Helen Karu "Development of ecosystems under human activity in the North-East Estonian industrial region: forests on post-mining sites and bogs" | University of Tartu

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Contacts of UT units

Faculty of Arts and Humanities
Faculty phone: 
+372 737 5341
Faculty address: 
Jakobi 2, rooms 116–121, 51005 Tartu
  • Dean's Office
    Faculty phone: 
    + 372 737 5341
    Faculty address: 
    Jakobi 2, rooms 116–121, 51005 Tartu
  • Institute of History and Archaeology
    Faculty phone: 
    +372 737 5651
    Faculty address: 
    Jakobi 2, 51005 Tartu
  • Institute of Estonian and General Linguistics
    Faculty phone: 
    +372 737 5221
    Faculty address: 
    Jakobi 2, 51005 Tartu
  • Institute of Philosophy and Semiotics
    Faculty phone: 
    +372 737 5314
    Faculty address: 
    Jakobi 2, rooms 309–352, 51005 Tartu
  • Institute of Cultural Research
    Faculty phone: 
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    Faculty address: 
    Ülikooli 16, 51003 Tartu
  • School of Theology and Religious Studies
    Faculty phone: 
    +372 737 5301
    Faculty address: 
    Ülikooli 18–310, 50090 Tartu
  • College of Foreign Languages and Cultures
    Faculty address: 
    Lossi 3, 51003 Tartu
  • Viljandi Culture Academy
    Faculty phone: 
    +372 435 5232
    Faculty address: 
    Posti 1, 71004 Viljandi
Faculty of Social Sciences
Faculty phone: 
+372 737 5957
Faculty address: 
Lossi 36, 51003 Tartu
  • Dean's Office
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    + 372 737 5900
    Faculty address: 
    Lossi 36, 51003 Tartu
  • Institute of Education
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    Faculty address: 
    Salme 1a–29, 50103 Tartu
  • Johan Skytte Institute of Political Studies
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    Faculty address: 
    Lossi 36–301, 51003 Tartu
  • School of Economics and Business Administration
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    Narva mnt 18, 51009 Tartu
  • Institute of Psychology
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  • Institute of Biomedicine and Translational Medicine
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  • Institute of Pharmacy
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  • Institute of Dentistry
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    Ravila 19, 50411 Tartu
  • Institute of Sport Sciences and Physiotherapy
    Faculty phone: 
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    Faculty address: 
    Jakobi 5–205, 51005 Tartu
Faculty of Science and Technology
Faculty phone: 
+372 737 5820
Faculty address: 
Vanemuise 46–208, 51014 Tartu
  • Dean's Office
    Faculty phone: 
    +372 737 5820
    Faculty address: 
    Vanemuise 46–208, 51005 Tartu
  • Institute of Computer Science
    Faculty phone: 
    +372 737 5445
    Faculty address: 
    Narva mnt 18, 51009 Tartu
  • Estonian Marine Institute
    Faculty phone: 
    +372 671 8902
    Faculty address: 
    Mäealuse 14, 12618 Tallinn
  • Institute of Physics
    Faculty address: 
    W. Ostwaldi 1, 50411 Tartu
  • Institute of Chemistry
    Faculty phone: 
    +372 737 5261
    Faculty address: 
    Ravila 14a, 50411 Tartu
  • Institute of Mathematics and Statistics
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    Faculty address: 
    Narva mnt 18, 51009 Tartu
  • Institute of Molecular and Cell Biology
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  • Tartu Observatory
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  • Institute of Technology
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    Nooruse 1, 50411 Tartu
  • Institute of Ecology and Earth Sciences
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    Faculty address: 
    Vanemuise 46, 51003 Tartu
Institutions
  • Library
    Faculty phone: 
    +372 737 5702
    Faculty address: 
    W. Struve 1, 50091 Tartu
  • Youth Academy
    Faculty phone: 
    +372 737 5581
    Faculty address: 
    Uppsala 10, 51003 Tartu
  • Institute of Genomics
    Faculty phone: 
    +372 737 4000
    Faculty address: 
    Riia 23b, 51010 Tartu
  • Museum
    Faculty phone: 
    +372 737 5674
    Faculty address: 
    Lossi 25, 51003 Tartu
  • University of Tartu Natural History Museum and Botanical Garden
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    +372 737 6076
    Faculty address: 
    Vanemuise 46, 51003 Tartu
Support Units
  • Administrative Office
    Faculty phone: 
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    Faculty address: 
    Ülikooli 18a, 51005 Tartu
  • Centre for Entrepreneurship and Innovation
    Faculty phone: 
    +372 737 6339
    Faculty address: 
    Lossi 3, III floor, 51003 Tartu
  • University Office in Tallinn
    Faculty phone: 
    +372 737 6600
    Faculty address: 
    Teatri väljak 3, 10143 Tallinn
  • Estates Office
    Faculty phone: 
    +372 737 5137
    Faculty address: 
    Ülikooli 18a, 51005 Tartu
  • Finance Office
    Faculty phone: 
    +372 737 5125
    Faculty address: 
    Jakobi 4, 51005 Tartu
  • Grant Office
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    +372 737 6215
    Faculty address: 
    Lossi 3, III floor, 51003 Tartu
  • Information Technology Office
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    Faculty address: 
    Ülikooli 18a, 51005 Tartu
  • Human Resources Office
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    Faculty address: 
    Ülikooli 18, rooms 302 and 304, 50090 Tartu
  • Internal Audit Office
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    Ülikooli 18-244, 51005 Tartu
  • Marketing and Communication Office
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    Faculty address: 
    Ülikooli 18, rooms 102, 104, 209, 210, 50090 Tartu
  • Office of Academic Affairs
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    +372 737 5620
    Faculty address: 
    Ülikooli 18, 50090 Tartu
  • Procurement Office
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    Faculty address: 
    Ülikooli 18a, 51005 Tartu
  • Rector's Strategy Office
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    +372 737 5600
    Faculty address: 
    Ülikooli 18, 50090 Tartu
  • Student Council
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    Ülikooli 18b, 51005 Tartu
  • University of Tartu Press
    Faculty phone: 
    +372 737 5945
    Faculty address: 
    W. Struve 1, 50091 Tartu
Other Units
  • University of Tartu Academic Sports Club
    Faculty phone: 
    +372 737 5371
    Faculty address: 
    Ujula 4, 51008 Tartu
  • Tartu Student Village
    Faculty phone: 
    +372 740 9959
    Faculty address: 
    Narva mnt 25, 51013 Tartu
  • Tartu Students’ Club
    Faculty phone: 
    +372 730 2400
    Faculty address: 
    Kalevi 24, 51010 Tartu
  • Tartu University Hospital
    Faculty address: 
    L. Puusepa 1a, 50406 Tartu
  • University of Tartu Foundation
    Faculty phone: 
    +372 737 5852
    Faculty address: 
    Ülikooli 18, 50090 Tartu
  • View all other units

