| Autor: |
Lemes da Silva, Aurea Luiza, de Macedo-Soares, Luís Carlos Pinto, Serra, Sónia Raquel Quinás, Petrucio, Mauricio Mello, Feio, Maria João |
| Předmět: |
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| Zdroj: |
Hydrobiologia; Jun2024, Vol. 851 Issue 11, p2731-2748, 18p |
| Abstrakt: |
As the world becomes more urbanized, multiple stressors act in complex ways, but their effects remain poorly studied in coastal island streams. Due to the small length and isolation and the limited amount of freshwater available in the islands, these ecosystems are particularly vulnerable to anthropogenic pressures. Here, we investigated the effects of urbanization on taxonomic and functional diversity of aquatic invertebrate of a subtropical coastal island. Benthic invertebrate communities were sampled using litter bags (10 mm mesh) containing mixtures of leaf litter that were colonized in the stream bottom over 30 days. We hypothesized that invertebrate communities would show alteration in taxonomic and functional composition over the urbanization gradient. Based on the invertebrate communities and their biological traits, we computed the taxonomic richness and four functional diversity indices. Significant changes in taxonomic, functional richness, evenness, and dispersion were observed. Sites with low urbanization (< 5% urbanized area) had a higher proportion of taxa with gill respiration than sites with high level of urbanization (> 15% urbanized area) had higher proportion of taxa with tegument respiration. Sites with medium (15–5% urbanized area) and high urbanization levels exhibited higher proportions of scrapers and collector–gatherers, whereas sites with low urbanization had higher proportions of shredders and collector–filters. Our results show that urbanization changed the benthic communities and their biological traits. These changes can determine variations in the ecosystem processes and compromise the ecosystem services they supply. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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