生态系统类型影响亚马逊树种对茎枝木材的投资方式

IF 4.6 1区 环境科学与生态学 Q1 ECOLOGY Functional Ecology Pub Date : 2024-05-08 DOI:10.1111/1365-2435.14572
Gisele Biem Mori, Jochen Schöngart, Juliana Schietti, J. Ethan Householder, Michelle Robin, Florian Wittmann, Lourens Poorter, Maria Teresa Fernandez Piedade
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摘要

木质密度(WD)是一个关键的功能特征,因为它在树木性能和森林生物量计算中具有重要意义。然而,人们对树木不同木质部分之间木质密度的差异、这种差异在不同生态系统中的表现以及这种差异对森林碳储量估算的影响仍然知之甚少,尤其是对亚马逊等多样化热带森林而言。我们收集了119个树种的茎干和枝条木材密度数据集,这些树种分布在土壤营养和洪水差异很大的三种不同的亚马逊生态系统类型中:无洪水森林(Terra Firme)、白水洪泛平原森林(Várzea)和黑水洪泛平原森林(Igapó),以研究(i)茎干和枝条木材密度在不同生态系统中的差异,(ii)茎干和枝条木材密度之间的关系以及这些关系在不同生态系统中的差异。不同生态系统的木材密度差异很大。与 Terra firme 相比,Várzea 树种的平均茎木密度较低,而与其他生态系统相比,Igapó 树种的平均枝木密度较高。虽然 Terra firme 和 Igapó之间的平均木材密度值不同,但树枝和茎干的木材密度呈正相关(R2adj = 0.47),各生态系统之间的增加率相似。对于任何给定的树枝密度,洪泛平原环境中的茎干密度往往较低,而Terra firme环境中的茎干密度则较高,这是树木内部木材密度变化的生境特异性模式,可能源于茎干和树枝木材在生态差异环境中生长和生存功能的差异。我们的研究结果表明,生态系统对树木如何将资源分配给不同的木质组织有很大的影响,这表明与生态系统限制有关的生态策略存在着鲜明的对比。我们的研究结果表明,更多地考虑树木内部WD的变化以及这些变化在不同生态系统中的变化可能会导致对亚马逊地上生物量更准确的估计。在期刊博客上免费阅读本文的通俗语言摘要。
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Ecosystem type affects how Amazonian tree species invest in stem and twig wood

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来源期刊
Functional Ecology
Functional Ecology 环境科学-生态学
CiteScore
9.00
自引率
1.90%
发文量
243
审稿时长
4 months
期刊介绍: Functional Ecology publishes high-impact papers that enable a mechanistic understanding of ecological pattern and process from the organismic to the ecosystem scale. Because of the multifaceted nature of this challenge, papers can be based on a wide range of approaches. Thus, manuscripts may vary from physiological, genetics, life-history, and behavioural perspectives for organismal studies to community and biogeochemical studies when the goal is to understand ecosystem and larger scale ecological phenomena. We believe that the diverse nature of our journal is a strength, not a weakness, and we are open-minded about the variety of data, research approaches and types of studies that we publish. Certain key areas will continue to be emphasized: studies that integrate genomics with ecology, studies that examine how key aspects of physiology (e.g., stress) impact the ecology of animals and plants, or vice versa, and how evolution shapes interactions among function and ecological traits. Ecology has increasingly moved towards the realization that organismal traits and activities are vital for understanding community dynamics and ecosystem processes, particularly in response to the rapid global changes occurring in earth’s environment, and Functional Ecology aims to publish such integrative papers.
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