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Ecosystems

Ecosystems. EARTH AND HUMAN ACTIVITY. Ecosystems. Interactions between the living things and the nonliving things in a place Each species in an ecosystem has its own role to play, called a niche. Competition between species in an ecosystem

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Ecosystems

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  1. Ecosystems EARTH AND HUMAN ACTIVITY

  2. Ecosystems • Interactions between the living things and the nonliving things in a place • Each species in an ecosystem has its own role to play, called a niche. • Competition between species in an ecosystem • Changes in an ecosystem over time is called ecological succession

  3. Producers/ Consumer • Herbivore/ Carnivore/ Omnivore • Predator/ Prey • Scavengers Members of an ecosystem

  4. Water Cycle • Hydrologic cycle • Water covers ¾ of the earth’s surface • Oceans make up 97.2% of total water • Water is always changing states between liquid, vapor, and ice

  5. Nitrogen Cycle 78% of earth • smog- nitric oxide (NO) • Greenhouse gas- nitrous oxide (N2O) • Acid Rain-(nitrogen oxides) • In surface waters, extra nitrogen can lead to nutrient over-enrichment. • FERTILIZERS! • Extra nitrogen fertilizer can runoff, where it contaminates surface water or infiltrates into ground water. • In drinking water, excess nitrogen can lead to cancer in humans and respiratory distress in infants. Human Impacts

  6. Nitrogen cycle

  7. Carbon and oxygen cycle • Carbon is the most abundant element of our bodies • Photosynthesis, respiration, combustion and decomposition.

  8. Resources Renewable Nonrenewable • Can be replaced or more formed in nature • Cannot be replaced or made naturally on Earth

  9. Effects of human activity on Earth

  10. Global Warming • Rising sea levels and coastal flooding • Changed precipitation patterns which may result in droughts in some regions and increased levels of crop failure • An increase in insect borne diseases in temperate regions such as New York State as milder winters fail to kill the disease carrying insects. (The increase in the incidence of West Nile virus may be an example of this.)

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