Details
| Original language | English |
|---|---|
| Pages (from-to) | 369-377 |
| Number of pages | 9 |
| Journal | Journal of Hydrology and Hydromechanics |
| Volume | 69 |
| Issue number | 4 |
| Early online date | 15 Nov 2021 |
| Publication status | Published - 1 Dec 2021 |
Abstract
Biocrusts are biological communities that occupy the soil surface, accumulate organic matter and mineral particles and hence strongly affect the properties of the soils they cover. Moreover, by affecting water repellency, biocrusts may cause a preferential infiltration of rainwater, with a high impact on the formation of local water pathways, especially for sand dunes. The aim of this study is to shed light on the connections between water repellency and pH, carbonate and organic matter content in two dune ecosystems with different biocrust types. For this, we used contact angle measurements, gas volumetric carbonate determination and organic matter characterization via FT-IR and TOF-SIMS. In both ecosystems, moss-dominated biocrusts showed higher water repellency and higher amounts of organic matter compared to algal or cyanobacterial biocrusts. Surprisingly, the biocrusts of the two dune systems did not show differences in organic matter composition or organic coatings of the mineral grains. Biocrusts on the more acidic dunes showed a significantly higher level of water repellency as compared to higher carbonate containing dunes. We conclude that the driving factor for the increase in water repellency between cyanobacterial and moss-dominated biocrusts within one study site is the content of organic matter. However, when comparing the different study sites, we found that higher amounts of carbonate reduced biocrust water repellency.
Keywords
- Biocrust, Carbonate content, Organic matter composition, Surface characteristics, TOF-SIMS, Water repellency
ASJC Scopus subject areas
- Environmental Science(all)
- Water Science and Technology
- Engineering(all)
- Mechanical Engineering
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
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In: Journal of Hydrology and Hydromechanics, Vol. 69, No. 4, 01.12.2021, p. 369-377.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Water repellency decreases with increasing carbonate content and pH for different biocrust types on sand dunes
AU - Drahorad, Sylvie Laureen
AU - Felde, Vincent J.M.N.L.
AU - Ellerbrock, Ruth H.
AU - Henss, Anja
N1 - Funding Information: For partial funding, we thank the DFG (FE 218/14-1).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Biocrusts are biological communities that occupy the soil surface, accumulate organic matter and mineral particles and hence strongly affect the properties of the soils they cover. Moreover, by affecting water repellency, biocrusts may cause a preferential infiltration of rainwater, with a high impact on the formation of local water pathways, especially for sand dunes. The aim of this study is to shed light on the connections between water repellency and pH, carbonate and organic matter content in two dune ecosystems with different biocrust types. For this, we used contact angle measurements, gas volumetric carbonate determination and organic matter characterization via FT-IR and TOF-SIMS. In both ecosystems, moss-dominated biocrusts showed higher water repellency and higher amounts of organic matter compared to algal or cyanobacterial biocrusts. Surprisingly, the biocrusts of the two dune systems did not show differences in organic matter composition or organic coatings of the mineral grains. Biocrusts on the more acidic dunes showed a significantly higher level of water repellency as compared to higher carbonate containing dunes. We conclude that the driving factor for the increase in water repellency between cyanobacterial and moss-dominated biocrusts within one study site is the content of organic matter. However, when comparing the different study sites, we found that higher amounts of carbonate reduced biocrust water repellency.
AB - Biocrusts are biological communities that occupy the soil surface, accumulate organic matter and mineral particles and hence strongly affect the properties of the soils they cover. Moreover, by affecting water repellency, biocrusts may cause a preferential infiltration of rainwater, with a high impact on the formation of local water pathways, especially for sand dunes. The aim of this study is to shed light on the connections between water repellency and pH, carbonate and organic matter content in two dune ecosystems with different biocrust types. For this, we used contact angle measurements, gas volumetric carbonate determination and organic matter characterization via FT-IR and TOF-SIMS. In both ecosystems, moss-dominated biocrusts showed higher water repellency and higher amounts of organic matter compared to algal or cyanobacterial biocrusts. Surprisingly, the biocrusts of the two dune systems did not show differences in organic matter composition or organic coatings of the mineral grains. Biocrusts on the more acidic dunes showed a significantly higher level of water repellency as compared to higher carbonate containing dunes. We conclude that the driving factor for the increase in water repellency between cyanobacterial and moss-dominated biocrusts within one study site is the content of organic matter. However, when comparing the different study sites, we found that higher amounts of carbonate reduced biocrust water repellency.
KW - Biocrust
KW - Carbonate content
KW - Organic matter composition
KW - Surface characteristics
KW - TOF-SIMS
KW - Water repellency
UR - http://www.scopus.com/inward/record.url?scp=85120329816&partnerID=8YFLogxK
U2 - 10.2478/johh-2021-0022
DO - 10.2478/johh-2021-0022
M3 - Article
AN - SCOPUS:85120329816
VL - 69
SP - 369
EP - 377
JO - Journal of Hydrology and Hydromechanics
JF - Journal of Hydrology and Hydromechanics
SN - 0042-790X
IS - 4
ER -