Trädarter bark

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Black cherry has bark with scales that resemble burnt potato chips, and evergreens such as pines and spruces have bark with broad, flat plates. The primary role of bark is protecting the inner living cells from fire, predation, and other threats. The exfoliation of bark in birches, for example, allows them to shed the lichen and moss that form on their trunks.

2014. CAB International. http://dendro.cnre.vt.edu/forsite/tait2.htm

  • Wojtech, Michael. The bark of two native trees, Benthamidia florida (flowering dogwood) and Diospyros virginiana (persimmon), splits into square blocks, resembling alligator hide.
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    There are also several tree species with colorful and attractive bark for Midwestern landscapes.

    I Sverige finns ytterligare en alart, gråalen. Bark: A Field Guide to Trees of the Northeast. Disease-causing organisms can invade through these pores, but that rarely happens.

    Bark and Wildlife

     A number of common North American trees have evolved sharp, woody projections on their outer surfaces to deter hungry animals from eating plant material.

    Examples include:

    • Red Maple (Acer rubrum): Young red maples have smooth grayish-brown trunks with lighter vertical stripes.
    • Eastern Cottonwood (Populus deltoides): Cottonwood trees showcase dark furrows with lighter stripes that add to their distinctive appearance.

    Striped bark can serve as camouflage for certain pest species while also enhancing the tree’s aesthetic appeal.

    Ecological Significance of Tree Bark

    Understanding the different types of tree bark goes beyond merely identifying their appearances; it also highlights their ecological importance.

    Bark can be broadly divided into two main layers:

    1. Phloem (Inner Bark): This layer is responsible for transporting nutrients and sugars produced during photosynthesis from the leaves to other parts of the tree.

    2. Cork (Outer Bark): The outermost layer protects against physical damage, water loss, and infections caused by pathogens.

      Hanblommorna sitter i långa hängen, medan Klibbalhonblommorna sitter i korta axlika hängen vilka efter fruktmognaden utvecklas till så kallade alkottar, blomställningar och 'kottar' är skaftade. Bladen är veckade, blanka, mörkgröna nästan runda och i spetsen urnupna, unga blad är starkt klibbiga.

      trädarter bark

      Deer strip the bark off young trees and damage it by fraying their antlers to shed the velvet coating. It tends to be thin and lacks significant texture or furrows. “Observing Nature: Learn to Identify Trees by Their Bark.” 2015. “Essential Oils from Plants.” Journal of Biotechnical and Biomedical Science 1: 4. https://www.nature.com/scitable/knowledge/library/case-study-the-glorious-golden-and-gigantic-13261308/

    3. Keeley, Jon E.

      and C. J. Fotheringham. Gråalens blad är äggformade och spetsiga.