Disputas: Daniel Ariano-Sánchez

Daniel Ariano-Sánchez disputerer for doktorgrada i økologi. Avhandlinga undersøkjer korleis klimaendringar og habitatøydeleggingar påverkar to trua reptilartar i Mellom-Amerika: Olive Ridley-skjelpadda og den guatemalanske vorteøgla.

15 Jun

Praktisk informasjon

  • Dato: 15 juni 2023
  • Tid: kl. 10.00 - 15.00
  • Sted: Bø, rom 5-115 og Zoom
  • Last ned kalenderfil

    •  

    Program

    Kl. 10.00: Prøveforelesing: What future model-based methods should we apply to conserving seasonal tropical forests?

    Kl. 12.00-15.00:  Disputas: Impact of climate change and habitat degradation on two endangered reptiles: the Guatemalan beaded lizard and the Olive Ridley sea turtle

     

    Les avhandlinga her

     

    Sjå disputasen på Zoom her

    Meeting ID: 664 5150 1199
    Password: 453279

     

    Bedømmingskomité

    • Første opponent: Todd Lewis, Senior Lecturer, University of the West of England, Bristol
    • Andre opponent: Andres Gimenez Casalduero, professor, Universitas Miguel Hernández, Spania
    • Administrator: Mona Sæbø, førsteamanuensis, Universitetet i Søraust-Noreg
    • Disputasleder: Andrew Jenkins, professor, Universitetet i Søraust-Noreg

     

    Rettleiarar

    • Hovudrettleiar: Stefanie Reinhardt, førsteamanuensis, Universitetet i Søraust-Noreg
    • Medrettleiar: Frank Rosell, professor, Universitetet i Søraust-Noreg
Har du spørsmål?

Daniel Ariano-Sánchez skal forsvare avhandlinga si for grada philosophiae doctor (ph.d.) ved Universitetet i Søraust-Noreg.

Portrett av Daniel Ariano-Sánchez

Han har følgt doktorgradsprogrammet i økologi ved Fakultet for teknologi, naturvitskap og maritime fag ved campus Bø.

Alle interesserte er velkomne til prøveforelesing og disputas.

Samandrag

Climate change and habitat degradation are the known as the main threats to reptiles. We have studied how these threats can affect two endangered tropical species of reptiles: one venomous terrestrial lizard (Guatemalan Beaded Lizard (Heloderma charlesbogerti)) and one marine sea turtle (Olive Ridley sea turtle (Lepidochelys olivacea)). We have found that seasonality in rainfall strongly affects the movement and habitat selection of the Guatemalan Beaded Lizard, and that habitat degradation can limit the potential of this species to cope with global warming and climate change. Also, we have found that increasing air temperatures could have a dramatic negative effect on these lizards by increasing their energy expenditures related to the search of suitable thermal retreats, thus potentially affecting the resilience of this species in the long term in the context of global warming.

Regarding the Olive Ridley sea turtle, we have found that global climate patterns such as El Niño can have some effects on the reproduction of the species but that this species is somewhat resilient to climate change compared to other sea turtle species. We have also found that habitat degradation of the coastal habitat in which this species nests, could have profound effects on the thermal profile of sand thus potentially affecting the hatching success of wild nests. This highlights the relevance of vegetation and undisturbed nesting beaches in buffering the effects of climate change in the Olive Ridley population studied.

To develop ecology science of endangered species is a challenge but is a must to develop better conservation strategies. The combined results in this thesis may inform better conservation strategies for the two studied endangered model species.