This is a species living in an extreme environment. There is unregulated international trade in this species. Levels of trade are not known, but are clearly large and growing. The fungus is also threatened in some places by road and urban development and by the effects of war.
AFRICA: Algeria, Egypt, Libya, Morocco, Tunisia. ASIA: Bahrain, Iran, Iraq, Israel, Qatar, Saudi Arabia. EUROPE: Spain. Native throughout its recorded range. Inconclusive evidence suggests this species may also extend into Mauritania and Western Sahara in the west (VOLPATO ET AL., 2013), and into Oman in the east [www.squ.edu.om/Portals/33/almasar/Horizonnew207.pdf, accessed 3 October 2013]. No information about altitudinal distribution has been found.
Not known. Over 30 records from scientific sources (specimens, databases and bibliographic sources combined, excluding duplicates) from at least 1799 to January 1998, with observations in January, February, March and April. Most of the evidence used in the present study derives from collections or market purchases for scientific study. There is almost no information currently available from rural collector-suppliers, or from their commercial buyers about geographical distribution and abundance, and high quality information from such sources is necessary for evaluating threats and conservation status.
Said to be rare in Spain (MORENO ET AL., 2000). Common in the Qatar desert (AL-THANI, 2010).
MINTER (2013), using IUCN Categories & Criteria, evaluated this species as Vulnerable.
Population Trend: Decreasing
This species is associated with many other organisms. FUNGI. Achaetomium sp.; Acremonium strictum W. Gams; Alternaria alternata (Fr.) Keissl.; Aspergillus flavus Link, A. fumigatus Fresen., A. niger Tiegh., A. ochraceus G. Wilh., A. terreus Thom; Chaetomium bostrychodes Zopf, C. globosum Kunze; Cladosporium herbarum (Pers.) Link; Cochliobolus australiensis (Tsuda & Ueyama) Alcorn [as Drechslera australiensis Bugnic. ex M.B. Ellis], C. hawaiiensis Alcorn [as Drechslera hawaiiensis Bugnic. ex M.B. Ellis], C. lunatus R.R. Nelson & F.A. Haasis [as Curvularia lunata (Wakker) Boedijn], C. sativus (S. Ito & Kirub) Drechsler ex Dastur; Fusarium oxysporum Schltdl.; Melanospora zamiae Corda; Mucor circinelloides Tiegh., M. hiemalis Wehmer, M. racemosus Fresen.; Penicillium digitatum (Pers.) Sacc., P. echinulatum Raper & Thom ex Fassat.; Pleospora tarda E.G. Simmons [as Stemphylium botryosum Wallr.]; Rhizomucor miehei (Cooney & R. Emers.) Schipper; Rhizopus stolonifer (Ehrenb.) Vuill.; Setosphaeria rostrata K.J. Leonard; Sordaria sp.; Syncephalastrum racemosum Cohn ex J. Schröt.; Terfezia boudieri Chatin, T. claveryi Chatin; Ulocladium atrum Preuss, U. tuberculatum E.G. Simmons. MONERA. Bacteria indet. PLANTAE. Carex stenophyllum Wahlenb.; Helianthemum ledifolium (L.) Mill., H. lippii (L.) Dum. Cours., H. salicifolium (L.) P. Mill., Helianthemum sp. (mycorrhizal); Olea europaea L.; Zygophyllum qatarense Hadidi (mycorrhizal).
It forms mycorrhizas with a range of flowering plants. AL-WHAIBI (2009) provided a general review of desert plants and mycorrhizas. No records have been found of interactions with animals, but these are highly likely to occur. Studies in Saudi Arabia (BOKHARY & PARVEZ, 1992a; BOKHARY & PARVEZ, 1992b; BOKHARY ET AL., 1990), Egypt (MOHAWED ET AL., 2001) and Iran (JAMALI & BANIHASHEMI, 2012b) have shown that ascomata of T. nivea are associated with many other mostly ascomycetous fungi, and with bacteria. The fungi include glucophilic and halophilic species, fungi which can produce mycotoxins, and some potential plant pathogens (JAMALI & BANIHASHEMI, 2012b). Nothing seems to be known about the relationships between these species, and their ecological role. Species of Terfezia and Tirmania need a certain minimum amount of precipitation in a given year before they produce ascomata. In Kuwait, that minimum was reported to be 180 mm well distributed from October through to March (AWAMAH & ALSHEIKH, 1979). Tirmania nivea has been recorded from the following habitats: amenity & protected areas (national parks); desert (arid scrub, dunes, semi-desert).
