Unit 3 Ecology 2015
Terms in this set (51)
A tropical rainforest which has been cut down to make way for a farm is abandoned 10 years later because the soil is no longer producing for the farmer. However secondary succession to return the forest does not occur. Why?
The limiting factor of nutrients is to low, the ecosystem has reached a tipping point, lack of transpiring plants has reduced the rainfall to below the range of tolerance, and rain forests are not resilient
When lions and leopards live in the same area, lions take larger animals as prey and leopards take smaller ones to avoid direct competition. This is called what?
A mahogany and a lasaba tree both reaching for limited light in the rain forest canopy
A hawk, which uses the crown of an oak tree to build a nest is what?
A dolphin uses echolocation to capture fish outside the reef. This is an example of what?
The relationship between a pollinating honey bee and an almond tree. This is an example of what?
Which habitat has the highest number of species
Lake turnover is important because it does what?
Carries oxygen to the bottom of the lake and brings nutrients to the surface of the lake
Which biome would be most effected by a large decrease in precipitation?
Temperate deciduous forest
Where is the largest area of old growth forest in the US?
Traveling southward from the arctic regions of Canada to the tropics of Panama, one passes through several biomes: Tundra, carnivorous forest, temperate desirgerous forest, and tropical rain forest. This pattern of change in vegetation is primarily the result of what?
Temperature and precipitation
Why do introduced species become pests?
They displace native species
Sea otters are an example of what?
What are ecosystem services of wetlands?
Flood control, ground water recharging and purifying water
In an aquatic ecosystem, undergoing thousands of years of succession, the climax community will most likely be what?
Which marine environment rivals coral reefs for diversity?
What does the biosphere not include?
Broad niches are characteristics of which type of species?
The beaver builds dams which floods areas creating a varied habitat. This is an example of what species?
Trout require clean water with high levels of dissolved oxygen so their presence tells researchers that they are present in the stream. What kind of species is this?
Alligators dig gator holes that provide habitat for other species, build nesting mounds that provide nesting sites for other species, reduce the number of predatory fish and keep water ways clear. The provisions of these services make alligators what?
Key stone species
a species such as the zebra muscle moves from one water system to another on the bottom of boats, upon arriving their generalist adaptations allow them to take over niches from local species and modify ecosystems. This is what type of species?
Competitive exclusion principle states that two species cannot operate by the exact same niche. If one species dominates the other species must do what?
Migrate, go extinct, or change to fit
The gradual establishment of biotic communities in lifeless communities where there is no soil is known as what?
Species in the northern hemisphere have shifted their ranges in which ways?
Expanding northern ranges and moving up mountains
Which biome has been used the most for agriculture?
How do parasites differ from conventional predators?
Rarely kill their hosts, they live on or in their hosts for long periods of time and parasites are usually much smaller than their hosts.
Are climax communities considered mid successional communities?
What is a combination of species richness and species evenness?
Natural selection occurs when individuals of a population have various adaptations which lead to what?
What is the most inclusive group out of population, ecosystem, biosphere and community
Salt marshes and mangrove forests are examples of what?
What would restore biodiversity?
What causes coral bleaching?
The country with the largest area of boreal forest?
The country with the largest region of temperate deciduous forest?
The country with the greatest percentage of land area effected by desertification?
What is true about mountains?
They regulate climate, play a role in the hydrologic cycle, contain most of the forests and provide habitat for endemic species
Is vegetation an abiotic factor?
The Sahel region of Africa where the Sahara deserts meet the grasslands?
What is a geographic area composed of multiple populations
What is the greatest threat to most species?
Loss of habitat due to human
What consists of all species interacting with each other in their nonliving environments?
Which biome is characterized by deep, rich fertile soil?
Why do you protect and identify key stone species as a goal of conservation biologists?
Play an essential ecological role in the community
What are effects of geographical isolation?
Hybridization in gene swopping,speciation, divergence of gene pools and reproductive isolation
All the factors that act to limit the growth of a population are summarized as the what?
How do predators play a beneficial role in the evolution of its prey?
Predators remove the sick, weak and least fit individuals
Which biome is characterized by conifers, severer winters, moose and bears?
What is the ability of a community to repair damage after moderate disturbance?
What are some ecosystem services of rivers?
Renew and renourish wetlands and provide habitat