Paleolimnology of selected Precambrian Shield lakes /

The analysis of fossil diatoms and Mallomonas assemblages in a 2.85 m sediment core revealed that a series of distinct floristic changes have occurred in the development of Found Lake, a small Shield lake in southern Ontario. Climatic and vegetational changes in the lake's watershed were closely associated with successional changes in the lake's biota. Nutrients released by the deciduous component of the Found Lake watershed appeared to be especially important in determining diatom and Mallomonas standing crop. The top 20 cm of sediment of 3 ,Shield lakes was then investigated using close interval (1 cm) analyses of diatoms, Mallomonas scales, pollen grains and sedimentary phosphorus. Found and Jake Lake are adjacent to Highway 60, whereas Delano Lake has been undisturbed and was used as a control. Dramatic changes in the diatom and Mallomonas communities were recorded in the Found and Jake Lake stratigraphies and could be closely associated with known historical events. Increased turbidity and nutrient enrichment were believed responsible for these successional changes. In addition, diatom and Mallomonas standing crop increased substantially following road construction in Found Lake's drainage basin. Meanwhile, no. sharp changes in diatom or Mallomonas communities were recorded in the recent sediments of the control (Delano) lake. The use£ulness o£ Synuracean scales as paleoindicators, as well as the importance o£ sectioning cores at close intervals during transition periods in a laker's development, was stressed.

Postcolonial entanglements of Power, Race, Class and Privilege in Child and Youth Care Work Within a Brazilian Favela

This research assesses the various aspects of Child and Youth Care (CYC) work and how relationships between child or youth and care provider are limited and constricted within greater political, social and historical contexts. Specifically, this research takes place internationally in Rio de Janeiro, Brazil within a favela (slum) and unveils the entangled and complex relationship that I, not only as an ethnographer, but also as a CYC worker had with the many young people that I encountered. It will address a variety of theories that demonstrate the potentials of reproducing oppressive relationships, and argue that it is imperative for CYC workers to critically reflect on the greater contexts in which their work is situated in order to gain forces with those young people whom they are attempting to serve.