A Comparison of Gravimetric and Photographic Methods of Stream Substrate Analysis in a Study of Benthos Microdistribution
- 1 January 1979
- Vol. 33 (1), 74-79
- https://doi.org/10.2307/3544514
Abstract
Substrate particle size and the amount of detritus were measured by standard gravimetric sieve analysis and from photographs of the substrate surface. Details of the photographic technique are presented. The effectiveness of the variables in accounting for the variation in the numbers of Gammarus pulex (L.) between samples was assessed by multiple regression analysis. Photographic variables accounted for 49.5% of the variation and gravimetric variables 26.4%. The photographic technique is less laborious and provides information more relevant to the microdistribution of benthic animals which do not penetrate deeply into the substrate.This publication has 3 references indexed in Scilit:
- Aspects of the Future of EcologyBioScience, 1968
- Rainbow Trout and Bottom Fauna Production in One Mile of StreamTransactions of the American Fisheries Society, 1937
- Application of Logarithmic Moments to Size Frequency Distributions of SedimentsJournal of Sedimentary Research, 1936