Essays about: "Bioturbation"

Showing result 1 - 5 of 11 essays containing the word Bioturbation.

  1. 1. Nanoplastic transport in soils by advection and bioturbation

    University essay from SLU/Dept. of Soil and Environment

    Author : Wiebke Mareile Heinze; [2019]
    Keywords : column leaching; attachment efficiency; exposure; mixing rates; modelling;

    Abstract : Micro- and nanoplastics are increasingly perceived as an emerging threat to ecosystems. They are emitted to soils through different pathways, including sewage sludge or compost applications in agriculture, or through tire abrasion and degradation of mismanaged waste. READ MORE

  2. 2. Methane flux in the Doñana wetlands : Waterbird guano addition and benthicinvertebrate effects

    University essay from

    Author : Noa Ratia; [2019]
    Keywords : aquatic invertebrates; bottom-up effects; CH4; Doñana; greenhouse gases; mesocosm; methane; sediment cores; akvatiska evertebrater; bottom-up effekter; CH4; Doñana; mesokosm; metan; sedimentkärnor; växthusgaser;

    Abstract : Wetlands are globally important biogeochemical hotspots, and their roles as either significant sources of greenhouse gas or carbon sinks are strongly controlled by environmental drivers such as carbon, nitrogen, and phosphorus availability, which can stimulate emission of three greenhouse gases: nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4). Mounting evidence suggests that aquatic invertebrate activity can enhance wetland greenhouse gas flux, through bioturbation and bioirrigation of surrounding sediments. READ MORE

  3. 3. Effects of meiofauna and cable bacteria on oxygen, pH and sulphide dynamics in Baltic Sea hypoxic sediment

    University essay from Stockholms universitet/Institutionen för ekologi, miljö och botanik

    Author : Johanna Hedberg; [2019]
    Keywords : Meiofauna; Bioturbation; Cable bacteria; Sediment; Oxygen; pH; Sulphide; Meiofauna; Bioturbation; Kabelbakterier; Sediment; Syre; pH; Sulfid;

    Abstract : .... READ MORE

  4. 4. Orsaker till säsongsvariation av arsenik i Lillesjön

    University essay from SLU/Dept. of Soil and Environment

    Author : Jacob Areskog; [2016]
    Keywords : förorenad sjö; anaerob mekanism; restaurering; Giftfri miljö; bioturbation;

    Abstract : Sweden has established 16 environmental quality objectives to attain a sustainable development, one of them is A Non-Toxic Environment. The county administrative board of Jönköping is working together with Nässjö county in harmony with the directions from the environmental quality objective to remediate the contaminated area in Grimstorp, Nässjö county. READ MORE

  5. 5. Palaeoenvironments of the Earliest (Middle Devonian) Tetrapod Trackways from the Holy Cross Mountains, Poland;Locomotion in a Terrestrial Setting?

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Martin Qvarnström; [2015]
    Keywords : Tetrapods; palaeoenvironment; trackways; paleosols; microfacies; trace fossils; fin-limb transition; Holy Cross Mountains; Tetrapoder; palaeomiljöer; spårfossil; microfacies; fin-limb transition; Holy Cross Mountains;

    Abstract : The palaeoenvironment from which early tetrapods emerged is crucial to comprehend in order to understand the mechanisms that drove and allowed the terrestrialization of vertebrates; one of the most important evolutionary ‘events’ in the history of animals. Nevertheless, much of the terrestrialization is shrouded in obscurity, inter alia, due to scarcity of early tetrapods in the fossil record. READ MORE