印度西高止山脉低洼地双子叶树森林树木群落的物候趋势及相关气候驱动因素。

IF 3 3区 地球科学 Q2 BIOPHYSICS International Journal of Biometeorology Pub Date : 2024-10-21 DOI:10.1007/s00484-024-02802-6
Devika Menon, Debabrata Behera, Narayanan Ayyappan
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引用次数: 0

摘要

了解热带森林植物群落的物候反应对于确定生态系统动态中由气候引起的变化至关重要。监测自然栖息地中不同物种的物候为保护物种和森林提供了具有成本效益的见解。我们研究了印度西高止山脉低地常绿双子叶植物森林中的树木物候。从 2021 年 4 月到 2023 年 9 月,我们对代表 95 个物种的约 719 个树木个体的无性和生殖物候进行了监测。循环统计检测了物候事件的季节性,广义线性混合模型(GLMM)确定了气候变量对树木群落物候反应的影响。我们还评估了研究期间物候活动和强度的变化情况。我们的结果表明,冲叶和开花在旱季达到高峰,在两种主要的双子叶植物中观察到大量开花。果实产量在季风前达到高峰。我们还观察到不同物种组(森林地层、有性系统和种子大小)在无性繁殖和生殖表观动力学方面的多样性。叶片潮红与最大相对湿度呈正相关,与最高温度和降雨日数呈负相关。开花与最大相对湿度、降雨日数和最高温度呈负相关,但与最低温度呈正相关。结果期与最高温度呈正相关,与降雨日数呈负相关。这些详细的物候信息提供了有关资源可用性的重要知识,让人们深入了解气候和季节变化如何影响植物的生长周期,从而有助于脆弱林区的植树造林和生物多样性保护战略。
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Phenological trends and associated climate drivers of a tree community in lowland dipterocarp forest, Western Ghats, India.

Understanding phenological responses of tropical forest plant communities is crucial for identifying climate-induced changes in ecosystem dynamics. Monitoring phenology across diverse species in natural habitats provides cost-effective insights for conserving both species and forests. We studied tree phenology in a lowland evergreen dipterocarp forest in the Western Ghats, India. About 719 tree individuals representing 95 species were monitored for their vegetative and reproductive phenology from April 2021 to September 2023. Circular statistics detected seasonality in phenological events and Generalized Linear Mixed Modelling (GLMM) identified influence of climate variables on the phenological responses of the tree community. We also assessed how the activity and intensity of phenophases vary over the study period. Our results showed that leaf flushing and flowering peaked during the dry season, with mass flowering observed in two dominant dipterocarps. Fruit production peaked before the monsoon. We also observed diversity in vegetative and reproductive phenodynamics across species groups (forest strata, sexual system, and seed size). Leaf flushing was positively correlated with maximum relative humidity and negatively correlated with maximum temperature and the number of rainy days. Flowering had negative correlations with maximum relative humidity, rainfall days, and maximum temperature but showed a positive correlation with minimum temperature. Fruiting was positively correlated with maximum temperature and negatively correlated with rainy days. This detailed phenological information provides critical knowledge on resource availability and insights into how climate and seasonal changes affect plant growth cycles thereby aiding reforestation and biodiversity conservation strategies in vulnerable forest areas.

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来源期刊
CiteScore
6.40
自引率
9.40%
发文量
183
审稿时长
1 months
期刊介绍: The Journal publishes original research papers, review articles and short communications on studies examining the interactions between living organisms and factors of the natural and artificial atmospheric environment. Living organisms extend from single cell organisms, to plants and animals, including humans. The atmospheric environment includes climate and weather, electromagnetic radiation, and chemical and biological pollutants. The journal embraces basic and applied research and practical aspects such as living conditions, agriculture, forestry, and health. The journal is published for the International Society of Biometeorology, and most membership categories include a subscription to the Journal.
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