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Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems
RESEARCH ARTICLE

Functional traits in Myrteae species: the role of habitat heterogeneity and genus in humid and seasonal tropical environments

Paulo Sérgio Neves dos Santos https://orcid.org/0000-0002-4717-1785 A * , Davi Rodrigo Rossatto https://orcid.org/0000-0001-9510-8345 B , Marla Ibrahim Uehbe de Oliveira https://orcid.org/0000-0001-8034-6068 C , Ana Paula Lima do Couto-Santos https://orcid.org/0000-0003-4349-7136 D and Ligia Silveira Funch https://orcid.org/0000-0001-7096-0187 A
+ Author Affiliations
- Author Affiliations

A Laboratório Flora e Vegetação, Programa de Pós-graduação em Botânica, Universidade Estadual de Feira de Santana (UEFS), Novo Horizonte, Feira de Santana, BA, Brazil.

B Departamento de Biologia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brazil.

C Universidade Federal de Sergipe (UFS), Herbário da Universidade Federal de Sergipe (ASE), Cidade Universitária Prof. José Aloísio de Campos, CCBS, DBI, Bairro Jardim Rosa Elze, São Cristóvão, SE, Brazil.

D Departamento de Ciências Exatas e Naturais, Universidade Estadual do Sudoeste da Bahia (UESB), Itapetinga, BA, Brazil.

* Correspondence to: paulosergio.ns@hotmail.com

Handling Editor: Sarah Luxton

Australian Journal of Botany 71(1) 43-53 https://doi.org/10.1071/BT22057
Submitted: 27 May 2022  Accepted: 23 January 2023   Published: 22 February 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context: Morphological traits allow for plant persistence in various environments differing in edaphic and climatic aspects, and their values are normally the result of the diversity of genera and species occurring in a certain region. Myrteae, a widespread tribe of Myrtaceae, is found in varied environmental conditions ranging from dry to wet environments; thus, it is a potential study group for understanding trait variation.

Aims: Considering that functional-trait variation can be selected by environmental filters, and also be affected by phylogenetic aspects, we used the diversity of the Myrteae group present in different vegetation types in north-eastern Brazil to understand the role of the environment and genus in trait variation.

Methods: Two morphological traits, namely, wood density and specific leaf area, were sampled in 29 species from 6 genera in the following four vegetation types: savanna, seasonally dry tropical forest, rupestrian grassland and humid forest. We assessed how variation in the two traits was related to genus and environmental conditions.

Key results: The studied species showed trait variation depending on the environment and genus. Wood density was mainly determined by genus, whereas specific leaf area was mostly influenced by the environment.

Conclusion: The most important determinant of interspecific trait variation differed between wood density and specific leaf area in this study. Wood density was strongly related to genus, suggesting it is a conserved trait in Myrteae, whereas specific leaf area tended to be more variable.

Implications: Our results contribute to understanding the causes of morphological and genetic variability in Myrteae.

Keywords: humid forest, Myrcia, Myrtaceae, rupestrian grassland, savanna, seasonally dry tropical forest, specific leaf area, wood density.


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