1. Disturbances Are Common In Communities
By: Gary Bahling, Eli Samuel, & Emily Ziesmer

2. How Disturbances Can Have Positive and Negative Effects on Communities
Water filtration
Negative
Pollution
Oil Spills
Trees being killed

3. Primary and Secondary Succession Comparison
Primary Succession Description:
The transformation of an ecosystem or
community from bare rock to a primary
forest.

4. Primary and Secondary Succession Comparison
Secondary Succession Description:
When an existing community has been
cleared by some disturbance.

5. Primary and Secondary Succession Comparison
Comparison Between The Two:
Primary is the building of a community and
secondary succession is when the community
is cleared out by a disturbance,
not creating a community but killing it off.

6. How Human Activities Affect Species Diversity
Over-exploitation, pollution and habitat conversion are the main threats to species diversity.
They cause a gradual loss of species on local, regional and global levels.
Additionally, the introduction of species into new ecosystems destroys natural balance.
The ever-growing tendencies of tourism, transport, profit-oriented food production, and industry enforce these human activities.
Global warming and population growth continually increase these pressures on biodiversity.

7. Bibliography
Pic of oil-covered duck website:
Source 1: Biology book in science folder in Novell
Source 2: