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4 results on '"Robert Progar"'

1. Contributors

Author

Nicole L. Achee, Arthur Agnello, Natasha M. Agramonte, Carmem Bernardi, Ulrich R. Bernier, Darren Blackford, Jeffrey Bloomquist, Rafael Borges, Adam Bowman, Scott P. Carroll, Stephen Clarke, Joel Coats, Caleb Corona, Mustapha Debboun, Matthew DeGennaro, Muhammad Farooq, Christopher Fettig, Gabe Foote, Stephen P. Frances, Larry I. Goodyer, Ulla Gordon, Elizabeth Graham, John P. Grieco, Shiyao Jiang, Amy L. Johnson, Cassandre H. Kaplinsky, Shawn B. King, Daniel L. Kline, Revilee Lake, Kenneth J. Linthicum, Agenor Mafra-Neto, Fredis Mappin, Xavier Martini, Karen McKenzie, James Meeker, Jason Moan, Sarah Jane Moore, Steve Munson, Edmund Norris, John Nowak, Kenneth L. O’Dell, Krijn Paaijmans, Steven T. Peper, Melynda K. Perry, Robert Progar, Whitney A. Qualls, Robert Renthal, Gary Richoux, Monique J. Rivera, Andreas Rose, Jesse Saroli, Rodrigo Silva, John P. Smith, Lukasz L. Stelinski, Johnson Kyeba Swai, Zainulabeuddin Syed, Mgeni Mohamed Tambwe, Farooq Tanveer, Ralph Washington, Colin Wong, Mark Wright, Rui-De Xue, and Liu Yang

Published
2022
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2. Aquatic Insect Emergence from Headwater Streams Flowing through Regeneration and Mature Forests in Western Oregon

Author

Robert Progar and Andrew R. Moldenke

Subjects
Canopy, Biomass (ecology), geography, geography.geographical_feature_category, Ecology, STREAMS, Aquatic Science, Biology, Abundance (ecology), Guild, Aquatic insect, Spring (hydrology), Species richness, Ecology, Evolution, Behavior and Systematics
Abstract

We examined the effect of canopy cover on adult aquatic insect emergence by collecting bi-weekly samples from twelve headwater stream reaches flowing either under a mature conifer canopy or streams flowing through ten-year-old regeneration in western Oregon from February to November 1997. Density and biomass generally followed a bimodal curve with peaks during early spring and sununer. Richness was unimodally distributed across time, peaking during mid-season, when abundance began to decline. However, there was a trend showing that headwater streams flowing through young forest supported 1.5-fold-higher insect density and biomass than streams flowing through mature forest (response confined primarily to Diptera). Many families of Diptera were indicators of open-canopy, whereas very few Ephemeroptera, Plecoptera, and Trichoptera (EPT) genera were indicators of either open or closed canopy. The proportional guild and ordinal composition of both density and biomass of the EPT guilds showed few diffe...

Published
2009
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