Concepts on Patterns ofDistribution and BiodiversityBaldeo, Cortez, Delos Santos, Olivar,
Concepts on Patterns ofDistribution
1. No two species are identical in their patterns ofdistributionBoth species occupy the sametree. (A) Apteryx australisocc...
Global patterns of terrestrial vertebrate diversity analyzed in the study. Each of the 32 bioregions is coloredby its vert...
2. Causes of pattern vary according to the taxonomiclevelDistribution of theAsteraceae FamilyDistribution of theHelianthus...
3. Causes of patterns also vary with the spatial scale
4. Factors in patterns of distributionGeological historyClimateAvailability of food Chemistry of EnvironmentCompetition
5. Species introduction led to new patterns ofdistributionMacropus eugenii was thought to be extinct in Australiafor 100 y...
6. Spatial and temporal isolation leads to speciation
7. Migration constitutes a special kind of dynamicpatternAncient human migration patterns as derived from mitochondrial DN...
Concepts on Patterns ofBiodiversity
8. Biodiversity means the full range of life on earthGenetic DiversityEcosystem DiversitySpeciesDiversity
9. Knowledge on global diversity must be established toappreciate the increasing extinction rate of species• Since there i...
10. Out of the 30 million species on Earth, only 1.8million species have been described(Groombridge, 1992)
11. The tropics have the highest species diversityLatitudinal gradients of species richness for swallow tail butterflies i...
12. Diversity involves species richness and evennessand generally increases during the course of successionIncreasing dive...
13. Biodiversity in a community is dynamic but thereare also stabilizing forces at work• Neutral Theory of Biodiversity (H...
14. There is a tendency for human populations to bedense in biodiversity hotspots.The Crete Island in Greecea. supported h...
Upcoming SlideShare
Loading in …5
×

Patterns of biodiveristy

583 views

Published on

Reference: Cox and Moore's Biogeography (7th ed.)

Published in: Education, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
583
On SlideShare
0
From Embeds
0
Number of Embeds
17
Actions
Shares
0
Downloads
18
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide
  • http://thepimmgroup.org/1122/research-article-in-plos-open-access-science-journal-explains-global-biodiversity-patterns/
  • Shell genus: Turbonilla 
  • L: ivory-billed woodpecker R: Tamar wallaby
  • Patterns of biodiveristy

    1. 1. Concepts on Patterns ofDistribution and BiodiversityBaldeo, Cortez, Delos Santos, Olivar,
    2. 2. Concepts on Patterns ofDistribution
    3. 3. 1. No two species are identical in their patterns ofdistributionBoth species occupy the sametree. (A) Apteryx australisoccupies the floor (B)Rhipidura fuliginosa occupiesthe canopy branches(A)(B)MICROHABITATconcept
    4. 4. Global patterns of terrestrial vertebrate diversity analyzed in the study. Each of the 32 bioregions is coloredby its vertebrate species richness (amphibian, reptile, bird, mammal richness combined; dark greenrepresents the lowest values and dark red represents the highest values) (Jetz & Fine, 2012)
    5. 5. 2. Causes of pattern vary according to the taxonomiclevelDistribution of theAsteraceae FamilyDistribution of theHelianthus genus
    6. 6. 3. Causes of patterns also vary with the spatial scale
    7. 7. 4. Factors in patterns of distributionGeological historyClimateAvailability of food Chemistry of EnvironmentCompetition
    8. 8. 5. Species introduction led to new patterns ofdistributionMacropus eugenii was thought to be extinct in Australiafor 100 years. But it has been rediscovered in an island inNew Zealand (2000 species) where a former governor ofthat country introduced the species in 1862.Introduction of mahogany species in the Philippines led tohectares of biodiversity-dead zones.
    9. 9. 6. Spatial and temporal isolation leads to speciation
    10. 10. 7. Migration constitutes a special kind of dynamicpatternAncient human migration patterns as derived from mitochondrial DNA analysis
    11. 11. Concepts on Patterns ofBiodiversity
    12. 12. 8. Biodiversity means the full range of life on earthGenetic DiversityEcosystem DiversitySpeciesDiversity
    13. 13. 9. Knowledge on global diversity must be established toappreciate the increasing extinction rate of species• Since there is no absolute idea on how many species existedin the first place, extinction rates are vaguely estimated• Little is known about extinction rates of microorganisms• We can rarely be sure that a species is actually lost, that noisolated members remain
    14. 14. 10. Out of the 30 million species on Earth, only 1.8million species have been described(Groombridge, 1992)
    15. 15. 11. The tropics have the highest species diversityLatitudinal gradients of species richness for swallow tail butterflies in three parts of the world. (Collin & Morris, 1985)High species diversity is due to:a. high productivity and food availabilityb. high biomass and hence complex structurec. past patterns of evolutiond. survival of fragments of habitats through the cold episodes of the last 2million yearse. degree of small-scale disturbance  mosaic of successional processes
    16. 16. 12. Diversity involves species richness and evennessand generally increases during the course of successionIncreasing diversity
    17. 17. 13. Biodiversity in a community is dynamic but thereare also stabilizing forces at work• Neutral Theory of Biodiversity (Hubbell, 2001)– Chance plays a great a great part in determining whatspecies are present in the ecosystem• Chaos Theory– Very small chance events can determine the ultimateoutcome of the ecosystem
    18. 18. 14. There is a tendency for human populations to bedense in biodiversity hotspots.The Crete Island in Greecea. supported human populations ever since the Neolithic ageb. only 245 km long by 50 km wide and isolated for 5.5 million yearsc. human population reaching 1 million yet supports a highly diversecommunity (10% of the species are endemic to the island)Anthropogenic activities lead to HABITAT DIVERSIFICATION which promotes an increasein biodiversity. There is evidence that biological diversity and human population densityare positively related over the less extreme density range. (Cox & Moore, 2005)

    ×