Reconstructing the migration patterns of late Pleistocene mammals from northern Florida, USA
نویسندگان
چکیده
We used analyses of the strontium isotope (Sr/Sr) ratios of tooth enamel to reconstruct the migration patterns of fossil mammals collected along the Aucilla River in northern Florida. Specimens date to the late-glacial period and before the last glacial maximum (pre-LGM). Deer and tapir displayed low Sr/Sr ratios that were similar to the ratios of Florida environments, which suggest that these taxa did not migrate long distance outside of the Florida region. Mastodons, mammoths, and equids all displayed a wide range of Sr/Sr ratios. Some individuals in each taxon displayed low Sr/Sr ratios that suggest they ranged locally, while other animals had high Sr/Sr ratios that suggest they migrated long distances (N150 km) outside of the Florida region. Mastodons were the only taxa from this region that provided enough well-dated specimens to compare changes in migration patterns over time. Pre-LGM mastodons displayed significantly lower Sr/Sr ratios than late-glacial mastodons, which suggests that late-glacial mastodons from Florida migrated longer distances than their earlier counterparts. This change in movement patterns reflects temporal changes in regional vegetation patterns. © 2007 University of Washington. All rights reserved.
منابع مشابه
Transcervical Migration of an Essure® Coil
Introduction: Essure® device malposition is a rare, but clinically significant complication, for which management is idiosyncratic. This case report describes an unusual example of Essure® migration in order to clarify reasonable management options. Case Presentation: A 50-year old G4P2022 underwent hysteroscopi...
متن کاملThe isotopic ecology of late Pleistocene mammals in North America Part 1. Florida
Mammoths and mastodons are common in Pleistocene deposits, yet these proboscideans and many other animals disappeared suddenly f10,000 years ago. In this study, we reconstruct the diets of proboscideans and associated mammals through isotopic analysis of carbonate in tooth enamel apatite in order to test nutritional hypotheses for late Pleistocene Ž . Ž extinction. We analyzed specimens from si...
متن کاملLate Pleistocene fishes of the Tennessee River Basin: an analysis of a late Pleistocene freshwater fish fauna from Bell Cave (site ACb-2) in Colbert County, Alabama, USA.
The Tennessee River Basin is considered one of the most important regions for freshwater biodiversity anywhere on the globe. The Tennessee River Basin currently includes populations of at least half of the described contemporary diversity of extant North American freshwater fishes, crayfish, mussel, and gastropod species. However, comparatively little is known about the biodiversity of this bas...
متن کاملExplaining the Presence of Narrow-faced Bladelet Cores in Izeh Chipped Stone Assemblages and its relation to Population/Idea Movements in Late Pleistocene
Abstract: Several models of population/culture movements have been proposed based on bladelet production in Late Pleistocene of Eurasia. Narrow-faced bladelet/microblade cores, also known as "wedge shaped" cores in Central Asia and Far East studies, have been considered as a component of an inter-continent migration of people and idea which originated in Sibero-Mongolian region Upper Paleolithi...
متن کاملExtinct Beringian wolf morphotype found in the continental U.S. has implications for wolf migration and evolution
Pleistocene diversity was much higher than today, for example there were three distinct wolf morphotypes (dire, gray, Beringian) in North America versus one today (gray). Previous fossil evidence suggested that these three groups overlapped ecologically, but split the landscape geographically. The Natural Trap Cave (NTC) fossil site in Wyoming, USA is an ideally placed late Pleistocene site to ...
متن کامل