energy flows through the ecosystem

QUESTIONS
1. (a) Examples of primary produceres. (b) How do they get their energy?
2. (a) The second trophic level is made up of what creatures. (b) How do they get their energy?
3. Why do predators make up the third trophic level?

ANSWERS
1. (a) plants, algae, and some bacteria. (b) use solar energy to produce organic plant material through photosythesis.

2. (a) Herbivores (plant eaters). (b) get energy through photosynthesis.

3. because they eat second trophyic level animals and other small predators.

animal habitat structure

How does eelgrass density influence abundance of species in a ecosystem?

-Provide habitats for invertebrates, food, and cover for the many species that live there
-Its rhizomes help to trap sediment and anchor shifting sands, and its leaves dampen wave action. This helps to prevent beach erosion

http://www.oregon.gov/DSL/SSNERR/tides/tidesA13_eelgrassfacts.pdf
http://www.crd.bc.ca/watersheds/protection/wildlife-plants/eelgrass.htm

Animal Habitats of San Diego Bay

San Diego Bay is home to a list of Natural resources like salt marsh and tidal flats, birds nesting, and foraging sites

An invasive species is those who evolved elsewhere and whose introduction has or is likely to cause harm to the environment or human health.

An endangered species is a species who is at the risk of extinction. An endangered species in the SD Bay is the Pacific Green Sea Turtles. The San Diego bay offers a protected foraging habitat for the sea turtles and offers a prime study area for researchers

http://www.portofsandiego.org/environment/natural-resources.html

Intro to San Diego Bay

The San Diego bay is located in San Diego county. It is 19km long and 1.6 to 4.8 km wide. It is the 3rd largest of 3 natural bays

Activities on the bay are military activities and training

The shallow end of the bay is used for evaporation to extract salt from sea water.

The San diego National Wildlife refuge complex is located in Chula Vista

The purpose of the SD National Wildlife is to preserve and protect the rare birds of southern california coastal marshes.

http://en.wikipedia.org/wiki/San_Diego_Bay

http://www.fws.gov/sandiegorefuges/