List and describe the four major components of earth’s life support system.
what are five organization levels that serves as the focus for ecological study?
define the following terms: producers, consumers, herbivores, carnivores, omnivores, decomposers, detritivores, heterotrophs, food chains, food webs, pyramid of energy flow.
how is (gpp) measured?
what is the difference between (gpp) and (npp)?
what are the major processes of the water cycle?
what is the major reservoir for nitrogen? what is the percentage of chemically unreactive nitrogen gas volume that makes up of the atmosphere? define nitrogen fixation, denitrification, and nitrification.
what is the major reservoir of phosphorous? what is major limiting nutrient in freshwater and open ocean, respectively?
how have humans activities affected the sulfur cycle?
how do scientists learn about ecosystems?
list the three most productive ecosystems in terms of npp/yr (kcal/m2/yr) and total primary productivity?