3.3 - Studying Organisms in Ecosystems Flashcards

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1
Q

What is the definition of Ecological Niche?

A

The role that its members play in a community and the total range of biotic and abiotic requirements that its members need in order to survive.

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2
Q

What is the definition of a Habitat?

A

A place or area with a particular set of characteristics, both biotic and abiotic.

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3
Q

What is the definition of Range?

A

The geographical area where the population or species is found.

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4
Q

What is the definition of Climate?

A

The average weather conditions in a particular region over a period of time, usually 30 years or more.

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5
Q

How can climate be determined?

A

It can be determined by temperature and rainfall.

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6
Q

What is the definition of a Biome?

A

Ecosystem or group of ecosystems in a specific region on Earth that has a particular combination of biotic and abiotic factors.

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7
Q

What is the definition of Biodiversity?

A

The variety of species in an area and their range of behavioural, ecological, physiological, and other adaptations.

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8
Q

What is the definition of a Niche?

A

A place occupied by a species in its ecosystem and its role.

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9
Q

What is the definition of Species Richness?

A

A number of species

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10
Q

What is the definition of Limiting Factors?

A

Abiotic and biotic conditions which limit the # of individuals in a population.

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11
Q

What are the Abiotic Limiting Factors?

A
  • Not enough proper soil conditions
  • Not enough appropriate temperature
  • Not enough moisture
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12
Q

What are the Biotic Limiting Factors?

A

Competition Limits Populations

  • The size of a population can be limited by the availability of resources, such as food.
  • They may also compete for other resources, including water, sunlight, soil nutrients, shelter, mates, and breeding sites.
  • Competitions can also occur between two or more populations.
  • Sometimes, species may have similar, but not completely overlapping, niches. Both species can live in a particular area, although the density of one or more populations may be lowered by the presence of other species.
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13
Q

What is Predation?

A

A biotic interaction that involves the consumption of one organism by another.

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14
Q

What is Parasitism?

A

An interaction in which one organism (the parasite) derives it nourishments from another organism (the host) which is harmed in some way.

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15
Q

What happens during parasitism?

A
  • In parasitism, however, the host is not always permanently harmed or entirely consumed.
  • An increase in the density of the host population makes it possible for the parasites to increase in number.
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16
Q

What effect does the increased # of parasites have?

A

It reduces the hosts’ ability to survive or reproduce, and may lead to a decrease in the density of the hosts population. This can result in fluctations of parasite and host, similar to the cycles of predator and prey.

17
Q

What is an invasive species?

A

If an introduced species has no natural predators or diseases to limit their populations, this is what happens.