1. Communities and Biomes
Biology
Mr. Solis

2. Life In A Community
A community is alive, and each population or factor in it contributes something important to the life of the community.
Various combinations of abiotic and biotic factors interact in different places around the world.

3. Biomes
A biome is large group of ecosystems that share the same type of climax community.

4. Characteristics of Aquatic Biomes
Marine Biomes- Ocean based biomes that is divided into two areas.
Photic zones- Portion of earth that is shallow enough to allow sunlight to penetrate. These consist of coastal ecosystems.
Examples are bays, rocky shores, sandy beaches, mudflats, and estuaries, and coral reefs.

5. Aquatic Biomes
Aphotic Zones- Includes the deepest and least explored areas of the ocean.

6. Aquatic Biomes
Estuaries- a coastal body of water, partially surrounded by land, in which freshwater and saltwater mix.
These areas are thick in grasses which trap lots of food and become fish nurseries.
Example: The Arroyo

7. The Effects of Tides
Intertidal Zones- The portion of the shoreline that lies between the high and low tides. These areas have high levels of sunlight, nutrients, and oxygen.

8. Freshwater Biomes
Ponds- lots of plant life due to its shallow water which allows plenty of sunlight t penetrate to the bottom of the pond.
Lakes- Lots of plant life along the edge of the lake. This is due to shallow water and plenty of sunlight.
Rivers and Streams- Contains lots of nutrients because of run offs, but very difficult for plant life to grow due to its constant flow.

9. Terrestrial Biomes These Land Biomes are based on Latitude Climate
Rainfall
Temperature

10. Tundra
A treeless land with long summer days and short periods of winter sunlight.
Conditions
Never rises above freezing
Permanently frozen layer
Topsoil so thin it can’t support life
Life
Grasses, short shrubs and cushion plants
Small mammal
Caribou, Musk oxen, reindeer

11. Taiga A continuous belt of coniferous forest. Conditions
Are somewhat warmer and wetter
Long severe winter and short mild summers
Life
Abundance of trees ( more food and shelter for life)
Lynx, snowshoe hare, caribou, moose and migratory birds.

12. Desert
The driest biome, a region with sparse to nonexistent plant life.
Conditions
Less than 25 cm of rain
Hot during day cold during night.
Life
Drought resistant trees, shrubs and grass
Annual plants that germinate during sporadic rainfalls.
Nocturnal animals
Hawks, coyotes and owls.

13. Grasslands
Large communities covered with rich soil, grasses and similar plants.
Conditions
25-75 cm of precipitation
Experience dry seasons
Summers hot and winter cold
Life
Grasses
Some trees found near streams.
Grazing animals
Prairie dogs, foxes, insects, birds, reptiles.

14. Temperate Forest
Are dominated by broad leaved hardwood trees that lose their foliage annually.
Conditions
cm precipitation per year
Temperate weather
Life
Deciduous trees
Bears, rabbits, migratory birds.

15. Rain Forests
Have warm temperatures, wet weather, and lush plant growth. Located near the Equator.
Conditions
Average temp: 25ºC
Average rainfall: 400 cm per year
Life
Diverse Group of species due to an abundance of habitats.
Three major stories
Canopy- tree tops
Understory- below canopy and above ground
Ground- forest floor

16. The End