气候变化领域集成服务门户(CCPortal): Intraspecific variation in functional wood anatomy of tropical trees caused by effects of forest edge

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DOI	10.1016/j.foreco.2020.118305
	Intraspecific variation in functional wood anatomy of tropical trees caused by effects of forest edge
	Silva da Costa W.; Da Cunha M.; José F. Pena Rodrigues P.; de Andrade Iguatemy M.; Valladares F.; Franca Barros C.
发表日期	2020
ISSN	0378-1127
卷号	473
英文摘要	Forest edge effects promote striking microclimatic shifts that result in greater light exposure, increased air temperature and evapotranspiration rates, and reduced soil moisture can alter stem hydraulic conductivity. These environmental conditions greatly increase the risk of emboli in xylem, which can disrupt or even cease water transport. We investigated tropical tree species in contrasting sites to understand the influence that edge effects have on wood functional anatomy. We compared wood anatomical traits between trees of forest edge and forest interior sites. The species exhibited two types of xylem arrangements based on the distribution of parenchyma cells: Pseudopiptadenia inaequalis and Copaifera lucens, with paratracheal axial parenchyma (PP), and Eugenia excelsa and Erythroxylum cuspidifolium, with predominant apotracheal axial parenchyma (AP). Tree species with PP xylem possessed shorter and wider vessel elements and lower ray and vessel frequencies, while species with AP xylem possessed longer and narrower vessel elements and higher ray and vessel frequencies. Regardless of the axial parenchyma arrangement, all four species had a greater percentage of axial parenchyma at the edge sites. The different xylem arrangements showed distinct responses to the edge effect in vessel frequency. The tropical tree species studied here shift to a greater abundance of axial parenchyma when subjected to effects of forest edge, probably to ensure safe water transport. This behavior, in the face of environmental stresses, is a plastic response, and likely due to functional versatility of parenchyma cells. The patterns of vessel frequency for PP and AP suggest that these xylem arrangements can be considered functional groups since the species in each group share similar traits and have similar strategies for conducting and maintaining water flow. © 2020 Elsevier B.V.
关键词	Flow of water Soil moisture Tropics Environmental conditions Environmental stress Forest interiors Intraspecific variation Parenchyma cells Plastic response Tropical tree species Water transport Forestry air temperature anatomy environmental stress evapotranspiration forest edge intraspecific variation stem wood xylem Edges Forestry Parenchyma Trees Tropics Water Ways Wood Structure Xylem Copaifera Erythroxylum
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/132701
推荐引用方式 GB/T 7714	Silva da Costa W.,Da Cunha M.,José F. Pena Rodrigues P.,et al. Intraspecific variation in functional wood anatomy of tropical trees caused by effects of forest edge[J]. Forest Ecology and Management,2020,473.
APA	Silva da Costa W.,Da Cunha M.,José F. Pena Rodrigues P.,de Andrade Iguatemy M.,Valladares F.,&Franca Barros C..(2020).Intraspecific variation in functional wood anatomy of tropical trees caused by effects of forest edge.,473.
MLA	Silva da Costa W.,et al."Intraspecific variation in functional wood anatomy of tropical trees caused by effects of forest edge".473(2020).