Location of Repository

Vertical stratification of bat activity in an old-growth forest in western Washington

By John P. Hayes and Jeffrey C. Gruver

Abstract

We examined the amount and temporal patterns of bat activity at four different heights in an old-growth conifer forest at the Wind River Canopy Crane Research Facility in south-central Washington. Analysis of 2,304 bat passes showed that amount of activity differed among vertical strata. For Myotis bats, activity was greatest in the lower canopy, followed by the ground-level and upper canopy, respectively. We did not detect activity of Myotis above the canopy. Non-Myotis bats used lower and upper canopies more frequently than ground-level and above the canopy. Temporal patterns of activity generally exhibited a bimodal distribution, but the extent of bimodality and the time and relative size of peaks differed with species group and among heights. Activity was greatest at ground-level early in the night and later shifted to higher strata. Patterns of use of old-growth forests by bats may reflect the complex vertical structure of the vegetation in those forests. Exclusive use of ground-based equipment can result in an incomplete picture of the activity of bats in complex forest standsHayes and Gruver "Vertical stratification of bat activity in an old-growth forest in western Washington." Northwest Science. 2000; 74(2): 102-10

Topics: bat activity, bimodality, canopy: ground-level, lower-, upper-, old growth forest, temporal patterns, vertical stratification
Publisher: WSU Press
Year: 2000
OAI identifier: oai:research.libraries.wsu.edu:2376/1060
Provided by: Research Exchange
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://hdl.handle.net/2376/106... (external link)
  • http://purl.org/eprint/accessR... (external link)
  • http://rightsstatements.org/vo... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.