确定极端气候对热带幼树径向生长的影响:基于清单和树环的估计值比较

IF 2.7 3区 农林科学 Q1 FORESTRY
Viktoria Dietrich , Georgios Skiadaresis , Florian Schnabel , Jean-Michel Leban , Catherine Potvin , Jürgen Bauhus , Julia Annick Schwarz
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引用次数: 0

摘要

热带森林复原力的丧失与气候变异性的增加和相关干旱有关,但人们对热带树木对极端气候的反应仍然知之甚少。这限制了我们在热带地区设计有效森林适应战略的能力。在此,我们分析了利用幼树分析气候变异性和极端气候的潜力,鉴于次生林和植树造林面积不断增加,这开辟了新的途径。我们利用在巴拿马萨丁利亚树木多样性实验中种植的五种本地树种的 139 棵 16 年树龄树木的年直径测量结果和茎盘,比较了三种确定年径向生长的方法。通过采用清单测量、目测茎盘分析和木材密度测量,计算出径向生长序列,以比较潮湿和干燥极端事件期间的相对生长情况,并计算连续气候-生长相关性。我们的结果表明,从木材密度剖面得出的年径向生长数据最适合用于气候-生长关系,因为它们可以捕捉到幼树对季节性气候变量的高种内变异中的共同生长信号。通过目测和清查获得的年径向生长数据仍然有助于量化极端干旱时的生长反应。在确定年径向生长量的方法中,Cedrela odorata 的相似度最高,气候与生长量的关系也最密切。因此,热带人工林中种植的幼树茎盘可作为树生态分析的合适来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Identifying the impact of climate extremes on radial growth in young tropical trees: A comparison of inventory and tree-ring based estimates

The loss of tropical forest resilience has been linked to increased climate variability and associated droughts, but the response of tropical trees to climate extremes remains poorly understood. This limits our ability to design effective forest adaptation strategies in the tropics. Here we analyse the potential of using young trees to analyse climate variability and extremes, which opens new avenues given the increasing area of secondary forests and tree plantations. We used annual tree diameter measurements and stem discs from 139 16-year-old trees belonging to five native species planted in the Sardinilla tree diversity experiment in Panama and compared three methods to determine annual radial growth. Employing inventory measurements, visual stem disc analysis, and wood density measurements, series of radial growth were calculated to compare relative growth during wet and dry extreme events, and to compute continuous climate-growth correlations. Our results show that annual radial growth data derived from wood density profiles are best suited for climate-growth relationships, as they could capture a common growth signal within the high intraspecific variability of young trees to seasonal climatic variables. Annual radial growth data derived visually and from inventories are still useful for quantifying growth responses during extreme drought. The highest similarity among methods to determine annual radial growth, combined with the strongest climate-growth relationships, were found for Cedrela odorata, a species that shows a pronounced decrease in water use and cambial dormancy during the dry season. Stem discs from young trees planted in tropical forest plantations may thus offer a suitable source for dendroecological analyses.

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来源期刊
Dendrochronologia
Dendrochronologia FORESTRY-GEOGRAPHY, PHYSICAL
CiteScore
5.50
自引率
13.30%
发文量
82
审稿时长
22.8 weeks
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.
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