High richness of exotic trees in tropical urban green spaces: Reproductive systems, fruiting and associated risks to native species

Silva, Jéssica Luiza S.; Oliveira, Marcela Tomaz Pontes de; Oliveira, Willams; Borges, Laís Angélica; Cruz‐Neto, Oswaldo; Lopes, Ariadna Valentina

doi:10.1016/j.ufug.2020.126659

Cited by 28 publications

(22 citation statements)

References 64 publications

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“…Em ambientes perturbados ou invadidos, polinizadores que dependem de poucas plantas para seus recursos declinaram mais (o que leva ao declínio das plantas que dependem destes), enquanto os generalistas prosperaram (Biesmeijer et al, 2006). Silva et al (2020) em levantamento e caracterização reprodutiva de espécies em espaços verdes urbanos em Recife (PE), encontraram um alto percentual de espécies exóticas com sistema reprodutivo auto-incompatível produzindo frutos, indicando que estas espécies estão competindo com espécies locais por polinizadores, o que pode reduzir o sucesso reprodutivo das espécies nativas. Além disso a produção de frutos por espécies exóticas pode aumentar o risco de invasão biológica, caso sejam dispersos em áreas naturais próximas por animais ou mesmo pessoas que os consomem.…”

Section: Diversidade De Espécies E Diversidade Funcional-reprodutiva Entre Comunidades Vegetais Arbóreo-arbustivas Urbanas E Naturaisunclassified

“…Portanto, espécies exóticas e invasoras são capazes de impactar negativamente os serviços ecossistêmicos de polinização, tanto ao serem polinizadas por espécies generalistas ou exóticas, o que as faz permanecer no habitat, podendo levar ao declínio de espécies polinizadores especialistas e suas respectivas plantas alvo (Charles & Dukes, 2008;Traveset & Richardson, 2006), quanto ao competir por polinizadores com espécies nativas, reduzindo o sucesso reprodutivo destas e aumentando igualmente o risco de invasão biológica de espécies exóticas (Silva et al, 2020).…”

Section: Diversidade De Espécies E Diversidade Funcional-reprodutiva Entre Comunidades Vegetais Arbóreo-arbustivas Urbanas E Naturaisunclassified

“…Esses atributos reprodutivos são amplamente utilizados para caracterizar e fornecer informações relacionadas ao funcionamento das comunidades (p.ex. Fontaine, Dajoz, Meriguet & Loreau, 2006;Girão, Lopes, Tabarell & Bruna, 2007;Machado & Lopes, 2003;Martins & Batalha, 2006;Oliveira & Gibbs, 2000;Sobrevilla & Arroyo, 1982;Vamosi, Knight, Steets, Mazer, Burd & Ashman, 2006;Zapata & Arroyo,1978), inclusive de comunidades urbanas (Ferreira & Consolaro, 2013;Mendonça & Anjos, 2005;Silva et al, 2020). A diversidade desses caracteres pode indicar, por exemplo, se comunidades urbanas fornecem esse serviço ecossistêmico de maneira que possibilite sustentar uma maior diversidade possível de polinizadores e suas interações.…”

Section: Introductionunclassified

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Floristic and functional-reproductive diversity of arboreal and shrub species present in the ornamentation of squares in São Raimundo Nonato, PI, Brazil

Silva¹,

Meiado²,

Soares³

2021

TerraPlural

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We evaluated the urban green area of the São Raimundo Nonato city (PI), regarding the floristic composition and the pollination service, comparing it with the natural ecosystem (caatinga). We employed indices of functional diversity of the reproductive traits by means of the usual procedures of collect and identification of species, classification (the origin, floral attributes, and pollination syndromes), followed by data analysis. The results show that the urban area presents a greater functional diversity because of the richness of exotic species, but with specialized pollination systems and resources inaccessible to native pollinators. By removing them, the rates are higher in the caatinga, revealing the need for planning in afforestation with native species suggested.

