BIOL 1500 Lecture Notes - Lecture 18: Exponential Growth

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skyantelope560

6 Oct 2016

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Ecology is the study of the relationships among organisms and the environment. A population consists of interbreeding organism of one species occupying the same area at the same time. A community includes all populations, representing multiple species in the same region. An ecosystem is the biotic, or living, community plus the abiotic, or nonliving environment. The biosphere is all parts of the planet where life exists. Mark-recapture: these methods provide only a static snapshot of the population. Factors to consider when calculating population density: births and migration into the population increase population size. Birth rate is the number of individuals produced per unit time: deaths and migration out of the population decrease the population size. Death rate is the number of deaths per unit time. A population"s age structure, or distribution of age classes, helps determine whether a population is growing, stable, or declining.

Related Questions

Question 13

Species that are purposely or accidentally introduced to a new geographical region

Answers:	frequently form hybrids with native species
	die out quickly
	can become serious pests by killing the native species
	experience increased mutation rates that help them adapt to the new ecosystem

______________

Match the following terms with correct definition.

Question
biome
population
ecosystem
community

All Answer Choices
A. all of the individuals of a species in a specific area
B. comprises all of the biotic and abiotic factors in a particular area
C. interacting species occupying a given habitat
D. large scale interactions of species defined on land by the type primary type of vegetation

_______________

Question 24

Which of the following is an example of a species distributed in a random distribution?

Answers:

oak trees that drop their seeds to the ground

a herd of elephants traveling to the watering hole

dandelion seeds that are blowing in the wind

nesting penguins

________________

Question 33

________

Which of the following is a threat to biodiversity?

Answers:

habitat loss

overharvesting

climate change

all of the above

_____________

Some theories around why more diversity in species or areas known as [a___________] are found near the [b_______] are: more energy or greater [c_____] of the ecosystems, giving the opportunity for more [d________].

Answers:

age

speciation

equator

size

hotspots

evolution

Question 5

The majority of water found on Earth is

Answers:	salt
	fresh water
	ice
	water vapor

____________

Question 13

Species that are purposely or accidentally introduced to a new geographical region

Answers:	frequently form hybrids with native species
	die out quickly
	can become serious pests by killing the native species
	experience increased mutation rates that help them adapt to the new ecosystem

______________

Match the following terms with correct definition.

Question
biome
population
ecosystem
community

All Answer Choices
A. all of the individuals of a species in a specific area
B. comprises all of the biotic and abiotic factors in a particular area
C. interacting species occupying a given habitat
D. large scale interactions of species defined on land by the type primary type of vegetation

_______________

Question 24

Which of the following is an example of a species distributed in a random distribution?

Answers:

oak trees that drop their seeds to the ground

a herd of elephants traveling to the watering hole

dandelion seeds that are blowing in the wind

nesting penguins

________________

Question 33

________

Which of the following is a threat to biodiversity?

Answers:

habitat loss

overharvesting

climate change

all of the above

_____________

Some theories around why more diversity in species or areas known as [a] are found near the [b] are: more energy or greater [c] of the ecosystems, giving the opportunity for more [d].

Answers:

age

speciation

equator

size

hotspots

evolution

Shawnta used several terms in her post that I want to be sure everyone understands. Ecology is studied with a hierarchy, similar to the hierarchy of classification. The lowest level is the individual. A group of individuals of the same species that live in the same area is called a population. All of the different populations that live in the same area make up a community. So far we have only been talking about the living organisms. When you add in the non-living components of an area you have an ecosystem. The living parts of an ecosystem are called the biotic components and the non-living parts are called the abiotic components.
What are some of the abiotic components that affect what can live in an ecosystem?

mauvewhale457

BIOL 1500 Lecture Notes - Lecture 18: Exponential Growth

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