Use of foraging habitats by bats in a Mediterranean area determined by acoustic surveys: conservation implications

• Published in: Ecography (Copenhagen) Vol. 26; no. 2; pp. 197 - 209
• Main Authors: Russo, Danilo, Jones, Gareth
• Format: Journal Article
• Language: English
• Published: Copenhagen Munksgaard International Publishers 01.04.2003; Blackwell Publishers; Blackwell
• Subjects: Animal, plant and microbial ecology; Applied ecology; Bats; Biological and medical sciences; Conifers; Conservation, protection and management of environment and wildlife; Foraging; Forest habitats; Fundamental and applied biological sciences. Psychology; Habitat conservation; Habitat preferences; Lakes; Parks, reserves, wildlife conservation. Endangered species: population survey and restocking; Riverine habitats; Towns; Woodlands; Italy; Europe; Feeding behavior; Habitat selection; Acoustic method; Foraging behavior; Vertebrata; Mammalia; Animal activity; Faunal survey; Specific identification; Animal conservation; Environmental monitoring; Chiroptera; Environmental protection
• ISSN: 0906-7590; 1600-0587
• DOI: 10.1034/j.1600-0587.2003.03422.x

We determined habitat use by foraging bats by broad-band acoustic surveys in 10 habitat types from a Mediterranean area (southern Italy). We applied discriminant functions to identify time-expanded echolocation calls from free-flying bats. Moon phase and cloud cover had no effect on bat activity. Only Hypsugo savii was influenced by temperature, and activity of Myotis doubentonii and Myotis capaccinii was reduced at higher wind speeds. Both total numbers of bat passes and feeding buzzes were highest over rivers and lakes. Pipistrellus kuhlii and H. savii were most frequently recorded. Pipistrellus kuhlii, Pipistrellus pipistrellus and Tadarida teniotis proved generalists in using foraging habitats. Water sites and conifer plantations were respectively the most and the least used habitats by H. savii. Rivers were especially important to Myotis bats, Miniopterus schreibersii and Pipistrellus pygmaeus. Unlike P. kuhlii, P. pipistrellus was frequent in beech woodlands; P. pygmaeus made a considerable use of chestnut woodlands and Myotis spp. were moderately active in both these woodland types. A large number of endangered or vulnerable species featured in riparian habitats, broadleaved woodlands and olive groves. Riparian and woodland habitats constitute an important target for conservation. Typical land use forms such as woodlands used for chestnut production and traditionally managed olive groves should be encouraged in conservation plans. The negative impact of urbanisation on bats might be counteracted by fostering trees, gardens and small cultivated patches. Farmland practices should encourage landscape complexity and limit the use of pesticides.