Multi-trophic invasion resistance in Hawaii: Bioacoustics, field surveys, and airborne remote sensing

Publication Type  Journal Article
Year of Publication  2007
Authors  Boelman, N. T.; Asner, G. P.; Hart, P. J.; Martin, R. E.
Journal Title  Ecological Applications
Volume  17
Issue  8
Pages  2137-2144
Journal Date  Dec
ISBN Number  1051-0761
Accession Number  ISI:000251739800001
Key Words  avifauna; aviris; bioacoustics; hawaiian submontane ecosystems; invasive species; landscape ecology; lidar; light detection and ranging; metrosideros polymorpha; morella faya; visible and infrared imaging spectroscopy; ecosystem; competition; honeycreeper

We used airborne imaging spectroscopy and scanning light detection and ranging (LiDAR), along with bioacoustic recordings, to determine how a plant species invasion affects avian abundance and community composition across a range of Hawaiian submontane ecosystems. Total avian abundance and the ratio of native to exotic avifauna were highest in habitats with the highest canopy cover and height. Comparing biophysically equivalent sites, stands dominated by native Metrosideros polymorpha trees hosted larger native avian communities than did mixed stands of Metrosideros and the invasive tree Morella faya. A multi-trophic analysis strongly suggests that native avifauna provide biotic resistance against the invasion of Morella trees and exotic birds, thus slowing invasion "meltdowns'' that disrupt the functioning of native Hawaiian ecosystems.


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URL  <Go to ISI>://000251739800001