Both the selection and complementarity effects underpin the effect of structural diversity on aboveground biomass in tropical forests

被引:11
作者
Noulekoun, Florent [1 ]
Mensah, Sylvanus [2 ]
Dimobe, Kangbeni [3 ,4 ]
Birhane, Emiru [5 ,6 ]
Kifle, Eguale Tadesse [7 ]
Naab, Jesse [8 ]
Son, Yowhan [9 ]
Khamzina, Asia [1 ,10 ]
机构
[1] Korea Univ, Dept Environm Sci & Ecol Engn, Seoul, South Korea
[2] Univ Abomey Calavi, Fac Sci Agron, Lab Biomath & Estimat Forestieres, Abomey Calavi, Benin
[3] Univ Joseph Ki Zerbo, Lab Biol & Ecol Vegetales, Ouagadougou, Burkina Faso
[4] Univ Dedougou, Inst Sci Environm & Dev Rural, Dept Eaux Forets & Environm, Dedougou, Burkina Faso
[5] Mekelle Univ, Dept Land Resources Management & Environm Protect, Mekelle, Ethiopia
[6] Norwegian Univ Life Sci NMBU, Fac Environm Sci & Nat Resource Management, As, Norway
[7] Ethiopian Environm & Forest Res Inst EEFRI, Plantat & Agroforestry Res Directorate, Addis Ababa, Ethiopia
[8] West African Sci Serv Ctr Climate Change & Adapted, RTC Climate Smart Agr, Ouagadougou, Burkina Faso
[9] Korea Univ, Coll Life Sci & Biotechnol, Div Environm Sci & Ecol Engn, Ecosyst Ecol Lab, Seoul, South Korea
[10] Korea Univ, Dept Environm Sci & Ecol Engn, Seoul 02841, South Korea
来源
GLOBAL ECOLOGY AND BIOGEOGRAPHY | 2023年
基金
新加坡国家研究基金会;
关键词
drylands; forest structure; functional diversity; maximum plant height; soil fertility; specific leaf area; structural equation modelling; tropical forests; TERRESTRIAL PLANT-PRODUCTION; TREE PRODUCTIVITY; FUNCTIONAL DIVERSITY; SPECIES-DIVERSITY; SOIL FERTILITY; BASIC DENSITY; R PACKAGE; CLIMATE; BIODIVERSITY; COMPETITION;
D O I
10.1111/geb.13800
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
AimDespite mounting empirical evidence regarding the positive effects of forest structural diversity (STRDIV) on forest functioning, the underlying biotic mechanisms and controlling abiotic factors remain poorly understood. This study provides the first assessment of the interactive effects of STRDIV and diversity in species and functional traits on aboveground biomass (AGB) in natural forests in West and East Africa.LocationWest and East Africa.Time period2014-2020.Major taxa studiedWoody plants.MethodsUsing data from 276 plots and 7993 trees of 207 species distributed across various types of natural forests and major climatic zones of Africa, linear mixed-effects and structural equation models, we have evaluated how alternative causal relationships between STRDIV and taxonomic and functional diversity attributes influence AGB, while accounting for the effects of environmental covariates. We also assessed the consistency of these relationships across floristically and environmentally homogenous forest types.ResultsWe found that the positive effects of STRDIV on AGB were underpinned by both the community-weighted mean (CWM) of trait values (selection effects) and species richness (niche complementarity), but the relative importance of these effects varied depending on forest types. Across the forest types, STRDIV primarily mediated the effects of CWM of traits and species richness on AGB. We also found that STRDIV-AGB relationships were constrained by resource (water and nutrient) availability.Main conclusionsOur findings provide novel insights into the role of functional traits as key determinants of the effects of STRDIV on AGB in tropical forests. We suggest that forest management and climate change mitigation strategies aimed at conserving biodiversity, and fostering biomass storage through increased STRDIV should focus on maintaining high levels of functionally dominant species while also increasing tree species diversity.
引用
收藏
页码:325 / 340
页数:16
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