Relations among riparian grazing, sediment loads, macroinvertebrates, and fishes in three central Pennsylvania streams

摘要: We assessed relations among riparian grazing, sediment loads, macroinvertebrates, and fishes in three streams adjacent catchments central Pennsylvania. The consisted mostly of agricultural forest lands. Lengths subjected to grazing were 2.5 km along Cedar Run 4.1 Slab Cabin Run; there was no Spring Creek. Median daily discharge temperatures during summer winter significantly different streams. Annual yields 113, 255, 273 t Creek, Run, respectively. Substrate permeability potential spawning sites for brown trout ( Salmo trutta), densities benthic macroinvertebrates higher Creek than the other Densities wild 5-23 times Run. Although marked differences with without watershed attributes could have had some influence on these Resume : Nous avons evalue les existant entre le broutage riverain, la charge de sediments, macro-invertebres et poissons, dans trois petits cours d'eau bassins-versants voisins, centre Pennsylvanie. Ces etaient principalement recouverts terres agricoles forets. Le riverain touchait 2,5 du 4,1 alors que berges ruisseau n'etaient soumises a aucun broutage. debit quotidien moyen ainsi estivales hivernales sensiblement differents selon d'eau. La production annuelle sediments etait 113 pour Spring, 255 permeabilite des substrats pouvant servir frayeres truite brune trutta) densite benthiques significativement plus elevees cas celui deux autres De meme, truites brunes sauvages fois elevee Il existe donc marquees soumis non au mais il est possible d'autres caracteristiques aient eu une incidence sur ces (Traduit par Redaction)