Abstract
Microbiotic crusts are a common and widespread feature of arid and semi-arid landscapes. Their effect on vascular plant success has been discussed controversially. However, only very few field studies have yet tried to experimentally investigate the effect of microbiotic crusts on vascular plant establishment.
In this study we investigate the influence of cyanobacteria dominated microbiotic soil surface crust on vascular plants in a desert sand dune area by using a series of manipulative experiments. Crusts were disturbed and removed and density response to these treatments was monitored during the two following years.
Emergence densities of vascular plants were considerably higher when crusts were removed and destroyed. This effect was particularly pronounced when the disturbances were applied before the main seed dispersal period. By experimentally preventing seed dispersal into disturbed areas we could show that undisturbed crusts reduce the probability for seeds to come to rest. This indicates that soil surface roughness is a major determinant for the establishment of vascular plants in the study area. We conclude that small-scale and well-timed disturbances of microbiotic crusts in arid lands may increase vascular plant establishment probabilities. A potential feedback process of long-term vegetation dynamics is suggested: disturbance of microbiotic crusts results in higher numbers of emerging plants, which in turn represent a rough seed-trapping element leading to a further increase in densities in consecutive years.
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References
Allgaier, A. 1993. Geomorphologische Untersuchungen an Längsdünen in der westlichen Negev, Israel. Magisterarbeit, Rheinisch-Westfälische Technische Hochschule, Aachen.
Anderson, C. A., Harper, K. T. & Rushforth, S. R. 1982a. Recovery of cryptogamic soil crusts from grazing on Utah winter ranges. J. Range Manag. 35: 355–359.
Anderson, D. C., Harper, K. T. & Holmgren, R. C. 1982b. Factors influencing development of cryptogamic soil crusts in Utah deserts. J. Range Manag. 35: 180–185.
Belnap, J. 1995. Surface disturbance: Their role in accelerating desertification. Environ. Monit. Assessment 37: 39–57.
Belnap, J. & Harper, K. T. 1995. Influence of cryptobiotic soil crusts on elemental content of tissue of two desert seed plants. Arid Soil Res. Rehabilit. 9: 107–115.
Belnap, J. & Gillette, D. A. 1998. Vulnerability of desert biological crusts to wind erosion: the influences of crust development, soil texture, and disturbance. J. Arid Environ. 39: 133–142.
Beymer, R. J. & Klopatek, J. M. 1992. Effects of grazing on cryptogamic crusts in pinyon-juniper woodlands in Grand Canyon National Park. Am. Midland Nat. 127: 139–148.
Booth, W. E. 1941. Algae as pioneers in plant succession and their importance in erosion control. Ecology 22: 38–46.
Danin, A., Bar-Or, Y., Dor, I. & Yisraeli, T. 1989. The role of cyanobacteria in stabilization of sand dunes in southern Israel. Ecologia Mediterranea XV: 55–64.
Cooke, R., Warren, A. & Goudie, A. 1993. Desert Geomorphology. UCL Press Limited, London.
Eldridge, D. J. 1993. Cryptogams, vascular plants, and soil hydrological relations: some preliminary results from the semiarid woodlands of eastern Australia. Great Basin Nat. 53: 48–58.
Eldridge, D. J. & Greene, R. S. B. 1994. Microbiotic soil crusts: A review of their roles in soil and ecological processes in the rangelands of Australia. Aust. J. Soil Res. 32: 389–415.
Graetz, R. D. & Tongway, D. J. 1986. Influence of grazing management on vegetation, soil structure and nutrient distribution and the infiltration of applied rainfall in a semi-arid chenopod shrubland. Aust. J. Ecol. 11: 347–360.
Harper, K. T. & Marble, J. R. 1988. A role for nonvascular plants in management of arid and semiarid rangelands. Pp. 135–169. In: Tueller, P. T. (ed.), Vegetation science applications for rangeland analysis and management. Kluwer Academic Publishers, Dordrecht.
Harper, K. T. & Pendleton, R. L. 1993. Cyanobacteria and Cyanolichens: Can they enhance availability of essential minerals for higher plants? Great Basin Nat. 53: 59–72.
Harper, K. T. & St. Clair, L. L. 1985. Cryptogamic soil crusts on arid and semiarid rangelands in Utah: Effects on seedling establishment and soil stability. Department of Botany and Range Science, Brigham Young University, Provo. Final report on BLM contract No. BLM AA 851-CTI-48, Bureau of Land Management, Utah State Office, Salt Lake City.
Isichei, A. O. 1990. The role of algae and cyanobacteria in arid lands. A review. Arid Soil Res. Rehabilit. 4: 1–17.
Johansen, J. R. 1986. Importance of cryptogamic soil crusts to arid rangelands: Implications for short duration grazing. pp 127–136. In: Tiedeman, J. A. (ed.), Short duration grazing and current issues in grazing management shortcourse. Washington State University, Kennewick, Washington.
