Factors influencing the longitudinal distribution of larval Hydropsychidae (Trichoptera) in a Southern Appalachian stream system. Ross, D. H. Hydrobiologia, 1982.
Factors influencing the longitudinal distribution of larval Hydropsychidae (Trichoptera) in a Southern Appalachian stream system. [pdf]Paper  abstract   bibtex   
The influence of physical habitat variables and suspended particulate organic matter (seston) on the distribution and production of eight species of larval Hydropsychidae was studied along a 6.4-km section of a Southern Appalachian stream. Samples were collected at six stations encompassing stream orders 1-4 and an elevation range of 610 m. Multivariate analysis of covariance (using time as the covariable) and discriminant function analysis were used to examine habitat differences between the sampling stations due to the following variables: current velocity; coarse benthic detritus; substrate composition (by particle size); substrate heterogeneity; degree-days; and diel temperature fluctuation. Hydropsychid species distribution along the stream system followed subfamily lines, i.e., Arctopsychinae and Diplectroninae were more abundant and productive in the upper 4.5 km of the stream, while Hydropsychinae were dominant in the lower 1.9 km. Diel temperature fluctuation was the habitat variable most highly correlated with patterns of hydropsychid abundance and production.
@article{ross_factors_1982,
	title = {Factors influencing the longitudinal distribution of larval {Hydropsychidae} ({Trichoptera}) in a {Southern} {Appalachian} stream system.},
	volume = {96},
	url = {http://cwt33.ecology.uga.edu/publications/543.pdf},
	abstract = {The influence of physical habitat variables and suspended particulate organic matter (seston) on the distribution and production of eight species of larval Hydropsychidae was studied along a 6.4-km section of a Southern Appalachian stream. Samples were collected at six stations encompassing stream orders 1-4 and an elevation range of 610 m.  Multivariate analysis of covariance (using time as the covariable) and discriminant function analysis were used to examine habitat differences between the sampling stations due to the following variables: current velocity; coarse benthic detritus; substrate composition (by particle size); substrate heterogeneity; degree-days; and diel temperature fluctuation.  Hydropsychid species distribution along the stream system followed subfamily lines, i.e., Arctopsychinae and Diplectroninae were more abundant and productive in the upper 4.5 km of the stream, while Hydropsychinae were dominant in the lower 1.9 km. Diel temperature fluctuation was the habitat variable most highly correlated with patterns of hydropsychid abundance and production.},
	journal = {Hydrobiologia},
	author = {Ross, D. H.},
	year = {1982},
	keywords = {CWT}
}
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