Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Shape Evolution And Sexual Dimorphism In The Mandible Of The Dire Wolf, Canis Dirus, At Rancho La Brea, Alexandria L. Brannick
Shape Evolution And Sexual Dimorphism In The Mandible Of The Dire Wolf, Canis Dirus, At Rancho La Brea, Alexandria L. Brannick
Theses, Dissertations and Capstones
The Rancho La Brea tar pits are a classic fossil lagerstätten, famous for the deposition of episodic accumulations of large numbers of fossils over short intervals in the late Pleistocene. I analyzed 157 Canis dirus (dire wolf) hemi-mandibles from Rancho La Brea through a 2D landmark-based morphometric analysis to test for size and shape changes through time. I scored 16 landmarks on each mandible gathered from four pits of different ages: 61/67 (~13-14 thousand years ago [ka]), 13 (~17-18 ka), 2051 (~26 ka), and 91 (~28 ka). Analyses indicate size does change through time, and shares a broad correlation with …
Examining The Effects Of Liming On Gyrinophilus Porphyriticus With A Comparison Of Multiple Sampling Methods, Elise Marie Edwards
Examining The Effects Of Liming On Gyrinophilus Porphyriticus With A Comparison Of Multiple Sampling Methods, Elise Marie Edwards
Theses, Dissertations and Capstones
Environmental acidification is affecting stream-associated species around the globe. As a result, different management strategies have been implemented to deal with acidification resulting from acid rain and acid mine drainage. Adding limestone to streams attempts to reverse the effects of acidification. While liming increases the pH of many acidic environments, studies involving the effects of liming on different animal species have shown mixed results. In this study, I examined the effects of liming on Gyrinophilus porphyriticus (the Spring Salamander) abundance and I also determined the best method of detection for G. porphyriticus. From June 10th to September 1st 2013, I …