1 / 26

Communities & Biomes

Communities & Biomes. Limiting Factor. Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms. Examples of limiting factors. A.     Availability of food & water B.      Predation C.      Temperature – timberline D.     Sunlight

jerrod
Télécharger la présentation

Communities & Biomes

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. Communities & Biomes

  2. Limiting Factor Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms

  3. Examples of limiting factors • A.    Availability of food & water • B.     Predation • C.     Temperature – timberline • D.    Sunlight • E.     Climate • F.     Space

  4. Cascade Mountain

  5. Tolerance The ability of organisms to withstand fluctuations in biotic and abiotic factors

  6. Timberline on Mount Shasta

  7. Succession • The orderly, natural changes and species replacements that take place over time • e.g. abandoned parking lot over 30 years

  8. Types of Succession • Primary • Secondary

  9. Primary Succession • The colonization of barren land (no living organisms exist there) by pioneer species • Due to: • *Fire • *Flood • *Volcano

  10. Primary Succession • Pioneer species (Lichens & mosses) break up rock into soil • Ferns & weeds further break up soil • Seeds are carried by animals or blown by the wind

  11. Secondary Succession • The sequence of changes that takes place after an existing community is severely disrupted in some way (fire, flood, etc…) • PREVIOUS LIVING ORGANISMS AND SOIL ARE PRESENT

  12. Climax community • A stable, mature community that undergoes little or no change in species • a.      Can last hundreds of years • b.     Climax communities occur quicker through secondary succession because soil is already formed (primary succession takes longer due to soil formation)

  13. Biomes

  14. TheTerrestrial Biomes • Tropical Rainforest • Tropical Dry Forest • Tropical Savanna • Temperate Grassland • Desert • Temperate Woodland & Shrubland • Temperate Deciduous Forest • Temperate Coniferous Forest • Temperate Rainforest • Taiga • Tundra

  15. The Aquatic Biomes • Freshwater • Estuaries • Marine • Aquatic Biomes are determined by depth, flow, temperature, & chemistry of the overlying water

  16. Freshwater Biomes Flowing water Rivers & streams Standing water Lakes & ponds Wetlands* Bogs, marshes, swamps *Water covers the soil for part of the year

  17. Estuaries • Salt-marshes & mangrove swamps • Form where fresh & salt water mix • Called brackish water

  18. Marine Zonation of water by depth • Photic zone – light can penetrate • Aphotic zone – light DOES NOT reach • Benthic zone – ocean floor Zonation of water by distance from the shore • Intertidal zone • Coastal (Neritic) zone • Open ocean

More Related