KEY CONCEPT Matter cycles in and out of an ecosystem.

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Presentation transcript:

KEY CONCEPT Matter cycles in and out of an ecosystem.

Elements essential for life also cycle through ecosystems. A biogeochemical cycle is the movement of a particular chemical through the biological and geological parts of an ecosystem.

Water cycles through the environment. The hydrologic, or water, cycle is the circular pathway of water on Earth. Organisms all have bodies made mostly of water. precipitation condensation transpiration evaporation water storage in ocean surface runoff lake groundwater seepage

Define the following terms: Precipitation Condensation Evaporation Transpiration Runoff Seepage (Infiltration)

Oxygen cycles indirectly through an ecosystem by the cycling of other nutrients. respiration carbon dioxide photosynthesis

Think about the processes of cellular respiration and photosynethsis What is the chemical reaction of photosynthesis? What is the chemical reaction of cellular respiration? Why are both a part of the oxygen cycle? Why would there be more carbon dioxide in the atmosphere if there were less plants on Earth?

Carbon is the building block of life. The carbon cycle moves carbon from the atmosphere, through the food web, and returns to the atmosphere. Carbon is emitted by the burning of fossil fuels. Some carbon is stored for long periods of time in areas called carbon sinks. fossil fuels photosynthesis carbon dioxide dissolved in water decomposition of organisms respiration carbon dioxide in air combustion

The Carbon Cycle is essential for life What is an organic compound? Why are cellular respiration and photosynthesis also part of the carbon cycle? What is a fossil fuel? What happens when fossil fuels are burned?

The nitrogen cycle mostly takes place underground. Some bacteria convert gaseous nitrogen into ammonia through a process called nitrogen fixation. Some nitrogen-fixing bacteria live in nodules on the roots of plants; others live freely in the soil. nitrogen in atmosphere animals denitrifying bacteria nitrifying ammonium ammonification decomposers plant nitrogen-fixing bacteria in soil bacteria in roots nitrates nitrites

Ammonia released into the soil is transformed into ammonium. Nitrifying bacteria change the ammonium into nitrate. Nitrogen moves through the food web and returns to the soil during decomposition. nitrogen in atmosphere animals denitrifying bacteria nitrifying ammonium ammonification decomposers plant nitrogen-fixing bacteria in soil bacteria in roots nitrates nitrites

Nitrogen is also vital for life Why is nitrogen necessary in cells? Define the following terms: Nitrogen Fixation Ammonification Nitrification What organisms play a BIG role in the nitrogen cycle? Why?

The phosphorus cycle takes place at and below ground level. Phosphate is released by the weathering of rocks. Phosphorus moves through the food web and returns to the soil during decomposition. Phosphorus leaches into groundwater from the soil and is locked in sediments. Both mining and agriculture add phosphorus into the environment. geologic uplifting rain weathering of phosphate from rocks runoff sedimentation forms new rocks leaching phosphate in solution animals plants decomposers phosphate in soil

Phosphorous Cycle The Phosphorous Cycle is different than all the others because is never enters the ________________. Where can phosphorous be found?