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Defining patch mosaic functional types to predict invasion patterns in a forest landscape.

Olivier Chabrerie1, Frédéric Roulier, Hélène Hoeblich

  • 1Département de Botanique, Université de Picardie Jules Verne, Amiens Cedex, France.

Ecological Applications : a Publication of the Ecological Society of America
|May 11, 2007
PubMed
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Alien plant invasions threaten ecosystems. Identifying landscape traits that influence invasive species like black cherry (Prunus serotina) is key for management. This study defines patch mosaic functional types (PMFTs) to map invasion risks in forests.

Area of Science:

  • Ecology
  • Forestry
  • Conservation Biology

Background:

  • Alien plant invasions significantly impact global biodiversity and ecosystem functions.
  • Predicting and managing invasive species spread requires understanding landscape attributes that promote or hinder invasions.

Purpose of the Study:

  • To develop and apply a method for identifying landscape attributes that influence the invasion of a European temperate forest by American black cherry (Prunus serotina).
  • To define and map patch mosaic functional types (PMFTs) to assess invasion risk at different levels (colonization, establishment, ecosystem invasion).

Main Methods:

  • Combined landscape and functional ecology concepts to define PMFTs.
  • Utilized Geographic Information System (GIS) and multivariate analyses to correlate landscape traits with Prunus serotina abundance.

Related Experiment Videos

  • Derived and mapped a risk index for three invasion levels.

    • Main Results:

    • Identified five PMFTs, with Scots pine plantations on podzols being most invasible and hydromorphic/calcareous soils most resistant.
    • Found that colonized areas offer suitable conditions for future invasion, acting as corridors.
    • Identified resistant PMFTs acting as barriers in the southern part of the forest.

    Conclusions:

    • Developed a hierarchical classification of PMFTs based on invasion risk, applicable to heterogeneous landscapes.
    • Proposed tailored management strategies for each hierarchical level to mitigate invasion risks.
    • Recommended specific actions such as monitoring safe areas, selective harvesting, and promoting native species.