For the following diagram answer the following questions: Name two primary consumers. What organism is missing that would make this a complete food web? Identify the secondary consumer(s). 2. List three abiotic factors in an ecosystem. 3. All the plants, animals, and protists living in a forest make up a a. population b. community c. species d. phylum For the following diagram answer the following questions: List the producers. List the primary consumers. List the carnivores. Explain the effect on ONE of the species if the fish population decreased.

DO NOW: MAKE A LIST OF POSSIBLE REASONS WHY THE MARINEWATER BIOME IS THE MOST STABLE BIOME.

Aim: How is stability accomplished in an ecosystem?

Ecosystem Stability Stability is state or point at which an ecosystem has reached a sustainable and balanced level

Factors that affect ecosystem stability include: The relationships and interdependencies of organisms of the ecosystem.   The types of animal communities found in an ecosystem , which is dependent upon the kinds of plants

Stability is attained through a process known as succession, whereby relatively simple communities are replaced by those more complex

Ecological Succession The process by which an existing community is slowly replaced by another community. Succession continues until a stable community develops, this stable community is called a climax community

climax community   The stage in succession where the community has become relatively stable through successful adjustment to its environment.

What can cause the demise of a climax community? A catastrophic event such as flood fire volcanic eruption

DEGREES OF SUCCESSION Primary Succession: Succession begins on bare rock, an area without life.

Secondary Succession: Succession occurs in an area which an existing community has been partially destroyed.

The first organisms to appear during succession are called pioneer organisms Example include: lichens and mosses

SUCCESSION

What are some factors which affect the rate of succession?

How does successsion occur?

A rocky island appears as oceanic waters recede A rocky island appears as oceanic waters recede. Which of the following forms of vegetation would probably appear first on the bare rocks? lichens weeds shrubs pioneer trees