Terrestrial laser scanning reveals convergence of tree architecture with increasingly dominant crown canopy position

Autor: Stephane Momo Takoudjou, Nicolas Barbier, Bonaventure Sonké, Pierre Ploton, Raphaël Pélissier, Thierry Fourcaud, Olivier Martin-Ducup, Pierre Couteron, Gislain Ii Mofack, Narcisse Guy Kamdem
Přispěvatelé: Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Yaoundé [Cameroun]
Jazyk: angličtina
Rok vydání: 2020
Předmět:
0106 biological sciences
Canopy
LiDAR
Laser
F62 - Physiologie végétale - Croissance et développement
Biology
Network topology
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics
Phylogenetics and taxonomy
F50 - Anatomie et morphologie des plantes
010603 evolutionary biology
01 natural sciences
shade tolerance
Allométrie
[SDV.EE.ECO]Life Sciences [q-bio]/Ecology
environment/Ecosystems
liberation effect
K01 - Foresterie - Considérations générales
quantitative structural model
Croissance
Shade tolerance
Ecology
Evolution
Behavior and Systematics
Topology (chemistry)
Morphologie végétale
WBE model
Crown (botany)
large trees
15. Life on land
[SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics
Tree (graph theory)
Large trees
Liberation effect
Quantitative structural model
Principal component analysis
Couvert forestier
Allometry
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Biological system
010606 plant biology & botany
Zdroj: Functional Ecology
Functional Ecology, Wiley, 2020, 34 (12), pp.2442-2452. ⟨10.1111/1365-2435.13678⟩
ISSN: 0269-8463
1365-2435
DOI: 10.1111/1365-2435.13678⟩
Popis: International audience; To fulfill their growth and reproductive functions, trees develop a three-dimensional structure that is subject to both internal and external constraints. This is reflected by the unique architecture of each individual at a given time. Addressing the crown dimensions and topological structure of large tropical trees is challenging considering their complexity, size and longevity. Terrestrial laser scanning (TLS) technology offers a new opportunity for characterizing and comparing these properties across a large number of individuals and species. In the present study, we specifically developed topology and geometry metrics of crown architecture from TLS data and investigated how they correlated with metrics of tree and crown form, crown position and shade tolerance. Fifty-nine trees belonging to 14 coexisting canopy species in semideciduous forests of Cameroon were scanned with TLS and reconstructed using quantitative structural models (QSMs). The species belonged to different shade-tolerance groups and were sampled in different crown positions. Crown-form metrics and branch topology metrics were quantified from the TLS data, and principal component analysis (PCA) was used to study how the 59 sampled trees were distributed along axes of architectural diversity. Allometric scaling parameters derived from West Brown and Enquist (WBE) metabolic theory were also quantified from the QSMs, and their correlations with the PCA axes were evaluated. The results revealed that the branch topology and crown-form metrics were not correlated since similar topologies could lead to contrasting crown forms. Crown form, but not branch topology, changed with tree shade tolerance, while convergence in tree topology and towards expected WBE parameters was observed for all trees reaching dominant crown positions independent of species shade tolerance. This convergence is interpreted as resulting from a liberation effect of canopy trees from side-shading constraints, leading to crown development processes through sequential reiteration.
Databáze: OpenAIRE
Externí odkaz: