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Fine root dynamics across pantropical rainforest ecosystems

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Title: Fine root dynamics across pantropical rainforest ecosystems
Authors: Huaraca Huasco, W
Riutta, T
Girardin, CAJ
Hancco Pacha, F
Puma Vilca, BL
Moore, S
Rifai, SW
Del Aguila-Pasquel, J
Araujo Murakami, A
Freitag, R
Morel, AC
Demissie, S
Doughty, CE
Oliveras, I
Galiano Cabrera, DF
Durand Baca, L
Farfan Amezquita, F
Silva Espejo, JE
Da Costa, ACL
Oblitas Mendoza, E
Quesada, CA
Evouna Ondo, F
Edzang Ndong, J
Jeffery, KJ
Mihindou, V
White, LJT
N'ssi Bengone, N
Ibrahim, F
Addo-Danso, SD
Duah-Gyamfi, A
Djaney Djagbletey, G
Owusu-Afriyie, K
Amissah, L
Mbou, AT
Marthews, TR
Metcalfe, DB
Aragao, LEO
Marimon-Junior, BH
Marimon, BS
Majalap, N
Adu-Bredu, S
Abernethy, KA
Silman, M
Ewers, RM
Meir, P
Malhi, Y
Item Type: Journal Article
Abstract: Fine roots constitute a significant component of the net primary productivity (NPP) of forest ecosystems but are much less studied than aboveground NPP. Comparisons across sites and regions are also hampered by inconsistent methodologies, especially in tropical areas. Here, we present a novel dataset of fine root biomass, productivity, residence time, and allocation in tropical old-growth rainforest sites worldwide, measured using consistent methods, and examine how these variables are related to consistently determined soil and climatic characteristics. Our pantropical dataset spans intensive monitoring plots in lowland (wet, semi-deciduous, and deciduous) and montane tropical forests in South America, Africa, and Southeast Asia (n = 47). Large spatial variation in fine root dynamics was observed across montane and lowland forest types. In lowland forests, we found a strong positive linear relationship between fine root productivity and sand content, this relationship was even stronger when we considered the fractional allocation of total NPP to fine roots, demonstrating that understanding allocation adds explanatory power to understanding fine root productivity and total NPP. Fine root residence time was a function of multiple factors: soil sand content, soil pH, and maximum water deficit, with longest residence times in acidic, sandy, and water-stressed soils. In tropical montane forests, on the other hand, a different set of relationships prevailed, highlighting the very different nature of montane and lowland forest biomes. Root productivity was a strong positive linear function of mean annual temperature, root residence time was a strong positive function of soil nitrogen content in montane forests, and lastly decreasing soil P content increased allocation of productivity to fine roots. In contrast to the lowlands, environmental conditions were a better predictor for fine root productivity than for fractional allocation of total NPP to fine roots, suggesting that root productivity is a particularly strong driver of NPP allocation in tropical mountain regions.
Issue Date: 31-May-2021
Date of Acceptance: 12-Mar-2021
URI: http://hdl.handle.net/10044/1/92064
DOI: 10.1111/gcb.15677
ISSN: 1354-1013
Publisher: Wiley
Start Page: 3657
End Page: 3680
Journal / Book Title: Global Change Biology
Volume: 27
Issue: 15
Copyright Statement: © 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Rainforest Research Sdn Bhd
Funder's Grant Number: LBEE_P34395
Keywords: Science & Technology
Life Sciences & Biomedicine
Biodiversity Conservation
Ecology
Environmental Sciences
Biodiversity & Conservation
Environmental Sciences & Ecology
allocation
biomass
fine roots
productivity
residence time
soil
turnover
TROPICAL MOUNTAIN FORESTS
NET PRIMARY PRODUCTIVITY
BELOW-GROUND CARBON
GLOBAL PATTERNS
AMAZON FOREST
ELEVATIONAL TRANSECT
ALUMINUM TOXICITY
LITTER PRODUCTION
STAND STRUCTURE
SOIL-NITROGEN
allocation
biomass
fine roots
productivity
residence time
soil
turnover
Africa
Biomass
Ecosystem
Forests
Plant Roots
Rainforest
Soil
South America
Trees
Tropical Climate
Plant Roots
Trees
Soil
Ecosystem
Biomass
Tropical Climate
Africa
South America
Forests
Rainforest
Science & Technology
Life Sciences & Biomedicine
Biodiversity Conservation
Ecology
Environmental Sciences
Biodiversity & Conservation
Environmental Sciences & Ecology
allocation
biomass
fine roots
productivity
residence time
soil
turnover
TROPICAL MOUNTAIN FORESTS
NET PRIMARY PRODUCTIVITY
BELOW-GROUND CARBON
GLOBAL PATTERNS
AMAZON FOREST
ELEVATIONAL TRANSECT
ALUMINUM TOXICITY
LITTER PRODUCTION
STAND STRUCTURE
SOIL-NITROGEN
Ecology
05 Environmental Sciences
06 Biological Sciences
Publication Status: Published
Open Access location: https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.15677
Online Publication Date: 2021-05-12
Appears in Collections:Faculty of Natural Sciences



This item is licensed under a Creative Commons License Creative Commons