Abstract
We present measurements of atmospheric insect fauna intercepted by a static lidar transect over arable and pastoral land over one day. We observe nearly a quarter million of events which are calibrated to optical cross section. Biomass spectra are derived from the size distribution and presented against space and time. We discuss detection limits and instrument biasing, and we relate the insect observations to relevant ecological landscape features and land use. Future directions and improvements of the technique are also outlined.
Highlights
AND MOTIVATIONAnthropogenic exploitation of the environment, such as agricultural intensification including pesticide use, has profound effects on the atmospheric fauna in the agricultural landscape[1]
We present measurements of atmospheric insect fauna intercepted by a static lidar transect over arable and pastoral land over one day
We explore the potential of using a remote sensing technique to investigate both the diversity of the insect fauna, and the insect occurrence in relation to field use and landscape borders
Summary
Anthropogenic exploitation of the environment, such as agricultural intensification including pesticide use, has profound effects on the atmospheric fauna in the agricultural landscape[1]. The consequences of anthropogenic agricultural activity and its impact on the composition of the air-born fauna is less known. A more heterogeneous landscape including, field borders, vegetated islands, trees, pastures used for grazing and higher variation in crop diversity is likely to have a larger abundance and diversity of the farmland insect fauna[6]. We explore the potential of using a remote sensing technique to investigate both the diversity of the insect fauna, and the insect occurrence in relation to field use and landscape borders. We present the biomass spectra derived from the optical cross section (OCS) of lidar-sensed atmospheric insect fauna during one day. We define backscatter OCS as the product of diffuse reflectance and projected area, and extinction OCS as the product of ballistic opaqueness and the projected area
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