Riparian Forest and Urban Hydrology Influences on Stream Channel Morphology: Implications for Restoration

2001 ◽  
Author(s):  
W. Cully Hession
Keyword(s):  
Riparian Forest ◽  
Channel Morphology ◽  
Urban Hydrology ◽  
Stream Channel

A remote sensing based methodology of delineating stream channel morphology

2008 ◽  
Author(s):  
Mansoor Delali Leh ◽  
Sreekala Gopalapillai Bajwa ◽  
Indrajeet Chaubey ◽  
Jackson Cothren
Keyword(s):  
Remote Sensing ◽  
Channel Morphology ◽  
Stream Channel

scholarly journals Quantifying variability in stream channel morphology

2003 ◽  
Vol 39 (9) ◽  
Author(s):  
Kristie Trainor ◽  
Michael Church
Keyword(s):  
Channel Morphology ◽  
Stream Channel

Ecological impacts on aquatic macroinvertebrates following upland stream invasion by a ponded pasture grass (Glyceria maxima) in southern Australia

2004 ◽  
Vol 55 (7) ◽  
pp. 709 ◽  
Author(s):  
Amber Clarke ◽  
P. S. Lake ◽  
Dennis J. O'Dowd
Keyword(s):  
Ecosystem Engineer ◽  
High Capacity ◽  
Ecosystem Processes ◽  
Channel Morphology ◽  
Ecological Impacts ◽  
Freshwater Wetlands ◽  
Stream Channel ◽  
Pasture Grass ◽  
Functional Feeding Group ◽  
Sediment Matrix

Glyceria maxima (Reed sweet-grass), an emergent aquatic grass native to Eurasia, has naturalised in North America, New Zealand and southern Australia. Introduced as a ponded pasture species, it threatens native biodiversity and ecosystem processes in freshwater wetlands and waterways. We compared paired sections, either invaded or not invaded by G. maxima, of three upland streams in Gippsland, Victoria, Australia to infer its impacts on macroinvertebrate abundance, morphospecies density, and morphospecies and functional feeding group (FFG) composition. Its potential effects in altering sedimentation were explored by comparing stream channel morphology in paired stream sections at one site. Invasion by G. maxima appears to drive changes in macroinvertebrate morphospecies composition and FFG composition, reducing a diverse array of macroinvertebrates to a more uniform fauna. The estimated volume of plant/sediment matrix in a 50 m invaded stream section was around 1100 m3, nearly 15-fold greater than in an adjacent uninvaded stream section. Glyceria maxima is an autogenic ecosystem engineer, with the ability to convert sections of fast-flowing aerobic streams into partially anaerobic swamps. By generating a root-mat swamp with a high capacity to process nutrients, G. maxima may facilitate its own growth and spread, as well as that of secondary invaders.

The impacts of ski slope development on stream channel morphology in the White River National Forest, Colorado, USA

Geomorphology ◽  
2009 ◽  
Vol 103 (3) ◽  
pp. 375-388 ◽  
Author(s):  
Gabrielle C.L. David ◽  
Brian P. Bledsoe ◽  
David M. Merritt ◽  
Ellen Wohl
Keyword(s):  
Channel Morphology ◽  
National Forest ◽  
Stream Channel ◽  
White River

scholarly journals Stable isotope analyses of web-spinning spider assemblages along a headwater stream in Puerto Rico

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1324 ◽  
Author(s):  
Sean P. Kelly ◽  
Elvira Cuevas ◽  
Alonso Ramírez
Keyword(s):  
Puerto Rico ◽  
Stable Isotope ◽  
Aquatic Insects ◽  
Riparian Forest ◽  
Headwater Stream ◽  
Stream Channel ◽  
Stream Channels ◽  
Stable Isotope Analyses ◽  
Terrestrial Insects ◽  
Isotope Analyses

Web-spinning spiders that inhabit stream channels are considered specialists of aquatic ecosystems and are major consumers of emerging aquatic insects, while other spider taxa are more commonly found in riparian forests and as a result may consume more terrestrial insects. To determine if there was a difference in spider taxa abundance between riverine web-spinning spider assemblages within the stream channel and the assemblages 10 m into the riparian forest, we compared abundances for all web-spinning spiders along a headwater stream in El Yunque National Forest in northeast Puerto Rico. By using a nonmetric dimensional scaling (NMDS) abundance analysis we were able to see a clear separation of the two spider assemblages. The second objective of the study was to determine if aquatic insects contributed more to the diet of the spider assemblages closest to the stream channel and therefore stable isotope analyses ofδ15N andδ13C for web-spinning spiders along with their possible prey were utilized. The results of the Bayesian mixing model (SIAR) however showed little difference in the diets of riverine (0 m), riparian (10 m) and upland (25 m) spiders. We found that aquatic insects made up ∼50% of the diet for web-spinning spiders collected at 0 m, 10 m, and 25 m from the stream. This study highlights the importance of aquatic insects as a food source for web-spinning spiders despite the taxonomic differences in assemblages at different distances from the stream.

Implications of legacy watershed disturbances for channel structure and salmon habitat availability under different low-flow levels: an analysis of 45 years of discharge–habitat relationships at Carnation Creek, British Columbia

2020 ◽  
Vol 77 (11) ◽  
pp. 1780-1793
Author(s):  
David A. Reid ◽  
Robin Pike ◽  
Stephen Bird ◽  
Peter Tschaplinski ◽  
David Wilford
Keyword(s):  
British Columbia ◽  
Coho Salmon ◽  
Aquatic Organisms ◽  
Channel Morphology ◽  
Channel Structure ◽  
Low Flow ◽  
Habitat Availability ◽  
Stream Channel ◽  
Ecological Requirements ◽  
Trade Offs

In streams where water availability is limited, conservative flow ranges are often adopted by water managers to ensure that streamflow is available to meet the ecological requirements of aquatic organisms. However, a variety of natural and anthropogenic disturbances can influence stream channel morphology and in-stream wood characteristics through time, potentially altering the availability of habitat at a given flow level. Using a 2D hydrodynamic modelling approach incorporating 45 years of detailed channel morphology data from Carnation Creek, British Columbia, this paper examines relationships between legacy (forestry-driven) watershed disturbance, changes to channel morphology, and habitat availability for juvenile coho salmon (Oncorhynchus kisutch) under nine flow levels. Results indicate that substantial variability in the abundance of salmonid habitat is present through time, even when modelled flow levels are held constant. Additionally, trade-offs were observed between availability of habitat types as discharge increased. Finally, modelling results indicate that habitat availability is reduced following historical harvesting. These findings suggest that legacy watershed disturbances affecting stream channel form and function are worth considering when allocating streamflow.

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