Living in the difficult environment of dry deserts, this species is adapted to survive at levels of heat and water stress which would be very unfavourable for other fungi. As a result, it already lives in conditions near the limit for sustainable life. Climate change and global warming in particular are likely to be significant long-term threats. Deserts are ecosystems on which humans tend to place little monetary value. Habitat destruction through war, irrigation, development of recreational facilities such as golf courses, disturbance of soil (for example by tourist safaris using 4-wheel drive vehicles), construction of solar energy facilities, establishment of refugee camps, and similar developments are all likely to threaten the ecosystems where this fungus occurs. MOUBASHER (2010) reported that, in Egypt, of the two main areas known for desert truffles, one on the Mediterranean coast west of Alexandria was being destroyed by construction of factories, recreational areas, retirement homes, roads, tourist villages and similar developments, while the other, in the Sinai Peninsula was seriously disturbed by military activities. ALSHEIKH (1989) reviewed the serious and damaging impact of war on desert truffle populations in Kuwait in the 1990s, and in other parts of southwest Asia and north Africa during the 20th century. In many areas where this species occurs, social upheaval and war continue. Paradoxically, the civil unrest experienced in many countries where this fungus occurs may help to protect it: the possibility of encountering landmines is likely to deter many collectors (ALSHEIKH, 1989). Pollution is also sometimes a serious threat. The firing of Kuwait oil wells as an act of war in 1991 affected populations of desert truffles over a wide area (ALSHEIKH, 1989). Nothing is known about the effect of oil pollution in soils on these fungi, but it is likely to be long-term. Formerly, harvesting of this species as a wild crop was carried out by rural populations for sustainable local consumption, but in the past twenty years there has been a significant increase in commercial harvesting in connexion with international trade,and the impact of this has never been evaluated, although there are reports that harvesting by refugees as their sole form of income is having a negative impact on populations (VOLPATO ET AL., 2013). There has been considerable interest in the possibility of cultivating desert truffles. If that happens, there will be the danger that a few genotypes favourable to cultivation will be used, and these may swamp the wild populations resulting in a loss of genetic diversity.
There is a significant and international on-line trade in these fungi. Ascomata of Terfezia and Tirmania not identified to species level are collectively marketed on the Internet as “desert truffles”, and commercial websites exist offering them for sale. On one site the price was €35-75 per kilogram with a minimum order of 100 kilograms and a claim by the vendor that 1000 kilograms per day could be supplied [www.alibaba.com/showroom/fresh-desert-truffles.html, accessed 29 October 2013]. The trade is secretive, with no easy access to addresses, and at most only very general information about the sources of the product. The English language websites are likely to be only a small part of the total market, and much of the trade and negotiations now seems to be conducted in Arabic through social networking sites like Facebook (G. SOLIMAN, pers.comm.).
Awareness of the importance of these desert truffles is very low even at governmental level: a survey of the most recent relevant national action plans and reports for the Rio Convention on Biological Diversity [www.cbd.int/nbsap/search/default.shtml, accessed 4 October 2013] by Algeria, Bahrain, Egypt, Iran, Iraq, Israel, Kuwait, Libya, Morocco, Qatar, Saudi Arabia, Spain, Tunisia, Turkey and Yemen (all countries from which species of Tirmania - but not necessarily T. nivea - have been recorded) showed that only Morocco and Saudi Arabia had any conservation plans. Both of these countries recognized that there might be a problem of over-exploitation; Saudi Arabia also described this species as of high conservation priority, and expressed concern about unregulated harvesting and damage by off-road use of vehicles. The appropriate conservation authorities in these countries need to be made aware of the need to protect this species.
Much more information is needed about the secretive and unregulated international trade in this species.
