Articles | Volume 68, issue 2
https://doi.org/10.5194/egqsj-68-177-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/egqsj-68-177-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 Sep 2019
Research article |
| 04 Sep 2019
| 04 Sep 2019
Chemotaxonomic patterns of vegetation and soils along altitudinal transects of the Bale Mountains, Ethiopia, and implications for paleovegetation reconstructions – Part 1: stable isotopes and sugar biomarkers
Betelhem Mekonnen
CORRESPONDING AUTHOR
Institute of Agronomy and Natural Sciences, Soil Biogeochemistry,
Martin-Luther University, Halle-Wittenberg, Von-Seckendorff-Platz 3,
06120, Halle, Germany
Department of Urban Agriculture, Misrak Polytechnic College, P.O. Box
785, Addis Ababa, Ethiopia
Wolfgang Zech
Institute of Soil Science and Soil Geography, University of Bayreuth,
95440 Bayreuth, Universitätsstrasse 30, Germany
Bruno Glaser
Institute of Agronomy and Natural Sciences, Soil Biogeochemistry,
Martin-Luther University, Halle-Wittenberg, Von-Seckendorff-Platz 3,
06120, Halle, Germany
Bruk Lemma
Institute of Agronomy and Natural Sciences, Soil Biogeochemistry,
Martin-Luther University, Halle-Wittenberg, Von-Seckendorff-Platz 3,
06120, Halle, Germany
Forest and Rangeland Biodiversity Directorate, Ethiopian
Biodiversity Institute, P.O. Box 30726, Addis Ababa, Ethiopia
Tobias Bromm
Institute of Agronomy and Natural Sciences, Soil Biogeochemistry,
Martin-Luther University, Halle-Wittenberg, Von-Seckendorff-Platz 3,
06120, Halle, Germany
Sileshi Nemomissa
Department of Plant Biology and Biodiversity Management, Addis Ababa
University, P.O. Box 3434, Addis Ababa, Ethiopia
Tamrat Bekele
Department of Plant Biology and Biodiversity Management, Addis Ababa
University, P.O. Box 3434, Addis Ababa, Ethiopia
Michael Zech
Institute of Agronomy and Natural Sciences, Soil Biogeochemistry,
Martin-Luther University, Halle-Wittenberg, Von-Seckendorff-Platz 3,
06120, Halle, Germany
Institute of Geography, Technical University of Dresden,
Helmholtzstrasse 10, 01062, Dresden, Germany
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Chemotaxonomic identification of keystone plant species in the Bale Mountains are possible using lignin phenols. However, Erica could not be differentiated chemotaxonomically from all other investigated plants using n-alkanes. Unambiguous characteristic patterns of lignin phenols reflected in the plant samples were not sustained in the organic layers and mineral topsoils. This is due to degradation and organic matter inputs by roots. Therefore, the past extent of Erica is still speculative.
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Michael Zech, Marcel Lerch, Marcel Bliedtner, Tobias Bromm, Fabian Seemann, Sönke Szidat, Gary Salazar, Roland Zech, Bruno Glaser, Jean Nicolas Haas, Dieter Schäfer, and Clemens Geitner
E&G Quaternary Sci. J., 70, 171–186, https://doi.org/10.5194/egqsj-70-171-2021, https://doi.org/10.5194/egqsj-70-171-2021, 2021
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E&G Quaternary Sci. J., 69, 261–262, https://doi.org/10.5194/egqsj-69-261-2021, https://doi.org/10.5194/egqsj-69-261-2021, 2021
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Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-427, https://doi.org/10.5194/bg-2019-427, 2019
Manuscript not accepted for further review
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Chemotaxonomic identification of keystone plant species in the Bale Mountains are possible using lignin phenols. However, Erica could not be differentiated chemotaxonomically from all other investigated plants using n-alkanes. Unambiguous characteristic patterns of lignin phenols reflected in the plant samples were not sustained in the organic layers and mineral topsoils. This is due to degradation and organic matter inputs by roots. Therefore, the past extent of Erica is still speculative.
