This action’s objective is the detailed survey of invasive alien species found in the priority SCI habitats, starting from the list of invasive species provided in the Life project “PROVIDUNE (LIFE07NAT/IT/000519)”, in order to check and update the regional mapping with their distribution over the SCI and neighbouring areas, through field work.
The analysis of the available charts and the fieldwork will determine the distribution of the invasive populations in the “Coastal dunes with Juniperus spp.” and “Dunes with Pinus pinea and/or Pinus pinaster forest” habitats of the SCI, updating the information on the actual areas they occupy, which may well have increased.
As for the methodology, we will proceed with sample taking on the field in order to map the population and number of individuals, divided by size class (seedlings, young, adults, reproducers) and then mark in situ the surface area occupied by these populations. Perimeter coordinates will be surveyed, and we will conduct quali-quantitative surveying of the data on current and potential risks for the habitats and their native species. In particular, we will survey data on specific areas, their coordinates and information on the data’s precision level, average, minimum and maximum inclination of the dune side, exposition, rockiness, stone content, draining and coherence of the substratum.
In order to facilitate the eradication and/or control activities of action C4, our survey will provide two sets of information on the invasive species we need to map, based on the specific characteristics of the single populations. For the Carpobrotus genus we will map and mark the population perimeter on the chart, with for the Acacia and Agave genus we will also map the position of each ‘adult’ and ‘reproducer’ individual.
Each charted area and individual plant will have its own progressive ID number, and there will be a field card with the elements used to identify each species, their location (habitat, location, UTM-WGS84 coordinates via GPS tracking device), measurements (stem circumference, height, estimated age), and other descriptive elements: shape of its foliage head, health status. For faster identification, the cards will show the relevant portion of the map with the exact location point of the individual plant as well as the species’ coverage.
Pictures of the intervention area will also be provided.
The charts will also report the areas where the invasive species can potentially grow, that is the areas where we find neighbouring spots with habitats in mosaic-like distribution that cross with invasive populations, in order to focus on these areas for post-eradication checks. Specific awareness raising actions may be necessary for these areas, especially if they are private properties such as gardens of private homes or lidos or other tourist structures.
These activities will be carried out in the project’s first year and as preliminaries to C4 actions of control and/or eradication.
These will include:
• Mapping habitats in charts ranging from 1:10.000 – 1:2.000 scale, georeferenced with UTM and Gauss Boaga coordinates of the actual and potential distribution area for each invasive species;
• Mapping the population of invasive species in charts ranging from 1:10.000 – 1:2.000 scale, georeferenced with UTM and Gauss Boaga coordinates, showing the spot location and associated perimeters of adult and reproducer specimens for each invasive species;
• Field cards with surveyed data for each population, adult and reproducer specimen
• Preliminary and executive planning of Action C4.