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Scavenging Of Animal Carcasses By Gumaga Nigricula (Sericostomatidae, Trichoptera), An Apparent Herbivore, Stephanie M. Carlson, Pablo Rodriguez-Lozano, Hana Moidu, Robert A. Leidy
Scavenging Of Animal Carcasses By Gumaga Nigricula (Sericostomatidae, Trichoptera), An Apparent Herbivore, Stephanie M. Carlson, Pablo Rodriguez-Lozano, Hana Moidu, Robert A. Leidy
Western North American Naturalist
Caddisflies within the genus Gumaga are generally considered shredders (i.e., consumers of leaf litter) or grazers (i.e., consumers of algae). We report on observations of Gumaga nigricula scavenging animal carcasses within and adjacent to isolated pools along intermittent reaches of Coyote Creek, Santa Clara County, California, USA. In particular, during the summer of 2018, we observed G. nigricula scavenging fish carcasses within isolated pools as well as bits of flesh from the bones of a black-tailed deer (Odocoileus hemionus columbianus) deposited on the stream bank. To the best of our knowledge, our observations represent the first published record …
Predators As Agents Of Selection And Diversification, Jerald B. Johnson, Mark C. Belk
Predators As Agents Of Selection And Diversification, Jerald B. Johnson, Mark C. Belk
Faculty Publications
Predation is ubiquitous in nature and can be an important component of both ecological and evolutionary interactions. One of the most striking features of predators is how often they cause evolutionary diversification in natural systems. Here, we review several ways that this can occur, exploring empirical evidence and suggesting promising areas for future work. We also introduce several papers recently accepted in Diversity that demonstrate just how important and varied predation can be as an agent of natural selection. We conclude that there is still much to be done in this field, especially in areas where multiple predator species prey …
Population Genetics Of The Wyoming Endemic Phlox Pungens Dorn (Polemoniaceae), Katherine Waselkov, Mercedes Santiago, Bonnie Heidel, Mark H. Mayfield, Carolyn J. Ferguson
Population Genetics Of The Wyoming Endemic Phlox Pungens Dorn (Polemoniaceae), Katherine Waselkov, Mercedes Santiago, Bonnie Heidel, Mark H. Mayfield, Carolyn J. Ferguson
Western North American Naturalist
Phlox pungens is a rare taxon restricted to cold deserts in the Wyoming Basins Ecoregion of west-central Wyoming, with occurrences in both the Wind River Basin (from which it was originally described) and the Green River Basin (populations that have been characterized as a different “morph”). The population genetics of P. pungens was investigated using microsatellite markers developed for the genus. Four microsatellite loci were genotyped from a total of 200 individuals of P. pungens from 10 sites. Ploidy levels were also assessed using flow cytometry. Most sampled populations of P. pungens were tetraploid, but 2 populations in the Green …
Rapid Invasion By The Annual Grass Ventenata Dubia Into Protected-Area, Low-Elevation Sagebrush Steppe, Melissa Nicolli, Thomas J. Rodhouse, Devin S. Stucki, Matthew Shinderman
Rapid Invasion By The Annual Grass Ventenata Dubia Into Protected-Area, Low-Elevation Sagebrush Steppe, Melissa Nicolli, Thomas J. Rodhouse, Devin S. Stucki, Matthew Shinderman
Western North American Naturalist
Wiregrass (Ventenata dubia [Leers] Coss.), an annual grass from the Mediterranean region of North Africa and Eurasia that has aggressive invasion potential in many North American plant communities, has only recently been reported in low-elevation sagebrush steppe. We first encountered wiregrass in 2014 in the John Day Fossil Beds National Monument, a low-elevation steppe protected area in central Oregon. This discovery was incidental to formal vegetation monitoring that was initiated in the monument in 2009. We first encountered wiregrass in monitoring plots in 2016, and, from plot data, we documented rapid spread during 2017–2019. Wiregrass infestation increased within our …
Occurrence Of North American Porcupine (Erethizon Dorsatum) In The Black Hills, South Dakota, Lenora M. Dombro, Earl Perez-Foust, Daniel Roddy, Daryl E. Mergen, Robert A. Gitzen
Occurrence Of North American Porcupine (Erethizon Dorsatum) In The Black Hills, South Dakota, Lenora M. Dombro, Earl Perez-Foust, Daniel Roddy, Daryl E. Mergen, Robert A. Gitzen
Western North American Naturalist
During the twentieth century, the North American porcupine (Erethizon dorsatum) was common in the Black Hills of western South Dakota and northeastern Wyoming. However, the low number of recent observations in the region has led to concern that porcupine populations have declined. We conducted systematic surveys to assess porcupine occurrence at two hundred and sixty-three 1-ha sites in the Black Hills National Forest, Custer State Park, Jewel Cave National Monument, Mount Rushmore National Memorial, and Wind Cave National Park during 2016–2017. We observed no porcupines or recent feeding sign. We also noted few recent observations in information compiled …
Small-Bodied Fish Surveys Demonstrate Native Fish Dominance Over 300 Kilometers Of The Colorado River Through Grand Canyon, Arizona, Ron B. Kegerries, Brandon Albrecht, Mark C. Mckinstry, Ron J. Rogers, Richard A. Valdez, Adam L. Barkalow, Eliza I. Gilbert, Harrison E. Mohn, Brian Healy, Emily Omana Smith
Small-Bodied Fish Surveys Demonstrate Native Fish Dominance Over 300 Kilometers Of The Colorado River Through Grand Canyon, Arizona, Ron B. Kegerries, Brandon Albrecht, Mark C. Mckinstry, Ron J. Rogers, Richard A. Valdez, Adam L. Barkalow, Eliza I. Gilbert, Harrison E. Mohn, Brian Healy, Emily Omana Smith
Western North American Naturalist
The Colorado River in Grand Canyon is highly regulated, with hypolimnetic releases that are generally unfavorable for endemic native fishes. However, both long-term drought and changes in dam operations have led to changes in river conditions, including the addition of approximately 125 km of riverine environment due to the contraction of Lake Mead. Through sampling of small-bodied fish, we were able to describe the Grand Canyon fish community and define the current native fish distribution from near Bright Angel Creek downstream to Pearce Ferry. Beginning in 2014 and continuing through 2018, we sampled the fish community via seining and documented …
Dyslexia Beyond The Word: An Ecological Study Of Specific Reading Disorder, Benjamin T. Carter
Dyslexia Beyond The Word: An Ecological Study Of Specific Reading Disorder, Benjamin T. Carter
Theses and Dissertations
This dissertation discusses the effects of dyslexia on reading behavior and cognition. It does so by first outlining the overall incidence of dyslexia, providing current definitions, giving a history of scientific inquiry and discussing relevant contemporary research. Thirteen different analyses are then discussed (ten a priori and three post-hoc). Individuals with dyslexia were found to have increased fixation duration, first run dwell time, total dwell time, and refixation probability. The dyslexia group was also highly sensitive to lexical predictability. Within the reading network, the BOLD response was depressed in dyslexia during reading in the following regions: the left medial and …