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Biogeosciences Discuss., https://doi.org/10.5194/bgd-11-7823-2014, https://doi.org/10.5194/bgd-11-7823-2014, 2014
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E&G Quaternary Sci. J., 71, 91–110, https://doi.org/10.5194/egqsj-71-91-2022, https://doi.org/10.5194/egqsj-71-91-2022, 2022
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Lilian Reiss, Christian Stüwe, Thomas Einwögerer, Marc Händel, Andreas Maier, Stefan Meng, Kerstin Pasda, Ulrich Simon, Bernd Zolitschka, and Christoph Mayr
E&G Quaternary Sci. J., 71, 23–43, https://doi.org/10.5194/egqsj-71-23-2022, https://doi.org/10.5194/egqsj-71-23-2022, 2022
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Christian Zeeden, Jehangeer Ahmad Mir, Mathias Vinnepand, Christian Laag, Christian Rolf, and Reyaz Ahmad Dar
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Christopher-Bastian Roettig
E&G Quaternary Sci. J., 69, 161–163, https://doi.org/10.5194/egqsj-69-161-2020, https://doi.org/10.5194/egqsj-69-161-2020, 2020
Joana Seguin, Pavlos Avramidis, Annette Haug, Torben Kessler, Arndt Schimmelmann, and Ingmar Unkel
E&G Quaternary Sci. J., 69, 165–186, https://doi.org/10.5194/egqsj-69-165-2020, https://doi.org/10.5194/egqsj-69-165-2020, 2020
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We present two new palaeolake archives of Pheneos and Kaisari, Peloponnese, and compare them with records from Stymphalia and Asea by applying the same set of analyses to all sites. We focus on different spatial scales to estimate the validity range of the proxy signals. Geochemical ratios depict hydrological variation and environmental changes over the last 5000 years. They indicate drier phases, but timing and duration vary, which may be explained by site-specific ecosystem responses.
Wolfgang Knierzinger, Ruth Drescher-Schneider, Klaus-Holger Knorr, Simon Drollinger, Andreas Limbeck, Lukas Brunnbauer, Felix Horak, Daniela Festi, and Michael Wagreich
E&G Quaternary Sci. J., 69, 121–137, https://doi.org/10.5194/egqsj-69-121-2020, https://doi.org/10.5194/egqsj-69-121-2020, 2020
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We present multi-proxy analyses of a 14C-dated peat core covering the past ⁓5000 years from the ombrotrophic Pürgschachen Moor. Pronounced increases in cultural indicators suggest significant human activity in the Bronze Age and in the period of the late La Tène culture. We found strong, climate-controlled interrelations between the pollen record, the humification degree and the ash content. Human activity is reflected in the pollen record and by heavy metals.
Lutz Schirrmeister, Elisabeth Dietze, Heidrun Matthes, Guido Grosse, Jens Strauss, Sebastian Laboor, Mathias Ulrich, Frank Kienast, and Sebastian Wetterich
E&G Quaternary Sci. J., 69, 33–53, https://doi.org/10.5194/egqsj-69-33-2020, https://doi.org/10.5194/egqsj-69-33-2020, 2020
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Late Pleistocene Yedoma deposits of Siberia and Alaska are prone to degradation with warming temperatures.
Multimodal grain-size distributions of >700 samples indicate varieties of sediment production, transport, and deposition.
These processes were disentangled using robust endmember modeling analysis.
Nine robust grain-size endmembers characterize these deposits.
The data set was finally classified using cluster analysis.
The polygenetic Yedoma origin is proved.
Michael O'Connell, Karen Molloy, and Eneda Jennings
E&G Quaternary Sci. J., 69, 1–32, https://doi.org/10.5194/egqsj-69-1-2020, https://doi.org/10.5194/egqsj-69-1-2020, 2020
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Long-term environmental change in Co. Mayo, on the mid-Atlantic seaboard of Ireland, is discussed. Pollen diagrams and bog pine, dated by 14C and dendrochronology, provide evidence for woodlands, farming and climate change. Intensive farming is dated to the early Neolithic (3800–3400 BC) prior to wide-scale spread of blanket bog. Construction of the peat-covered, stone-wall field system at Céide Fields occurred at this time which is unexpectedly early. Bronze and Iron Age activity is detailed.
