BIOL 4150 Lecture 3: Lecture 3 & 4

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ochreherring44

17 Feb 2012

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Population: group of organisms or individuals of the same species occupying a particular place at a particular time. Community: a group of interacting populations of different species including species populations within the same trophic level (plants interacting with plants) and from higher or lower levels (decomposers, herbivores, predators) Ecosystem ecology: the study of the movement of energy and matter through ecosystems. Organisms as units with multiple modules per individual. Lecture 4: a definable distribution varies in size, location, with season, a definable spacing of individuals, a definable density of individuals. A range of processes can create the same density: range, habitat tolerance and. Threatened: j-curve: a definable rate of births and deaths, a definable rate of growth. Interaction of birth and death rates over time. demographically positive = > 1 (high births and immigration) demographically negative = < 1 (high deaths and emigration: a definable balance between immigration and emigration.

Related Questions

Which of the following best describes a species?

◯ A. A group of organisms that interbreed and have common characteristics

◯ B. An interacting group of populations that occupy the same area

◯ C. A group of organisms that interact with nonliving parts of the environment

◯ D. All of the individuals of the same population that inhabit an area

ceruleandolphin765

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

Would you classify sperm whales as an r-selected species, aK-selected species, or a species exhibiting both r and Kattributes? Defend your answer.

Describe how a community and an ecosystem are related.

Which of the following levels of organization are in order, fromsimplest to most complex. a. population, organism, community,ecosystem
b. community, ecosystem, population, organism
c. organism, community, population, ecosystem
d. population, ecosystem, organism, community
e. organism, population, community, ecosystem

Mosses growing on bare rock will eventually help to create soil.These mosses are involved in ___ succession.
a. primary
b. secondary
c. tertiary

If a farmer sprays a pesticide onto a field and kills half of theinsect pests, he has caused a reduction in________.
a. field capacity
b. carrying capacity
c. population size
d. More than one of the above

What type of survivorship curve would you expect for a plantspecies in which only a few seeds are produced and most of thesesurvive to produce adult plants?
a. type I
b. type II
c. type III

An ecological niche is an organism's_______ in an ecosystem.
a. location b. habitat c. resources d. function

No matter how rapidly populations grow, they eventually reach alimit and begin to stabilize. This is called the______________.

Unicellular algae live in the tissues of coral animals. The algaeprovide food for the coral, while the coral provides a stable homefor the algae. This is an example of
a. Parasitism
b. Commensalism
c. Mutualism

BIOL 4150 Lecture 3: Lecture 3 & 4

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