非洲南部赞比亚热带干燥森林的地下结构和木本植物高度的决定因素

IF 1 4区 环境科学与生态学 Q4 ECOLOGY
E. Chidumayo
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引用次数: 0

摘要

以赞比亚热带干燥森林(TDF)为研究对象,对27个树种(包括播种植物)256棵出土幼树和小树的根系指标和株高进行了分析,并对地下结构进行了描述,对影响其生长的因素进行了评价。建立了模型来(i)从不完全挖掘中估计主根深度(ii)从近端直径数据中估计粗侧根生物量。所研究的大多数物种生长缓慢,16岁时的中位高度<200厘米。根的发育顺序为直根伸长→粗壮→侧根粗壮。浅土层灌木主根较短,木材密度较低。株龄对茎高变异的解释<10%。根变量解释了茎高的大部分变异。需要更多的研究来提高我们对南部非洲tdf地下结构如何影响树干生长和树木招募的认识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Belowground structure and determinants of woody plant height at a tropical dry forest site in Zambia, southern Africa
Root metrics and plant height for 256 excavated saplings and small trees of 27 species, including sown plants, were used to describe belowground structure and assess factors that influence shoot growth in a tropical dry forest (TDF) in Zambia. Models were developed to (i) estimate taproot depth from incomplete excavations and (ii) coarse lateral root biomass from proximal diameter data. The majority of the species studied are slow-growing and had a median height of <200 cm at the age of 16 years. Root development advanced sequentially from taproot elongation to thickening to coarse lateral root development. Shrubs in shallow soil had short taproots with a lower wood density. Plant age explained <10% of the variance in shoot height. Root variables explained the majority of the variance in shoot height. More research is needed to improve our knowledge about how belowground structures influence shoot growth and tree recruitment in TDFs of southern Africa.
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来源期刊
Journal of Tropical Ecology
Journal of Tropical Ecology 环境科学-生态学
CiteScore
2.10
自引率
0.00%
发文量
44
审稿时长
18-36 weeks
期刊介绍: Journal of Tropical Ecology aims to address topics of general relevance and significance to tropical ecology. This includes sub-disciplines of ecology, such as conservation biology, evolutionary ecology, marine ecology, microbial ecology, molecular ecology, quantitative ecology, etc. Studies in the field of tropical medicine, specifically where it involves ecological surroundings (e.g., zoonotic or vector-borne disease ecology), are also suitable. We also welcome methods papers, provided that the techniques are well-described and are of broad general utility. Please keep in mind that studies focused on specific geographic regions or on particular taxa will be better suited to more specialist journals. In order to help the editors make their decision, in your cover letter please address the specific hypothesis your study addresses, and how the results will interest the broad field of tropical ecology. While we will consider purely descriptive studies of outstanding general interest, the case for them should be made in the cover letter.
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