Bruk Lemma, Betelhem Mekonnen, Bruno Glaser, Wolfgang Zech, Sileshi Nemomissa, Tamrat Bekele, Lucas Bittner, and Michael Zech
E&G Quaternary Sci. J., 68, 189–200, https://doi.org/10.5194/egqsj-68-189-2019, https://doi.org/10.5194/egqsj-68-189-2019, 2019
Short summary
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Chemotaxonomic identification of keystone plant species in the Bale Mountains are possible using lignin phenols. However, Erica could not be differentiated chemotaxonomically from all other investigated plants using n-alkanes. Unambiguous characteristic patterns of lignin phenols reflected in the plant samples were not sustained in the organic layers and mineral topsoils. This is due to degradation and organic matter inputs by roots. Therefore, the past extent of Erica is still speculative.
Hannes Laermanns, Simon Matthias May, Daniel Kelterbaum, Giorgi Kirkitadze, Stephan Opitz, Levan Navrozashvili, Mikheil Elashvili, and Helmut Brückner
E&G Quaternary Sci. J., 68, 119–139, https://doi.org/10.5194/egqsj-68-119-2019, https://doi.org/10.5194/egqsj-68-119-2019, 2019
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The landscape on the Black Sea coast of Georgia has changed significantly during the last few millennia. By using granulometric and geochemical analyses, we reconstructed significant sea level, coastline and palaeoenvironmental changes that have taken place in the surroundings of the Supsa fan since at least 4000 BCE.
Elisabeth Dietze and Michael Dietze
E&G Quaternary Sci. J., 68, 29–46, https://doi.org/10.5194/egqsj-68-29-2019, https://doi.org/10.5194/egqsj-68-29-2019, 2019
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Sedimentary deposits provide insights into past Earth surface dynamics via the size distribution of mineral grains documenting the erosion, transport and deposition history. This study introduces structured procedures to decipher the distinct grain-size distributions of sediment samples that were mixed during/after deposition, using the free statistical tool EMMAgeo. Compared with other algorithms, EMMAgeo is unique as it provides uncertainty estimates and allows expert knowledge to be included.
Clemens von Scheffer, Annika Lange, François De Vleeschouwer, Joachim Schrautzer, and Ingmar Unkel
E&G Quaternary Sci. J., 68, 13–28, https://doi.org/10.5194/egqsj-68-13-2019, https://doi.org/10.5194/egqsj-68-13-2019, 2019
Short summary
Short summary
By using geochemical and pollen data, this study wanted to close knowledge gaps on the interconnection of climate, environment and human impact in the Kleinwalser Valley (Kleinwalsertal, northern central Alps) over the past 6200 years. For a long time, the Walser people were believed to be the first settlers, who cultivated the valley. However, humans have recurrently used and modified the landscape for at least 5500 years by burning or cutting down forests and practicing pasture management.
Cited articles
Abbate, E., Bruni, P., and Sagri, M.: Geology of Ethiopia: A Review and
Geomorphological Perspectives, in: Landscapes and Landforms of Ethiopia,
edited by: Billi, P., Springer Netherlands, Dordrecht, 33–64, 2015.
Amelung, W., Cheshire, M. V., and Guggenberger, G.: Determination of neutral
and acidic sugars in soil by capillary gas liquid chromatography after
trifluoroacetic acid hydrolysis, Soil Biol. Biochem., 28, 1631–1639,
https://doi.org/10.1016/S0038-0717(96)00248-9, 1996.
Belayneh, A., Yohannes, T., and Worku, A.: Recurrent and extensive forest
fire incidence in the Bale Mountains National Park (BMNP), Ethiopia: Extent,
Cause and Consequences, Int. J. Environ. Sci., 2, 29–39, 2013.
Billi, P.: Geomorphological Landscapes of Ethiopia, in Landscapes and
Landforms of Ethiopia, edited by: Billi, P., 3–32, Springer Netherlands,
Dordrecht, 2015.
Bonnefille, R.: Evidence for a Cooler and Drier Climate in Ethiopia 2.5 Mys,
Nature, 303, 487–491, 1983.
Bonnefille, R. and Hamilton, C.: Quaternary and Late Tertiary history of
Ethiopian vegetation, Acta Uni. Upps. Symb. Bot. Upps. 26, 48–63, 1986.
Brewer, S., Guiot, J., and Barboni, D.: Use of Pollen as Climate Proxies,
Encycl. Quat. Sci. Second Ed., 805–815,
https://doi.org/10.1016/B978-0-444-53643-3.00180-1, 2013.
