HJA newt logo HJ Andrews
Login Donate
visit HJA Andrews on Twitter visit HJA Andrews on Facebook HJA RSS news feed

  Home > Publications > Search Bibliography > Publication Abstract
Publication Title:   Canopy removal and sediment accumulation perturbation in Northwest streams [Abstract]

Year:  1981     Publication Type:  Abstract

H. J. Andrews Publication Number:  1866

Citation:  Hawkins, Charles. 1981. Canopy removal and sediment accumulation perturbation in Northwest streams [Abstract]. Bulletin of the Ecological Society of America. 62(2): 74-75.

Online PDF:  http://andrewsforest.oregonstate.edu/pubs/pdf/pub1866.pdf

Abstract:  Modification of riparian canopies and accumulation of fine sediment in streams are two man-inducedperturbations that are ubiquitous in watersheds of the Pacific Northwest. Results from a two-year fieldstudy show that both sediment concentration and degree of shading affect structure, functional characterand abundance of invertebrate communities and production of vertebrate populations. Although inver-tebrate community structure was not always clearly correlated with presence or absence of a canopy,functional character was. Production and abundance of the vertebrate fauna were related to shifts in functional organization and abundance of the invertebrate community: open sites consistently had moreinvertebrate herbivores and greater biomass of vertebrates than shaded sites. Among shaded streams,both invertebrate and vertebrate abundances were negatively correlated with percent fine sediment (<1mm). Among streams with no canopy, significant correlations between sediment and abundance werefound for some vertebrate species but not for total invertebrates or total vertebrates.

Personnel and Keyword Links

Author Links
Hawkins ,  Charles   P.

Aquatic invertebrates
Biomass (invertebrates)
Biomass (vertebrates)
Canopy communities
Community structure
Forest canopy
Functional groups
Riparian vegetation
Stream communities

Pacific Northwest