气候变化领域集成服务门户(CCPortal): Competition and facilitation co-regulate the spatial patterns of boreal tree species in Kanas of Xinjiang, northwest China

CCPortal

DOI	10.1016/j.foreco.2020.118167
	Competition and facilitation co-regulate the spatial patterns of boreal tree species in Kanas of Xinjiang, northwest China
	Liu P.; Wang W.; Bai Z.; Guo Z.; Ren W.; Huang J.; Xu Y.; Yao J.; Ding Y.; Zang R.
发表日期	2020
ISSN	0378-1127
卷号	467
英文摘要	Competition and facilitation are the primary mechanisms structuring communities and driving spatial distribution patterns of trees. However, we still know relatively little about the underlying effects of these two processes on natural forest ecosystems and this is particularly true in boreal forest ecosystems. Our lack of understanding regarding the factors regulating spatial patterns of boreal forest ecosystems is important given their role in carbon sequestration and timber products. Using data from a 12-ha boreal forest dynamic plot in the Kanas Nature Reserve of Northwest China, we assessed the population distribution and diameter at breast height (DBH) structure, as well as intra- and interspecific interactions, of the four most abundant tree species (Larix sibirica, Picea obovata, Pinus sibirica, and Betula pendula). Our results indicate that the spatial distribution patterns of these species were aggregated at small spatial scales because of dispersal limitation, and that the degree of aggregation decreased with increasing spatial scale. Aggregation was the highest for the less common species (i.e., B. pendula pendula). Saplings (1 cm ≤ DBH < 5 cm) and juveniles (5 cm ≤ DBH < 15 cm) were more aggregated than larger individuals (DBH ≥ 15 cm). Only P. obovata adults (DBH ≥ 15 cm) showed a regular (i.e., hyperdispersed) distribution because of the intense intraspecific competition at small scales (i.e., <5 m). Intraspecific interactions between individuals were either positive or not significant. In terms of interspecific competition, there were significant negative associations among large (DBH ≥ 15 cm) and small adults (5 cm ≤ DBH < 15 cm) for the two shade tolerant species (P. obovata and P. sibirica). In contrast, we observed positive interspecific interactions between individuals of different DBH classes and different shade tolerance species. Thus, most of the intra- and interspecific interactions showed positive or no significant correlations. Negative associations were generally less common than positive associations both within and between species. Our results show that competition and facilitation simultaneously influence the spatial patterns of plants in this community. Moreover, positive interactions between tree individuals in this temperate region are likely to be more common than competitions for survival and growth of tree stems. © 2020 Elsevier B.V.
关键词	Ecosystems Population distribution Population statistics Boreal forest ecosystems Diameter-at-breast heights Inter-specific competitions Interspecific interactions Intra-specific interactions Intraspecific competition Natural forest ecosystems Spatial distribution patterns Forestry boreal forest carbon sequestration community structure competition (ecology)deciduous tree dispersal facilitation forest dynamics forest ecosystem intrasexual interaction population distribution spatial distribution timber Competition DBH Distribution Ecosystems Forestry Organizations Patterns Trees China Kanas Nature Reserve Xinjiang Uygur Betula pendula Larix sibirica Picea obovata Pinus sibirica
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132800
推荐引用方式 GB/T 7714	Liu P.,Wang W.,Bai Z.,et al. Competition and facilitation co-regulate the spatial patterns of boreal tree species in Kanas of Xinjiang, northwest China[J]. Forest Ecology and Management,2020,467.
APA	Liu P..,Wang W..,Bai Z..,Guo Z..,Ren W..,...&Zang R..(2020).Competition and facilitation co-regulate the spatial patterns of boreal tree species in Kanas of Xinjiang, northwest China.,467.
MLA	Liu P.,et al."Competition and facilitation co-regulate the spatial patterns of boreal tree species in Kanas of Xinjiang, northwest China".467(2020).