Sustainability of the endangered species Maesa japonica and Daphne jejudoensis in Gotjawal forest, Jeju Island

IF 2.5 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION
Uhram Song , SeokHyeon Oh , Byoung Woo Kim , SangEun Kwak , Euijoo Kim , Younghan You , Hojun Rim
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引用次数: 0

Abstract

In Jeju’s lava stony forests (Gotjawal), climate change is shifting the canopy composition from deciduous to evergreen broadleaved species, impacting understory plants and threatening bodiversity. This study investigated the adaptability of two canopy-dependent rare species, Maesa japonica and Daphne jejudoensis, to these environmental changes. Greenhouse experiments showed that M. japonica grew 2.56 times faster in brighter light conditions (90 % shading) than its natural habitat (97 %), and D. jejudoensis grew 1.55 times faster under 50 % shading compared to 75 %. This suggests both species favor environments with less canopy cover. Indoor trials revealed M. japonica maintained adaptability under low light (97 %–99 % shading) but exhibited reduced growth, while D. jejudoensis struggled in low light conditions. Despite both species having adequate photosynthetic rates in current low-light settings, they showed reduced rates in light conditions projected under an evergreen-dominant canopy. This shift to evergreen-dominant canopy threatens the sustainability of these and other rare plants that rely on the increased light available in deciduous forests during winter and spring. Such changes are expected to occur in many temperate forests in the future, and this study serves as a precursor to these changes. Conservation strategies are thus essential to manage Gotjawal’s biodiversity amid climate-induced canopy changes.
济州岛Gotjawal森林濒危物种Maesa japonica和Daphne jejudoensis的可持续性
在济州的熔岩石林(Gotjawal),气候变化正在将树冠组成从落叶物种转变为常绿阔叶物种,影响了下层植物并威胁到生物多样性。本研究研究了两种依赖于冠层的珍稀物种Maesa japonica和Daphne jejudoensis对这些环境变化的适应性。温室试验结果表明,在90%遮光条件下,粳稻的生长速度是自然生境(97%)的2.56倍,空枣在50%遮光条件下的生长速度是75%遮光条件下的1.55倍。这表明这两个物种都喜欢树冠覆盖较少的环境。室内试验结果表明,粳稻在低光照(97% ~ 99%遮光)条件下仍能保持适应性,但生长速度下降,而空枣则在低光照条件下挣扎。尽管这两个物种在当前的低光照环境下都有足够的光合速率,但在常绿植物为主的树冠下,它们的光合速率却降低了。这种向常绿植物为主的树冠的转变威胁着这些和其他稀有植物的可持续性,这些植物依赖于冬季和春季落叶林中增加的光照。这种变化预计将来会在许多温带森林中发生,而这项研究是这些变化的前兆。因此,在气候引起的冠层变化中,保护策略对于管理Gotjawal的生物多样性至关重要。
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来源期刊
Journal for Nature Conservation
Journal for Nature Conservation 环境科学-生态学
CiteScore
3.70
自引率
5.00%
发文量
151
审稿时长
7.9 weeks
期刊介绍: The Journal for Nature Conservation addresses concepts, methods and techniques for nature conservation. This international and interdisciplinary journal encourages collaboration between scientists and practitioners, including the integration of biodiversity issues with social and economic concepts. Therefore, conceptual, technical and methodological papers, as well as reviews, research papers, and short communications are welcomed from a wide range of disciplines, including theoretical ecology, landscape ecology, restoration ecology, ecological modelling, and others, provided that there is a clear connection and immediate relevance to nature conservation. Manuscripts without any immediate conservation context, such as inventories, distribution modelling, genetic studies, animal behaviour, plant physiology, will not be considered for this journal; though such data may be useful for conservationists and managers in the future, this is outside of the current scope of the journal.
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