AL-LAITH, A.A.A. Antioxidant components and antioxidant/antiradical activities of desert truffle (Tirmania nivea) from various middle eastern origins. Journal of Food Composition and Analysis 23: 15-22 (2010). AL-NAAMA, M.M., EWAZE, J.O. & NEMA, J.H. Chemical constituents of Iraqi truffles. Iraqi Journal of Agricultural Sciences ‘ZANCO’ 6 (2): 51-56 (1988). AL-NAAMA, M.M., EWAZE, J.O. & NEMA, J.H. Acid phosphatase activity of four mycorrhizal fungi. Cryptogamic Botany 4 (1): 19-22 (1993). AL-RUQAIE, I.M. Effect of different preservation methods on the quality of truffles. NutraCos 1 (4): 46-50 (2002a). AL-RUQAIE, I.M. Effect of different treatment processes and preservation methods on the quality of truffles: I. Conventional methods (drying/freezing). Pakistan Journal of Biological Sciences 5 (10): 1088-1093 (2002b). AL‐RUQAIE, I.M. Effect of different treatment processes and preservation methods on the quality of truffles: I. Conventional methods (drying/freezing). Journal of Food Processing and Preservation 30 (3): 335-351 (2006). AL-RUQAIE, I.M. Effect of treatment process and preservation method on shelf life of truffles: II. Non-conventional methods (Radiation). International Journal of Biological Chemistry 3 (3): 126-131 (2009). ALSHEIKH, A.M. Taxonomy and Mycorrhizal Ecology of the Desert Truffles in the Genus Terfezia. Oregon State University, PhD Thesis, 239 pp. (1995). ALSHEIKH, A.M. & TRAPPE, J.M. Desert truffles: the genus Tirmania. Transactions of the British Mycological Society 81 (1): 83-90 (1983). AL-THANI, R.F. Survey of macrofungi (including truffles) in Qatar. KBM Journal of Botany 1 (2): 26-29 (2010). AL-WHAIBI, M.H. Desert plants and mycorrhizae (a mini-review). Journal of Pure and Applied Microbiology 3 (2): 457-466 (2009). ATIA, A.I. Chemical evaluation of irradiated Egyptian truffles. Egyptian Journal of Radiation Sciences and Applications 18 (1): 207-220 (2005). AWAMAH, M.S. & ALSHEIKH, A. Laboratory and field study of four kinds of truffle (kamah), Terfezia and Tirmania species, for cultivation. Mushroom Science 10: 507-517 (1979). AWAMEH, M.S. & ALSHEIKH, A. Characteristics and ascospore germination of white kame (Tirmania nivea and T. pinoyi). Annales de Phytopathologie 11 (2): 223-229 (1979). BOKHARY, H.A. Desert truffles ‘al-kamah’ of the Kingdom of Saudi Arabia. I. Occurrence, identification and distribution. Arab Gulf Journal of Scientific Research, B (Agricultural and Biological Sciences) 5 (2): 245-255 (1987). BOKHARY, H.A. & PARVEZ, S. Soil mycoflora from wild desert truffle habitats in northern Saudi Arabia. Journal of Arid Environments 23 (4): 379-388 (1992a). BOKHARY, H.A. & PARVEZ, S. Soil mycoflora from truffle native areas of Saudi Arabia. Mycopathologia 118 (2): 103-107 (1992b). BOKHARY, H.A., PARVEZ, S. & SHIBL, A.M. Some spoilage microflora of desert truffles ‘al-kamah’ of the Kingdom of Saudi Arabia. Journal of Food Protection 53: 779-781 (1990). BOKHARY, H.A., SULEIMAN, A.A.A. & BASALAH, M.O. The fatty acid components of the desert truffle ‘al kamah’ of Saudi Arabia. Journal of Food Protection 52 (9): 668-669 (1989). BOKHARY, H.A., SULEIMAN, A.A.A., BASALAH, M.O. & PARVEZ, S. Chemical composition of desert truffles from Saudi Arabia. Canadian Institute of Food Science and Technology Journal 20 (5): 336-341 (1987). BOUZIANI, N. Contribution à l’Étude et à la