Criteria voor de beoordeling van de lokale staat van instandhouding van de Natura2000 habitattypen in Vlaanderen

Are historical land‐use patterns and chemical soil characteristics complementary for assessing the restoration potential of Nardus grassland?

“…The accuracy quantifies the ratio of correct predictions relative to the total amount of predictions. These performance metrics were determined post-hoc based on a threshold of minimally three and four predicted Nardus indicator species respectively, out of a total of 12 listed by Oosterlynck et al, 2020Oosterlynck et al, . et al, 2017, factors explaining the plant community niche have to be predominantly integrated in the model (Elith et al, 2006;Öster et al, 2009).…”

“…Relevant landscape characteristics (model 1) were determined in a 10 m × 10 m resolution grid, and the same grid extent and resolution were used to predict the potential number of Nardus grassland indicator species and its 95% confidence interval (CI). Habitat patches with a favorable conservation status require at least four indicator species(Oosterlynck et al, 2020), and this threshold was used to delineate high-priority zones for conservation and habitat restoration. Additionally, a lowerpriority zone was delineated based on a threshold of up to three or four Nardus grassland indicator species, which coincided with the intersection of the sensitivity and specificity.…”

Assessment of current and future invasive plants in protected dune habitats of the Atlantic coastal region

“…Feasibility assessment for eradication (criteria on Y axis, number of respondents on X axis) of Crocosmia crocosmiiflora, and xample of a species with clear knowledge gaps. (Humid dune slacks, n=204) for the relevant indicators form evaluation matrices version 3 (Oosterlynck et al 2020) on the left, grouped in pressures and vegetation indicators on the right (Paelinckx et al 2019). Estimates of the proportion of sampling points in favourable condition are shown as coloured dots (red, green, and grey) according to their relation to the 25% threshold (dashed vertical line).…”

“…Table 10. Overview of the criteria for assessing the conservation status of NATURA2000 coastal dune habitats in Flanders relating to invasive alien species (IAS) and other (non considered invasive) alien species (OAS), version 3 (Oosterlynck et al 2020). Table 11.…”

“…Evaluation in terms of good or bad conservation status is based on matrices with a set of indicators and accompanying threshold values for each habitat (Oosterlynck et al 2020).…”