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

Phenological diversity of Maprounea guianensis (Euphorbiaceae) in humid and dry neotropical forests

Marília G. M. dos Santos https://orcid.org/0000-0003-4868-7633 A F , Sâmia P. S. Neves B , Ana P. L. do Couto-Santos C , Carlianne O. Cerqueira D , Davi R. Rossatto E , Lia D. P. de Miranda B and Ligia S. Funch A
+ Author Affiliations
- Author Affiliations

A Programa de Pós-Graduação em Recursos Genéticos Vegetais, Laboratório Flora e Vegetação, Universidade Estadual de Feira de Santana (UEFS), 44036-900, Feira de Santana, BA, Brazil.

B Laboratório Flora e Vegetação, Departamento de Ciências Biológicas, UEFS, 44036-900, Feira de Santana, BA, Brazil.

C Departamento de Ciências Exatas e Naturais, Universidade Estadual do Sudoeste da Bahia (UESB), 45700-000, Itapetinga, BA, Brazil.

D Centro Estadual de Educação Profissional em Saúde do Centro Baiano, 44135-000, Feira de Santana, BA, Brazil.

E Departamento de Biologia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista – UNESP 14884-900, Jaboticabal – SP, Brazil.

F Corresponding author. Email: mara_cte@hotmail.com

Australian Journal of Botany 68(4) 288-299 https://doi.org/10.1071/BT19196
Submitted: 14 December 2019  Accepted: 5 June 2020   Published: 16 July 2020

Abstract

Phenological diversity, seasonality and leaf longevity may affect leaf habits, reflecting plant responses to environmental conditions. Maprounea guianensis Aubl. is a widespread species in Brazil that is associated with different forest types. We investigated how phenological diversity, seasonality and leaf longevity affect leaf habits of its populations growing in humid and dry forests in the Chapada Diamantina mountains. We made monthly observations of leaf budding and fall in 62 individual trees between 2004 and 2012 (84 months), estimating leaf longevity based on phenophase evaluations. We made use of circular statistics, cross correlations and the Shannon–Wiener Index to evaluate our data. There was little variation in rainfall distribution between the study years, although water availability differed at each site. Phenophase seasonality was found to be negatively correlated with rainfall but positively correlated with photoperiod. Low phenological diversity was observed within each site, but not between sites, and leaf longevity was reduced in the dry forest. Although macroclimatic conditions were similar throughout the range of occurrence of M. guianensis in the region, we found that phenological behaviour and leaf longevity differed according to micro-site differences, demonstrating the plasticity of the species, which may favour its occupation of different environments.

Additional keywords: drought, intraspecific variation, photoperiod, water relations.


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