Rafael P. Albuquerque , Arno F.N. Brandes , Leonardo B. Nascimento , Jerônimo B.B. Sansevero , Andrea Sánchez-Tapia , Warlen S. Costa , Claudia F. Barros
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引用次数: 0
摘要
耐火物种在退化景观的自然再生过程中可能具有重要的生态作用。多晶Moquiniastrum polymorphim是一种粗糙且耐火的物种,分布在巴西大西洋森林的火灾干扰区。评估一个物种对火灾和气候的生长敏感性有助于了解其复杂的演替过程。在本研究中,我们使用树木年表来描述大西洋森林(Poço das Anta生物保护区)火灾干扰区中多形分枝杆菌的径向生长轨迹,检测火灾后对物种生长的影响,并调查气候生长关系。我们描述了该物种的长期生长趋势,它在最初几年增加,并在接下来的几年保持不变。雨季结束时,年表与降水呈正相关,与气温呈负相关。我们的研究结果表明,M.polymorphium在火灾事件后并没有减少其生长。当从时代的角度观察时,火灾甚至可以对物种的生长产生积极影响。这些生长结果表明了物种的耐火性,这可能会在森林火灾后提供有弹性的树木覆盖,并使受干扰的大西洋森林环境打破草火循环。这种抵抗力可能与大西洋森林火灾多发地区物种的机会主义特征有直接关系。然而,我们强调了该物种在大西洋森林被烧毁地点的自然再生中发挥的关键作用。
Growth analysis highlights the fire-resistance of a ruderal species in the Atlantic Forest
Fire-resistant species may have an essential ecological role in the natural regeneration process of degraded landscapes. Moquiniastrum polymorphum is a ruderal and fire-resistant species that occupies fire-disturbed areas in Brazilian Atlantic Forest. Evaluating a species’ growth sensitivity to fire and climate can help understand its complex successional process. In the present study, we used dendrochronology to describe the radial growth trajectories of M. polymorphum in a fire-disturbed area in the Atlantic Forest (Poço das Anta Biological Reserve), detect post-fire effects on the species’ growth, and investigate climate-growth relationships. We described the long-term growth trend of the species, it increased in the first years and was constant in the following years. The chronology was positively correlated with precipitation and negatively correlated with temperature at the end of the rainy season. Our results reveal that M. polymorphum did not reduce its growth after fire events. When observing through an epoch perspective, fire can even be positive to the species growth. These growth results indicated species fire resistance, which likely provides a resilient tree cover after forest fires and allows disturbed Atlantic Forest environments to break grass-fire cycles. This resistance may have a direct relationship with the opportunistic characteristic of the species in fire-prone areas in the Atlantic Forest. However, we highlight the critical role this species plays in the natural regeneration of burned sites in the Atlantic Forest.
期刊介绍:
Dendrochronologia is a peer-reviewed international scholarly journal that presents high-quality research related to growth rings of woody plants, i.e., trees and shrubs, and the application of tree-ring studies.
The areas covered by the journal include, but are not limited to:
Archaeology
Botany
Climatology
Ecology
Forestry
Geology
Hydrology
Original research articles, reviews, communications, technical notes and personal notes are considered for publication.