Discussion on wind factor influencing the distribution of biological soil crusts on surface of sand dunes

2013 ◽  
Vol 5 (6) ◽  
pp. 739
Author(s):  
Wu YongSheng ◽  
Erdun Hasi ◽  
Yin RuiPing ◽  
Zhang Xin ◽  
Ren Jie ◽  
...  
Keyword(s):  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Soil Crusts

scholarly journals Algae of biological soil crusts from sand dunes of the Danube Delta biosphere reserve (Odesa Region, Ukraine)

Algologia ◽  
2021 ◽  
Vol 31 (1) ◽  
pp. 25-62
Author(s):  
T.I. Mikhailyuk ◽  
◽  
O.M. Vinogradova ◽  
K. Glaser ◽  
N. Rybalka ◽  
...  
Keyword(s):  
Species Composition ◽  
Phylogenetic Analyses ◽  
Sand Dunes ◽  
Biosphere Reserve ◽  
Biological Soil Crusts ◽  
Danube Delta ◽  
Climate Type ◽  
Soil Crusts ◽  
Comparison Of The Results ◽  
Danube Delta Biosphere Reserve

The species composition of algae from biological soil crusts (biocrusts) on the surface of sand dunes (Black Sea coast, Primorske, Izmail District, Odesa Region, Ukraine) was investigated. Samples were collected from three coastal localities: Katranivska Spit, Zhebryianska Bay and Zhebryianska Ridge. The latter two localities are in the territory of the Danube Delta Biosphere Reserve. The samples were investigated by direct microscopy, followed by a culture approach. 60 species from Chlorophyta (32), Cyanobacteria (16), Streptophyta (7) and Ochrophyta (5) were identified. Representatives of the cyanobacterial genera Microcoleus Desmazières ex Gomont, Coleofasciculus M.Siegesmund, J.R.Johansen & T.Friedl, Nostoc Vaucher ex Bornet & Flahault, Hassallia Berkeley ex Bornet & Flahault, and streptophytes from the genus Klebsormidium P.C.Silva, Mattox & W.H.Blackwell dominated in the studied biocrusts. Phylogenetic analyses based on 16S/18S rRNA as well as 16S-23S ITS/ITS-1,2 regions were undertaken for some strains of cyanobacteria and eukaryotic algae. As a result, species identification and their position in respective phylogeny was refined, as well as aiding the discovery of some interesting and rare species. New genera and species were described (Streptosarcina arenaria Mikhailyuk & Lukešová and Tetradesmus arenicola Mikhailyuk & P.Tsarenko); with two genera (Nodosilinea R.B.Perkerson & D.A.Casamatta and Pleurastrosarcina H.J.Sluiman & P.C.J.Blommers) and four species reported for the first time for the flora of Ukraine (Nodosilinea epilithica Perkerson & Casamatta, Pseudomuriella aurantiaca (W.Vischer) N.Hanagata, Pleurochloris meiringensis Vischer, Pleurastrosarcina terriformae Darienko, W.J.Kang, Orzechowski & Pröschold). Comparison of the results from this study with similar investigations at Cape Kazantip (Sea of Azov, Ukraine) and at two islands of the Baltic Sea (Rügen, Usedom, Germany) revealed that sand composition and texture, as well as climate type of the respective region, are the main factors determining species composition of algae and cyanobacteria in biocrusts of maritime dunes.

Algae of Biological Soil Crusts from Sand Dunes of the Danube Delta Biosphere Reserve (Odesa Region, Ukraine)

2021 ◽  
Vol 23 (1) ◽  
pp. 7-42
Author(s):  
T. I. Mikhailyuk ◽  
O. M. Vinogradova ◽  
K. Glaser ◽  
N. A. Rybalka ◽  
E. M. Demchenko ◽  
...  
Keyword(s):  
Sand Dunes ◽  
Biosphere Reserve ◽  
Biological Soil Crusts ◽  
Danube Delta ◽  
Soil Crusts ◽  
Danube Delta Biosphere Reserve

scholarly journals Topographic differentiations of biological soil crusts and hydraulic properties in fixed sand dunes, Tengger Desert

2014 ◽  
Vol 7 (2) ◽  
pp. 205-215 ◽  
Author(s):  
ZhiShan Zhang ◽  
YongLe Chen ◽  
BinXing Xu ◽  
Lei Huang ◽  
HuiJuan Tan ◽  
...  
Keyword(s):  
Hydraulic Properties ◽  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Tengger Desert ◽  
Soil Crusts

Variation of albedo to soil moisture for sand dunes and biological soil crusts in arid desert ecosystems

2013 ◽  
Vol 71 (3) ◽  
pp. 1281-1288 ◽  
Author(s):  
Ya-feng Zhang ◽  
Xin-ping Wang ◽  
Rui Hu ◽  
Yan-xia Pan ◽  
Hao Zhang
Keyword(s):  
Soil Moisture ◽  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Desert Ecosystems ◽  
Soil Crusts ◽  
Arid Desert

