Inter-Habitat Variation in Benthic Community Structure, Function, and Organic Matter Storage in 3 Appalachian Headwater Streams

Angradi, Ted R.

doi:10.2307/1467432

Cited by 74 publications

(52 citation statements)

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“…Within a stream reach there are a range of abiotic and biotic processes which directly and indirectly shape invertebrates assemblage, resulting in high within-reach variability that can be greater than among-stream variation (Angradi 1996;Halwas et al 2005). In general, different habitats within a reach support different kinds of taxa and functional processes (Hawkins et al 1982;Logan and Brooker 1983;Huryn and Wallace 1987;Angradi 1996;Scullion et al 1982;Halwas et al 2005).…”

Section: Reach Levelmentioning

confidence: 99%

“…In general, different habitats within a reach support different kinds of taxa and functional processes (Hawkins et al 1982;Logan and Brooker 1983;Huryn and Wallace 1987;Angradi 1996;Scullion et al 1982;Halwas et al 2005). However, invertebrates assemblage, abundance and production are highly variable and strongly related to localized habitat features such as channel form, riparian land cover, disturbance and recovery.…”

Section: Reach Levelmentioning

confidence: 99%

“…Reach gradient is related to invertebrates assemblage through stream velocity and organic matter entrainment and retention. For example, filtering organisms with attachment structures are common in fast currents, while crawling shredders are more common in slow water habitat (Huryn and Wallace 1987;Angradi 1996). Stream geomorphology is also an important filter of assemblage.…”

Section: Reach Levelmentioning

confidence: 99%

“…Downed logs and large woody debris in streams alter the hydrology of a stream and the invertebrates assemblage structure and function (Wallace et al 1995;Johnson et al 2003). In streams with large amounts of downed logs and woody debris, associated debris damns and pools are rich in organic matter and can support high densities of invertebrates and different functional characteristics than plunge pools (Angradi 1996).…”

Section: Reach Levelmentioning

confidence: 99%

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Macroinvertebrates and Excessive Fine Sediment Conditions in Oregon Coastal Streams

Edwards¹

2000

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The Pacific Coastal ecoregion contains large tracts of economically important forestlands that also serve as critical stream habitat for endangered Salmonids. Excessive fine sediment deposition in streams of this region is a major environmental concern in the region but difficult to measure directly. The use of stream invertebrates to monitor fine sediment conditions in streams requires careful consideration of several important factors that complicate their use as bioindicators including high spatial and temporal variability and covariance with other environmental variables.To evaluate the use of stream invertebrates as bioindicators of excessive fine sediment, three hypotheses were tested. The first hypothesis was that invertebrates would be related to broad-scale climate variables (Chapter 2). The second hypothesis was that functional aspects of the invertebrate community would serve as useful indicators of excessive fine sediment condition. (Chapter 3). The third hypothesis was that invertebrates in streams with naturally high levels of sediment would be tolerant to fine sediment (<2 mm, Chapter 4). Hypotheses were tested using a temporal data set at two streams in western Oregon, spatial data from 214 sites across the Oregon Coast Range, and in-situ experiment conducted in streams with erosive or resistant geologies.In the temporal study, both invertebrate density and functional traits were iii Acknowledgements

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Section: Reach Levelmentioning

confidence: 99%

Section: Reach Levelmentioning

confidence: 99%

Section: Reach Levelmentioning

confidence: 99%

Section: Reach Levelmentioning

confidence: 99%

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Macroinvertebrates and Excessive Fine Sediment Conditions in Oregon Coastal Streams

Edwards¹

2000

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“…At this site we observed the highest proportion of shredders, which prefer forested to open floodplain due to higher detrital food resources (Arscott et al 2003), but the difference was insignificant low in comparison with the disturbed sites. We suppose that accumulation of LWD at impacted sites could represent a source of BOM, which shredders feed on (Huryn & Wallace 1987;Boulton & Lake 1992;Minshall et al 1992;Angradi 1996;Voelz & Ward 1996;Wallace et al 1999). …”

