Nut Cycles

Slide2: 

The Biogeochemical Cycles

Fig 4.5 Periodic table of the elements.: 

© 2003 John Wiley and Sons Publishers Fig 4.5 Periodic table of the elements.

Slide4: 

D. T. Krohne, General Ecology

Fig 4.6 Idealized diagram of the geologic cycle, which includes the tectonic, hydrologic, rock and biogeochemical cycles.: 

© 2003 John Wiley and Sons Publishers Fig 4.6 Idealized diagram of the geologic cycle, which includes the tectonic, hydrologic, rock and biogeochemical cycles.

Slide6: 

Modified from D. T. Krohne, General Ecology 15%/year CO2 & CH4

Fig 4.14 The Carbon Cycle.: 

© 2003 John Wiley and Sons Publishers Fig 4.14 The Carbon Cycle.

Fig 4.15 Idealized diagram illustrating photosynthesis for a green plant (tree) and generalized reaction.: 

© 2003 John Wiley and Sons Publishers Fig 4.15 Idealized diagram illustrating photosynthesis for a green plant (tree) and generalized reaction.

Fig 4.17 Global flux of carbon, 1850-1990.: 

© 2003 John Wiley and Sons Publishers Fig 4.17 Global flux of carbon, 1850-1990.

Slide10: 

Modified from D. T. Krohne, General Ecology 50% fertilizer (Bacteria)

Fig 4.19 The global nitrogen cycle.: 

© 2003 John Wiley and Sons Publishers Fig 4.19 The global nitrogen cycle.

Critical Thinking Issue – How are Human Activities Affecting the Nitrogen Cycle?: 

© 2003 John Wiley and Sons Publishers Critical Thinking Issue – How are Human Activities Affecting the Nitrogen Cycle? Increased nitric acid in soil: Leaching of magnesium and potassium Increased aluminum levels Plant root damage Changes in microbe communities Fish kills Eutrophication of water bodies Nitrates in drinking water Global effects on plant based CO2 uptake Effects of increased use of nitrogen fertilizer:

Slide13: 

D. T. Krohne, General Ecology D. T. Krohne, General Ecology Modified from D. T. Krohne, General Ecology Gaseous phase

Fig 4.20 The global phosphorus cycle.: 

© 2003 John Wiley and Sons Publishers Fig 4.20 The global phosphorus cycle.

Slide15: 

Ecosystems and the Gaia Hypothesis

Slide16: 

Ecosystem defined: a community of organisms and it’s corresponding abiotic environment through which matter cycles and energy flows Wide variation in ecosystems Boarders can be well defined or vague Can be natural or artificial, managed or wild Wide range in scale Common to all ecosystems: energy flow and cycling of matter

Slide18: 

Gaia Hypothesis(es) Life has greatly affected the planetary environment This alteration has allowed life to persist The Earth is a “super-organism” - Life controls the environment in a fashion that is equivalent to the way an organism controls its various systems Evolution?