1 / 6

What Shapes an Ecosystem?

What Shapes an Ecosystem?. Prairie in Effigy Mounds National Monument , Iowa, United States. The Daintree Rainforest in Queensland , Australia . . Biotic and Abiotic Factors. Biotic = living Examples: wolf, elk, grass, parasites, bacteria Abiotic = nonliving

osric
Télécharger la présentation

What Shapes an Ecosystem?

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. What Shapes an Ecosystem? Prairie in Effigy Mounds National Monument, Iowa, United States The Daintree Rainforest in Queensland, Australia.

  2. Biotic and Abiotic Factors • Biotic = living • Examples: wolf, elk, grass, parasites, bacteria • Abiotic = nonliving • Examples: climate, weather, water, nutrients, soil, sunlight ABIOTIC + BIOTIC DETERMINE THE SURVIVAL AND GROWTH OF AN ORGANISM AND PRODUCTIVITY OF THE ECOSYSTEM

  3. Niche • Niche = full range of physical and biological conditions in which an organism lives and the way it uses those conditions • Includes: • Its place in the trophic pyramid and food web • Range of temperatures for survival • How climate is tied to reproductive cycle (time of mating, appearance and stages of offspring)

  4. Competition = organisms of same or different species attempt to use same resource at same time Predation = one organism captures and feeds on another Symbiosis = two species living close together Mutualism Commensalism Parasitism -- -- + -- + + + 0 + -- Community Interactions lichen

  5. Ecological Succession • Primary Succession = occurs on surfaces where no soil exists • Examples: • New land is formed by lava flow or volcanic ash • Glaciers melt and expose bare rock • Secondary Succession = a disturbance changes an existing community without removing the soil • Examples: • land cleared for farming is abandoned • Wildfire burns woodlands

  6. Succession in Marine Ecosystem • Large whale dues and sinks to normally barren ocean floor • Carcass attracts decomposers and scavengers (amphipods, hagfish, shark) • Within a year most of flesh is gone, fewer fish, crabs, marine snails remain • Decomposition of carcass provides nutrients to ocean floor • When only skeleton remains, bacteria decompose oils in bones • Releases nutrients, feed other bacteria • Bacteria are then food for community of limpets, mussels, snails, worms, crabs, clams

More Related