Helen Karu "Development of ecosystems under human activity in the North-East Estonian industrial region: forests on post-mining sites and bogs"

Date: 
16.06.2015 - 14:15

Thesis supervisor:  Associate Professor Seni Arne Sellin and Seniro Research Fellow Margus Pensa, University of Tartu

Opponent: Carolina Martínez-Ruiz, PhD, University of Valladolid (Hispaania), Associate Professor

Summary

Oil shale mining has affected ~1% of the Estonian terrestrial area. Due to mining, natural landscapes in NE Estonia have been replaced by artificial landforms—mine spoils and waste piles. The first aim of this thesis was to describe the development of vegetation and soils in the Narva opencast mine and on Kohtla-Järve semicoke hills in different plantations and areas left to natural succession. According to the results of the thesis, plantations established in Narva mine can show remarkably good growth. Among ~30-year-old stands, alder and silver birch plantations are most productive. Natural stands develop slower, although at comparable rate to Scots pine plantations, which dominate the afforested area. Broadleaved species, especially alders, also seem to enhance soil development and herb layer productivity on both mine spoil and semicoke dumps. Species composition of herb layer differs significantly between site types on mine spoil and is most diverse in natural stands. Thus, vegetation and landscape in reclaimed opencasts could be diversified by planting different tree species and letting natural succession occur within plantations. 
 The second aim was to assess changes in bog ecosystems caused by alkaline air pollution from power plants and the lowering of the water table by forestry-drainage, peat mining and underground oil shale mining. Study was conducted in marginal areas of Kalina and Selisoo bogs. In both, but especially in Kalina, species composition has changed due to air pollution. In addition, both air pollution and drainage have contributed to the increase of tree growth and decrease of moss productivity. Lowering of the water table also leads to increased CO2 emissions from peat, originating from decomposition and root respiration. Our results suggest that average water table and/or stand volume, but not species composition, could serve as indicators of peat carbon fluxes for poorly-drained forested bogs although underlying relationships require further investigation.

Location: 
Lai 40, ruum 218
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