Bio Ecology Study Guide

Asian carp, an invasive species, were introduced accidentally into Missouri aquatic ecosystems. Both the Asian carp and the native paddlefish are plankton feeders. After the introduction of Asian carp, the paddlefish population immediately began to decline. Based on this information, why is the native paddle fish population declining? Choose all that apply

• They occupy the same niche
• Native paddle fish compete for the same food as the Asian carp
• The introduction of Asian carp caused a drop in water temperature
• Native paddlefish populations are declining as a result of increased human consumption
• The introduction of Asian carp limited the locations where native paddlefish hide from predators

Deforestation has the effect of: (choose all that apply)

• increasing atmospheric CO2
• contributing to climate change
• decrease biodiversity
• increasing atmospheric O2
• decreased soil loss due to erosion

Up until the 19th century the carbon cycle was in balance. Modern human activity has contributed to the current imbalance of the carbon cycle leading to more carbon being released into the atmosphere than carbon being absorbed from the atmosphere. Which of the following human activities contribute to the accumulation of carbon in the atmosphere? Choose all that apply

• Deforestation
• Increased respiration due to more people getting into shape
• Increased photosynthesis due to growing more crops
• Burning fossil fuels
• Increased cultivation of mushrooms

A species that has a disproportionately large effect on community structure relative to its biomass or abundance is known as a __________________ species.

• keystone species
• pioneer species
• foundation species
• invasive species

There are 2 variations of a species of peppered moth. One is very light gray and the other is black. All of the moths live on trees with with white bark. What is most likely to lead to more black moths and fewer gray moths?

• Drought kills many of the trees.
• A contagious disease kills many of the moths.
• Air pollution stains the tree bark a darker color.
• New predators are introduced and eat more moths

A wetland is an area of land saturated by water such as a marsh or swamp. Which human activity would decrease the biodiversity of a wetland?

• adding a drainage system
• cleaning pollution out of the water
• limited fishing
• reintroducing native aquatic plants
• restricting the use of water on farmland

What does the red dotted line on this graph represent?

• exponential growth
• logistic growth
• carrying capacity
• density dependent factors

Which of the following is not an abiotic factor.

• temperature
• competition
• precipitation
• soil

Which of the following lists the levels of ecology from smallest to largest?

• organism, population, community, ecosystem, biosphere.
• organism, community, population, ecosystem, biosphere
• biosphere, ecosystem, community, population, organism
• population, organism, ecosystem, community, biosphere

On the African savanna, large herbivores such as elephant and giraffe would be found in

• Trophic level A
• Trophic level B
• Trophic level C
• Trophic level D