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A recently completed study was a revision and re-description of the extinct California Turkey, Meleagris californica, coauthored with Dr. Other families of birds are also being prepared for detailed revisionary studies.My first work with the Rancho La Brea collections was when I was a graduate student at UCLA. De Santis Department of Earth & Environmental Sciences, Vanderbilt University, Nashville, TN Recent and current research is aimed at clarifying the dietary behavior of the carnivores from Rancho La Brea to evaluate potential extinction hypotheses. Fuller Department of Earth System Science Keck-CCAMS Group, University of California, Irvine, CA Our recent research is focused on the development of methods for asphalt removal from bone collagen for radiocarbon dating and stable isotope ratio analysis of Pleistocene fauna at Rancho La Brea.Recent studies include insect trace fossils in bone and wood, exquisite preservation of leafcutter bee nests and pupae, identification of previously undescribed plant galls and new methods to extract asphalt from insects for radiocarbon dating. Greg Mc Donald Regional Paleontologist for the Bureau of Land Management, Utah State Office, Salt lake City, UT My research focus at Rancho La Brea is on the giant ground sloths and trying to understand their paleoecology.I am also interested in the taphonomy of asphalt deposits and how Rancho La Brea compares to other similar deposits which preserve Pleistocene faunas, especially those in South America that also include ground sloths.

This research depends on historical or ancient information and citizen scientists are playing an increasing role in making such data available.

This project also involves La Brea curators and staff, and Dr. Stay up-to-date with this project on twitter at #La Brea Webs and on our blog Dr.

Emily Lindsey Assistant Curator & Excavation Site Director, La Brea Tar Pits & Museum My research integrates information from past and modern ecosystems to understand how Ice Age animals and environments functioned, how climate conditions and human actions intersect to drive extinctions, and to predict future ecological responses in the face of modern global change.

30,000 years ago, we will first reconstruct trophic interactions of the large to small mammals and vegetation from different time slices, allowing us to constrain the range of natural variability among species interactions.

We will then examine the stability of food webs to external perturbations, both simulated (e.g., targeted removal of a species vs.