Lake Simcoe Science Newsletters
A series of newsletters written by LSRCA science and monitoring staff. Each volume focuses on the numerous factors that impact the health of Lake Simcoe and its watershed based on the monitoring data we collect and analyze.
There is no one cause and no one solution to managing the health of Lake Simcoe, but it begins with an integrated approach to managing the entire Lake Simcoe watershed. The watershed is a complex and dynamic system that changes over time in response to both human activities and natural events.
Volume 12, Mussel Loss, Mussel Gain
In this issue: We examine how the invasive mussel population has shifted from a predominately zebra mussel population to predominately quagga mussels and what the implications may be for Lake Simcoe.
Volume 11, Applying Innovation to Phosphorus Monitoring
In this issue: In a pilot project initiated in 2011, LSRCA installed four turbidity probes at test locations throughout the watershed to evaluate the effectiveness of using turbidity to measure phosphorus.
Volume 10, Benthic Macroinvertebrates
In this issue: The presence of different bugs in the Lake Simcoe watershed can tell us a lot about its health. We collect, identify and translate the stories and learnings from the microscopic bugs we find living in deep in the mud of our rivers and streams. Knowing the tolerances of these species can tell us a lot about the environmental conditions in which they were found.
Volume 9, Groundwater Recharge
In this issue: Groundwater serves as a primary drinking water source in our watershed and plays an important ecological role. It supports the health and well-being of many natural systems that contribute to a healthy watershed, such as wetlands, rivers and streams.
Volume 8, Sodium Chloride (Winter Salt)
In this issue: Winter salt is one of the more common de-icers used on roads, highways, parking lots, driveways and sidewalks. Excess salt disrupts freshwater ecosystems, contaminates drinking water supplies, kills vegetation, disturbs wildlife and damages urban infrastructure. Nearly all watershed monitoring stations show an increasing trend in chloride concentrations over the long term, indicating the widespread increase in winter salt application.
Volume 7, Low Impact Development (LID)
In this issue: When land is developed the natural water cycle is changed. More hard surfaces (pavement) increase runoff and prevents rain and snow from infiltrating into the ground. As communities continue to grow LSRCA is exploring alternative strategies to manage stormwater runoff in a more sustainable manner.
Volume 6, The Phosphorus Cycle
In this issue: We've published many reports and studies on our research about how much phosphorus is going into Lake Simcoe. In this article, we take a look at phosphorus from another perspective - from within the lake itself.
Volume 5, Local Perspective on Climate Change
In this issue: Climate change is considered to be one of the most pressing global environmental and humanitarian issues of our time. But what is global is also local. In the Lake Simcoe watershed, we are seeing variation and changes to our regional climate.
Volume 4, Stream Flow
In this issue: As part of the natural water cycle, rivers play an important role in the health and function of our watershed. When it rains, water moves across the landscape into the river. We monitor and measure changes in stream flow resulting from urbanization by comparing how streams respond in different landscapes.
Volume 3, A Fish Tale
In this issue: The biodiversity of fish species at a site tells us how healthy that section of stream is. Using a scientific tool known as an Index of Biological Integrity (IBI) we assign a health score and compare various stream systems within the watershed as well as track changes at sites over time.
Volume 2, Invasive Mussels
In this issue: In the past 200 years close to 150 species of foreign plants and animals have established themselves in the Great Lakes Region. A couple of the most well-known invasive species in Lake Simcoe are Zebra mussels and Quagga mussels.
Volume 1, Aquatic Plants
In this issue: Aquatic plants supply life-giving qualities to a lake by providing important shelter, food and nursery areas for fish, and by helping to trap sediments. When a lake receives an increased amount of nutrients such as phosphorus, aquatic plants may begin to grow in over-abundance and become a nuisance. An even bigger problem is when the plants decay and use up the oxygen that is vital to the survival of fish.