In: Journal of Hydrology and Hydromechanics, vol. 68, no. 3
Giora J. Kidron - Abraham Starinsky
Detaily:
Rok, strany: 2020, 293 - 301
Jazyk: eng
Kľúčové slová:
Cyanobacteria; Dew; Lichens; Magnesium; Potassium; Negev Desert.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
Rock dwelling organisms (lithobionts) such as cyanobacteria (prokaryotes) and chlorolichens (eukaryotes)
abound in the Negev Desert, where they cover almost all calcareous bedrocks and rock particles (cobbles, boulders). In a
small limestone watershed in the Negev Highlands, cyanobacteria inhabit the south-facing (SF) bedrocks, epilithic
lichens (accompanied by endolithic lichens) inhabit the north-facing (NF) bedrocks, while endolithic lichens cover most
of the cobbles and boulders in both aspects. In order to study their contribution to runoff water, a pair of runoff plots was
established on habitats with cyanobacteria, endolithic lichens, and epilithic lichens. Rain and runoff were collected
during the hydrological year 2006/07, and the chemical composition (Ca, Mg, Na, K, Cl, SO4, HCO3, Si) of the rain and
runoff water was analyzed. Several patterns were observed: (a) as indicated by Si, more dust accumulated on the
bedrocks; (b) all substrates exhibited high amounts of Ca, and HCO3; (c) while SF-bedrocks showed enrichment in K,
both bedrocks (and especially the NF bedrocks), as well as the NF boulders showed an enrichment in Mg. While the
enrichment in Ca and HCO3 can be explained by the contribution of the limestone parent material, the enrichment in K
and Mg can be explained by the contribution of the living lithobionts, with K being mainly contributed by the
cyanobacteria and Mg mainly by the epilithic lichens. Ion enrichment may therefore be aspect-dependent, reflecting the
lithobiont distribution within the drainage basin, partially explaining the enrichment in K and Mg previously recorded in
runoff water from the Negev.
Ako citovať:
ISO 690:
Kidron, G., Starinsky, A. 2020. Lithobiont-dependent ionic composition in runoff water. In Journal of Hydrology and Hydromechanics, vol. 68, no.3, pp. 293-301. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2020-0014
APA:
Kidron, G., Starinsky, A. (2020). Lithobiont-dependent ionic composition in runoff water. Journal of Hydrology and Hydromechanics, 68(3), 293-301. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2020-0014
O vydaní:
Vydavateľ: VEDA, Publishing House of the Slovak Academy of Sciences, Bratislava, Slovakia
Publikované: 15. 9. 2020