The impacts of century-old, arsenic-rich, mine tailings on multitrophic level biological assemblages in lakes from the Cobalt, Ontario, Canada region

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

Click here to download the PDF file.

Creator: 

Little, Amanda

Date: 

2019

Abstract: 

The combination of silver mining and lack of environmental regulations in the early 1900s resulted in a legacy of century-old, arsenic-rich mine tailings around Cobalt, Ontario, Canada. In order to examine the impacts that arsenic has had on aquatic ecosystems in the region, diatom, cladoceran, chironomid, and zooplankton assemblages from lakes along a gradient of surface water arsenic contamination (0.4 - 1,113 µg/L) were sampled. Our results show that present-day arsenic concentration is not a significant driver of biotic community change across the study lakes, suggesting that other variables are more important in the structuring of the biological community in this region. These results suggest that while legacy contamination has greatly increased arsenic concentration beyond the acceptable guideline for aquatic life (5 µg/L), variability in lake morphometry among the study lakes and other environmental factors appear more influential in the structuring of aquatic ecosystems in Cobalt, Ontario, Canada.

Subject: 

Geography
Environmental Sciences

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Science: 
M.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Geography

Parent Collection: 

Theses and Dissertations

Items in CURVE are protected by copyright, with all rights reserved, unless otherwise indicated. They are made available with permission from the author(s).