Life on Earth Lesson 3 - Biomes National 5 Biology Unit 3 Life on Earth Lesson 3 - Biomes

Section 3. 16 – Biodiversity and the Distribution of Life By the end of this section you should be able to: Describe the terms biodiversity, habitat and ecosystem. Describe biotic, abiotic and Human influences that affect biodiversity in an ecosystem. Describe biotic factors include grazing and predation. State that pH and temperature are abiotic factors. State that Biomes are regions of our planet distinguished by their similar climate, flora and fauna. State that global distribution of biomes can be influenced by temperature and rainfall. State that an ecosystem consists of all organisms living in a particular area and the non-living components with which the organisms interact. State that a niche is the role that an organism plays within a community Give examples of organisms’ interactions with others in the community including competition, parasitism, and predation.

What are biomes? The different regions of our planet that have their own distinct climate, fauna (animal life) and flora (plant life).

There are a variety of ecosystems/biomes

Rainforest Wet Warm 16000 sp of trees Bromeliads (pineapple family) Viper orangutang http://www.twigonglow.com/films/tropical-rainforests-1198/

Desert Hot and dry, less than250mm rain/yr Cactus Acacia tree Desert Scrub Sand cobra

Temperate. Distinct seasons. Brown bear http://www.twigonglow.com/films/deciduous-forests-1197/ Beech tree Red deer

Tundra Caribou moss Alpine flowers Mountains Reindeer

Factors that can influence the global distribution of biomes. Temperature Rainfall