Textbook: Chapter 20 - Landscape Dynamics Flashcards

1
Q

Border

A

The place where the edge of one vegetation patch meets the edge of another

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2
Q

Corridor

A

A strip of a particular type of vegetation that differs from the land on both sides

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3
Q

Disturbance

A

A discrete event in time that disrupts an ecosystem, community, or population, changing substrates and resource availability

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4
Q

Edge effect

A

Response of organisms, animals in particular, to environmental conditions created by the edge

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5
Q

ecotone

A

Transition zone between two strucutrally different communities; wide borders that form a transitition zone between adjoining patches

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6
Q

Edge species

A

Species that are restricted exclusively to the edge or border environment

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7
Q

Functional connectivity

A

The degree to which the landscape facilitates the movement of organisms

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8
Q

Frequency

A

In landscape ecology, the mean number of disturbances that ccur within a time interval. In community ecology, then proportion of ample plots in whic a species occurs relative to the total number of sample plots; the probability of finding the spcies in any one sample plot

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9
Q

Filter effect

A

Corridors taht provide dispersal routes for some species but restrict the movement of others

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10
Q

Gap

A

Opening made in a forest canopy by some small disturbance such as windfall; death of an inidivudal tree or group of trees that influecnes the development of vegetation beneath

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11
Q

Intensity

A

A measure of the proportion of the totla biomass or population of a spccies that a disturbance kills or eliminates

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12
Q

Interior species

A

Organisms that require large areas of habitat, even though their home ranges may be small

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13
Q

Landscape connectivity

A

Degree to which the landscape facilitates or impedes the movement of organisms among patches; comprised of functional and structural connectivity

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14
Q

Landscape ecology

A

Study of structure, function and change in a heterogenous landscape composed of interacting ecosystems

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15
Q

Matrix

A

The communities that surround a patch on the alndscape

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16
Q

Metacommunitiy

A

Set of local communities that are linked by the dispersal of mulitple potentially interacting species

17
Q

Mosaic

A

A pattern of patches, corridors and matrices in the landscape

18
Q

Patch

A

An area of habitat that differs from its surroundings and has sufficient reosurce to allow a population to persist

19
Q

Structural connectivity

A

Degree to which patches on a landscpae are contiguous or physically linked to one another

20
Q

Shifting mosaic

A

Constnatly changing pattern of patches as each patch passes through successive stages of development

21
Q

Scale

A

Level of resolution within the dimensions of time and space; spatial proportion as a ratio of length on amap to acutal length

22
Q

Theory of island biogeography

A

Theory stating that the number of species established on an island represents a dynamic equilibrium between the immigration of new colonizing species and the extincition of previously established ones