The Role of Biological Soil Crusts on Desert Sand Dunes in the Northwestern Negev, Israel

2001 ◽  
pp. 357-367 ◽  
Author(s):  
Maik Veste ◽  
Thomas Littmann ◽  
Siegmar-W. Breckle ◽  
Aaron Yair
Keyword(s):  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Desert Sand ◽  
Soil Crusts

Biological Soil Crusts of Sand Dunes in Cape Cod National Seashore, Massachusetts, USA

2004 ◽  
Vol 48 (2) ◽  
pp. 200-208 ◽  
Author(s):  
S.M. Smith ◽  
R.M.M. Abed ◽  
F. Gercia-Pichel
Keyword(s):  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Cape Cod ◽  
Soil Crusts ◽  
National Seashore

scholarly journals Microstructure and hydraulic properties of biological soil crusts on sand dunes: a comparison between arid and temperate climates

2012 ◽  
Vol 9 (9) ◽  
pp. 12711-12734 ◽  
Author(s):  
T. Fischer ◽  
A. Yair ◽  
M. Veste
Keyword(s):  
Water Supply ◽  
Fine Particles ◽  
Water Saturation ◽  
Higher Plants ◽  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Water Holding Capacity ◽  
Soil Crusts ◽  
Water Holding ◽  
Dune Crest

Abstract. We studied the relationships between crust microstructure, infiltration and water holding capacity under arid and temperate conditions (Factor A: Climate) on biological soil crusts (BSCs) sampled along a~catena on mobile sand dunes (Factor B: Catena). The arid study site was located near Nizzana, Israel (precipitation: 86 mm a−1, PET: ~2500 mm a−1) and the temperate site near Lieberose, Germany (precipitation: 569 mm a−1, PET: ~780 mm a−1). BSCs were sampled near the dune crest, at the centre of the dune slope and at the dune base at each site. Scanning electron microscopy (SEM) was used to characterize BSC morphology and microstructure. Infiltration was determined using microinfiltrometry under controlled moisture conditions in the lab. Water holding capacities were determined after water saturation of the dry BSCs. Wettability of the crusts was characterized using a "repellency index", which was calculated from water and ethanol sorptivities. Irrespective of the climate, an accumulation of fine particles in the BSCs was found, increasing along the catena from dune crest to dune base. Texture was finer and water holding capacities of the underlying substrate were higher at the arid site, whereas surface wettability was reduced at the temperate site. At both sites, BSCs caused extra water holding capacity compared to the substrate. Infiltration rates decreased along the catena and were generally lower at the dune slope and base of the arid site. A mechanism of crust stabilization is proposed where BSCs benefit from increased texture and biomass mediated water supply, and where the water supply to higher plants was limited due to alteration of physico-chemical surface properties under temperate conditions.

scholarly journals Mapping Surface Quartz Content in Sand Dunes Covered by Biological Soil Crusts Using Airborne Hyperspectral Images in the Longwave Infrared Region

Minerals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 318 ◽  
Author(s):  
Shahar Weksler ◽  
Offer Rozenstein ◽  
Eyal Ben-Dor
Keyword(s):  
Near Infrared ◽  
Sand Dunes ◽  
Ground Truth ◽  
Infrared Region ◽  
Biological Soil Crusts ◽  
Hyperspectral Images ◽  
Electromagnetic Spectrum ◽  
Quartz Content ◽  
Soil Crusts ◽  
Field Samples

Biological soil crusts (BSCs), composed of cyanobacteria, algae, mosses, lichens, and fungi, are important ecosystem engineers that stabilize the quartz-rich dunes in the Nitzana study area near the Israel–Egypt border. The longwave infrared (LWIR) region of the electromagnetic spectrum is very useful for quartz identification since quartz reflectance in the visible, near infrared, and shortwave infrared (VIS-NIR-SWIR, 0.4–2.5 µm) spectral regions lacks identifying features, whereas in the LWIR region, the quartz emissivity spectrum presents a strong doublet feature. This emissivity feature can be used as a diagnostic tool for BSCs development in desert environments, because BSCs attenuate the quartz feature as a function of their successional development. A pair of day and night airborne hyperspectral images were acquired using the Specim AisaOWL LWIR sensor (7.7–12 µm) and processed using an innovative algorithm to reduce the atmospheric interference in this spectral domain. The resulting day and night apparent emissivity products were used to produce a surface quartz content map of the study area. The significant reduction in atmospheric interference resulted in a high correlation (R2 = 0.88) between quartz content in field samples determined by X-ray powder diffraction analysis and emissivity estimations from the airborne images. This, in turn, served as the ground truth to our quartz content map of the surface, and by proxy to the BSC.

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