The Design of Nature Preserves and other Protected Areas
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The Design of Nature Preserves and other Protected Areas. The Design of Nature Preserves and other Protected Areas. Remember: in our section on fragmentation of habitat there were important size and shape concerns. Six Fundamental Design Features for Preserves.

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The Design of Nature Preserves and other Protected Areas

Remember: in our section on fragmentation of habitat there were important size and shape concerns


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Six Fundamental Design Features for Preserves

1. A large preserve will hold more species than a small preserve.

Why?

Pygmy Marmoset

Remember- species area effect from Chapter 5


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A. Larger preserves tend to contain a wider range of environmental conditions

B. Large preserves are more secure than small reserves for 3 reasons

1.) they have relatively larger populations that are less likely to go extinct

2.) they have a relatively shorter edge than small preserves

3.) they are less vulnerable to a catastrophic event


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2. A single large preserve is preferable to several small reserves of equal total area.

Why?

Blue Poison Frog


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68 ha reserves of equal total area.

Original area = 100 ha

62 ha

28 ha

28 ha

Original area = 2 plots

of 50 ha each

Original area= 100 ha

Interior Zones:

given an edge width of 100 m


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3. If it is necessary to have multiple small preserves, they should be as close together as possible.

Why?

Elk

Remember the concept of a metapopulation from chapter 3



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5. Connecting the preserves with corridors will make dispersal easier for many species.

Why?

Duh


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100 ha dispersal easier for many species.

Edge= 3545 m

50 ha

50 ha

100 ha

Total Edge = 5013 m

Edge = 4243 m

6. By making preserves as circular as possible, dispersal within the preserve will be enhanced and the negative effects of edge will be minimized


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Not as Good dispersal easier for many species.

Good


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Not as Good dispersal easier for many species.

Good


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Good dispersal easier for many species.

Not as Good


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Good dispersal easier for many species.

Not as Good


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Good dispersal easier for many species.

Not as Good


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Not as Good dispersal easier for many species.

Good


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National Parks- Conserving Wildlife? dispersal easier for many species.

Bryce Canyon National Park


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Mammal Extinctions in our National Parks dispersal easier for many species.

Park Name Established Extinct Mammals

Bryce Canyon 1923 White-tail Jack Rabbit

Red Fox

Spotted Skunk

Lassen Volcanic 1907 Nuttal’s Cottontail

Spotted Skunk

Fisher

River Otter

Ringtail

Mount Ranier 1899 Gray Wolf

Fisher

Striped Skunk

Lynx


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