Dawson, T. E., Mambelli, S., Plamboeck, A. H., Templer, P. H., and Tu, K. P.:
Stable Isotopes in Plant Ecology, Annu. Rev. Ecol. Syst., 33, 507–559,
https://doi.org/10.1146/annurev.ecolsys.33.020602.095451, 2002.
Ehleringer, J. R., Buchmann, N., and Flanagan, L. B.: Carbon isotope ratios
in belowground carbon cycle processes, Ecol. Appl., 10, 412–422, 2000.
Eshetu, Z. and Högberg, P.: Reconstruction of Forest Site History in
Ethiopian Highlands Based on 13C Natural Abundance of Soils, AMBIO A J.
Hum. Environ., 29, 83–89, https://doi.org/10.1579/0044-7447-29.2.83, 2000.
Farquhar, G., O'Leary, and Berry, J.: On the relationship between carbon
isotope discrimination and the intercellular carbon dioxide concentration in
leaves, Aust. J. Plant Physiol., 9, 121–137, 1982.
Friedli, H., Lötscher, H., Oeschger, H., Siegenthaler, U., and Stauffer,
B.: Ice core record of the 13C ∕ 12C ratio of atmospheric CO2 in the past
two centuries, Nature, 324, 237–238, https://doi.org/10.1038/324237a0, 1986.
Friis, I.: Zonation of Forest Vegetation on the South Slope of Bale
Mountains, South Ethiopia, Ethiop. J. Sci., 9, 29–44, 1986.
Friis, I., Sebsebe, D., and Breugel, P. V.: Atlas of the Potential
Vegetation of Ethiopia, The Royal Danish Academy of Sciences and
Letters, Addis Ababa University Press and Shama Books, Addis Ababa,
Ethiopia, 307 pp., 2010.
Garten, C. T., Cooper, L. W., Post, W. M., and Hanson, P. J.: Climate Controls
on Forest Soil C Isotope Ratios in the Southern Appalachian Mountains,
Ecology, 81, 1108–1119, 2000.
Gebru, T., Eshetu, Z., Huang, Y., Woldemariam, T., Strong, N., Umer, M.,
DiBlasi, M., and Terwilliger, V. J.: Holocene palaeovegetation of the Tigray
Plateau in northern Ethiopia from charcoal and stable organic carbon
isotopic analyses of gully sediments, Palaeogeogr. Palaeocl., 282, 67–80, https://doi.org/10.1016/j.palaeo.2009.08.011, 2009.
Glaser, B. and Zech, W.: Reconstruction of climate and landscape changes in
a high mountain lake catchment in the Gorkha Himal, Nepal during the Late
Glacial and Holocene as deduced from radiocarbon and compound-specific
stable isotope analysis of terrestrial, aquatic and microbial biomarkers,
Org. Geochem., 36, 1086–1098, https://doi.org/10.1016/j.orggeochem.2005.01.015, 2005.
Gunina, A. and Kuzyakov, Y.: Soil Biology & Biochemistry Sugars in soil
and sweets for microorganisms: Review of origin, content, composition and
fate, Soil Biol. Biochem., 90, 87–100, 2015.
Hamilton, A. C.: Environmental history of East Africa, A study of the
Quarternary, London, Academic Press, https://doi.org/10.2307/2259986, 328 pp., 1982.
Hedberg, O.: Vegetation belts of the east african mountains, Svenska
botaniska fôreningens, Stockholm, 1951.
Hedberg, O.: Evolution and speciation in a tropical high mountain flora,
Biol. J. Linn. Soc., 1, 135–148,
https://doi.org/10.1111/j.1095-8312.1969.tb01816.x, 1969.
Hepp, J., Rabus, M., Anhäuser, T., Bromm, T., Laforsch, C., Sirocko, F.,
Glaser, B., and Zech, M.: A sugar biomarker proxy for assessing terrestrial
versus aquatic sedimentary input, Org. Geochem., 98, 98–104,
https://doi.org/10.1016/j.orggeochem.2016.05.012, 2016.
Hevly, R. H.: Pollen production, transport and preservation?, Potentials
and limitations in archaeological palynology, 39–54, 1981.
Hillman, J. C.: Conservation in Bale Mountains National Park, Ethiopia,
Oryx, 20, 89–94, https://doi.org/10.1017/S0030605300026314, 1986.
