Sökning: "utdöendet"

Visar resultat 1 - 5 av 15 uppsatser innehållade ordet utdöendet.

  1. 1. Paleontologiska egenskaper och syreisotopsutveckling i borrkärnan Limhamn-2018: Kopplingar till klimat- förändringar under yngre krita

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Melissa Sundberg; [2022]
    Nyckelord :Klimatförändringar; maastricht; ichnofossil; bryozobiohermer; milankovitchcyklicitet; Earth and Environmental Sciences;

    Sammanfattning : Krita är onekligen en av de mest omtalade tidsåldrarna inom paleontologin, inte minst på grund av massutdöendet som innebar slutet för alla icke-flygande dinosaurier. Nya studier visar att biodiversiteten hos storvuxna fågelhöftade dinosaurier började minska tiotals miljoner år innan utdöendet. LÄS MER

  3. 2. Record of the end-Triassic mass extinction in shallow marine carbonates: the Lorüns section (Austria)

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Linus Brakebusch; [2022]
    Nyckelord :sedimentology; geochemistry; ooids; oolites; oncoids; oncolites; Triassic; Jurassic; Rhaetian; Hettangian; ocean acidification; Earth and Environmental Sciences;

    Sammanfattning : The end-Triassic mass extinction (ETE) was one of the five big mass extinctions of the Phanerozoic and occurred ~201 Ma ago. Research agrees that the main triggering factor for the ETE was the eruptions of the Central Atlantic Magmatic Volcanic Province (CAMP), linked to the break-up of the supercontinent Pangaea. LÄS MER

  4. 3. Sumatranoshörningen (Dicerorhinus sumatrensis) på gränsen till utrotning - En riskanalys

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Amanda Gagné; [2021]
    Nyckelord :Sumatran rhinoceros; risk assessment; threats; conservation; Indonesia; Earth and Environmental Sciences;

    Sammanfattning : The critically endangered Sumatran rhinoceros (Dicerorhinus sumatrensis) has, due to previous hunting and habitat loss, diminished to a few non-viable and fragmented populations. Despite a relatively large amount of conservation efforts during the last 30 years, numbers are still declining. LÄS MER

  5. 4. Oolites from the Arabian platform: Archives for the aftermath of the end-Triassic mass extinction

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Johannes Greiff; [2021]
    Nyckelord :sedimentology; carbonates; geochemistry; oolites; ooids; thrombolites; microbialites; Triassic; Jurassic; Hettangian; extinction; United Arab Emirates; Wadi Ghalilah; Wadi Milaha; Earth and Environmental Sciences;

    Sammanfattning : The end-Triassic mass extinction (ETME) which occurred around 201 Ma is known as one of “the big five” mass extinction events of the Phanerozoic eon. Its effects were most severe on marine ecosystems, resulting in a global decline of invertebrate taxa and the complete extinction of the conodonts. LÄS MER

  7. 5. Sedimentary Factories and Ecosystem Change in the Triassic-Jurassic Boundary Interval : Insights from the Skåne Area (Southern Sweden)

    Master-uppsats, Uppsala universitet/Paleobiologi

    Författare :Gustav Nesset Mattsson; [2021]
    Nyckelord :CAMP; microbial structures; End-Triassic extinction event; sedimentary structures; MISS; Triassic-Jurassic boundary; CAMP; mikrobiella strukturer; Trias-jura-utdöendet; sedimentära strukturer; MISS; Trias- juragränsen;

    Sammanfattning : The End-Triassic Extinction (ETE) has long remained one of the lesser known among the so-called “Big Five”. There exist several hypotheses regarding the probable cause of this extinction, which can mainly be divided into  events of  a decline in the rate of diversification  in the late Triassic contra a sudden and significant extinction event. LÄS MER