You are here: Home
/ Publication Information
Title: Habitat sequencing and the importance of discharge in inferences
Author: Hilderbrand, Robert H.; Lemly, A. Dennis; Dolloff, C. Andrew;
Source: North American Journal of Fisheries Management 19:198-202
Publication Series: Scientific Journal (JRNL)
Description: The authors constructed stream maps for a low-gradient trout stream in southwestern Virginia during autumn (base flow) and spring (elevated flows) to compare spatial and temporal variation in stream habitats. Pool-riffle sequencing and total area occupied by pools and riffles changed substantially depending on the level of discharge: reduced discharge resulted in an increase in total pool surface area with more numerous but smaller pools than during spring. In contrast, total surface area of riffles decreased with decreasing discharge, as did total wetted surface area. These findings suggest caution should be exercised when comparing seasonal or annual surveys, applying habitat guidelines for assessment or management, evaluating fish standing crop potential from predictive habitat models, or predicting availability of habitat or biological information at times other than when stream surveys are conducted. The authors demonstrate the potential dangers by intentionally applying biological sample results taken at one discharge level to the same stream reach at a different discharge level. The results clearly illustrate the importance of acquiring physical and biological information during similar discharges
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Hilderbrand, Robert H.; Lemly, A. Dennis; Dolloff, C. Andrew 1999. Habitat sequencing and the importance of discharge in inferences. North American Journal of Fisheries Management 19:198-202.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility