Marine Ecology Lecture 7: Organisms and Their Environment

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Questions and Answers

What is the definition of 'habitat'?

The interaction between organisms and their environment

The physical place where an organism lives (correct)

All populations of organisms living in a defined area

The resources an organism uses for survival, growth, and reproduction

Which term refers to the resources (biotic & abiotic) an organism uses for survival, growth, and reproduction?

Ecology

Habitat

Community

Niche (correct)

What does the term 'ecology' refer to?

The interaction between organisms and their environment (correct)

The physical place where an organism lives

The resources an organism uses for survival, growth, and reproduction

All populations of organisms living in a defined area

Which term refers to all populations of organisms living in a defined area?

Community Signup and view all the answers

What is the main focus of marine ecology?

Studying interactions between organisms and their environment Signup and view all the answers

In marine ecology, what do intertidal communities refer to?

Communities living in the area affected by tides, located between the high tide and low tide marks Signup and view all the answers

What are the resources that can affect the growth of a population called?

Limiting resources Signup and view all the answers

What is the maximum number of organisms that any habitat can support known as?

Carrying capacity Signup and view all the answers

Which of the following represents an example of intraspecific competition?

Two lions fighting over a mate Signup and view all the answers

What type of interaction occurs when an organism uses a resource at the expense of another organism, resulting in reduced ability to reproduce or survive?

Competition Signup and view all the answers

Which of the following is an example of interspecific competition?

A lion competing with a leopard for territory Signup and view all the answers

What happens to the growth rate of a population as it becomes more crowded?

It decreases Signup and view all the answers

Which of the following is NOT considered a limiting resource for a population?

Predators Signup and view all the answers

In what type of interaction do two organisms live in close association and at least one of them benefits?

Symbiosis Signup and view all the answers

When does intraspecific competition occur?

When members of the same species compete for resources Signup and view all the answers

What results from interspecific competition?

A decrease in population growth rate Signup and view all the answers

What is the term for individuals of different species competing for resources?

Interspecific competition Signup and view all the answers

Which interaction occurs when one organism feeds on another?

Predator-prey interaction Signup and view all the answers

Study Notes

Ecology and Habitat

Habitat is defined as the natural environment in which an organism lives.
Niche refers to the resources (biotic and abiotic) an organism uses for survival, growth, and reproduction.

Ecology

Ecology refers to the study of the relationships between living organisms and their environment.

Community

A community refers to all populations of organisms living in a defined area.

Marine Ecology

The main focus of marine ecology is the study of marine ecosystems.
Intertidal communities in marine ecology refer to the communities that exist between the high and low tide marks.

Population Growth

Resources that can affect the growth of a population are called limiting resources.
The maximum number of organisms that any habitat can support is known as the carrying capacity.
Intraspecific competition occurs when individuals of the same species compete for resources, such as food or space.
An example of intraspecific competition is when two plants of the same species compete for water.

Interspecific Competition

Interspecific competition occurs when individuals of different species compete for resources.
An example of interspecific competition is when two different species of birds compete for food.
As a population becomes more crowded, the growth rate slows down.
Competition for resources can result in reduced reproduction or survival of one or both species.

Symbiotic Relationships

Mutualism is a type of interaction where two organisms live in close association and both benefit.
Predation is an interaction where one organism feeds on another.

Competition Results

Intraspecific competition can result in reduced growth rates or survival of individuals.
Interspecific competition can result in the exclusion of one species from a habitat.

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Description

Explore the interactions and relationships between organisms and their environment in marine ecology. Learn how these interactions impact the survival and distribution of marine organisms within a community.