Essays about: "Per Bark"

Showing result 1 - 5 of 59 essays containing the words Per Bark.

  1. 1. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies

    University essay from SLU/Dept. of Ecology

    Author : Evelina Andersson; [2023]
    Keywords : spruce bark beetle; population dynamics; conservation areas; biodiversity; natural enemies; species richness; managed forests; woodland key-habitats; nature reserves;

    Abstract : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. READ MORE

  3. 2. Remediation of per- and polyfluoroalkyl substances (PFAS) in contaminated water by sorption to pine- and spruce bark

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Rebecka Ayranci Dahlberg; [2023]
    Keywords : Per- and polyfluoroalkyl substances; sorption; pine bark; spruce bark; ultra-short-chain PFAS; short-and long-chain PFAS; elemental analysis; field-test;

    Abstract : PFAS are anthropogenic substances used in many different industrial operations and products because of their unique properties. Due to their negative impact on human health and environmental bioaccumulative characteristics different authorities have addressed the issue. In Sweden the limit is4 ng/L for four different PFAS in drinking water. READ MORE

  4. 3. Vilken effekt har specialsortiment på skördares produktivitet och bränsleförbrukning?

    University essay from SLU/Department of Forest Biomaterials and Technology (from 131204)

    Author : Johanna Abrahamsson; [2023]
    Keywords : Kortvirkesmetoden; Aptering; Slutavverkning; Stocklängder; Antal sortiment;

    Abstract : Det svenska skogsbruket är uppbyggt kring att skördare apterar träd till önskade stocklängder i skogen. Vilken längd som apteras fram beror på flertalet faktorer, bl.a.; industriernas önskemål, val av apteringsberäkning och skogsbeståndets egenskaper. READ MORE

  5. 4. REMOVAL OF PFAS FROM WASTEWATER THROUGH ADSORPTION AND SORBENT INCINERATION

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Aston Sandblad; [2022]
    Keywords : PFAS; Adsorption; Incineration;

    Abstract : Per- and polyfluoroalkyl substances, PFAS, are a manufactured group of chemicals that have been found to be toxic to humans and the environment. Exposure to PFAS may include birth defects for infants as well as an increased risk of cancer. READ MORE

  6. 5. Fröträdens överlevnad tre år efter skogsbranden i Västmanland 2014

    University essay from SLU/School for Forest Management

    Author : Daniel Söderberg; [2022]
    Keywords : tall; vitalitet; mortalitet; brand;

    Abstract : Efter den stora skogsbranden i Västmanland 2014 avverkades drygt 4 000 ha skog i området, varav fröträd friställdes på ca 150 ha. Tre år efter branden väcktes intresset för en inventering av dessa fröträd för att se var fröträd lämnats och vilken mängd de utgjorde avseende antal, volym och medelstam. READ MORE