Rock slabs were placed from 1991 through 2006 at the bottom of a north- (NFS) and a south-facing (SFS) slope of a first order drainage basin in the Negev Desert Highlands, Israel (P = 95 mm) where natural cobbles have >95% cover of endolithic and epilithic lichens. Periodic measurements of rain, dew and chlorophyll content took place. Lichen cover and the regeneration time were aspect-dependent. Lichen cover was 98% and 61% at NFS and SFS, respectively, while the lichen's recovery time was respectively ~45 and ~80 years. The fast regeneration time may have important implications regarding weathering and soil formation.
Bibliographical noteFunding Information:
The study was supported by grant 1358/04 of the Israel Science Foundation (ISF). We would like to warmly thank Avraham Starinsky for his support, making the research available, Shimon Tal for technical assistance and Carol A. Kidron for the editing.
- Growth rate
- Ichen cover
- Negev Desert
ASJC Scopus subject areas
- Environmental Chemistry
- Environmental Science (all)
- Earth and Planetary Sciences (miscellaneous)