ORGANIC MATTER DYNAMICS IN SMALL STREAMS OF THE PACIFIC NORTHWEST

2005 ◽  
Vol 41 (4) ◽  
pp. 921-934 ◽  
Author(s):  
John S. Richardson ◽  
Robert E. Bilby ◽  
Carin A. Bondar
Keyword(s):  
Organic Matter ◽  
Pacific Northwest ◽  
The Pacific ◽  
Small Streams ◽  
Organic Matter Dynamics

scholarly journals Evaluating Coexistence of Fish Species with Coastal Cutthroat Trout in Low Order Streams of Western Oregon and Washington, USA

Fishes ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Kyle D. Martens ◽  
Jason Dunham
Keyword(s):  
Pacific Northwest ◽  
Species Interactions ◽  
Coho Salmon ◽  
Cutthroat Trout ◽  
Single Species ◽  
The Pacific ◽  
Small Streams ◽  
Coastal Cutthroat Trout ◽  
Multiple Species ◽  
Low Order

When multiple species of fish coexist there are a host of potential ways through which they may interact, yet there is often a strong focus on studies of single species without considering these interactions. For example, many studies of forestry–stream interactions in the Pacific Northwest have focused solely on the most prevalent species: Coastal cutthroat trout. To examine the potential for interactions of other fishes with coastal cutthroat trout, we conducted an analysis of 281 sites in low order streams located on Washington’s Olympic Peninsula and along the central Oregon coast. Coastal cutthroat trout and juvenile coho salmon were the most commonly found salmonid species within these streams and exhibited positive associations with each other for both presence and density. Steelhead were negatively associated with the presence of coastal cutthroat trout as well as with coho salmon and sculpins (Cottidae). Coastal cutthroat trout most frequently shared streams with juvenile coho salmon. For densities of these co-occurring species, associations between these two species were relatively weak compared to the strong influences of physical stream conditions (size and gradient), suggesting that physical conditions may have more of an influence on density than species interactions. Collectively, our analysis, along with a review of findings from prior field and laboratory studies, suggests that the net effect of interactions between coastal cutthroat trout and coho salmon do not appear to inhibit their presence or densities in small streams along the Pacific Northwest.

The Distribution of Tree Roots in Douglas-fir Forests in the Pacific Northwest in Relation to Depth, Space, Coarse Organic Matter and Mineral Fragments

2017 ◽  
Vol 91 (4) ◽  
pp. 326-343 ◽  
Author(s):  
Constance A. Harrington ◽  
Scott M. Holub ◽  
Cici Bauer ◽  
E. Ashley Steel
Keyword(s):  
Organic Matter ◽  
Pacific Northwest ◽  
Douglas Fir ◽  
Tree Roots ◽  
The Pacific

Decomposition of wood stakes in the Pacific Northwest after soil compaction and organic matter removal

2021 ◽  
Vol 494 ◽  
pp. 119362
Author(s):  
Deborah S. Page-Dumroese ◽  
Martin F. Jurgensen ◽  
Chris A. Miller ◽  
Matt D. Busse ◽  
Michael P. Curran ◽  
...  
Keyword(s):  
Organic Matter ◽  
Pacific Northwest ◽  
Soil Compaction ◽  
Organic Matter Removal ◽  
The Pacific

Riparian forest harvesting and its influence on benthic communities of small streams of sub-boreal British Columbia

2007 ◽  
Vol 37 (5) ◽  
pp. 907-918 ◽  
Author(s):  
K. Jill Melody ◽  
John S. Richardson
Keyword(s):  
Leaf Litter ◽  
Pacific Northwest ◽  
Riparian Forest ◽  
Benthic Communities ◽  
Forest Harvesting ◽  
Riparian Areas ◽  
The Pacific ◽  
Small Streams ◽  
Coastal Streams ◽  
Physical Features

Forest harvesting in riparian areas can alter the leaf-litter inputs, shading, and stability of small streams, and many of the details of these impacts are known for coastal streams of the Pacific Northwest. However, little is known about how small streams in the drier, continental areas of western North America respond to logging. We conducted a study of paired stream reaches (comparing one recently harvested (≤3 years) reach and two upstream, forested reaches in each of five streams) in which periphyton, detritus, macroinvertebrate abundance and biomass, and physical features were measured in summer and autumn. In general, recently harvested stream sections tended to be wider and contained more riffle areas than the upstream forested sections. The amounts of leaf litter and algae varied among streams and were not consistently greater or lesser in the forested sections than in the harvested sections. Though the variation in amounts within streams was mainly seasonal, amounts differed more among streams than between pairs of harvested and forested reaches. The communities of benthic invertebrates differed significantly between forested and harvested reaches, but often in opposite directions between streams. The magnitude and direction of differences observed between treatments, streams, or seasons were associated with the specific stream and the method of riparian harvesting used.

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