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Effects of Intraspecific Competition on Plants
This lab exercise examines the effect of density on the survival and growth of plant populations. Students examine a variety of parameters in experimental populations of radish plants grown at different densities. They evaluate their findings against the Law of Final Constant Yield and the Reciprocal Yield Law. This exercise follows the Four Dimensional Ecology Education (4DEE) framework...
Publisher: EcoEd Digital Library |
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How do Lake Ecosystems Change with Increases in Dissolved Organic Matter (DOM) and Reduced Water Clarity? Long-term investigations in lake ecology
Water quality is a significant issue affecting our lakes. While the effects of nutrients on water quality has received much attention, light availability also has strong effects on water quality in lake ecosystems. Light availability has been changing in many lakes with changes in water clarity. Many lakes are undergoing “browning”, where waters become darker and less transparent due to increases...
Publisher: EcoEd Digital Library |
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A 4DEE Introduction to wetlands: Basic principles, online mapping, and field identification
This lesson focuses on basic principles and identification of wetlands, which are valuable and productive ecosystems in the landscape. It consists of two files that complement each other. This first is a Powerpoint presentation that provides basic principles about wetlands. The second is a set instructions for a laboratory in which students learn how to locate wetlands using online mapping,...
Publisher: EcoEd Digital Library |
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A Natural Process: Fostering Critical Thinking Through an Ecological Allegory
This exercise develops critical thinking and reading comprehension in an undergraduate ecology course. Students read and discuss an ecologically-based fictional narrative A Natural Process that promotes a critical analysis of the societal context of decision-making and interpretation of observations. The exercise aligns with Vision and Change’s Core Competency #5 Ability to Communicate and...
Publisher: EcoEd Digital Library |
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Year to year variability in survivorship for the summer annual Erucastrum gallicum
This figure shows survivorship curves for spring cohorts of the summer annual plant Erucastrum gallicum (Brassicaceae) growing in the Jamesville Quarry, Syracuse, NY. It shows how survivorship varies markedly from year to year, due mainly to variability in rainfall. Survivorship approximated a Deevey Type I function in 1976, a year with abundant rain. Survivorship followed a Type III pattern in...
Publisher: EcoEd Digital Library |
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