. A Cumulative biological assessment of macroinvertebrate sites in the Custer National Forest Ashland Ranger District [electronic resource] : a report to the Custer National Forest, Ashland Ranger District. Custer National Forest (Mont. and S. D. ); Research natural areas; Invertebrates. Site Descriptions Cow Creek below the Reservoir- Fraxinus pennsylvanica/Prunus virginiana riparian community as well as a Carex nebrascensis (grazing dis-climax type) (Photo at right looking downstream). This site has ecological potential to recover if cattle exclusion occurs. Many of the reference indicator m
. A Cumulative biological assessment of macroinvertebrate sites in the Custer National Forest Ashland Ranger District [electronic resource] : a report to the Custer National Forest, Ashland Ranger District. Custer National Forest (Mont. and S. D. ); Research natural areas; Invertebrates. Site Descriptions Cow Creek below the Reservoir- Fraxinus pennsylvanica/Prunus virginiana riparian community as well as a Carex nebrascensis (grazing dis-climax type) (Photo at right looking downstream). This site has ecological potential to recover if cattle exclusion occurs. Many of the reference indicator macroinvertebrate taxa consistent with upstream Cow Creek are present in low numbers, but so are many tolerant taxa in the cattle-hummocked areas. Cow Creek below the Reservoir (New Beaver Ponded Areas)-(Photo looking upstream). This site had a high % of recent macroinvertebrate colonizers (Corixids, backswimmer waterbugs: Notonecta, Aedes sp. mosquito larvae and the pioneering Hydrophilidae and Dytiscidae beetles: Hydroporus, Berosus, Oreodytes) and thus, did not score well with the metrics, as many of these are tolerant taxa also found in the cattle-hummocked areas. The ecological potential of this site as an amphibian breeding area is great, but not advantageous for lotic macroinvertebrate communities as it transitions to a lentic ponded site. Parrish Spring trib to Poker Jim Reservoir Single thread channel in with good habitat integrity, mostly clean gravel/cobble substrate and a high proportion of the Spring Reference Condition Indicator species present, reference class integrity. No amphibians or reptiles were reported here or in any other single thread, non cattle- hummocked stream Stocker Branch Beaver Introduction Area - A macroinvertebrate sample taken here in 2008 contained a fairly depauperate macroinvertebrate community (12 taxa). The macroinvertebrate community is typical of newly colonized stock ponds, as well as some sharing taxa of perennial spring sites that ar
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