2013 strawberry creek filling the weed shaped hole poster

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A 2012 TGIF Funded Project

TRANSCRIPT

  • Filling the weed-shaped hole: Determining an

    effective planting palette for Strawberry Creek Lauren Hallett, Nathan Bickart, Lawrence Fernandez and Katharine Suding

    Department of Environmental Science, Policy & Management, UC Berkeley

    Every year over 500 undergraduates care for Strawberry Creek by pulling the invasive ivy that

    blankets its banks. Without planting new species, this may create a weed-shaped hole that ivy

    can refill. Our goal was to select and plant species that limit ivy re-invasion.

    What we did: Species with similar traits to ivy such as similar growth rates and shade tolerance should

    be more competitive. We measured the traits of 40 species to identify plants that can compete with ivy.

    Roots Shoots Specific leaf area: Thick leaves

    last longer and are more drought

    tolerant

    Chlorophyll: Higher leaf

    chlorophyll content increases

    photosynthesis rates and growth

    Conductance: Low conductance

    means less water is lost during

    respiration

    Height: Greater height is

    associated with faster growth

    Specific root length

    & Proportion of fine

    roots : Thin roots

    have more surface

    area but are more

    fragile

    Rooting depth: Deep

    tap roots increase

    drought avoidance

    Root:shoot ratio: Higher root to shoot ratios

    decrease susceptibility to drought

    Species that clustered near ivy in multivariate

    trait-space are functionally similar to ivy. We grew these functionally-

    similar species in the

    Strawberry Creek nursery.

    And then planted them along Strawberry Creek.

    800 plants With the help of 250 volunteers

    We will keep an eye on these plants over the next year to assess how successfully they compete with ivy.

    Thanks to: Jesse Fried and Martin Alexander for long hours measuring traits, Tim Pine and the Strawberry

    Creek Restoration Program for guidance and planting support and Katherine Walsh for logistical help.

    Ivy

    Ivy