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作者

Marcela T.P. Oliveira;Jéssica L.S. Silva;Oswaldo Cruz-Neto;Laís A. Borges;Luciana C. Girão;Marcelo Tabarelli;Ariadna V. Lopes

来源

URBAN FORESTRY & URBAN GREENING,Vol.54,Issue1,Article 126779

语言

英文

关键字

Exotic plants;Floral traits;Functional diversity;Native plants;Pollination;Tropical urban ecosystem

作者单位

Programa de Pós-Graduação em Biologia Vegetal, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil;Departamento de Botânica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil;Departamento de Ciências Biológicas, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Paraíba, 58397-000, Brazil;Programa de Pós-Graduação em Biologia Vegetal, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil;Departamento de Botânica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil;Departamento de Ciências Biológicas, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Paraíba, 58397-000, Brazil

摘要

Urban green spaces have gained notoriety in recent years, as they have been argued to play an important role in supporting native biodiversity, ecosystem services and human well-being. However, such a promising perspective is poorly investigated in the tropical context. Here we examine the role played by urban green areas in a major city (Recife-Brazil) as a repository for Atlantic forest biodiversity relative to pollination systems. Plant assemblages were examined across 17 urban green areas and compared to those from ten old-growth forest stands in the largest Atlantic forest remnant in northeastern Brazil (natural areas). Just a small portion of tree species inhabiting urban green areas is native to the northeastern Brazilian Atlantic forest (29.8 %). At plant community-level, squares and parks were impoverished in terms of number of species and individuals with specialized pollination systems (e.g. bats, Sphingids), as compared to forest remnants. Moreover, urban green areas were dominated by generalist-pollinated trees with reproductive traits associated with easily accessible floral resources and an increase of hermaphrodites. Finally, squares and parks had similarly low functional diversity of reproductive traits. Our results suggest that urban green areas support largely distorted and impoverished tree assemblages in terms of floral rewards and pollination, while services are restricted to those offered by generalist small insects. This pattern emerges mainly from the contribution of exotic plants. This largely limits the tropical urban green areas as biodiversity repositories and potential source for specialized pollination services, what calls for a better use of tropical urban areas as conservation tool.