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What drives bat activity at field boundaries?

Thomas Foxley1, Paul Lintott1, Emma Stone1

  • 1Bat Conservation Research Lab, School of Applied Sciences, University of the West of England, Coldharbour Lane, Bristol, BS16 1QY, UK.

Journal of Environmental Management
|December 28, 2022
PubMed
Summary

Bat activity in agricultural fields is highest along tall, wide, vegetated field boundaries with trees. Conservation efforts should incentivize farmers to enhance these boundaries for better bat habitat.

Keywords:
Agricultural land managementField boundariesGeneralised additive modelHedgerowsLinear landscape featuresRhinolophus ferrumequinum

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Area of Science:

  • Ecology
  • Conservation Biology
  • Agricultural Science

Background:

  • Field boundaries are crucial habitats for bats in agricultural landscapes, facilitating commuting and foraging.
  • Understanding the factors influencing bat activity is essential for effective conservation and habitat management strategies.

Purpose of the Study:

  • To investigate the drivers of bat activity along field boundaries in agricultural landscapes.
  • To provide data-driven recommendations for habitat management to support bat populations.

Main Methods:

  • Deployment of 64 full-spectrum bat detectors along field boundaries in North Somerset (July-October 2020).
  • Analysis of recordings using an automated classifier with error rate modeling.
  • Application of generalized additive models to assess bat activity in relation to boundary characteristics, controlling for spatial and temporal factors.

Main Results:

  • Field boundary characteristics were stronger predictors of bat activity than adjacent field attributes or local landscape measures for most species.
  • Bat activity was positively correlated with tall, wide, vegetated field boundaries containing trees.
  • Lower bat activity was observed at arable recording sites, with high variability and predictive error noted.

Conclusions:

  • Management strategies favoring enhanced field boundaries, such as hedgerows with trees, are recommended for bat conservation.
  • Incentivizing farmers to maintain and improve field boundaries can support bat populations in agricultural areas.
  • Spatial effects limit the predictive power of models beyond the study area, highlighting the need for localized management approaches.