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A. and Vos, Vincent Antoine and Zent, Stanford and Zent, Egleé L. and Noronha, Janaína Costa and Albuquerque, Bianca Weiss and Cano, Angela and Carrero Márquez, Yrma Andreina and Costa, Janaina Barbosa Pedrosa and Flores, Bernardo Monteiro and Galbraith, David and Holmgren, Milena and Kalamandeen, Michelle and Nascimento, Marcelo Trindade and Oliveira, Alexandre A. and Ramirez‐Angulo, Hirma and Rocha, Maira and Scudeller, Veridiana Vizoni and Sierra, Rodrigo and Tirado, Milton and van der Heijden, Geertje and Vilanova Torre, Emilio and Vriesendorp, Corine and Pombo, Maihyra Marina and Ahuite Reategui, Manuel Augusto and Baider, Cláudia and Balslev, Henrik and Cárdenas, Sasha and Casas, Luisa Fernanda and Farfan‐Rios, William and Ferreira, Cid and Linares‐Palomino, Reynaldo and Mendoza, Casimiro and Mesones, Italo and Torres‐Lezama, Armando and Urrego Giraldo, Ligia Estela and Villarroel, Daniel and Zagt, Roderick and Parada, Germaine Alexander and Alexiades, Miguel N. and de Oliveira, Edmar Almeida and Garcia‐Cabrera, Karina and Hernandez, Lionel and Palacios Cuenca, Walter and Pansini, Susamar and Pauletto, Daniela and Ramirez Arevalo, Freddy and Sampaio, Adeilza Felipe and Valderrama Sandoval, Elvis H. and Valenzuela Gamarra, Luis and ter Steege, Hans (2023) Geographic patterns of tree dispersal modes in Amazonia and their ecological correlates. Global Ecology and Biogeography, 32 (1). pp. 49-69. ISSN 1466-822X
Full text not available from this repository.Abstract
Aim: To investigate the geographic patterns and ecological correlates in the geographic distribution of the most common tree dispersal modes in Amazonia (endozoochory, synzoochory, anemochory and hydrochory). We examined if the proportional abundance of these dispersal modes could be explained by the availability of dispersal agents (disperser-availability hypothesis) and/or the availability of resources for constructing zoochorous fruits (resource-availability hypothesis). Time period: Tree-inventory plots established between 1934 and 2019. Major taxa studied: Trees with a diameter at breast height (DBH) ≥ 9.55 cm. Location: Amazonia, here defined as the lowland rain forests of the Amazon River basin and the Guiana Shield. Methods: We assigned dispersal modes to a total of 5433 species and morphospecies within 1877 tree-inventory plots across terra-firme, seasonally flooded, and permanently flooded forests. We investigated geographic patterns in the proportional abundance of dispersal modes. We performed an abundance-weighted mean pairwise distance (MPD) test and fit generalized linear models (GLMs) to explain the geographic distribution of dispersal modes. Results: Anemochory was significantly, positively associated with mean annual wind speed, and hydrochory was significantly higher in flooded forests. Dispersal modes did not consistently show significant associations with the availability of resources for constructing zoochorous fruits. A lower dissimilarity in dispersal modes, resulting from a higher dominance of endozoochory, occurred in terra-firme forests (excluding podzols) compared to flooded forests. Main conclusions: The disperser-availability hypothesis was well supported for abiotic dispersal modes (anemochory and hydrochory). The availability of resources for constructing zoochorous fruits seems an unlikely explanation for the distribution of dispersal modes in Amazonia. The association between frugivores and the proportional abundance of zoochory requires further research, as tree recruitment not only depends on dispersal vectors but also on conditions that favour or limit seedling recruitment across forest types.