Download presentation
Presentation is loading. Please wait.
Published byDouglas Horn Modified over 9 years ago
1
Habitat Loss Orange County, California
2
Desertification Desertification is the conversion of grassland and savanna habitat into relatively sparse, unproductive vegetation The main cause of desertification is overgrazing by livestock
4
Rio Puerco Basin NM
5
Rio Puerco Basin 18851977
6
Rio Puerco Today
7
Overgrazing – Texas and England Left good, right overgrazed
8
Wetlands Wetlands are lands that are transitional between aquatic and terrestrial ecosystems
9
Freshwater Wetland Types
10
General Locations of U.S. Wetlands
12
Crane Species 1. Eurasian Crane, 2. Black-necked crane, 3. Munktrana, 4. Sandhill Crane, 5. Whooping Crane, 6. Japanese crane, 7. White-naped Crane, 8. Sarus Crane, 9. Australian Crane, 10. Siberian Crane, 11. Wattled Crane, 12. Demoiselle Crane, 13. Blue Crane, 14. Black Crowned Crane, 15. Grey Crowned Crane
13
Grey Crowned Crane
15
Habitat Fragmentation Fragmentation is the breakdown of a habitat or ecosystem into smaller patches of that habitat or ecosystem that now are isolated from each other
16
Habitat Fragmentation
17
Island Biogeography
18
Charles Darwin and Alfred Russel Wallace
19
The Galapagos
20
Galapagos Tortoise
21
Galapagos Mockingbirds
22
Galapagos Mockingbirds collected by Darwin
23
Malay Archipelago
24
Beetles and Moths Collected by A.R. Wallace
25
Butterflies from Malay Archipelago
26
Sphingid Butterfly Diversity Malay Archipelago
27
Island Habitats in Baltic Sea
28
Reptile and Amphibian Species Area Curve for Caribbean Islands
29
Habitat Islands In the Great Basin Bird Species Mammal Species
30
Species Area Curve S = cA z where: S = number of species A = area of island c = constant for habitat type - forest, desert, grassland, etc. z = slope of curve
32
Ant species On New Guinea and Nearby Islands
33
Real Slopes for Species-Area Curves Oceanic islandsbirds - New Guinea islands z=0.22 beetles - West Indiesz=0.34 land plants - Channel Islandsz=0.37 Habitat islandsbirds - Andes paramo z=0.29 birds - mtns of Great Basin z=0.165 mammals - mtns of Great Basin z=0.326 inverts -caves in West Virginia z=0.72
34
Robert MacArthur and E.O. Wilson - originators of the Equilibrium Theory of Island Biogeography
36
Ruffed Grouse by Audubon
37
Ruffed Grouse – male mating display
38
Apostle Islands – Lake Superior
40
Krakatau – before and after 1883 eruption
42
Aerial photo of Anak Krakatau and Krakatau
43
Krakatau today
45
Mangrove islands off the Florida coast
46
Mangrove Island Close-Up
47
Dan Simberloff on Mandolin Nick Gotelli on Guitar
48
Simberloff’s defaunation experiment on Mangroves
50
Bracken Fern
51
Bracken Fern - Australia
52
Number of species found on Bracken Fern
53
Picture Winged Drosophila
54
Picture Winged Drosophila – more than 500 species from 1 ancestor
55
http://www.pbrc.hawaii.edu/research_news/
56
Cichlid Diversity
57
African Rift Lakes
58
Cichlids from Lake Tanganyika (left) and Lake Malawi (right)
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.