Countries of Occurrence:
Portugal - Azores
Nunes, R. & Lamelas-Lopez, L.
Facilitators / Compilers/s:
Hadena azorica is a single island endemic species present in S. Jorge island (Azores, Portugal) (Borges et al. 2010), known from a remnant laurel forest patch at Pico das Morgadas 500 m asl. It has a very small extent of occurrence (EOO = 4 km²) and area of occupancy (AOO = 4 km²). There is a continuing decline in the EOO, AOO, extent and quality of habitat as well as the number of mature individuals as a result of major land-use changes in the last 100 years. Main recent past and ongoing threats are destruction of habitat for creation of industrial plantations of Cryptomeria japonica and pastures. Based upon the small geographic range of the species with only one location and continuing decline of its habitat area and quality, it is assessed as Critically Endangered.
Hadena azorica is a single island endemic species from S. Jorge island (Azores, Portugal) (Borges et al. 2010), known from a remnant laurel forest patch at Pico das Morgadas 500 m asl. The extent of occurrence (EOO) is 4 km² and the maximum estimated area of occupancy (AOO) is 4 km².
Probably the species is rare and only known from a single subpopulation in high altitude areas in S. Jorge island (at Pico das Morgadas).
Probably, the species is rare and only known from a single subpopulation in high elevation areas in S. Jorge island (at Pico das Morgadas, 500 m asl) but can also occurs in other places with native and naturalised plants like Caryophyllaceae. We assume that one or two broods are produced per year, and adults can be seen flying to light from June to August.
In the past, the species has probably strongly declined due to changes in habitat size and quality, mostly the creation of pastures (Triantis et al. 2010). Currently invasive plants Pittosporum undulatum and Hedychium gardnerianum are changing some of the areas and decreasing the quality of the habitat. These changes are decreasing the relative cover of endemic plants and changing the soil cover (decreasing the cover of bryophytes and ferns). Based on Ferreira et al. (2016) the habitat will further decline as a consequence of climate change (increasing number of droughts and habitat shifting & alteration)
The species is not protected by regional law. Further research is needed into its ecology and life history in order to find extant specimens. Degraded habitats should be restored and a strategy needs to be developed to address the future threat by climate change. It is necessary a monitoring plan for the invertebrate community in the habitat in order to contribute to the conservation of this species. A habitat management plan is needed and anticipated to be developed during the coming years.