apes phosphorus hydrological cycle and primary productivity

phosphorous cycle

SAGMW: sedimentation, assimilation, geological uplift, mineralization, weathering

major reservoirs (phosphorus)

rocks and sediment

assimilation

plants and animals on land take up inorganic phosphate and take it into their tissue

mineralization

waste products and eventual corpses are decomposed and mineralize organic phosphorus into inorganic phosphate

sedimentation

phosphorus is not water soluble, so it collects as sediment in the ocean

geological uplift

the sediment collected from the ocean eventually is uplifted to become a mountain

weathering

mountains formed through geological uplift is weathered and eventually brought back to land and water

human impact on phosphorus cycle

• fertilizers containing phosphorus causing algae blooms due to runoff can cause toxins

• oxygen levels can turn abnormally low after an algae bloom and become a deadzone

• household detergents used to contain phosphorus and would cause blooms once the water was dumped

largest hydrologic reservoirs

oceans

transpiration

water released from plants leave into the atmosphere

precipitation

water vapor from evaporation and transpiration eventually cool and become clouds, which produce rain, snow, hail, etc

3 paths water can take after falling to land

1. evapotranspiration: evaporation and transpiration

2. absorption through soil, which is eventually percolated intro groundwater

3. runoff: into streams or rivers which eventually reach the ocean

human impact on hydrologic cycle

reducing biomass leading to less evapotranspiration, construction reducing percolation, diverting water sources

producers

autotrophs, produce glucose which is potential energy

cellular respiration

cells unlock energy from chemical compounds

herbivores

eat producers and gain energy stored inside them through cellular respiration

aerobic respiration

plants turn glucose and oxygen into energy, CO2, and water

anaerobic respiration

cells convert glucose into energy in the absence of oxygen

net effect of producers

producers photosynthesize more often than they respirate. they release O2 and store carbon in their tissues.

primary productivity

rate of converting solar energy into organic compounds

gross primary productivity

total amt of solar energy that producers in an ecosystem capture with photosynthesis

net primary productivity

gross primary productivity minus respiration

biomass

mass of all living things in an ecosystem

standing crop

how much biomass at a set time

how much solar energy is captured

1% GPP

how much solar energy is lost to respiration

60% of GPP

how much solar energy supports growth and reproduction

40% of GPP