KEY FACTORS CONTROLLING THE METAPOPULATION DYNAMICS OF THE LITTLE GREBE TACHYBAPTUS RUFICOLLIS IN AN ARTIFICIAL HABITAT NETWORK OF IRRIGATION PONDS

Autor(es)

Sebastian-Gonzalez, Esther ^[1] ; Luisa Alexander, Karen ^[1] ; Antonio Sanchez-Zapata, Jose ^[1] ; Botella, Francisco ^[1]

Afiliação do(s) autor(es)

^[1] Univ Miguel Hernandez, Area Ecol, Dept Biol, E-03312 Alicante - Spain

• Tipo de documento: Artigo Científico
• Fonte: ARDEOLA; v. 62, n. 1, p. 151-161, JUN 2015.
• Citações Web of Science: 0

Resumo

Most applied metapopulation studies have focused on habitat structures that are the result of landscape fragmentation but few have studied the dynamics in newly created patches. In artificial habitats, factors determining habitat quality can become especially relevant. Here, we studied the dynamics of linked populations of the little grebe Tachybaptus ruficollis inhabiting a group of irrigation ponds, sited and designed purely for agricultural purposes. We used five years of detection/nondetection data to parametrise incidence function models, in order to analyse the metapopulation dynamics of the species. We aimed to detect the role of pond size, isolation and intrinsic pond characteristics related to the habitat quality (i.e. pond construction design) in determining pond colonisation, extinction and turnover rates. We also used repeated surveys during one year to calculate detection probability of the species in the system. The incidence function model used accurately predicted the proportion of irrigation ponds occupied and detection probability was high (0.88). Little grebes inhabiting the irrigation ponds performed as a metapopulation with extinction events related to pond size and colonisation events related to pond construction design but unaffected by isolation factors. Our simulations highlight the importance of pond construction design in the persistence of the metapopulation and show a simple method for studying the dynamics of a population using detection/non-detection data. (AU)

• Processo FAPESP: 11/17968-2 - Variabilidade estrutural e geográfica em redes mutualísticas de plantas e aves frugívoras
• Beneficiário: Esther Sebastián González
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado