Počet záznamů: 1
Microbial and geo-archaeological records reveal the growth rate, origin and composition of desert rock surface communities
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SYSNO ASEP 0543793 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Microbial and geo-archaeological records reveal the growth rate, origin and composition of desert rock surface communities Tvůrce(i) Wieler, N. (IL)
Erickson Gini, T. (IL)
Gillor, O. (IL)
Angel, Roey (BC-A) RID, ORCIDZdroj.dok. Biogeosciences. - : Copernicus - ISSN 1726-4170
Roč. 18, č. 11 (2021), s. 3331-3342Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova biological soil crusts ; Negev desert ; hot ; cyanobacterial ; colonization ; carbonates ; signature ; sequences ; search ; Israel Vědní obor RIV EE - Mikrobiologie, virologie Obor OECD Microbiology CEP LM2015075 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy EF16_013/0001782 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora BC-A - RVO:60077344 UT WOS 000661088300003 EID SCOPUS 85107973905 DOI 10.5194/bg-18-3331-2021 Anotace Biological rock crusts (BRCs) are ubiquitous features of rock surfaces in drylands composed of slow-growing microbial assemblages. BRC presence is often correlated with rock weathering, soiling effect or mitigating geomorphic processes. However, their development rate is still unknown. In this work, we characterised and dated BRCs in an arid environment, under natural conditions, by integrating archaeological, microbiological and geological methods. To this end, we sampled rocks from a well-documented Byzantine archaeological site and the surrounding area located in the central Negev, Israel. The archaeological site, which is dated to the fourth to seventh centuries CE, was constructed from two lithologies, limestone and chalk. BRC started developing on the rocks after being carved, and its age should match that of the site. Using stable carbon and oxygen isotope ratios, we confirmed the biogenic nature of the crusts. The BRC samples showed mild differences in the microbial community assemblages between the site and its surroundings, irrespective of lithology, confirming the dominance of aeolian inoculation sources. All BRCs were dominated by Actinobacteria, Cyanobacteria and Proteobacteria. We further measured the BRC thickness on 1700-year-old building stone blocks and determined it to be 0.1-0.6 mm thick. Therefore, a BRC growth rate was estimated, for the first time, to be 0.06-0.35 mm kyr(-1). Our dating method was then validated on a similar archaeological site located ca. 20 km away, giving comparable values. We propose that BRC growth rates could be used as an affordable yet robust dating tool in archaeological sites in arid environments. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2022 Elektronická adresa https://bg.copernicus.org/articles/18/3331/2021/bg-18-3331-2021.pdf
Počet záznamů: 1