Local Forest Structure and Host Specificity Influence Liana Community Composition in a Moist Central African Forest
2025
Kaçamak, Begüm | Réjou-Méchain, Maxime | Rowe, Nick P | Rossi, Vivien | Barbier, Nicolas | Bazan, Samantha | Forni, Eric | Guibal, Daniel | Harris, David J. | Panzou, Jopaul, Loubota | Loumeto, Jean-Joël | Marcon, Eric | Pinho, Bruno, X | Zombo, Isaac | Gourlet-Fleury, Sylvie | Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM) | Forêts et Sociétés (UPR Forêts et Sociétés) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Département Environnements et Sociétés (Cirad-ES) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Systèmes d'Elevage Méditerranéens et Tropicaux - Laboratoire de Recherche sur le Développement de l'Elevage (SELMET-LRDE) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | BioWooEB (UPR BioWooEB) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM) | Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Royal Botanic Garden [Edinburgh] | Université Denis Sassou Nguesso (UDSN) | Université Marien-Ngouabi [Université de Brazzaville] = Marien Ngouabi University [University of Brazzaville] (UMNG) | AgroParisTech | Universität Bern = University of Bern = Université de Berne (UNIBE) | The experimental site is supported by the FFEM (“Fonds Français pour 686 l'Environnement Mondial”) and AFD (“Agence Française de Développement”), DynAfFor Project, convention CZZ1636.01D and CZZ1636.02D, and the P3FAC Project, convention CZZ 2101.01 | ANR-20-CE32-0010,DESSFOR,ETATS STABLES DEGRADES EN FORETS TROPICALES(2020) | European Project: 824074,H2020-EU.1.2. - EXCELLENT SCIENCE - Future and Emerging Technologies (FET) ; H2020-EU.1.2.2. - FET Proactive,10.3030/824074,GrowBot(2019)
International audience
显示更多 [+] 显示较少 [-]英语. Lianas are important components of tropical forest diversity and dynamics, yet little is known about the drivers of their community structure and composition. Combining extensive field and LiDAR data, we investigated the influence of local topography, forest structure, and tree composition on liana community structure, and their floristic and functional composition, in a moist forest in northern Republic of Congo. We inventoried all lianas ≥ 1 cm in diameter in 144 20 × 20-m quadrats located in four 9-ha permanent plots, where trees and giant herbs were inventoried. We characterized the functional strategies of selected representatives of the main liana taxa using a set of resource-use leaf and wood traits. Finally, we used complementary statistical analyses, including multivariate and randomization approaches, to test whether forest structure, topography, and tree composition influence the structure, floristic composition, and functional composition of liana communities. The structure of liana communities was strongly shaped by local forest structure, with higher abundances and total basal areas in relatively open-canopy forests, where lianas competed with giant herbs. Liana floristic composition exhibited a weak spatial structure over the study site but was marginally influenced by the local forest structure and topography. Only forest structure had a weak but significant effect on liana functional composition, with more conservative strategies-higher stem tissue density and lower PO 4 leaf concentration and SLA values-in tall and dense forests. Finally, we found evidence of host specificity with significant attraction/repulsion for 19% of the tested liana and tree species associations, suggesting that the unexplained floristic variation may be partly attributed to these host-species-specific associations, although the underlying mechanisms behind remain elusive. Overall, our findings<p>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.</p>
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