AP BIOLOGY

Detailed explanation-1: -A particular golf course is using large amounts of nitrogen fertilizer. What process could move this nitrogen into a local stream? Nitrogen fixation processes nitrogen from which of the following sources?

Detailed explanation-2: -Most nitrogen enters ecosystems via certain kinds of bacteria in soil and plant roots that convert nitrogen gas into ammonia (NH3). This process is called nitrogen fixation. A very small amount of nitrogen is fixed via lightning interacting with the air.

Detailed explanation-3: -Five main processes cycle nitrogen through the biosphere, atmosphere, and geosphere: nitrogen fixation, nitrogen uptake through organismal growth, nitrogen mineralization through decay, nitrification, and denitrification.

Detailed explanation-4: -Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Four processes participate in the cycling of nitrogen through the biosphere: (1) nitrogen fixation, (2) decay, (3) nitrification, and (4) denitrification. Microorganisms play major roles in all four of these.

Detailed explanation-5: -Nitrogen is continuously recycled through plant and animal waste residues and soil organic matter. Nitrogen is removed from the soil by crops, gaseous loss, runoff, erosion and leaching. The magnitude and mechanism responsible for nitrogen losses depend upon the chemical and physical properties of a given soil.