Patterns in Stream Fish Assemblage Structure and Function Associated With a PCB Gradient

2013 ◽  
Vol 65 (2) ◽  
pp. 286-299 ◽  
Author(s):  
Thomas P. Simon ◽  
Charles C. Morris ◽  
Daniel W. Sparks
Keyword(s):  
Fish Assemblage ◽  
Structure And Function ◽  
Assemblage Structure ◽  
Stream Fish ◽  
Fish Assemblage Structure ◽  
And Function

scholarly journals Regional, watershed, and site-specific environmental influences on fish assemblage structure and function in western Lake Superior tributaries

2005 ◽  
Vol 62 (6) ◽  
pp. 1254-1270 ◽  
Author(s):  
John C Brazner ◽  
Danny K Tanner ◽  
Naomi E Detenbeck ◽  
Sharon L Batterman ◽  
Stacey L Stark ◽  
...  
Keyword(s):  
Fish Assemblage ◽  
Brook Trout ◽  
Fish Assemblages ◽  
Lake Superior ◽  
Structure And Function ◽  
Assemblage Structure ◽  
Fish Assemblage Structure ◽  
Site Specific ◽  
Western Lake ◽  
And Function

The relative importance of regional, watershed, and in-stream environmental factors on fish assemblage structure and function was investigated in western Lake Superior tributaries. We selected 48 second- and third-order watersheds from two hydrogeomorphic regions to examine fish assemblage response to differences in forest fragmentation, watershed storage, and a number of other watershed, riparian, and in-stream habitat conditions. Although a variety of regional, fragmentation, and storage-related factors had significant influences on the fish assemblages, water temperature appeared to be the single most important environmental factor. We found lower water temperatures and trout–sculpin assemblages at lower fragmentation sites and higher temperatures and minnow–sucker–darter assemblages as storage increased. Factors related to riparian shading and flow separated brook trout streams from brown trout (Salmo trutta) – rainbow trout (Oncorhynchus mykiss) streams. Functionally, fish assemblages at lower fragmentation sites were dominated by cold-water fishes that had low silt tolerance and preferred moderate current speeds, while fishes with higher silt tolerances, warmer temperature preferences, and weaker sustained swimming capabilities were most common at higher storage sites. Our results suggest that site-specific environmental conditions are highly dependent on regional- and watershed-scale characters and that a combination of these factors operates in concert to influence the structure and function of stream fish assemblages.

Riparian influences on stream fish assemblage structure in urbanizing streams

2006 ◽  
Vol 22 (3) ◽  
pp. 385-402 ◽  
Author(s):  
Allison H. Roy ◽  
Byron J. Freeman ◽  
Mary C. Freeman
Keyword(s):  
Fish Assemblage ◽  
Assemblage Structure ◽  
Stream Fish ◽  
Fish Assemblage Structure
Sign in / Sign up

Export Citation Format

Share Document