Johansen, J. R. 1993. Cryptogamic crusts of semiarid and arid lands of North America. J. Phycol. 29: 140–147.
Johansen, J. R. & St. Clair, L. L. 1986. Cryptogamic soil crusts: Recovery from grazing near camp Floyd State Park, Utah, USA. Great Basin Nat. 46: 632–640.
Kidron, G. J. 1995. The impact of microbial crusts upon rainfallrunoff-sediment relationships on longitudinal dune slopes, Nizzana, Western Negev Desert, Israel. Ph.D. Thesis, Department of Geography and Earth Sciences. The Hebrew University of Jerusalem, Jerusalem.
Kleiner, E. F. & K. T. Harper. 1972. Environment and community organisation in grasslands of Canyonlands National Park. Ecology 53: 299–309.
Lange, O. L., Kidron, G. J., Büdel, B., Meyer, A., Kilian, E. & Abeliovich, A. 1992. Taxonomic composition and photosynthetic characteristics of the 'biological soil crusts' covering sand dunes in the western Negev Desert. Funct. Ecol. 6: 519–527.
Lesica, P. & Shelly, J. S. 1992. Effects of cryptogamic soil crust on the population dynamics of Arabis fecunda (Brassicaceae). Am. Midland Nat. 128: 53–60.
Leys, J. F. & Eldridge, D. J. 1998. Influence of cryptogamic crust disturbance to wind erosion on sand and loam rangeland soils. Earth Surface Proc. Landforms 23: 963–974.
Marble, R. J. & Harper, K. T. 1989. Effect of timing of grazing on soil-surface cryptogamic communities in a Great Basin lowshrub desert: A preliminary report. Great Basin Nat. 49: 104–107.
McIlvanie, S. K. 1942. Grass seedling establishment and productivity -overgrazed vs. protected range soils. Ecology 23: 228–231.
Metting, B. 1991. Biological surface features of semiarid lands and deserts. Pp. 257–293. In: Skujin, J. (ed.), Semiarid lands and deserts: soil resource and reclamation. Marcel Dekker, New York.
Nebecker, G. T., & St. Clair, L. L. 1980. Enhancement of seed germination and seedling development by cryptogamic soil crusts in an Atriplex confertifolia-Sarcobatus vermiculatus community. Bot. Soc. Am. Miscellaneous Ser. Publ. 158: 81.
Pfisterer, U., H.-P. Blume, & L. Beyer. 1996. Distribution pattern, genesis and classification of soils of an arid dune area in northern Negev. Z. Pflanzenernährung Bodenkunde 159: 419–428.
Prasse, R. 1999. Experimentelle Untersuchungen an Gefäß pflanzenpopulationen auf verschiedenen Geländeoberflächen in einem Sandwüstengebiet. Universitätverlag Rasch, Osnabrück.
Sokal, R. R. & Rohlf, F. J. 1995. Biometry. The principles and practice of statistics in biological research. Third edition. W. H. Freeman and Co., New York.
St. Clair, L. L., Webb, B. L., Johansen, J. R., & Nebeker, G. T. 1984. Cryptogamic soil crusts: Enhancement of seedling establishment in disturbed and undisturbed areas. Reclamation Revegetation Res. 3: 129–136.
Sylla, D. 1987. Effect of microphytic crust on emergence of range grasses. MSc-Thesis, School of renewable natural resources. The University of Arizona.
Tielbörger, K. 1997. The vegetation of linear desert dunes in the north-western Negev, Israel. Flora 192: 261–278.
Tielbörger, K. & Kadmon, R. 1997. Relationships between shrubs and annual communities in a sandy desert ecosystem: A three year study. Plant Ecol. 130: 191–201.
Tongway, D. J., & Smith, E. L. 1989. Soil surface features as indicators of rangeland site productivity. Aust. Rangelands 11: 15–20.
Tsoar, H., & Mø ller, J. T. 1986. The role of vegetation in the formation of linear sand dunes. Pp. 75–95. In: Nickling W. G. (ed.), Aeolian Geomorphology. Allen & Unwin, Boston.
West, N. E. 1990. Structure and function of microphytic soil crusts in wildland ecosystems of arid to semi-arid regions. Pp. 179–223. In: Begon, M., Fitter, A. H., & MacFadyen, A. (eds), Advances in ecological research. Academic Press, London.
Zaady, E., Gutterman, Y. & Boeken, B. 1997. The germination on mucilaginous seeds of Plantago coronopus, Reboudia pinnata, and Carrichtera annua on cyanobacterial soil crust from the Negev Desert. Plant Soil 190: 247–252.
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Prasse, R., Bornkamm, R. Effect of microbiotic soil surface crusts on emergence of vascular plants. Plant Ecology 150, 65–75 (2000). https://doi.org/10.1023/A:1026593429455
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DOI: https://doi.org/10.1023/A:1026593429455