1. Day 2 Ecology – Ecosystem Stability and Changes
Homework due Wednesday 4/25/18
11D: Describe how events and processes that occur during ecological succession can change populations and species
11B: Investigate and analyze how organisms, populations, and communities respond to external factors
12D: Recognize that the long term survival of a species is dependent on changing resource bases that are limited
12E: Describe the flow of matter through the carbon and nitrogen cycles and explain the consequences of disrupting these cycles
12F: Describe how environmental change can impact ecosystem stability
Match the word with the correct letter G. M. J. L. I.
A. The development of an ecological community in a previously uninhabited location
B. The development of an ecological community in an area that was once inhabited, but experienced devastation
C. All of the organisms of one species within a particular ecosystem
D. The total variation of species within a given ecosystem
E. A stable ecological community that has reached an equilibrium after having adapted to its environment
F. The first plant species to grow during primary succession
G. Established and non-changing
H. All of the interacting species within a particular ecosystem
I. An interruption or disruption
J. A system consisting of all of the interactions that occur between the abiotic (nonliving) and biotic (living) factors within an environment
K. The conversion of nitrate in the soil into nitrogen gas by bacteria in the soil.
L. The cycle in which nitrogen is cycle through an ecosystem
M. The cycle in which carbon is cycled through an ecosystem
O. The conversion of atmospheric nitrogen into a form that plants can use by soil bacteria.

2. The Cycles of the Earth 12F (S)
1) Complete the Carbon and Nitrogen cycles.

3. Primary and Secondary Succession 11D (R)
1) Compare and contrast Primary and Secondary Succession using the Venn Diagram below
Word bank:
No previously existing life, Plants and Animals adapt, Comes after a natural disaster, Climax Community, Starts as a result of a forest fire or flood, Starts as a result of a volcano or receding glacier, Previously existing life, Pioneer Species, starts with previously existing soil, starts on bare rock, Lichens break down rock, Happens relatively slow, Happens relatively fast, Gradual growth
2) Number the correct order of Primary Succession below.
3) Number the correct order of Secondary Succession below.