Rafiqpoor 2016; Lozan et al. 2016). Older studies on useful plants (Breckle and
Unger 1977; Breckle 1979; Breckle and Koch 1982) were a good starting point.
A continuation is planned. The Field Guide on Mosses and Liverworts of
Afghanistan is in press (Kürschner et al. 2017), a field guide on lichens is planned
(Mayrhofer et al. 2019) and an updated treatise on Afghan medicinal plants is also
planned (Keusgen et al. 2015), as well as a general treatise of Afghan biodiversity
(Breckle et al. 2018).
Fig. 42 Floristic “drainage” (decrease) in species numbers with increasing altitude in the Hindu
Kush, Caucasus, and the Alps (Breckle and Rafiqpoor 2010; Breckle et al. 2017)
46
S.-W. Breckle
Unger 1977; Breckle 1979; Breckle and Koch 1982) were a good starting point.
A continuation is planned. The Field Guide on Mosses and Liverworts of
Afghanistan is in press (Kürschner et al. 2017), a field guide on lichens is planned
(Mayrhofer et al. 2019) and an updated treatise on Afghan medicinal plants is also
planned (Keusgen et al. 2015), as well as a general treatise of Afghan biodiversity
(Breckle et al. 2018).
Fig. 42 Floristic “drainage” (decrease) in species numbers with increasing altitude in the Hindu
Kush, Caucasus, and the Alps (Breckle and Rafiqpoor 2010; Breckle et al. 2017)
46
S.-W. Breckle