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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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Presentation Transcript
slide2

The Design of Nature Preserves and other Protected Areas

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

slide3

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

slide5

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

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

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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Good

Not as Good

slide15

Good

Not as Good

slide16

Good

Not as Good

slide20

National Parks- Conserving Wildlife?

Bryce Canyon National Park

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Mammal Extinctions in our National Parks

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