Mise en Valeur du Potentiel Truffier de la Région Orientale du Maroc. PhD Thesis; Faculté des Sciences, Ouijda (2009). BRADAI, L., BISSATI, S. & CHENCHOUNI, H. Étude mycologique et bio-écologique de la truffe blanche du desert (Tirmania nivea Desf. Trappe 1971) dans la région de Oued M’ya (Ouargla, Sahara Algérien). Revue des Bio-ressources 3 (1): 6-14 (2013). DE ROMAN, M. The contribution of wild fungi to diet, income and health: a world review. In Progress in Mycology Springer, Netherlands. pp. 327-348 (2010). DÍEZ, J., MANJÓN, J.L. & MARTIN, F. Molecular phylogeny of the mycorrhizal desert truffles (Terfezia and Tirmania), host specificity and edaphic tolerance. Mycologia 94 (2): 247-259 (2002). EWAZE, J.O. & AL‐NAAMA, M.M. Studies on nitrogen metabolism of Terfezia spp. and Tirmania spp. New Phytologist 112 (3): 419-422 (1989). GARIBAY-ORIJEL, R., RAMÍREZ-TERRAZO, A. & ORDAZ-VELÁZQUEZ, M. Women care about local knowledge, experiences from ethnomycology. Journal of Ethnobiology and Ethnomedicine 8: 25 (2012). [DOI: 10.1186/1746-4269-8-25; http://www.ethnobiomed.com/content/8/1/25, accessed 4 October 2013] GOUZI, H., BELYAGOUBI, L., ABDELALI, K.N. & KHELIFI, A. In vitro antibacterial activities of aqueous extracts from Algerian desert truffles (Terfezia and Tirmania, ascomycetes) against Pseudomonas aeruginosa and Staphylococcus aureus. International Journal of Medicinal Mushrooms 13 (6): 553-558 (2011). HAWKER, L.E. British hypogeous fungi. Philosophical Transactions of the Royal Society of London Series B 237: 429-546, 29 figs (1954). HIFNAWY, M., AZZAM, S., SOLIMAN, S., SHAHEED, L. & LATIF, S.A. Egyptian desert truffles, androgenic natural product, possibility of abusing in sport. In W. SCHÄNZER, H. GEYER, A. GOTZMANN & U. MARECK-ENGELKE [eds] Recent Advances in Doping Analysis 9: 299-303 (2001). HUSSAIN, G. & AL-RUQAIE, I.M. Occurrence, chemical composition, and nutritional value of truffles: an overview. Pakistan Journal of Biological Science 2 (2): 510-514 (1999). IBRAHIM, N.A. & SAEED, A.A. Protein content and amino acid analysis of the desert truffles. Annals of Agricultural Science Moshtohor 32 (3): 1569-1573 (1994). JAMALI, S. & BANIHASHEMI, Z. Hosts and distribution of desert truffles in Iran, based on morphological and molecular criteria. Journal of Agricultural Science and Technology 14 (6): 1379-1396 (2012). JAMALI, S. & BANIHASHEMI, Z. Fungi associated with ascocarps of desert truffles from different parts of Iran. Journal of Crop Protection 1 (1): 41-47 (2012). KHABAR, L. Études Pluridisciplinaires des Truffes du Maroc et Perspectives pour l’Amélioration de Production des “Terfess” de la Forêt de la Mamora. PhD Thesis, Faculté des Sciences, Rabat (2002). KHANAQA, A. Truffle production in the Kingdom of Saudi Arabia – potential and limitation. Journal of Applied Botany and Food Quality 80 (1): 14-18 (2012). LÆSSØE, T. & HANSEN, K. Truffle trouble: what happened to the Tuberales? Mycological Research 111 (9): 1075-1099 (2007). LATTIF, A. & ATIA, A.I. Nutritive value of irradiated Egyptian truffles. Egyptian Journal of Radiation Sciences and Applications 18 (1): 193-206 (2005). LOIZIDES, M., HOBART, C., KONSTANDINIDES, G. & YIANGOU, Y. Desert truffles: the mysterious jewels of antiquity. Field Mycology 13 (1): 17-21 (2012). MALENÇON, G. Champignons hypogés du nord de l’Afrique - 1 