If plants consume CO2 during photosynthesis, why hasn't all the atmospheric CO2 been used up?
-respiration produces CO2 as a product
-photosynthesis and respiration use one another's products as reactants
The spatioal and temporal distribution of photosynthesis is determined by _________________. Seasonal cycles of solar radiation are reflected in the CO2 content of the atmosphere. Lowest levels are during the autumn after summer photosynthesis. Greatest levels are in the Northern Hemisphere during the spring.
Which TWO of the following processes are typically associated with the short-term carbon cycle?
Recall the classic experiments that Charles Keelin performed at Mauna Loa (Figure 25.1) What did Keeling's research reveal about amospheric CO2 levels?
the atmospheric CO2 levels fluctuate seasonally
Recall that photosynthetic rates ramian relatively constant in regions near the equator. Imagine that tropical environments persisted throughout Earth's northern and southern hemispheres (i.e. Earth's entire climate mirrored that near the equator). If Keeling had collected his atmospheric CO2 data on such an Earth, what would you expect the Keeling Curve to look like?
A sinusoidal curve sloping upward (atmospheric CO2 levels fluctuate seasonally, but increase over time)
The _____ deals with geological processes and carbon reservoirs, some of which have been built up (or taken place) over a period of millennia. In contrast, the ______ involves biological processes that are carried out on a daily and/or seasonal basis.