Nestedness patterns of sand fly (Diptera: Psychodidae) species in a neotropical semi-arid environment
A common pattern in neotropical Leishmania spp. transmission is the co-occurrence of several sand fly (SF) species at endemic foci. We collected 13 SF spp. by direct aspiration in natural resting places (NRP) and 10 SF spp. with Shannon traps (ST), totaling 15 spp. with both methods, at 6 location...
Autores Principales: | Chaves, Luis Fernando, Anez, Nestor |
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Formato: | Artículo |
Idioma: | Inglés |
Publicado: |
Elsevier
2022
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Materias: | |
Acceso en línea: |
http://hdl.handle.net/11056/23768 https://doi.org/10.1016/j.actatropica.2015.10.001 |
Sumario: |
A common pattern in neotropical Leishmania spp. transmission is the co-occurrence of several sand fly
(SF) species at endemic foci. We collected 13 SF spp. by direct aspiration in natural resting places (NRP)
and 10 SF spp. with Shannon traps (ST), totaling 15 spp. with both methods, at 6 locations within a semi arid region with endemic visceral leishmaniasis transmission in Falcón State, Northwestern Venezuela.
We used null modeltesting of species co-occurrence and nestedness metrics estimated with our field data
to ask whether SF species composition was segregated/aggregated, and if aggregated whether there was
nestedness, i.e., whether species composition across sampling locations could be described by ordered
subsets of species from the most species rich location in a landscape. Results showed that SF species were
aggregated (P < 0.05), i.e., most species were present in species rich locations. Similarly, SF species were
significantly nested (P < 0.05). Differences in pairwise Sørensen and Simpson indices, estimated with the
STdata andthe combinedST andNRPdata, werepositively associated withthedistance betweensampling
locations, suggesting that species nestedness might be partially shaped by dispersal limitation. Our data
showed thatthree species of medical importance were common across the sampling locations: Lutzomyia
gomezi, Lutzomyia panamensis and Lutzomyia evansi, suporting that vector species do not turnover in the
studied setting. |
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