Ascomycètes. Persoonia 7 (2): 261-279 (1973). MANDEEL, Q.A. & AL-LAITH, A.A. Ethnomycological aspects of the desert truffle among native Bahraini and non-Bahraini peoples of the Kingdom of Bahrain. Journal of Ethnopharmacology 110 (1): 118-129 (2007). MINTER, D.W. Tirmania nivea. IMI Descriptions of Fungi and Bacteria No. 1979 (2013). MOAWAD, H., ALI, M.I.A., EL-SAIDI, M.T. & ABU-SHANAB, R.A.I. Survey of edible hypogeous ascomycotina of Egypt. African Journal of Mycology and Biotechnology 5 (1): 1-12 (1997). MOHAWED, S.M., BADRAN, R.A.M. & EL-KHOLY, H. Incidence of fungal species naturally occurring in truffle resources. Egyptian Journal of Microbiology 36 (1): 1-17 (2001). MORENO, G., DÍEZ, J. & MANJÓN, J.L. Picoa lefebvrei and Tirmania nivea, two rare hypogeous fungi from Spain. Mycological Research 104 (3): 378-381 (2000). MORGAN, A. Use of Extracts of Pezizaceae in the Prevention and/or Treatment of Senile Cataracts. U.S. Patent Application 13/205,693, filed August 9, 2011 (2011). MOUBASHER, A.H. Endangered desert truffles in Egypt and neighbouring Arab countries, with further notes on their distribution. Mycologia Balcanica 7 (1): 59-64 (2010). MOUSTAFA, A.F. Taxonomic studies on the fungi of Kuwait. III. Ascomycotina (plectomycetes and discomycetes). Journal of the University of Kuwait 12: 79-100 (1995). MURCIA, M.A., MARTÍNEZ‐TOMÉ, M., VERA, A., MORTE, A., GUTIERREZ, A., HONRUBIA, M. & JIMÉNEZ, A.M. Effect of industrial processing on desert truffles (Terfezia claveryi Chatin and Picoa juniperi Vittadini): proximate composition and fatty acids. Journal of the Science of Food and Agriculture 83 (6): 535-541 (2003). OMER, E.A., SMITH, D.L., WOOD, K.V. & EL-MENSHAWI, B.S. The volatiles of desert truffle: Tirmania nivea. Plant Foods for Human Nutrition 45 (3): 247-249 (1994). PACIONI, G., FRIZZI, G., MIRANDA, M. & EL-KHOLY, H.K. Allozyme characterization of some terfeziaceous fungi (Pezizales, Ascomycotina). Mycotaxon 61: 427-432 (1997). PATEL, S. Food, health and agricultural importance of truffles: A review of current scientific literature. Current Trends in Biotechnology and Pharmacy 6 (1): 15-27 (2012). PEGLER, D.N. Useful Fungi of the World: the ‘Poor man’s truffles of Arabia’ and ‘Manna of the Israelites’. Mycologist 16 (1): 8-9 (2002). SAWAYA, W.N., AL-SHALHAT, A., AL-SOGAIR, A. & AL-MOHAMMAD, M. Chemical composition and nutritive value of truffles of Saudi Arabia. Journal of Food Science 50 (2): 450-453 (1985). SHAVIT, E. Truffles roasting in the evening fires - pages from the history of desert truffles. Fungi 1 (3): 18-23 (2008). [http://fungimag.com/Truffle-Issue-08-articles/6_Medicinal.pdf] SLAMA, A., FORTAS, Z., NEFFATI, M., KHABAR, L. & BOUDABOUS, A. Taxonomic study of some truffles (Terfeziaceae) from southern Tunisia. Bulletin de la Société Mycologique de France 122 (2-3): 187-195 (2006). SLAMA, A. & NEFATTI, M. Les truffes de la Tunisie méridionale: étude écologique et mycologique. Revue des Régions Arides 15: 3-51 (2004). TRAPPE, J.M., CLARIDGE, A.W., ARORA, D. & SMIT, W.A. Desert truffles of the Kalahari: ecology, ethnomycology and taxonomy. Economic Botany 62 (3): 521-529 (2008). VOLPATO, G., ROSSI, D. & DENTONI, D. A reward for patience and suffering: ethnomycology and commodification of desert truffles among Sahrawi refugees and nomads of Western Sahara. Economic Botany 67 (2): 147-160 (2013).