Jacob, M., Annys, S., Frankl, A., De Ridder, M., Beeckman, H., Guyassa, E.
and Nyssen, J.: Tree line dynamics in the tropical African highlands –
identifying drivers and dynamics, J. Veg. Sci., 26, 9–20,
https://doi.org/10.1111/jvs.12215, 2015.
Jansen, B., Nierop, K. G. J., Kotte, M. C., de Voogt, P., and Verstraten, J.
M.: The applicability of accelerated solvent extraction (ASE) to extract
lipid biomarkers from soils, Appl. Geochem., 21, 1006–1015,
https://doi.org/10.1016/j.apgeochem.2006.02.021, 2006a.
Jansen, B., Nierop, K. G. J., Hageman, J. A., Cleef, A. M., and Verstraten,
J. M.: The straight-chain lipid biomarker composition of plant species
responsible for the dominant biomass production along two altitudinal
transects in the Ecuadorian Andes, Org. Geochem., 37, 1514–1536,
https://doi.org/10.1016/j.orggeochem.2006.06.018, 2006b.
Jansen, B., Haussmann, N. S., Tonneijck, F. H., Verstraten, J. M., and de
Voogt, P.: Characteristic straight-chain lipid ratios as a quick method to
assess past forest-páramo transitions in the Ecuadorian Andes,
Palaeogeogr. Palaeocl., 262, 129–139,
https://doi.org/10.1016/j.palaeo.2008.02.007, 2008.
Jia, G., Dungait, J. A. J., Bingham, E. M., Valiranta, M., Korhola, A., and
Evershed, R. P.: Neutral monosaccharides as biomarker proxies for
bog-forming plants for application to palaeovegetation reconstruction in
ombrotrophic peat deposits, Org. Geochem., 39, 1790–1799,
https://doi.org/10.1016/j.orggeochem, 2008.
Johansson, M.: Fire and grazing in subalpine heathlands and forests of Bale
Mountains, Ethiopia, Institutionen för skogens ekologi och skötsel,
Sveriges lantbruksuniversitet, Umeå, 14, 1652–1668, 2013.
Kebede, M., Ehrich, D., Taberlet, P., Nemomissa, S., and Brochmann, C.:
Phylogeography and conservation genetics of a giant lobelia (Lobelia
giberroa) in Ethiopian and Tropical East African mountains, Mol. Ecol.,
16, 1233–1243, https://doi.org/10.1111/j.1365-294X.2007.03232.x, 2007.
Kidane, Y., Stahlmann, R., and Beierkuhnlein, C.: Vegetation dynamics, and
land use and land cover change in the Bale Mountains, Ethiopia, Environ.
Monit. Assess., 184, 7473–7489, https://doi.org/10.1007/s10661-011-2514-8, 2012.
Körner, C., Farquhar, G. D., and Wong, S. C.: Carbon isotope
discrimination by plants follows latitudinal and altitudinal trends,
Oecologia, 88, 30–40, https://doi.org/10.1007/BF00328400, 1991.
Krepkowski, J., Gebrekirstos, A., Shibistova, O., and Br, A.: Stable carbon
isotope labeling reveals different carry-over effects between functional
types of tropical trees in an Ethiopian mountain forest, New Phytol., 199,
431–440, 2013.
Lemma, B., Mekonnen, B., Glaser, B., Zech, W., Nemomissa, S., Bekele, T., Bittner, L., and Zech,
M.: Chemotaxonomic patterns of vegetation and soils along altitudinal transects of the Bale Mountains, Ethiopia, and implications for paleovegetation reconstructions – Part II: lignin-derived phenols and leaf-wax-derived n-alkanes, E&G Quaternary Sci. J., 69, 189–200, https://doi.org/10.5194/egqsj-69-189-2019, 2019a.
Lemma, B., Kebede, S., Nemomissa, S., Otte, I., Glaser, B., and Zech, M.: Spatial
and temporal 2H and18O isotope variation of contemporary
precipitation in the Bale Mountains, Ethiopia, Isotopes in Environmental and
Health Studies, submitted, 2019b.
Levin, N. E., Brown, F. H., Behrensmeyer, A. K., Bobe, R., and Cerling, T.
