Stem growth of multipurpose tree species: net effect of micrometeorological variability assessed by principal component regression

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY

Acta Amazonica Pub Date : 2022-12-01 DOI:10.1590/1809-4392202103390

Alan Pena de Souza, R. A. Marenco

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引用次数: 2

Abstract

ABSTRACT In a typical year in the central Amazon, there is a mild dry season, but its effect on stem growth of multipurpose forest tree species is not yet well known. This study aimed to determine the individual effect of microclimatic parameters on stem growth after removing the influence of intercorrelation among microclimatic variables. Monthly stem diameter increment was measured in six species (46 trees) from January 2018 to December 2020. Microclimatic variables recorded were irradiance, air temperature, rainfall, and vapor pressure deficit. Principal component regression was used to assess the effect of micrometeorological variability on stem growth. On average, stem growth increased with an increase in rainfall and soil water content, but decreased with rise in maximum temperature and maximum vapor pressure deficit. These findings indicate that, when removing the effect of intercorrelation between microclimatic parameters, vapor pressure deficit may, in fact, affect stem growth. We demonstrate that the reduction in stem growth during the dry season can also be related to an increase in maximum temperature and maximum vapor pressure deficit, and not only to a decline in soil water content.

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多用途树种的茎生长:主成分回归评估微气象变率的净效应

摘要在亚马逊中部的一个典型年份，有一个温和的旱季，但它对多用途森林树种树干生长的影响尚不清楚。本研究旨在消除小气候变量之间相互关联的影响后，确定小气候参数对茎生长的个体影响。从2018年1月到2020年12月，对六个物种（46棵树）的月树干直径增量进行了测量。记录的小气候变量包括辐照度、气温、降雨量和蒸汽压不足。主成分回归用于评估微气象变异对茎生长的影响。平均而言，茎的生长随着降雨量和土壤含水量的增加而增加，但随着最高温度和最大蒸汽压亏空的增加而减少。这些发现表明，当去除小气候参数之间相互关联的影响时，蒸汽压不足实际上可能会影响茎的生长。我们证明，旱季树干生长的减少也可能与最高温度和最大蒸汽压亏空的增加有关，而不仅仅与土壤含水量的下降有关。

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

Acta Amazonica PLANT SCIENCESECOLOGYZOO-ECOLOGY

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

22 weeks

期刊介绍： Acta Amzonica is a multidisciplinary, peer-reviewed, open access, free-of-charge scientific journal for research in and about the Amazon region, published since 1971 by the Instituto Nacional de Pesquisas da Amazônia - INPA, in Brazil. The journal publishes quarterly issues containing articles and short communications in English across a broad range of disciplines, including Agronomy and Forestry, Animal Sciences and Fisheries, Biodiversity and Conservation, Biotechnology, Chemistry and Pharmacology, Environmental Sciences, Food Sciences, Geosciences, Health Sciences, Human and Social Sciences, and Materials Technology.