Social and Behavioral Sciences Commons^™

Middle To Late Holocene Environmental Change And Human Impacts In Seasonally Dry Neotropical Forest Of Northwestern Costa Rica: Sedimentary Evidence From Six Lakes, Martin R. Arford

Doctoral Dissertations

This dissertation presents evidence of long-term changes in climate, fire, and vegetation in northwestern Costa Rica, as revealed by sediment profiles from lakes on the seasonally dry, lower Pacific slope of Miravalles volcano in Guanacaste province (10.7^o N, 85.2^o W). Sediment cores were recovered for pollen and charcoal analysis from six lakes formed by volcanic activity approximately 8200 years ago.

Six regional pollen zones were delineated based on changes in pollen and sediments, and dated by AMS radiocarbon determinations on macrofossils. The basal pollen zone (Zone 6, prior to 8000 cal yr BP) comprises elastic sediments that correspond …

Canada’S Cultural Media Policy And Newfoundland Music On The Radio: Local Identities And Global Implications, Sara Beth Keough

Doctoral Dissertations

As our access to information increases with the aid of communication technologies, there is concern about cultural homogenization. Ironically, however, in the face of globalization in the media, the local often becomes increasingly important. This study explores how Canada’s cultural policy toward the media, known as the Canadian Content regulations, has both local and global implications. I examine how Canadian Content regulations apply to radio, and how these radio regulations influence broadcasting in the St. John’s, Newfoundland radio market. Interviews with radio station personnel (e.g. DJs, program directors, music librarians) and radio listeners show that radio stations in St. John’s …

Late-Holocene Environmental History In The Northeastern Caribbean: Multi-Proxy Evidence From Two Small Lakes On The Southern Slope Of The Cordillera Central, Dominican Republic, Chad Steven Lane

Doctoral Dissertations

This dissertation presents multi-proxy evidence of paleoenvironmental change preserved in sediment records recovered from two lakes on the southern (Caribbean) slope of the Cordillera Central in the Dominican Republic: Laguna Castilla (18^o47'51" N, 70^o52'33" W, 976 m) and Laguna de Salvador (18^o47'45" N, 70^o53'13" W, 990 m).

The Castilla and Salvador sediment records contain evidence of prehistoric forest clearance and agriculture, including abundant maize pollen, dating back to around A.D. 1060. These pollen grains constitute the earliest evidence of maize agriculture from the interior of Hispaniola, and represent some of the earliest …