E.: Paleosol carbonates from the omo group: Isotopic records of local and
regional environmental change in East Africa, Palaeogeogr. Palaeocl., 307, 75–89, https://doi.org/10.1016/j.palaeo.2011.04.026, 2011.
Li, Y. C., Hai, Q., Corresp, X., Yang, X. L., Chen, H., Lu, X. M., Li, Y.,
Xu, Q., Yang, X., Chen, H. U. I., and Lu, X.: Pollen – vegetation
relationship and pollen preservation on the Northeastern Qinghai – Tibetan
Plateau, Grana, 44, 160–171, https://doi.org/10.1080/00173130500230608, 2005.
Lisanework, N. and Mesfin, T.: An ecological study of the vegetation of the
Harenna forest, Bale, Ethiopia. Ethiop. J. Sci. 12, 63–93, 1989.
Liu, X. H., Zhao, L. J., Gasaw, M., Gao, D. Y., Qin, D. H., and Ren, J. W.:
Foliar δ13C and δ15N values of C3 plants in the Ethiopia Rift
Valley and their environmental controls, Chinese Sci. Bull., 52,
1265–1273, https://doi.org/10.1007/s11434-007-0165-5, 2007.
Miehe, S. and Miehe, G.: Ericaceous forest and heath land in Bale Mountains
of South Ethiopia, Ecology and Man's Impact, Hamburg, Stiftung Walderhaltung
in Africa Hamburg, Germany, 1994.
Messerli, B. and and Winiger, M.: Climate, Environmental Change, and
Resources of the African Mountains from the Mediterranean to the Equator,
Mt. Res. Dev., 12, 315–336,
https://doi.org/10.2307/3673683, 1992.
Meyers, P. A.: Preservation of elemental and isotopic source identification
of sedimentary organic matter, Chem. Geol., 114, 289–302,
https://doi.org/10.1016/0009-2541(94)90059-0, 1994.
Natelhoffer, K. J. and Fry, B.: Controls on Natural Nitrogen-15 and
Carbon-13 Abundances in Forest Soil Organic Matter, Soil Sci. Soc. Am. J.,
52, 1633–1640, https://doi.org/10.2136/sssaj1988.03615995005200060024x, 1988.
Oades, J. M.: Soil organic matter and structural stability: mechanisms and
implications for management, Plant Soil, 76, 319–337,
https://doi.org/10.1007/BF02205590, 1984.
Prietzel, J., Dechamps, N., and Spielvogel, S.: Analysis of non-cellulosic
polysaccharides helps to reveal the history of thick organic surface layers
on calcareous Alpine soils, Plant Soil, 365, 93–114,
https://doi.org/10.1007/s11104-012-1340-2, 2013.
Sauheitl, L., Glaser, B., and Bol, R.: Short-term dynamics of slurry-derived
plant and microbial sugars in a temperate grassland soil as assessed by
compound-specific δ13C analyses, Rapid Commun. Mass Spec.,
19, 1437–1446, https://doi.org/10.1002/rcm.1965, 2005.
Simoneit, B.: Molecular Indicators (Biomarkers) of past life, The Anatomical
Record, 286, 186–195, https://doi.org/10.1002/ar.10153, 2002.
Solomon, D., Fritzsche, F., Lehmann, J., Tekalign, M., and Zech, W.: Soil
organic matter dynamics in the sub-humid agro-ecosystems of the Ethiopian
highlands: Evidence from natural C13 abundance and particle-size
fractionation, Soil Sci. Soc. Am. J., 66, 969–978, 2002.
Street-Perrott, F. A., Ficken, K. J., Huang, Y., and Eglinton, G.: Late
Quaternary changes in carbon cycling on Mt. Kenya, East Africa: An overview
of the δ13C record in lacustrine organic matter, Quat. Sci.
Rev., 23, 861–879, https://doi.org/10.1016/j.quascirev.2003.06.007, 2004.
Tiercelin, J. J., Gibert, E., Umer, M., Bonnefille, R., Disnar, J. R.,
Lézine, A. M., Hureau-Mazaudier, D., Travi, Y., Keravis, D., and Lamb, H.
F.: High-resolution sedimentary record of the last deglaciation from a
high-altitude lake in Ethiopia, Quat. Sci. Rev., 27, 449–467,
https://doi.org/10.1016/j.quascirev.2007.11.002, 2008.
