A. C. Burke & Company

A.C. Burke & Company : A.C. Burke & Company Catalog : Nature & Environment : Ecology




	Clean Water, Clear Choices(Item #2256) When rainwater run-off carries fertilizers, chemicals, and litter into our waterways, the result is "non-point source pollution." This program from the National Assoc. of Conservation Districts explains the resulting threats to our environment and health, then shows what steps can be taken to solve the problem. VHS, 13 minutes. VIDEO Price: $19.95 (Excluding: California Sales Tax)


	Florida's Aquatic Plant Story(Item #2313) This program from the University of Florida describes the benefits of native aquatic plants to Florida's lakes and recounts problems caused by exotic "aquatic weeds" such as water hyacinth and hydrilla. It introduces the concept of maintenance control and explains the major methods of aquatic plant management, including herbicides, mechanical removal, and biological control such a fish and insects. VHS, 24 minutes. VIDEO Price: $29.95 (Excluding: California Sales Tax)


	Strangers in Our Waterways(Item #2272) When non-native aquatic species are introduced into our lakes and rivers the ecosystem may be affected in unpredictable ways. This program from Oregon State University illustrates how non-native fish and plants can enter our waterways, displacing or eliminating native species. Includes examples of scientific studies from across the U.S. VHS, 28 minutes. VIDEO Price: $39.95 (Excluding: California Sales Tax)


	The Wealth in Wetlands(Item #2255) Our wetlands are not only a habitat for wildlife, they also help to filter runoff water, contribute to flood control, and provide a spawning ground for fish. In this documentary farmers explain how they have benefited from maintaining or restoring the wetland areas on their farms. Produced by the U.S.D.A. in cooperation with the National Assoc. of Conservation Distr. VHS, 24 minutes. VIDEO Price: $19.95 (Excluding: California Sales Tax)


	What Makes a Quality Lake?(Item #2214) Dr. Daniel Canfield of the University of Florida presents an excellent introduction to the natural science of lake water quality. This program explains how natural and human factors can cause lake eutrophication (the nutrient enrichment of water) which in turn often impacts aquatic plant life and fish. Filmed in Florida, but contains information relevant to all lakes. VHS, 24 minutes. VIDEO Price: $29.95 (Excluding: California Sales Tax)