Stable isotopes reveal seasonal competition for resources between late Pleistocene bison (Bison) and horse (Equus) from Rancho La Brea, southern California
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چکیده
Article history: Determining how organis Received 18 July 2008 Received in revised form 30 September 2008 Accepted 12 October 2008
منابع مشابه
Paleoecological and Taphonomic Implications of Insect-Damaged Pleistocene Vertebrate Remains from Rancho La Brea, Southern California
The La Brea Tar Pits, the world's richest and most important Late Pleistocene fossil locality, offers unsurpassed insights into southern California's past environments. Recent studies at Rancho La Brea document that insects serve as sensitive and valuable paleoecological and taphonomic indicators. Of the thousands of fossil bird and mammal bones recovered from the Tar Pits, insect trace damage ...
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We sampled 143 individuals from Rancho La Brea (RLB) large faunal collections for bone collagen stable carbon (dC) and nitrogen (dN) isotope ratios. These collections were recovered from asphalt seeps in the Los Angeles Basin, California, USA, and date from f 40 to 12 ka. Our findings indicate that despite a slight reduction in collagen nitrogen content, RLB skeletal remains are relatively well...
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Stable oxygen isotopes from fossils, both vertebrate and invertebrate, or inorganic sedimentary minerals frequently have been used to make interpretations about ancient global climates. Oxygen isotope values measured from terrestrial vertebrates or sedimentary carbonates provide information about paleotemperature and amounts of precipitation at a particular site. In general, these inferences ar...
متن کاملLeafcutter Bee Nests and Pupae from the Rancho La Brea Tar Pits of Southern California: Implications for Understanding the Paleoenvironment of the Late Pleistocene
The Rancho La Brea Tar Pits is the world's richest and most important Late Pleistocene fossil locality and best renowned for numerous fossil mammals and birds excavated over the past century. Less researched are insects, even though these specimens frequently serve as the most valuable paleoenvironemental indicators due to their narrow climate restrictions and life cycles. Our goal was to exami...
متن کاملLate Pleistocene C4 Plant Dominance and Summer Rainfall in the Southwestern United States from Isotopic Study of Herbivore Teeth
Patterns of climate and C4 plant abundance in the southwestern United States during the last glaciation were evaluated from isotopic study of herbivore tooth enamel. Enamel dC values revealed a substantial eastward increase in C4 plant consumption for Mammuthus spp., Bison spp., Equus spp., and Camelops spp. The dC values were greatest in Bison spp. (26.9 to 11.7‰) and Mammuthus spp. (29.0 to 1...
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تاریخ انتشار 2008