Tiunov, A. V.: Stable isotopes of carbon and nitrogen in soil ecological
studies, Biol. Bull., 34, 395–407, https://doi.org/10.1134/S1062359007040127, 2007.
Umer, M., Lamb, H. F., Bonnefille, R., Lézine, A. M., Tiercelin, J. J.,
Gibert, E., Cazet, J. P., and Watrin, J.: Late Pleistocene and Holocene
vegetation history of the Bale Mountains, Ethiopia, Quat. Sci. Rev.,
26, 2229–2246, https://doi.org/10.1016/j.quascirev.2007.05.004, 2007.
Wesche, K., Miehe, G., and Kaeppeli, M.: The Significance of Fire for
Afroalpine Ericaceous Vegetation, Mt. Res. Dev., 20, 340–347,
https://doi.org/10.1659/0276-4741(2000)020[0340:TSOFFA]2.0.CO;2, 2000.
Yimer, F., Ledin, S., and Abdelkadir, A.: Soil property variations in
relation to topographic aspect and vegetation community in the south-eastern
highlands of Ethiopia, For. Ecol. Manage., 232, 90–99,
https://doi.org/10.1016/j.foreco.2006.05.055, 2006.
Yineger, H., Kelbessa, E., Bekele, T., and Lulekal, E.: Floristic Composition
and Structure of the Dry Afromontane Forest At Bale Mountains National Park,
Ethiopia, J. Sci., 31, 103–120, https://doi.org/10.4314/sinet.v31i2.66551, 2008.
Young, H. J. and Young, T. P.: Local distribution of C3 and C4 grasses in
sites of overlap on Mount Kenya, Oecologia, 58, 373–377,
https://doi.org/10.1007/BF00385238, 1983.
Zech, M.: Evidence for Late Pleistocene climate changes from buried soils on
the southern slopes of Mt. Kilimanjaro, Tanzania, Palaeogeogr.
Palaeocl., 242, 303–312,
https://doi.org/10.1016/j.palaeo.2006.06.008., 2006.
Zech, M. and Glaser, B.: Compound-specific δ18O analyses of
neutral sugars in soils using gas chromatography-pyrolysis-isotope ratio
mass spectrometry: Problems, possible solutions and a first application,
Rapid Commun. Mass Spec., 23, 3522–3532, https://doi.org/10.1002/rcm.4278,
2009.
Zech, M., Zech, R., and Glaser, B.: A 240,000-year stable carbon and nitrogen
isotope record from a loess-like palaeosol sequence in the Tumara Valley,
Northeast Siberia, Chem. Geol., 242, 307–318,
https://doi.org/10.1016/j.chemgeo.2007.04.002, 2007.
Zech, M., Bimüller, C., Hemp, A., Samimi, C., Broesike, C., Hörold,
C., and Zech, W.: Human and climate impact on 15N natural abundance of
plants and soils in high-mountain ecosystems: A short review and two
examples from the Eastern Pamirs and Mt. Kilimanjaro, Isotopes Environ.
Health Stud., 47, 286–296, https://doi.org/10.1080/10256016.2011.596277, 2011a.
Zech, M., Leiber, K., Zech, W., Poetsch, T., and Hemp, A.: Late Quaternary
soil genesis and vegetation history on the northern slopes of Mt.
Kilimanjaro, East Africa, Quat. Int., 243, 327–336,
https://doi.org/10.1016/j.quaint.2011.05.020, 2011b.
Zech, M., Rass, S., Buggle, B., Löscher, M., and Zöller, L.:
Reconstruction of the late Quaternary paleoenvironments of the Nussloch
loess paleosol sequence, Germany, using n-alkane biomarkers, Quat. Res., 78,
326–335, https://doi.org/10.1016/j.yqres.2012.05.006, 2012.
Short summary
The study evaluates the ability of stable isotopes (δ13C and δ15N) and sugar biomarkers to distinguish Erica from the dominant vegetation of the Bale Mountains in order to reconstruct the past extent of Erica on the Sanetti Plateau. No significant differences in stable isotopes are found between the dominant plant species. Although Erica is characterized by quite high (G+M)/(A+X) ratios, it cannot be unambiguously distinguished from other plants due to degradation and soil microbial effects.
The study evaluates the ability of stable isotopes (δ13C and δ15N) and sugar biomarkers to...
