1 / 29

Biogeography of Marine Bacteria

Biogeography of Marine Bacteria Francisco Rodríguez-Valera Universidad Miguel Hernandez Alicante, Spain Biogeography is the study of the geographical distribution of species Cosmopolitan-widespread geagraphic distribution Endemic-only found at certain geographical areas Baas-Becking (1934)

benjamin
Télécharger la présentation

Biogeography of Marine Bacteria

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Biogeography of Marine Bacteria Francisco Rodríguez-Valera Universidad Miguel Hernandez Alicante, Spain

  2. Biogeography is the study of the geographical distribution of species • Cosmopolitan-widespread geagraphic distribution • Endemic-only found at certain geographical areas

  3. Baas-Becking (1934) • Alles is overal maar het milieu selecteert • All is everywhere but the environment select

  4. Prediction • Similar habitats will harbour similar populations regardless of location • Highly relevant for biodiversity studies

  5. Some problems inherent toBaas-Becking axiom • Replacement rate under low selective pressure • Identity of habitat

  6. Problems specific to the study of bacterial biogiography • Sampling • (how many species of bacteria there are?) • Definition of bacterial species • Establishing identity and degree of relatedness

  7. Culturability of bacteria from natural environments • Planktonic marine bacteria • 1 in 103 to 105 • 50% metabolically active • Soil bacteria • 1 in 200

  8. Marine Crenarchaea

  9. ITS ITS 1500 bp 3000 bp 120 bp Spacer Region Primer 2 Primer 1

  10. ~ 420 pb ITS 16S ~ 650 pb 23S ~ 75 pb tRNA-Ile tRNA-Ala ESQUEMA DEL AMPLICÓN DE RISA DE SAR11 Zonas hipervariables

More Related