1 / 24

msu/~rjstev/EIPP_Intro_2001.htm

http://www.msu.edu/~rjstev/EIPP_Intro_2001.htm. http://www.msu.edu/~rjstev/Eco_Health_pt1_2001.htm. http://www.msu.edu/~rjstev/Eco_Health_pt2_2001.htm. What are Ecosystems and Why Do We Need to Protect Them?. Points of Emphasis. Ecological Systems are Complex, but Logical

teddy
Télécharger la présentation

msu/~rjstev/EIPP_Intro_2001.htm

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. http://www.msu.edu/~rjstev/EIPP_Intro_2001.htm http://www.msu.edu/~rjstev/Eco_Health_pt1_2001.htm http://www.msu.edu/~rjstev/Eco_Health_pt2_2001.htm

  2. What are Ecosystems and Why Do We Need to Protect Them?

  3. Points of Emphasis • Ecological Systems are Complex, but Logical • Ecosystems are Dynamic, yet Homeostatic • Ecological Responses to Humans Varies with Duration of Stress • Values of Ecosystems

  4. What is an Ecosystem? Temp Consumers (Animals) Sun Group of interacting organisms and the physical and chemical elements in a defined area. Producers (Plants) Decomposers (Bact.) Moisture Abiotic Chemicals (CO2, H2O, O2, NH3)

  5. What is an Ecosystem? Group of interacting organisms and the physical and chemical elements in a defined area.

  6. Watershed Hydrology & Sourcesheds Routes of Resources and Contamination

  7. AllochthonousInput Algae Grazers Predators Light CPOM/ FPOM Shredders Collectors Plants Nutrients Bact. & Fungi Aquatic Ecosystems

  8. AllochthonousInput Material Cycling Algae Grazers Predators CPOM/ FPOM Shredders Collectors Plants Nutrients Bact. & Fungi

  9. AllochthonousInput Energy Cycling Algae Grazers Predators Light CPOM/ FPOM Shredders Collectors Plants Bact. & Fungi Heat Energy

  10. AllochthonousInput Energy Cycling Balance GPP = R Algae Grazers Predators Light CPOM/ FPOM GPP Shredders Collectors Plants Bact. & Fungi Heat Energy Respiration (R)

  11. AllochthonousInput Algae Grazers Predators Light CPOM/ FPOM Shredders Collectors Plants Nutrients Bact. & Fungi

  12. AllochthonousInput Algae Grazers Predators Light CPOM/ FPOM Shredders Collectors Plants Nutrients Bact. & Fungi

  13. AllochthonousInput Grazers Algae Predators Light CPOM/ FPOM Shredders Collectors Plants Nutrients Bact. & Fungi

  14. AllochthonousInput O2 Algae Grazers Light Predators CPOM/ FPOM Plants Shredders Collectors Nutrients Bact. & Fungi

  15. Bioconcentration of Contaminants(Residues of DDT (ppm) in various trophic levels of an estuary food web) Fish-eating Birds (3.15-75.5) Fish (0.17-2.07) Shrimp (0.16) Mud Snail (0.26) Clam (0.42) Insects (0.23-0.3) Organic Debris (0.3-13.0) Marsh Plants (0.33-2.8) Cladophora (0.03) Plankton (0.04)

  16. Biotic Interactions Trophic Interactions (i.e. predator/prey) Competition Intraspecific Interspecific Disease/Parasitism Mutualistic Interactions Abiotic Factors (Limiting factors) Climate Temperature Rainfall Day – Length Seasons Geology Soils & Water Chemistry Hydrology Soil Moisture Resources Light Nutrients Physical Disturbance Interactions among Organisms and Their Environment

  17. Abiotic Regulation (non-resource) of Populations (Species) Range of Tolerance Metabolism (e.g. growth, reproduction) Zone of stress Zone of stress Comp. Level Environmental Gradient (e.g. Temp)

  18. Resource Regulation of Populations Range of Tolerance Zone of stress Metabolism (e.g. growth, reproduction) Comp. Level Resource Gradient (Light, N, P, Prey)

  19. Carrying Capacity (CC) of Populations CC Population Abundance Time (d, wks, mon, yrs)

  20. Carrying Capacity (CC) of Populations CC Population Abundance Time (d, wks, mon, yrs)

  21. Interactions Among Land,Streams, Lakes, and Wetlands Land Lakes Wetlands Streams

  22. Habitat Functions • Storage and Transformation • (Water, Nutrients, Sediments) • Settling or Biological Uptake and Retention • Transport (Water, Nutrients, Sediments, Biota) • Habitat for Spawning/Breeding • Habitat for Development of Young • Habitat for Adults • Productivity • Support of Diversity • Homeostasis from Interactions

  23. Natural Regulatory Factors & Ecoregions

  24. Natural Sources of Variability • Species Membership • Competition • Predation • Mutualism • Production • Primary Production • Secondary Production • Nutrient and Energy Cycling • Soil fertility • Fisheries productivity • Primary Factors • Climate (Temp/Rain) • Geology • Secondary Factors • Hydrologic Variability • Soils • Temperature • Water Chemistry • Light

More Related