印度东北部亚热带湿润森林树木的物候多样性

IF 1 4区 环境科学与生态学 Q4 ECOLOGY Journal of Tropical Ecology Pub Date : 2023-07-04 DOI:10.1017/S0266467423000184
N. L. Devi, F. Brearley, S. Tripathi
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引用次数: 0

摘要

摘要分析热带树木的酚类多样性为检测气候变化影响和制定森林管理方案提供了一个潜在的工具。在这项研究中,对印度东北部潮湿亚热带丘陵森林中28种优势树种的叶酚活性进行了为期2年的研究,并与功能性状(即单位面积叶质量(LMA)和木材密度(WD))有关。落叶高峰期出现在凉爽干燥期(11月至1月),前季风期(2月至3月)叶片齐平达到峰值,但不同物种之间存在差异,这受其酚学策略的影响,即常绿、换叶或落叶(<4个月无叶)。光周期和最低温度是与表型活动相关性最强的环境因素,两个表型的种内同步指数均为0.81。落叶物种的LMA比常绿物种少,而WD没有差异。LMA与蜕膜长度以及叶片齐平和落叶的时间呈负相关,表明LMA在影响该森林的酚类模式方面可能比WD更重要。研究表明,热带树木的酚类多样性与环境变量的变化有关,对气候变化下的森林管理具有启示意义。进一步的研究将有助于了解树木对气候因素的酚学反应及其未来的潜在变化。
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Phenological diversity among sub-tropical moist forest trees of north-eastern India
Abstract Analysing phenological diversity of tropical trees provides a potential tool to detect climate change effects and devise forest management options. In this study, the leaf phenological activity of 28 dominant tree species in a moist sub-tropical hill forest of north-eastern India was examined for a period of 2 years and related to functional traits (i.e. leaf mass per area (LMA) and wood density (WD)). The peak phase of leaf fall occurred in the cool dry period (November to January) with leaf flush peaking in the pre-monsoon period (February to March), but variation was found between species as influenced by their phenological strategy, i.e. evergreen, leaf-exchanging or deciduous (<4 months leafless). Photoperiod and minimum temperature were the environmental factors most strongly correlated with phenological activity, and the synchrony index within species for both phenophases was 0.81. LMA was less in the deciduous species compared with the evergreen species, whereas WD did not differ. LMA was negatively correlated with the length of deciduousness as well as timing of leaf flush and fall indicating that LMA may be more important than WD in influencing phenological patterns in this forest. The study revealed that the phenological diversity of tropical trees is related to changes in environmental variables and has implication for forest management under changing climate. Further study will help in understanding the phenological response of trees to climatic factors and their potential future changes.
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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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