosystems
ISSN: 20956355
出版年: 2020
卷: 7, 期: 1 语种: 英语
英文关键词: Andean forests
; Null models
; Sampling effect
; Species pool
; Species sorting
英文摘要: Background: Species turnover (β-diversity) along elevational gradients is one of the most important concepts in plant ecology. However, there is a lack of consensus about the main driving mechanisms of tree β-diversity at local scales in very diverse ecosystems (e.g., Andean mountains), as well as how the sampling effect can alter β-diversity estimations. Recently, it has been hypothesized that patterns of change in β-diversity at local scales along elevational gradients are driven by sampling effects stemming from differences in the size of the species pool rather than by underlying community assembly mechanisms. Thus, we aim to evaluate the relative extent to which sampling effects, such as species pool size, grain size, and tree size cut-off, determine species sorting, and thus, the variability of β-diversity at local scales along elevational gradients in the northwest of Colombia. Results: Using 15 1-ha permanent plots spread out along a 3000 m elevational gradient, we used standardized β-deviation to assess the extent to which either sampling effects or the community assembly mechanisms determine the changes in species composition at local scales. Standardized β-deviation was measured as the difference between the observed and null β-diversity divided by the standard deviation of the null β-diversity. We found that the magnitude of change in local β-deviation along the elevational gradient was significant and dependent on the employed spatial grain size and tree size cut-off. However, β-deviation increased with elevation in all sampling designs, which suggests that underlying community assembly mechanisms play a key role in shaping local β-diversity along the elevational gradient. Conclusions: Our findings suggest that grain size enlargement and the inclusion of trees with small diameters will improve our ability to quantify the extent to which the community assembly mechanisms shape patterns of β-diversity along elevational gradients. Overall, we emphasize the scale-dependent nature of the assessment of β-diversity. Likewise, we call for the need of a new generation of enlarged forest inventory plots along gradients of elevation in tropical forests that include small individuals to improve our understanding about the likely response of diversity and function to global change. © 2020, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158050
Appears in Collections: 气候变化与战略
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作者单位: Departamento de Ciencias Forestales, Universidad Nacional de Colombia sede Medellín, Cra. 65 #59a-110, Medellín, Colombia; Département des Sciences Biologiques, Université du Québec à Montréal, 141, Avenue du Président-Kennedy, Montreal, Canada
Recommended Citation:
Martínez-Villa J.A.,González-Caro S.,Duque Á.. The importance of grain and cut-off size in shaping tree beta diversity along an elevational gradient in the northwest of Colombia[J]. Forest Ecosystems,2020-01-01,7(1)