Question

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JP9
Open with e with Adilll
Vocabulary list (pick 15)
Nitrogen fixation
Nitrification
. Denitrification
Ammonification
Ammonia
. Nitrate
Nitrite
Legume (symbiotic N fixation)
Rhizobium
Nitrogen reservoir
Phosphorus cycle
Phosphate (PO4^3-)-write as PO in answers when needed
Weathering (as source of P)
Eutrophication
Runoff
Sedimentation
Fertilizer
Algal bloom
Biological uptake
Limiting nutrient

short vocabulary

Answer 1

e with Adilll

- Nitrogen fixation — conversion of N2 gas into biologically usable nitrogen (often NH3) by certain bacteria or lightning.
- Nitrification — microbial oxidation of ammonia to nitrite (NO2−) and then to nitrate (NO3−).
- Denitrification — microbial reduction of nitrate (NO3−) back to N2 gas, returning nitrogen to the atmosphere.
- Ammonification — decomposition of organic nitrogen into ammonia (NH3) or ammonium (NH4+).
- Ammonia — NH3, a reduced form of nitrogen produced by decomposition and fixation.
- Nitrate — NO3−, a soluble, plant-available form of nitrogen.
- Nitrite — NO2−, an intermediate in nitrification and denitrification; can be toxic at high levels.
- Legume (symbiotic N fixation) — plants (e.g., beans, peas) that host nitrogen-fixing bacteria in root nodules.
- Rhizobium — genus of bacteria that form symbiotic relationships with legumes to fix atmospheric N2.
- Phosphorus cycle — movement of phosphorus through rocks, soil, water, and organisms; lacks a gaseous phase.
- Phosphate (PO) — the biologically available form of phosphorus (written here as PO).
- Weathering (as source of P) — breakdown of rocks that releases phosphate into soils and waterways.
- Eutrophication — nutrient enrichment of aquatic systems leading to excessive plant/algal growth and oxygen decline.
- Algal bloom — rapid proliferation of algae in water, often from excess nutrients; can produce toxins and cause hypoxia.
- Limiting nutrient — the nutrient in shortest supply that restricts biological growth (commonly nitrogen or phosphorus).