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A non-destructive method for three-dimensional characterizing plateau pika's burrow system.

Jing Li1, Baolong Zhu2, Long Ren2

  • 1School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China; School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China.

Journal of Environmental Management
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Summary

This study introduces a new drone and ground-penetrating radar (GPR) method to map plateau pika burrow systems in Qinghai-Tibetan Plateau grasslands. The non-destructive technique accurately reveals burrow structures and their ecological impact.

Keywords:
Alpine grasslandFossorial animalOchotona curzoniaeQinghai-Tibetan plateau

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Area of Science:

  • Ecology
  • Geophysics
  • Remote Sensing

Background:

  • Plateau pika burrow systems significantly impact alpine ecosystems.
  • Existing methods for characterizing burrow spatial structure are inadequate.
  • Understanding burrow systems is crucial for assessing ecological impacts on the Qinghai-Tibetan Plateau (QTP).

Purpose of the Study:

  • To develop and validate a novel, non-destructive method for characterizing the 3D spatial structure of plateau pika burrow systems.
  • To assess the ecological footprint of pika burrows in different grassland degradation states.
  • To provide technical support for ecological research on fossorial animals in the QTP.

Main Methods:

  • Utilized drone imagery and ground-penetrating radar (GPR) scanning in alpine grasslands.
  • Developed a novel signal processing workflow for burrow trajectory detection and 3D reconstruction.
  • Compared GPR-derived burrow dimensions (length, depth, diameter, orientation) with traditional extraction methods.

Main Results:

  • Successfully identified and reconstructed 3D burrow structures in both moderately and severely degraded grasslands.
  • Quantified burrow characteristics, including tunnel length, average depth, and diameter, and their soil volume contribution.
  • Demonstrated high consistency between GPR data and extraction methods, validating the novel approach.

Conclusions:

  • The developed drone and GPR method offers a feasible and non-destructive approach to study pika burrow systems.
  • This technique provides critical data for understanding the ecological roles of fossorial animals on the QTP.
  • The findings support further research into the ecological consequences of burrowing activities in alpine environments.