Volume 6: Table of Contents
TEACHING ISSUES AND EXPERIMENTS IN ECOLOGY
Ecosystem Management | CO2 |
N2O |
CH4 |
Net GWP |
|||||
Soil C |
N Fertilizer |
Lime |
Fuel |
||||||
Conventional Agriculture | 0 |
27 |
23 |
16 |
52 |
-4 |
114 |
||
No-Till Agriculture | -110 |
27 |
34 |
12 |
56 |
-5 |
14 |
||
Organic Agriculture | -29 |
0 |
0 |
19 |
56 |
-5 |
41 |
||
Early Successional | -220 |
0 |
0 |
0 |
15 |
-6 |
-211 |
||
Late Successional Forest | 0 |
0 |
0 |
0 |
21 |
-25 |
-4 |
||
Table 5. Global warming potential (GWP), by greenhouse gas and by specific source of CO2, is shown for five different experimental ecosystems in a long-term ecological research (LTER) experiment in southwest Michigan. Each Ecosystem Management treatment was replicated six times on randomly selected one hectare plots. Positive numbers indicate net increase in global warming potential while negative numbers indicate a decrease in global warming potential. Annual crops were harvested for agricultural production while successional communities were left undisturbed, except for occasional burning of the Early Successional plots. This table is redrawn from Table 2 in Robertson et al. (2000), which is published in the journal 'Science.'