The Role of Alien and Native Weeds in the Deterioration of Archaeological Remains in Italy

  • Laura C
  • Blasi C
  • Celesti-Grapow L
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Abstract

BioOne (www.bioone.org) is a nonprofit, online aggregation of core research in the biological, ecological, and environmental sciences. BioOne provides a sustainable online platform for over 170 journals and books published by nonprofit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne's Terms of Use, available at www.bioone.org/page/terms_of_use. Abstract: Plants growing on ancient buildings and archaeological remains pose a severe threat to their conservation. Controlling such weeds is costly, and the use of herbicides may lead to serious ecological problems. We surveyed 20 archaeological sites in Mediterranean Italy and estimated the relative effect of alien and native weeds on archaeological remains on the basis of their abundance, frequency, and danger index (DI), which is a measure of the potential damage that each species can cause to buildings and remains. DI is assessed according to plant morphology, vigor, and life-form. The results show that, although alien plant species are potentially harmful, as revealed by their significantly higher DI, they rarely grow on remains, whereas native plants thrive. Despite human disturbance and abundant propagule supply, factors that generally enhance the establishment of aliens, the flora growing on archaeological remains was relatively resistant to alien invasion. Among the aliens observed, only tree-of-heaven turned out to be relatively harmful. Although this invasive tree is not frequent on remains, it is expected to become more widespread on them, as areas surrounding archaeological sites become increasingly urbanized. Nomenclature: Tree-of-heaven, Ailanthus altissima (Mill.) Swingle # 3 AILAL.

Author-supplied keywords

  • Additional index words
  • Biodeterioration
  • DI
  • Mediterranean Basin Abbreviations
  • danger index
  • invasion resistance

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Authors

  • Celesti-Grapow Laura

  • Carlo Blasi

  • Laura Celesti-Grapow

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