Food chains
Succession
Nutrient Cycles
Population Dynamics
Food webs/Energy pyramid
100
What would the food chain look like for the organisms above that are found in the desert?
Grass --> rabbit --> coyote
100
What type of succession has NO SOIL present in the beginning?
Primary Succession
100
Once bacteria have fixed nitrogen, it can be taken up by plants and animals, where it is used in the production of:
proteins
100
The organisms in a typical backyard are likely to include bacteria, grass, shrubs, trees, insects, spiders, birds, and small mammals. Together, all these organisms make up -
population, community, ecosystem or biome
community
100
Which level is most likely the producers?
D
200
A disease has greatly reduced the number of night snakes present in a desert ecosystem. Which population would increase as a direct result of the decrease in the night snake population?
wood rats
200
What is the niche (role) of pioneer species in primary succession?
break down rock to make soil!
200
What process is represented by X? What about Y?
X = respiration
Y = photosynthesis
200
What type of growth is represent by part B on the graph?
exponential growth
200
An increase in what population would lead to a decrease in the squids?
cod
300
What is the source of energy for all living things?
the sun
300
What is a climax community?
BONUS: what is the climax community in Virginia?
A mature and stable community
BONUS: Deciduous Hardwood forest (oak and hickory trees)
300
What is one human impact on the carbon cycle?
burning fossil fuels!
respiration
feeding on plants and other animals
300
The graph below indicates the size of a fish population over a period of time. The section of the graph labeled A represents
Carrying Capacity
300
grasshopper, squirrel, and rabbit
400
What type of organism is most likely represent by X?
decomposer
400
In an aquatic habitat, an example of organisms from the pioneer community would be -
water reeds, water lilies, grass, or algae
algae
400
The movement of carbon through an ecosystem is related to the flow of energy. What is the role of carbon dioxide in the flow of energy through an ecosystem? Carbon dioxide is absorbed by -
producers/plants to make carbohydrates (sugars)
400
In an initial population of 100 snowy plovers, there were 30 births and 20 deaths in one year.
Based only on the birth and death rates, identify the expected size of the snowy plover population at the end of the year.
110
400
Draw an energy pyramid for the food web above
500
True or False
The arrows in food chains and food webs always point to what is being eaten
false - they point from food to consumer
500
What is the correct order for the events of ecological succession?
B --> D --> C --> A
500
As plants and animals decompose they release nitrogen into the surrounding environment in the form of ammonium ions (NH4+). What is this process known as?
Ammonification
500
If a predator of the lynx enters the food chain what would happen to the number of Snowshoe hares?
they would increase
500
The producers in the ecosystem produce 25,000,000 kilocalories per year. How much energy is available to the organisms in level 2 of the the pyramid?
2,500,000 kilocalories