Student Activity: Predators in Control

Predator–prey relationships are one of the most important biotic relationships in the sustainability of an ecosystem. Predators are the natural controls in an ecosystem, limiting the size of a prey population. Many studies have illustrated that the long-term sustainability of an ecosystem is severely affected if top predators are eliminated. Prey populations increase as a result of the loss of their natural predators and they overgraze the vegetation resulting in ecosystem collapse.

Top predators―including wolves, grizzly bears, sea otters, and alligators―are referred to as keystone species. They are crucial in maintaining and sustaining ecosystem function. For example, on the west coast of Canada the loss of sea otters, a keystone species, has led to an increase in populations of sea urchins and other shellfish which are overgrazing on the underwater kelp forests and destroying the habitat of many different organisms.

This game models the interrelated effects of predator (fox) and prey (rabbit) populations over several generations.

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TeachOntario Talks: Using a Learner-Centred Cla… | TeachOntario

In this installment of the TeachOntario Talks, we are profiling and celebrating the work of secondary teacher Kendra Spira and her colleagues at Erin District High School in the Upper Grand District School Board. Spira has created a learner-centred classroom that uses technology tools to help deepen student learning. With only about 500 students, Erin District High School may be small in stature, but what it lacks in size, it makes up for in caliber. The school is one of the Upper Grand District School Board’s leading schools, ranked in the top 10% of Ontario secondary schools in the Fraser Institute School Rankings. This is due, in part, to the sheer scope of programs it offers, from a champion athletics program, to a renowned French Immersion program, to a thriving Drama department, to a plethora of clubs and activities for students to join.

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Source: TeachOntario Talks: Using a Learner-Centred Cla… | TeachOntario