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Section: Diversidade De Espécies E Diversidade Funcional-reprodutiva Entre Comunidades Vegetais Arbóreo-arbustivas Urbanas E Naturaisunclassified

Section: Introductionunclassified

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Floristic and functional-reproductive diversity of arboreal and shrub species present in the ornamentation of squares in São Raimundo Nonato, PI, Brazil

Silva¹,

Meiado²,

Soares³

2021

TerraPlural

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show abstract

“…African cities are highly diverse in both native and exotic tree species but the exotic species dominate in many areas (Dangulla and Latifah, 2019). The low representativeness of local plants in ornamental choices is due to ecological and cultural reasons: their low productivity and the relative disinterest of customers (Soma, 2012). In the process of appropriation of urban space, local or spontaneous plants were undesirable and systematically eliminated from domestic and public gardens to make way for exotic ornamental plants, indicatives of cleanliness and order (Menozzi, 1998(Menozzi, , 2007Traoré, 2011).…”

Section: Origin Of Burkina Faso City Treesmentioning

confidence: 99%

“…Furthermore, insufficient or partial information exists about the forest potential in urban areas (Ouédraogo, 2005;Soma, 2012), marked mainly by introduction of many exotic species. In addition to that, there is limited knowledge about the functions and uses of cities trees.…”

Section: Introductionmentioning

confidence: 99%

Floristic diversity, origins and properties of city trees in Burkina Faso

Ganaba¹

2020

Int. J. Bio. Chem. Sci

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In Burkina Faso, insufficient or partial information exists on the forest potential of urban areas, marked mainly by the introduction of many exotic species. The objective of this study was to assess the floristic diversity of city trees, to reveal the benefits and risks associated with their properties in a context of climate change, increasing demography and accelerated urbanization. Surveys on 49 urban municipalities were conducted from 2015 to 2020 to identify and describe species at different phenological stages to enable photographic image recognition. Confirmations are made with floras, previous works and documentary compilations. The analyses relate to the biological diversity of species, their origins and uses. The floristic diversity of Burkina Faso's city trees consists of 251 species belonging to 174 genera and 58 families. It is comprised of 178 introduced species and 73 native species. The most represented families are Arecaceae with 7.97% of species, Euphhorbiaceae (7.57%), Moraceae (6.37%), Fabaceae - Mimosoideae (5.98%), Apocynaceae (5.98%) and the Fabaceae - Caesalpinioideae (5.58%). The most common species are Khaya senegalensis, Mangifera indica and Azadirachta indica. This work has helped to characterize the city trees of Burkina Faso. It will update the flora of the country, which is enriched with 36 new exotic species.Keywords: Urban tree, characterization, biological diversity, communes.

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Widespread introduced species dominate the urban tree assemblage on the endemic‐rich tropical island of São Tomé

Strauß,

de Lima,

Baker

et al. 2024

Ecology and Evolution

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The Afrotropics are experiencing some of the fastest urbanisation rates on the planet but the impact of city growth on their rich and unique biodiversity remains understudied, especially compared to natural baselines. Little is also known about how introduced species influence β‐diversity in these contexts, and how patterns coincide with native ranges of species. Here we investigated how tree assemblages of the endemic‐rich Afrotropical island of São Tomé differed between urban, rural and natural zones. These were primarily characterised by urban greenspaces, shade plantations, and old‐growth forests, respectively. Based on 81 transects, we assessed biodiversity metrics of endemic, native and introduced species. Tree abundance and species richness were highest in the natural zone, where the composition was most different from the urban zone. The tree community of the rural zone was the most uneven and had the least variation among transects, representing the lowest β‐diversity. The urban zone was dominated by introduced species (57.7%), while the natural zone hosted almost exclusively native species (93.3%), including many endemics (26.1%). The biogeographic realms that species originated from were particularly diverse in the urban zone, with few species from the Afrotropics. In contrast to native and endemic trees, introduced trees were clearly associated with urban and rural expansion, as they were much more abundant and species‐rich in these zones than in the natural zone, facilitating biotic homogenisation. These findings highlight how urban and rural environments are affecting the native tree flora of São Tomé, and the need for conservation measures geared towards globally threatened and endemic tree species. Importantly, these require the protection of natural forests, despite the rising land demands for settlements and agriculture. Ultimately, such action to conserve endemic trees will contribute to global efforts to prevent further biodiversity declines.

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High richness of exotic trees in tropical urban green spaces: Reproductive systems, fruiting and associated risks to native species

Cited by 28 publications

References 64 publications

Floristic and functional-reproductive diversity of arboreal and shrub species present in the ornamentation of squares in São Raimundo Nonato, PI, Brazil

Floristic and functional-reproductive diversity of arboreal and shrub species present in the ornamentation of squares in São Raimundo Nonato, PI, Brazil

Floristic diversity, origins and properties of city trees in Burkina Faso

Widespread introduced species dominate the urban tree assemblage on the endemic‐rich tropical island of São Tomé

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