A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland
Following a period of land degradation lasting more than one thousand years, Iceland has undertaken ambitious restoration and afforestation efforts for one century now. Afforestation has also been a central venture of the Icelandic government in order to meet the commitments assigned by the Kyoto Pr...
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ftskemman:oai:skemman.is:1946/7560 2023-05-15T16:48:18+02:00 A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland Matthias Hunziker Landbúnaðarháskóli Íslands 2011-01 application/pdf http://hdl.handle.net/1946/7560 en eng http://hdl.handle.net/1946/7560 Ísland Birkiskógar Lífmassi Jarðvegur Thesis Master's 2011 ftskemman 2022-12-11T06:52:04Z Following a period of land degradation lasting more than one thousand years, Iceland has undertaken ambitious restoration and afforestation efforts for one century now. Afforestation has also been a central venture of the Icelandic government in order to meet the commitments assigned by the Kyoto Protocol, because vegetation represents an important carbon sink. The aims of the study are how above- and belowground woody biomass and organic carbon is accumulated along a chronosequence in South Iceland and how afforested and remnant mountain birch areas react as carbon sinks. In summer 2009, 31 monocormic trees (0.1-5.5 m height) were measured and excavated. The excavated trees formed the dataset to establish allometric biomass functions of Icelandic mountain birch. The functions were statistically fitted by using numerical nonlinear regression in Matlab. Tree inventories (n=519) were made at four study sites, whereof three were planted stands and one represented a natural grown woodland. Subsequently, forest biomass and carbon stock and sequestration rates of the four different old sites were estimated by the allometric relationships. The total biomass and carbon stock estimations were in the 10-year old birch stand 3.9 Mg DM ha-1 and 2.0 Mg C ha-1, in the 15-year old 21.1 Mg DM ha-1 and 11.1 Mg C ha-1, in the 60-year old 166.5 Mg DM ha-1 and 87.4 Mg C ha-1 and in the old-growth woodland 73.6 Mg DM ha-1 and 38.7 Mg C ha-1, respectively. Between 2004 and 2009 the average annual sequestration rates were 0.8 Mg DM ha-1 and 0.4 Mg C ha-1 (10-years old stand), 3.3 Mg DM ha-1 and 1.8 Mg C ha-1 (15-years old stand), 1.9 Mg DM ha-1 and 1.0 Mg C ha-1 (60-years old stand) and 2.0 Mg DM ha-1 and 1.1 Mg C ha-1 (old-growth), respectively. The ratio between long-time aboveground and belowground organic carbon stock increased along the chronosequence from 2:1 to 3:1. The root systems of mountain birch were stored in a thinner soil layer than expected. The results were well comparable with published studies on Icelandic mountain ... Thesis Iceland Skemman (Iceland) |
institution |
Open Polar |
collection |
Skemman (Iceland) |
op_collection_id |
ftskemman |
language |
English |
topic |
Ísland Birkiskógar Lífmassi Jarðvegur |
spellingShingle |
Ísland Birkiskógar Lífmassi Jarðvegur Matthias Hunziker A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland |
topic_facet |
Ísland Birkiskógar Lífmassi Jarðvegur |
description |
Following a period of land degradation lasting more than one thousand years, Iceland has undertaken ambitious restoration and afforestation efforts for one century now. Afforestation has also been a central venture of the Icelandic government in order to meet the commitments assigned by the Kyoto Protocol, because vegetation represents an important carbon sink. The aims of the study are how above- and belowground woody biomass and organic carbon is accumulated along a chronosequence in South Iceland and how afforested and remnant mountain birch areas react as carbon sinks. In summer 2009, 31 monocormic trees (0.1-5.5 m height) were measured and excavated. The excavated trees formed the dataset to establish allometric biomass functions of Icelandic mountain birch. The functions were statistically fitted by using numerical nonlinear regression in Matlab. Tree inventories (n=519) were made at four study sites, whereof three were planted stands and one represented a natural grown woodland. Subsequently, forest biomass and carbon stock and sequestration rates of the four different old sites were estimated by the allometric relationships. The total biomass and carbon stock estimations were in the 10-year old birch stand 3.9 Mg DM ha-1 and 2.0 Mg C ha-1, in the 15-year old 21.1 Mg DM ha-1 and 11.1 Mg C ha-1, in the 60-year old 166.5 Mg DM ha-1 and 87.4 Mg C ha-1 and in the old-growth woodland 73.6 Mg DM ha-1 and 38.7 Mg C ha-1, respectively. Between 2004 and 2009 the average annual sequestration rates were 0.8 Mg DM ha-1 and 0.4 Mg C ha-1 (10-years old stand), 3.3 Mg DM ha-1 and 1.8 Mg C ha-1 (15-years old stand), 1.9 Mg DM ha-1 and 1.0 Mg C ha-1 (60-years old stand) and 2.0 Mg DM ha-1 and 1.1 Mg C ha-1 (old-growth), respectively. The ratio between long-time aboveground and belowground organic carbon stock increased along the chronosequence from 2:1 to 3:1. The root systems of mountain birch were stored in a thinner soil layer than expected. The results were well comparable with published studies on Icelandic mountain ... |
author2 |
Landbúnaðarháskóli Íslands |
format |
Thesis |
author |
Matthias Hunziker |
author_facet |
Matthias Hunziker |
author_sort |
Matthias Hunziker |
title |
A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland |
title_short |
A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland |
title_full |
A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland |
title_fullStr |
A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland |
title_full_unstemmed |
A study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (Betula pubescens Ehrh.) along a chronosequence in southern Iceland |
title_sort |
study on above- and belowground biomass and carbon stocks as well as sequestration of mountain birch (betula pubescens ehrh.) along a chronosequence in southern iceland |
publishDate |
2011 |
url |
http://hdl.handle.net/1946/7560 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://hdl.handle.net/1946/7560 |
_version_ |
1766038412887851008 |