Bat community response to intensification of biomass production for bioenergy across the southeastern United States
Cite this dataset
Ober, Holly et al. (2020). Bat community response to intensification of biomass production for bioenergy across the southeastern United States [Dataset]. Dryad. https://doi.org/10.5061/dryad.69p8cz8z3
Abstract
Methods
As part of a large investigation on bioenergy and biodiversity, we collected bat occurrence and activity data from 84 study sites stratified across three broad geographic regions in the states of Alabama, Florida, and Georgia, USA. We selected sites so that they occurred in eight different land use types: clearcuts (0-3 years post-harvest) with logging residues removed, clearcuts of similar age with residues retained, young plantations (8-10 years), mature plantations (20-32 years), recently thinned stands (12-16 years), stands of similar age (12-16 years) that were not thinned, corn fields, and natural (unplanted) mature pine stands. The latter were natural forests of longleaf pine (Pinus palustris) representative of the historical conditions that prevailed across the study region prior to the advent of modern agricultural and forestry production. All other forest surveys occurred in plantations of slash pine (P. elliottii) and loblolly pine (P. taeda), the two most common species grown for timber in the region.
We surveyed bat activity by recording bat echolocation calls. We placed four Anabat II echolocation detectors coupled with Zero Crossing Analysis Interface Modules (ZCAIMS, Titley Electronics, Ballina, NSW, Australia) simultaneously at each study site on 336 nights between late March and late July during 2013-2015. Two detectors were placed at the center of each site and two near the edge. We attempted to survey each site four times per field season. Detectors were programmed to turn on 30 min prior to sunset and off 30 min after sunrise.
We used Kaleidoscope Pro 3.14B (Wildlife Acoustics, Inc.) with the ‘Bats of Florida Classifier’ (3.1.0) to identify and analyze calls. We used the “balanced” sensitivity/accuracy setting in Kaleidoscope Pro (which gives parity to both sensitivity and accuracy) and assessed all files with characteristics of more than one species, retaining only those in which >50% of the calls matched the species identification assigned by the software.
Funding
National Institute of Food and Agriculture, Award: 2012-67009-20090