Above-ground biomass accumulation in Cerradão managed by the mass ratio

IF 1.5 4区农林科学 Q2 FORESTRY

New Zealand Journal of Forestry Science Pub Date : 2023-08-20 DOI:10.33494/nzjfs532023x232x

Matheus Santos Martins, Eder Pereira Miguel, José Roberto Rodrigues Pinto, Milton Serpa de Meira Junior, Fernanda Coelho de Souza, H. Souza

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引用次数: 0

Abstract

Background: Forests have a huge potential to mitigate global warming through CO2 accumulation in their living biomass. Thus, understanding the functioning of these ecosystems is crucial for revealing factors that drive biomass accumulation. Functional diversity helps us understand ecosystem services, including biomass accumulation. Within this context, this work aimed to investigate the role of functional diversity in biomass accumulation for woody vegetation of the Cerradão. Methods: We estimated above-ground biomass (AGB) of 50 Cerradão stands in Brazil and measured five different functional traits associated with tree species’ survival and growth. For each stand, we calculated five community-weighted means (CWMs), based on each functional trait, and three functional diversity metrics. We specifically explored the relationship between CWMs describing functional diversity metrics and AGB. After that, exponential regressions were adjusted, using the variables that presented significant correlation as independent variables and AGB as a dependent variable. Regressions with more than one independent variable were fitted in a way that avoided collinearity. Based on the strongest correlation coefficient (r) and the lowest Akaike value (AIC), we chose the best regression to explain the majority of the variance in AGB. Results: Our results showed the role of function in determining AGB. In particular, bivariate correlations show that four CWM functional traits and two functional diversity metrics are significantly associated with AGB production, with CWM showing AGB estimation variables. However, multiple regression analyses show that maximum height is the only trait significantly associated with AGB and it alone provides the best model fit. Conclusions: The accumulation of AGB in Cerradão is explained by the mass ratio theory, and this ecosystem services is directly related to the presence and abundance of species with greater potential tree height (Htmax).

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Cerradão的地上生物量积累由质量比管理

背景：森林通过其生物量中的二氧化碳积累，具有缓解全球变暖的巨大潜力。因此，了解这些生态系统的功能对于揭示驱动生物量积累的因素至关重要。功能多样性有助于我们了解生态系统服务，包括生物量积累。在这种背景下，这项工作旨在研究功能多样性在塞拉多木本植被生物量积累中的作用。方法：我们估计了巴西50个塞拉多林分的地上生物量（AGB），并测量了与树种生存和生长相关的五种不同功能性状。对于每个林分，我们根据每个功能性状和三个功能多样性指标计算了五个群落加权平均值（CWM）。我们特别探讨了描述功能多样性度量的CWM与AGB之间的关系。之后，使用呈现显著相关性的变量作为自变量，AGB作为因变量，对指数回归进行调整。具有一个以上自变量的回归以避免共线的方式拟合。基于最强的相关系数（r）和最低的Akaike值（AIC），我们选择了最好的回归来解释AGB中的大部分方差。特别是，双变量相关性表明，四个CWM功能性状和两个功能多样性指标与AGB产生显著相关，其中CWM显示AGB估计变量。然而，多元回归分析表明，最大身高是唯一与AGB显著相关的特征，并且它单独提供了最佳的模型拟合。结论：AGB在Cerradão的积累可以用质量比理论来解释，这种生态系统服务与潜在树高（Htmax）较大的物种的存在和丰度直接相关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Zealand Journal of Forestry Science FORESTRY-

CiteScore

2.20

自引率

13.30%

发文量

审稿时长

39 weeks

期刊介绍： The New Zealand Journal of Forestry Science is an international journal covering the breadth of forestry science. Planted forests are a particular focus but manuscripts on a wide range of forestry topics will also be considered. The journal''s scope covers forestry species, which are those capable of reaching at least five metres in height at maturity in the place they are located, but not grown or managed primarily for fruit or nut production.