Thesis (M. Sc. (Zoology)) -- University of the North, 1994 / Refer to the document

Includes bibliographical references

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The Tamaulipan Biotic Province (TBP) is an ecotonal community that has been characterized in the twentieth century as a mixture of plains, woodland, and desert-adapted mammalian taxa. Some authors have proposed that this heterogeneous mixture of animals is a result of human influence on the environment in the post-European contact period. Others have proposed that the characteristically disharmonious mixture of fauna has been present in south Texas since prehistory. By considering the presence of certain key taxa across the archaeological record of the area this thesis demonstrates that the fauna characteristic of the Tamaulipan Biotic Province can be followed back in time as far as the archaeological record allows. This work also provides complete lists of all vertebrate organisms present in the archaeological record of the area, organized by time period and also by archaeological site and citation.

The aim of the study was to examine if the benthos in a restored portion of a small lowland stream south of Linkoping differed from two non restored reference areas two years after restoration. The reference areas were one stretch downstream and one upstream stretches of the restored stream. The benthic invertebrates were collected using standardized kick sampling. In order to classify the communities and estimate any differences, three different indices were exercised. In addition rank-abundance curves and checklists were used to get a picture of species composition. The only index that showed a difference between areas was the Berger-Parker diversity index showing that the downstream reference stretch differed from the other two. None of the analyses showed that the restored area was different from the other two, probably due to too short a time since the restoration. To allow for the bottom substrate to develop and stabilize so that species can re-colonize the area.

The Tamaulipan Biotic Province (TBP) is an ecotonal community that has been characterized in the twentieth century as a mixture of plains, woodland, and desert-adapted mammalian taxa. Some authors have proposed that this heterogeneous mixture of animals is a result of human influence on the environment in the post-European contact period. Others have proposed that the characteristically disharmonious mixture of fauna has been present in south Texas since prehistory. By considering the presence of certain key taxa across the archaeological record of the area this thesis demonstrates that the fauna characteristic of the Tamaulipan Biotic Province can be followed back in time as far as the archaeological record allows. This work also provides complete lists of all vertebrate organisms present in the archaeological record of the area, organized by time period and also by archaeological site and citation.

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The occurrence of vertebrate fossils from the Ravenscrag Formation near Roche Perce, southeastern Saskatchewan, Canada, documents the presence of a large and diverse assemblage of early late Paleocene (approximately 58 million years) mammals. Previous studies of the Roche Perce localities have examined only a small portion of the fauna, with the vast majority of taxa remaining undescribed. The current research centers on the identification, description and, where appropriate, evolutionary relationships of these undescribed mammals. Significant discoveries, to date, include two new species of the rare viverravid carnivoran Raphictis, a new species of the phenacodontid condylarth Ectocion, a large collection of a probable new species of the semi-aquatic pantolestid Palaeosinopa, and only the second known occurrence of the predominantly European lipotyphlan Adapisorex in North America. This research provides an improved understanding of mammalian diversity and evolution in the northern part of the Western Interior during this important time interval. / Systematics and Evolution

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