Section: Metricsmentioning

confidence: 99%

Caddisfly assemblages of high mountain streams (The High Tatra Mts, Slovakia) influenced by a major windstorm event

2013

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Hydrobiological research of high mountain streams in the High Tatras was carried out in [2009][2010]. We evaluated the influence of windstorm on caddisfly assemblages. To assess the influence of windstorm we focused on river morphology using the RHS method and evaluation of TAM, TOM and BOM (CPOM, FPOM, UFPOM) amount in seven streams. Site 1 was a control and the other six were disturbed by the windstorm in different ways. The most remarkable differences compared to the control site was in feeding structure at sites most affected by erosion. In these streams there was a noticeable dominance of predators from the family Rhyacophilidae (mainly Rhyacophila tristis; sites 3, 4, 5, 6) and a remarkable decrease of passive filter feeders (site 4, 5). Using Spearman coefficient we confirmed a positive correlation between the proportion of predators and amount of TAM caused by erosion of steep deforested slopes of windstorm affected sites. In contrast, we did not observe such an increase in the proportion of predators at site 7, which was affected by both windstorm and subsequently by fire. This might be explained by the shallow vee valley with no observed erosion, where this site is situated. We also found a negative correlation between predators and evenness, indicating unstable community structure clearing succesion in the streams disturbed by erosion, and a negative correlation between passive filter feeders and UFPOM. We found out that overhanging tree boughs and LWD had an influence on species composition. RHS was a useful tool in characterising the influence of hydromorphology on caddisfly assemblages.

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Influences of Woody Debris on Flow Patterns and Channel Morphology in a Low Energy, Sand-Bed Stream Reach

Mutz¹

2000

Internat. Rev. Hydrobiol.

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In lowland areas, such as the glacial landscapes of eastern Germany, sand‐bed streams are the most common stream type. They have low gradients and their hydrological regime is often subdued due to the frequent interruption by lakes. Very few is known about the influence of woody debris in these streams, since nearly all previous studies are from high‐gradient conditions, where streams have coarse bed sediments and harsh hydrological regimes. The research objectives of this study were first to assess the quasi‐natural quantity and quality of wood in a lowland sand‐bed stream and second to understand the influence of wood on the channel morphology and the flow patterns at base‐flow. The three‐dimensional stream bed relief was surveyed by electronic distance measurement. The position and the size of large woody debris was assessed by close‐up photography. An acoustic Doppler velocimeter was used to record the patterns of flow velocity and turbulence. Overlay and analysis of the spatial data was done using a Geographic Information System. The standing stock of wood was 1.9 m3 and 39 woody elements per 100 m2 of stream bed. The flow pattern was clearly controlled by the wood. Woody elements elevated above the stream bed deflected flow and locally caused strong secondary current, high turbulence, and scour of the stream bed at baseflow. Wood resting directly on the stream bed, which contributed the majority of the wood inside the bank‐full channel, determined the roughness of the stream bed. Near‐bed flow patterns observed were isolated roughness flow and wake interference flow, which was registered inside the accumulations of wood. 68% of the stream bed had shear stress above critical. Hence, the secondary morphological structures of the sand‐bed were controlled at base‐flow by the flow which was determined by the woody debris distribution.

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Inter-Habitat Variation in Benthic Community Structure, Function, and Organic Matter Storage in 3 Appalachian Headwater Streams

Cited by 74 publications

References 0 publications

Macroinvertebrates and Excessive Fine Sediment Conditions in Oregon Coastal Streams

Macroinvertebrates and Excessive Fine Sediment Conditions in Oregon Coastal Streams

Caddisfly assemblages of high mountain streams (The High Tatra Mts, Slovakia) influenced by a major windstorm event

Influences of Woody Debris on Flow Patterns and Channel Morphology in a Low Energy, Sand-Bed Stream Reach

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