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Ch 21
Ecology
32
Biology
Undergraduate 2
04/26/2012

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Term
Population Ecology
Definition
The study of a group of organisms of the same species living and interacting in a particular area.
Term
WHAT IS ECOLOGY?
Definition
The study of the interactions between organisms and between organisms and their nonliving environment
Term
Community Ecology
Definition
The study of interacting populations of different species in a defined habitat.
Term
Ecosystem Ecology
Definition
Study of all living organisms in an area and the nonliving components of the environment with which they interact.
Term
A population will continue to grow as long as the __________ exceeds the __________.
Definition
Birth rate
Death Rate
Term
age structure
Definition
the relative number of individuals at each age
Term
Science Ecology Three Main Parts
Definition
Population Ecology
Community Ecology
Ecosystem Ecology
Term
Our carrying capacity could potentially be limited by ?
Definition
food, space, nonrenewable resources, or buildup of wastes.
Term
Individual
Definition
a single organism of a particular species
Term
Population
Definition
a group of individuals of the species living and interacting in the same region
Term
Community
Definition
interacting population of different species
Term
Ecosystem
Definition
species interacting with other species and the environment
Term
What are the patterns of dispersion?
Definition
Clumped
Uniform
Random
Term
Random
Definition
Individuals are equally likely to be anywhere within the area.
Term
Clumped
Definition
High-density clumps are separated by areas of low abundance.
Term
Uniform
Definition
Individuals maximize space between them by being uniformly spaced.
Term
Exponential growth
Definition
the population is growing at constant rate without ceasing.
Term
Can a population truly grow exponentially?
Definition
No.
Term
How many humans can the biosphere support?
Definition
It varies from the resources within a country. The more people we have the ore even the distribution of resources we will have.
Term
Carrying Capacity
Definition
The maximum number of individuals in a population that a particular area can support given available resources.
Term
Zero Population Growth
Definition
Term
Logistic growth
Definition
Population growth is limited by environmental factors, such as available food sources, disease, and access to natural resources.
Term
Abiotic Factors
Definition
Non-living environmental factors: climate and temperature.
Term
Biotic Factors
Definition
Living Environmental Factors: Food, Predators, Disease
Term
Rapid Growth
Definition
Larger amount of children (0-19) than the ages of childbearing.
Term
Slow Growth
Definition
The amount of children is relative the same of the age group of childbearing.
Term
No Growth
Definition
The amount of children is smaller than the amount of people within childbearing ages.
Term
Explain why an increase in prey population is followed by an increase in predator populations a few years later.
Definition
If there is high population within the the prey, they will start to decline because of lack resources. Then the the predator will grow because they hunt the prey which causes a decline in the prey, which increases the population of the predators.
Term
Explain how changes in carnivore population can affect the growth of nearby vegetation.
Definition
The carnivore hunt the herbivore which increases the growth of vegetation. When the carnivore population declines from lack of prey, the prey feeds on the vegetation. So the vegetation declines.
Term
Explain how changes in carnivore population can affect the growth of nearby vegetation.
Definition
Urine- Tell the nutritional status of species
Scat- The food they eat and genetic profile
Bones- Tell how the animal die by being hunted or natural cause, such as disease.
Term
Explain why warming climate tends to decrease moose populations
Definition
Moose needs shade nor like to sweat. Moose rest so they aren't eat as often. Without eating they don't have enough fat to stay warm in the winter.
Term
Describe two methods by which ecologists determine population size.
Definition
Surveying an area by counting all the population or estimating a section and then multiplying.
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