In May, 2018, the Colorado Natural Heritage Program (CNHP) and several other organizations descen... more In May, 2018, the Colorado Natural Heritage Program (CNHP) and several other organizations descended upon the Powers Ranch for a week-long baseline ecological inventory centered around improving the ecological condition of Rifle Creek and its riparian area. We’ve provided a brief overview of our findings, recommended next steps for riparian area restoration, and appendices with more detailed information on field methods, results, and plant species for restoration.
Heinold, Brian D., Gill, Brian A., Kondratieff, Boris C. (2013): Recent Collection And Dna Barcod... more Heinold, Brian D., Gill, Brian A., Kondratieff, Boris C. (2013): Recent Collection And Dna Barcode Of The Rare Coffee Pot Snowfly Capnia Nelsoni (Plecoptera: Capniidae). Illiesia 9 (2): 14-17
Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for st... more Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for stream biomonitoring and ecological studies; however, these methods are time consuming, expensive, and require taxonomic expertise. Estimating larval densities through collection of post-emergent exuvia can be a practical and time efficient alternative. We evaluated the use of multiple pass depletion techniques of the post-emergent exuvia of Pteronarcys californica to estimate larval densities at ten sites in three Colorado rivers. Exuvia density was highly correlated with both final-instar larval density (R2 = 0.90) and total larval density (R2 = 0.88) and the multiple pass removal technique performed well. Exuvia surveys found P. californica at three low density sites where benthic sampling failed to detect it. At moderate and high density sites the exuvia surveys always produced lower density estimates than benthic surveys. Multiple pass depletion estimates of exuvia proved to be an acc...
The Arapahoe Snowfly, Arsapnia arapahoe (Nelson & Kondratieff) was recently discovered in six dif... more The Arapahoe Snowfly, Arsapnia arapahoe (Nelson & Kondratieff) was recently discovered in six different first-order streams outside of the Cache la Poudre River Basin where it was previously considered endemic. Specimens of A. arapahoe were always collected in much lower relative abundance, 1.09% (±2.3SD), than other sympatric adult capniids. The first mitochondrial deoxyribonucleic acid (DNA) barcodes for A. arapahoe and A. coyote (Nelson & Baumann) are presented and compared with those of A. decepta. DNA barcoding was not able to differentiate between A. arapahoe and A.decepta Banks but it was able to indicate that A. coyote is specifically distinct.
History-In the early 1980s, the Northern Colorado Water Conservancy District (NCWCD) was granted ... more History-In the early 1980s, the Northern Colorado Water Conservancy District (NCWCD) was granted a permit to build Windy Gap Dam (WGD), the fifth of six mainstem impoundments constructed on major streams within upper Colorado River basin in Grand County during ...
Estimating densities of larval Salmonflies (Pteronarcys californica) through multiple pass 2 removal of post-emergent exuvia in Colorado rivers, Apr 11, 2020
Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for st... more Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for stream biomonitoring and ecological studies; however, these methods are time consuming, expensive, and require taxonomic expertise. Estimating larval densities through collection of post-emergent exuvia can be a practical and time efficient alternative. We evaluated the use of multiple pass depletion techniques of the post-emergent exuvia of Pteronarcys californica to estimate larval densities at ten sites in three Colorado rivers. Exuvia density was highly correlated with both final-instar larval density (R 2 = 0.90) and total larval density (R 2 = 0.88) and the multiple pass removal technique performed well. Exuvia surveys found P. californica at three low density sites where benthic sampling failed to detect it. At moderate and high density sites the exuvia surveys always produced lower density estimates than benthic surveys. Multiple pass depletion estimates of exuvia proved to be an a...
In May, 2018, the Colorado Natural Heritage Program (CNHP) and several other organizations descen... more In May, 2018, the Colorado Natural Heritage Program (CNHP) and several other organizations descended upon the Powers Ranch for a week-long baseline ecological inventory centered around improving the ecological condition of Rifle Creek and its riparian area. We’ve provided a brief overview of our findings, recommended next steps for riparian area restoration, and appendices with more detailed information on field methods, results, and plant species for restoration.
Heinold, Brian D., Gill, Brian A., Kondratieff, Boris C. (2013): Recent Collection And Dna Barcod... more Heinold, Brian D., Gill, Brian A., Kondratieff, Boris C. (2013): Recent Collection And Dna Barcode Of The Rare Coffee Pot Snowfly Capnia Nelsoni (Plecoptera: Capniidae). Illiesia 9 (2): 14-17
Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for st... more Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for stream biomonitoring and ecological studies; however, these methods are time consuming, expensive, and require taxonomic expertise. Estimating larval densities through collection of post-emergent exuvia can be a practical and time efficient alternative. We evaluated the use of multiple pass depletion techniques of the post-emergent exuvia of Pteronarcys californica to estimate larval densities at ten sites in three Colorado rivers. Exuvia density was highly correlated with both final-instar larval density (R2 = 0.90) and total larval density (R2 = 0.88) and the multiple pass removal technique performed well. Exuvia surveys found P. californica at three low density sites where benthic sampling failed to detect it. At moderate and high density sites the exuvia surveys always produced lower density estimates than benthic surveys. Multiple pass depletion estimates of exuvia proved to be an acc...
The Arapahoe Snowfly, Arsapnia arapahoe (Nelson & Kondratieff) was recently discovered in six dif... more The Arapahoe Snowfly, Arsapnia arapahoe (Nelson & Kondratieff) was recently discovered in six different first-order streams outside of the Cache la Poudre River Basin where it was previously considered endemic. Specimens of A. arapahoe were always collected in much lower relative abundance, 1.09% (±2.3SD), than other sympatric adult capniids. The first mitochondrial deoxyribonucleic acid (DNA) barcodes for A. arapahoe and A. coyote (Nelson & Baumann) are presented and compared with those of A. decepta. DNA barcoding was not able to differentiate between A. arapahoe and A.decepta Banks but it was able to indicate that A. coyote is specifically distinct.
History-In the early 1980s, the Northern Colorado Water Conservancy District (NCWCD) was granted ... more History-In the early 1980s, the Northern Colorado Water Conservancy District (NCWCD) was granted a permit to build Windy Gap Dam (WGD), the fifth of six mainstem impoundments constructed on major streams within upper Colorado River basin in Grand County during ...
Estimating densities of larval Salmonflies (Pteronarcys californica) through multiple pass 2 removal of post-emergent exuvia in Colorado rivers, Apr 11, 2020
Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for st... more Traditional methods of collecting and sorting benthic macroinvertebrate samples are useful for stream biomonitoring and ecological studies; however, these methods are time consuming, expensive, and require taxonomic expertise. Estimating larval densities through collection of post-emergent exuvia can be a practical and time efficient alternative. We evaluated the use of multiple pass depletion techniques of the post-emergent exuvia of Pteronarcys californica to estimate larval densities at ten sites in three Colorado rivers. Exuvia density was highly correlated with both final-instar larval density (R 2 = 0.90) and total larval density (R 2 = 0.88) and the multiple pass removal technique performed well. Exuvia surveys found P. californica at three low density sites where benthic sampling failed to detect it. At moderate and high density sites the exuvia surveys always produced lower density estimates than benthic surveys. Multiple pass depletion estimates of exuvia proved to be an a...
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We’ve provided a brief overview of our findings, recommended next steps for riparian area restoration, and appendices with more detailed information on field methods, results, and plant species for restoration.
We’ve provided a brief overview of our findings, recommended next steps for riparian area restoration, and appendices with more detailed information on field methods, results, and plant species for restoration.