Cycles in Nature Spring 2017.

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Presentation transcript:

Cycles in Nature Spring 2017

Question How does matter move among the living and nonliving parts of an ecosystem? ANSWER Matter is recycled within and between ecosystems through biogeochemical cycles.

Cycles in Nature Biogeochemical cycles- Elements, compounds, and other forms of matter are passed from one organism to another. Also passed from one part of the biosphere to another They connect these aspects: Biological Geological Chemical

The Water Cycle Water is constantly moving between the atmosphere and Earth!

The Carbon Cycle Carbon plays many roles 4 main processes move carbon Biological processes, such as photosynthesis, respiration and decomposition Burial and decomposition of dead organisms and their conversion under pressure (fossil fuel) Geochemical processes such as erosion and volcanic activity release CO₂ Mining, cutting and burning forests, burning fossil fuels

The Nitrogen Cycle The atmosphere is the main reservoir of nitrogen. It also cycles through the soil and tissues of living organisms.

The Nitrogen Cycle Nitrogen fixation Denitrification Bacteria that live in the soil and on the roots of certain plants Convert nitrogen gas into ammonia, nitrates and nitrites Primary producers make them into proteins and nucleic acids Denitrification Other soil bacteria obtain energy by converting nitrates into nitrogen gas Gas is released back into the atmosphere

The Nitrogen Cycle Plants that add nitrogen Peanuts Peas Legumes (beans, alfalfa) Why do plants need nitrogen? It’s a major component in chlorophyll Roots perform more efficiently, drawing in more water Yellow leaves? Not enough nitrogen Too much nitrogen causes nitrogen toxicity.

The Phosphorous Cycle Phosphorous in the biosphere cycles among The land Ocean sediments Living organisms

The Phosphorous Cycle Not abundant in the atmosphere Mined, turned into fertilizer and applied to crops. Taken up by primary producers, reused by consumers. Released by excretion and decomposing matter. Geological activity washes from rock into the ocean.

The Carbon and Nitrogen Cycles Amoeba Sisters https://www.youtube.com/watch?v=NHqEthRCqQ4&list=P LwL0Myd7Dk1F0iQPGrjehze3eDpco1eVz&index=36 Video Review Handout Worth 100 points Due at the end of the video This video plays through ONLY 1 time.