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Spinning a laser web: predicting spider distributions using LiDAR.

K T Vierling1, C Bässler, R Brandl

  • 1Department of Fish and Wildlife Resources, University of Idaho, Box 441136, Moscow, Idaho 83844-1136, USA. kerriv@uidaho.edu

Ecological Applications : a Publication of the Ecological Society of America
|May 14, 2011
PubMed
Summary

LiDAR remote sensing effectively maps spider diversity and distributions in forests. This technology offers high predictive power comparable to ground methods, aiding invertebrate conservation efforts.

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Area of Science:

  • Ecology
  • Remote Sensing
  • Biodiversity

Background:

  • LiDAR (Light Detection and Ranging) is established for vertebrate studies but underutilized for invertebrates.
  • Understanding invertebrate distributions is crucial for comprehensive biodiversity assessments.

Purpose of the Study:

  • To assess LiDAR's capability in predicting spider single-species distributions and community characteristics in mountainous forest terrain.
  • To compare the predictive power of LiDAR-derived variables against ground-based measurements.

Main Methods:

  • Collected over 5300 spiders using pitfall traps across transects in the Bavarian National Park.
  • Analyzed spider community metrics (richness, diversity indices, composition, body size, abundance) and single-species data.
  • Utilized variance partitioning (R2, partial R2) to evaluate LiDAR vs. ground-based variable contributions.

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Main Results:

  • LiDAR variables explained 25-57% of the variance in species richness, Shannon index, community composition, and body size.
  • LiDAR and ground measurements jointly contributed over 80% to predictive power.
  • LiDAR showed comparable or superior predictive power for single-species distributions, explaining up to 55% of variance.

Conclusions:

  • LiDAR is a cost-effective and powerful tool for mapping spider communities and species distributions at landscape scales.
  • LiDAR data can significantly aid species-specific conservation and broader biodiversity planning for invertebrates, mirroring its utility for vertebrates.