Assessing community functional attributes during substrate colonization: a field experiment using stream insects
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2019
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Resumo
Initial colonists of empty habitats tend to
differ from those arriving later in terms of species
identity and traits. We evaluated the dynamics of the
functional attributes in aquatic insect communities
during a colonization experiment under natural conditions. We tested whether the late stages of colonization
show higher functional richness, diversity and specialization than early successional stages. We used 60
artificial slate samplers that were removed after 1, 3, 5,
10, 15 and 30 days of colonization. We considered five
traits (with a total of 17 trait categories): feeding habits,
dispersal medium, body size, body shape and locomotion. With these traits, we computed a global specialization index at the community level. Large shredders with a cylindrical body shape and fly dispersal while
flying were prominent in late colonization. In contrast,
early colonists tended to have flattened body and to
disperse through water. Functional diversity and
functional richness significantly increased in late
colonization, resulting in a more specialized community. Our results suggest that any interference during
the processes involved in stream insect colonization
can be reflected in the community through the decrease
or even lack of functional attributes.
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Functional diversity, Community specialization index, Functional richness, Successional stages
Citação
MILESI, Silvia V.; MELO, Adriano S.; DOLÉDEC, Sylvain. Assessing community functional attributes during substrate colonization: a field experiment using stream insects. Hydrobiologia, Berlin, v. 838, p. 183-192, 2019. DOI: 10.1007/s10750-019-03988-2. Disponível em: https://link.springer.com/article/10.1007/s10750-019-03988-2. Acesso em: 2 jun. 2023.