VOLUME 1: Table of Contents
TEACHING ISSUES AND EXPERIMENTS IN ECOLOGY
TEACHING
ALL VOLUMES
SUBMIT WORK
SEARCH
Figure Set 1: How have humans altered the global N cycle?
Purpose: Help students grasp the large-scale anthropogenic changes to global N cycling.
Teaching Approach: "write before discussion"
Cognitive Skills: (see
Bloom's Taxonomy) — comprehension, interpretation, analysis
Student Assessment: Replot the data
FIGURE SET 1
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Figure 1. Anthropogenic fixation of N in terrestrial ecosystems over time compared to estimates of natural biological
fixation on land. From Vitousek et al. 1997. Human alteration of the global nitrogen cycle: sources and consequences. Ecological
Applications 7: 737-750 and Vitousek et al. 1997. Human alteration of the global nitrogen cycle: causes and consequences.
Issues in Ecology 1: 1-15.
For help, see the essay "Helping Your Students to Interpret Figures and Tables."
Figure 1. Anthropogenic fixation of N in terrestrial ecosystems over time compared to estimates of natural biological fixation on land. From Vitousek et al. 1997. Human alteration of the global nitrogen cycle: sources and consequences. Ecological Applications 7: 737-750 and Vitousek et al. 1997. Human alteration of the global nitrogen cycle: causes and consequences. Issues in Ecology 1: 1-15.
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