干旱区生态环境知识资源中心(Arid): Atmospheric humidity is unlikely to serve as an important water source for crustose soil lichens in the Tabernas Desert

Arid

DOI	10.2478/johh-2020-0034
	Atmospheric humidity is unlikely to serve as an important water source for crustose soil lichens in the Tabernas Desert
	Kidron, Giora J.; Kronenfeld, Rafael
通讯作者	Kidron, GJ
来源期刊	JOURNAL OF HYDROLOGY AND HYDROMECHANICS
EISSN	1338-4333
出版年	2020
卷号	68 期号:4 页码:359-367
英文摘要	Dew is commonly regarded as an important water source for lichens. This is also the case for crustose lichens that are attached to the substrate, whether rocks or soil. While being verified during ample research on rock-dwelling lichens in the Negev, the findings from soil-dwelling lichens (lichen biocrusts) are not conclusive. In the Tabernas Desert, the soil surface is characterized by a lush cover of crustose lichens. These soil biocrusts (biological soil crusts) were reported to use dew for photosynthesis while, at the same time, it was also observed that these crustose chlorolichens are relatively non-wettable. In an attempt to explore the apparent controversy, two year-long meteorological data (minimum air temperature and relative humidity, RH), during which chlorolichens were thought to utilize dew for photosynthesis (2006-2007) were analyzed. The analysis includes a comparison to the meteorological conditions that prevailed in the Negev during 135 days of manual dew measurements. As found for the Negev, net photosynthesis by the chlorolichens is expected once the RH, as measured at the meteorological station, is =90% while vapor condensation (dew) is expected once RH is >= 95%. RH in the Negev was substantially higher than the average RH of 75.0-87.2% registered during the rainless days of 2006-2007 in the Tabernas, implying that RH in the Tabernas is too low to facilitate frequent dew formation and net photosynthesis by the lichens. Photosynthesis in the Tabernas is mainly confined to rainy periods, taking place either due to direct wetting by rain, or following vapor condensation from the subsurface (distillation). Our findings do not support the view that dew is an important water source for the establishment and growth of crustose soil lichens in the Tabernas. Moreover, the low RH in the Tabernas may also imply that dew may only have a very limited role in providing water to lithobionts in this ecosystem.
英文关键词	Biocrust Cyanobacteria Distillation Lithobionts Respiration Negev Desert
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000582138000007
WOS关键词	NEGEV DESERT ; WESTERN NEGEV ; SAND DUNES ; REVEGETATED AREA ; TORTULA-RURALIS ; SE SPAIN ; DEW ; BADLANDS ; BURIAL ; MOSS
WOS类目	Water Resources
WOS研究方向	Water Resources
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327106
作者单位	[Kidron, Giora J.] Hebrew Univ Jerusalem, Inst Earth Sci, Givat Ram Campus, IL-91904 Jerusalem, Israel; [Kronenfeld, Rafael] Israel Meteorol Serv, Meteorol Unit, IL-84993 Kibbutz Sede Boqer, Israel
推荐引用方式 GB/T 7714	Kidron, Giora J.,Kronenfeld, Rafael. Atmospheric humidity is unlikely to serve as an important water source for crustose soil lichens in the Tabernas Desert[J]. Hebrew University of Jerusalem,2020,68(4):359-367.
APA	Kidron, Giora J.,&Kronenfeld, Rafael.(2020).Atmospheric humidity is unlikely to serve as an important water source for crustose soil lichens in the Tabernas Desert.JOURNAL OF HYDROLOGY AND HYDROMECHANICS,68(4),359-367.
MLA	Kidron, Giora J.,et al."Atmospheric humidity is unlikely to serve as an important water source for crustose soil lichens in the Tabernas Desert".JOURNAL OF HYDROLOGY AND HYDROMECHANICS 68.4(2020):359-367.