Arthropods were sampled from branches of saltcedar, Tamarix spp., and willow trees, Salix spp. using a new funnel bucket technique. This is a modification of the beat-bucket design. The funnel bucket was compared to results found by using a traditional 5-gallon bucket, sweep net, and beat sheet. Each method was assessed for effectiveness of arthropod capture. Sixteen saltcedar trees and 16 willow trees were sampled with each method for 10 seconds per compass side of the tree. The means, standard errors, and n needed for a 90% confidence interval are provided for each technique. The funnel bucket method collected numbers of arthropods comparable to the other sampling techniques tested. This technique may be another option for sampling in trees and shrubs, especially for arthropod predators.
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1 October 2010
A Modified Sampling Method to Capture Arboreal Arthropods
Eric M. Knutson
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