Essays about: "extinctions"

Showing result 1 - 5 of 23 essays containing the word extinctions.

  1. 1. A computational model of metapopulation dynamics and organism-mediated nutrient flow

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Author : Amanda Hansson; [2023-08-07]
    Keywords : computational model; population dynamics; metapopulation dynamics; nutrient flow; simulation; spatially explicit; individual-based;

    Abstract : The aim of this project was to assess, using in-silico experiments, how different life history char-acteristics, such as age at maturity and dispersal ability of individuals, influence the dynamics of a metapopulation. To achieve this, a novel model of a spatially explicit metapopulation, with organ-ism-mediated nutrient flow between fragmented habitat patches, was implemented by means of computer simulations. READ MORE

  3. 2. Modelling the effects of substituting pollinators in decline

    University essay from Lunds universitet/Matematik LTH

    Author : Axel Eriksson; [2023]
    Keywords : pollinators; plants; mutualism; competition; equilibrium populations; Mathematics and Statistics;

    Abstract : While pollination is essential for many plant species and ecosystem functions, pollinator populations worldwide are declining. This decline is largely due to abiotic changes in the environment: climate change and other anthropogenic impacts, such as pesticides and land use change. READ MORE

  4. 3. How does temperature affect the severity of Bd infection in the common toad (Bufo bufo)? : A test of thermal mismatch hypothesis

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Felix Fridh; [2023]
    Keywords : chytridiomycosis; amphibians; fungi; fungus; thermal mismatch hypothesis; bufobufo; common toad; Batrachochytrium dendrobatidis; Bd;

    Abstract : Batrachochytrium dendrobatidis (Bd) is a fungus that causes chytridiomycosis in amphibians. This fungus is an invasive species that has spread all over the world and is causing mass deaths in many areas. Bd has an efficient life cycle which targets suitable hosts and causes disturbances in amphibian osmoregulation and eventually death. READ MORE

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

    University essay from Lunds universitet/Geologiska institutionen

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

    Abstract : 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. READ MORE

  6. 5. Mercury in Fossil Leaves as a Proxy for Tracking Large Igneous Province Volcanism

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Johan Näslund; [2021]
    Keywords : ;

    Abstract : During some mass extinctions, usually minor, world oceans also underwent anoxic to euxinic conditions, events called Oceanic anoxic events (OAEs). Such an event unfolded during the Toarcian (∼183 Ma), called the T-OAE which is suggested to have been caused by Karoo-Ferrar Large Igneous Province (LIP) volcanism. READ MORE