Demografia i conservació de Simethis mattiazzi (Liliaceae), espècie d’interès per a la flora vascular de Catalunya

Abstract

We provide new chorological, demographic, phenological, phytosociological, ecological and environmental management data of Simethis mattiazzi in Catalonia, a threatened vascular plant in the Mediterranean region. We have located 27 stands in the region of la Selva which counting give us an estimation of 176,052 individuals (22 stands). The area of occupancy is 43,594 m 2 which are distributed in 10 UTM squares of 1 km per side. Simethis is a characteristic species of Lavandulo stoechadis-Ericetum scopariae association and can be found in three different habitats (32k Erica scoparia heaths, 45b Quercus suber forests with undergrowth of acidophilous scrub and 45i Mixed forest of Q. suber and Pinus spp.), clearly preferring the 32k. However, it produces more flowers per individual in environments that are less favourable (45b and 45i). By all appearances, the predominant distribution factor in Europe and Africa is climate, which always has to be Atlantic or Submediterranean with oceanic trend. Likewise, we give conservation proposals and confirm the current IUCN status “endangered” (EN) of Simethis in Catalonia.