Hymenaea stignocarpa Mart. ex Hayne growth–climate relationships are regulated by soil water saturation in Cerrado-Pantanal ecotone

IF 2.7 3区 农林科学 Q1 FORESTRY Dendrochronologia Pub Date : 2023-10-01 DOI:10.1016/j.dendro.2023.126130
José Guilherme Roquette , Francisco de Almeida Lobo , George Louis Vourlitis , Fidel Alejandro Roig , Carmen Eugenia Rodríguez Ortíz , Nelson Mario Banga , Leif Armando Portal-Cahuana , Mario Tomazello-Filho
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Abstract

The expected intensification of the dry season, and concentration of rainfall during the wet season, can disrupt tree growth and regional biodiversity in the Cerrado-Pantanal transition zone. Thus, this study aims to assess the climatic responses of Hymenaea stigonocarpa tree growth, a common tree species in this region. Incremental cores were collected at breast height (ca. 1.3 m) from 67 trees to construct a dendrochronological series to correlate annual growth with local meteorological variables and large-scale atmospheric circulation indices from the Pacific and Atlantic Oceans. Significant positive correlations were observed between tree growth and the Pacific Ocean indices. Maximum and average air temperatures of the previous dry season negatively influenced growth, while precipitation at the beginning of the growth season (November) positively influenced growth. Tree growth was not correlated with temperature or rainfall during the wet season. However, at the end of the wet season (February), tree growth was negatively correlated with air temperature and positively correlated with rainfall, but the relationship shifted in the next month (March) suggesting that soil water saturation reduced growth. Our results indicate that dendrochronological studies of H. stignocarpa are useful for assessing the environmental change on the Cerrado-Pantanal ecotone. Furthermore, variations in water availability and temperature associated with changes in large-scale oceanic circulation and local meteorological conditions will impact the growth dynamics of this important Cerrado tree species.

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刺膜虫。塞拉多-潘塔纳尔交错带土壤水分饱和度调节生长-气候关系
预计旱季的加剧和雨季的降雨集中可能会破坏塞拉多-潘塔纳尔过渡区的树木生长和区域生物多样性。因此,本研究旨在评估该地区常见树种——石竹的气候响应。从67棵树的乳高(约1.3米)处收集增量岩芯,构建一个树状时序序列,将年生长与太平洋和大西洋的当地气象变量和大规模大气环流指数相关联。树木生长与太平洋指数之间存在显著的正相关性。前一个旱季的最高和平均气温对生长产生了负面影响,而生长季(11月)开始时的降水对生长产生积极影响。在雨季,树木生长与温度或降雨量无关。然而,在雨季结束时(2月),树木生长与气温呈负相关,与降雨量呈正相关,但在下个月(3月),这种关系发生了变化,表明土壤水分饱和度降低了生长。我们的研究结果表明,对stignocarpa的树木年代学研究有助于评估Cerrado-Pantanal交错带的环境变化。此外,与大规模海洋环流和当地气象条件变化相关的水资源可用性和温度变化将影响这一重要塞拉多树种的生长动态。
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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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