1 / 9

Ecosystems and Environment

Ecosystems and Environment. Biogeochemical cycles. All materials flow through the environment over time- materials cycle through the environment. Energy. Energy flows through the environment Sunlight to chlorophyll to photosynthesis to sugars to plant biomass to….

tamayom
Download Presentation

Ecosystems and Environment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ecosystems and Environment

  2. Biogeochemical cycles • All materials flow through the environment over time- materials cycle through the environment

  3. Energy • Energy flows through the environment • Sunlight to chlorophyll to photosynthesis to sugars to plant biomass to…. • Food chains - energy passes from one organism to another - it is a one way trip- energy passed through the environment in a linear fashion- unlike materials

  4. Food chains • Trophic levels • available energy and biomass decrease at each trophic level • Gross primary productivity - rate at which energy is captured and stored in plant tissues • Net primary productivity - energy after plant’s requirements

  5. Major ecosystems • Biomes - large distinct ecosystem • tundra • tiaga or boreal forest • temperate rainforest • temperate deciduous forest • temperate grasslands • chaparral

  6. Biomes • Deserts • savanna • tropical rainforests

  7. Aquatic ecosystems • lakes and ponds • littoral zones - nearest to shore • limnetic zones - open water • profundal zone - no light • marine • intertidal - very productive • pelagic - open ocean • euphotic - light is present (100m) • neritic - 100m to 200m • oceanic - no light

  8. Stratification in water • In summer warm layers on top, colder at the bottom, separated by thermocline • in fall, water turns over and some mixing between layers occurs • in winter cold at top, warmer at bottom • in spring another turnover! • Spring turnover stimulates algae growth...

  9. Environmental Issues • Habitat destruction • pollution • foreign or exotic species • deforestation • global warming • ozone depletion

More Related