The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area
The general migration model for Norway spruce (Picea abies) suggests that it arrived and established in Sweden along the Bothnian coast about 3500 years ago. Spruce thereafter spread westwards and southwards in Sweden, and it is suggested to have become established in the Scandes mountains about...
| Autor principal: | |
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| Formato: | Otro |
| Lenguaje: | sueco Inglés |
| Publicado: |
2004
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| Materias: | |
| Acceso en línea: | https://stud.epsilon.slu.se/10840/ |
| _version_ | 1855571760669261824 |
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| author | Ek, Lars-Göran |
| author_browse | Ek, Lars-Göran |
| author_facet | Ek, Lars-Göran |
| author_sort | Ek, Lars-Göran |
| collection | Epsilon Archive for Student Projects |
| description | The general migration model for Norway spruce (Picea abies) suggests that it arrived and
established in Sweden along the Bothnian coast about 3500 years ago. Spruce thereafter
spread westwards and southwards in Sweden, and it is suggested to have become established
in the Scandes mountains about 1300-1600 years ago. Recent macrofossil finds in the Scandes
mountains have challenged this theory. Two macrofossils of Norway spruce dated to 11 020
and 10 250 14C yr BP have been found on Mt Åreskutan that is a mountain top in the southwestern
Swedish Scandes.
The aim of this study was to find out if this early establishment of Norway spruce on Mt
Åreskutan could be verified with pollen analysis. Two mires where selected for the study on
two adjacent mountains, Årebjörnen and Totthummeln 6,5 km and 3,5 km distant from
Åreskutan. The pollen diagrams reveal that Norway spruce was established on these two
mountains about 4000 years cal. BP. This much later establishment of spruce on Årebjörnen
and Totthummeln compared to Mt Åreskutan show that the establishment of spruce in an area
can vary strongly in time plausibly due to differences in local climate and due to competition
from already established vegetation. The reason for the absence of spruce pollen from Mt
Åreskutan in the Årebjörnen and Totthummeln peat stratigraphies, can be that the population
on Åreskutan was to small and the distance between the two mountains and Åreskutan is to
long for spruce pollen to be dispersed. Still the establishment on the studied mountains
occurred ca 2500 years earlier than postulated by the former model. The stand of Ulmus that
can be found on the south side of Totthummeln today has most likely been established during
the post glacial temperature optima and is thus a relict that has survived for 7000 years. |
| format | Otro |
| id | RepoSLU10840 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish Inglés |
| publishDate | 2004 |
| publishDateSort | 2004 |
| record_format | eprints |
| spelling | RepoSLU108402017-09-25T10:02:09Z https://stud.epsilon.slu.se/10840/ The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area Ek, Lars-Göran Forestry - General aspects The general migration model for Norway spruce (Picea abies) suggests that it arrived and established in Sweden along the Bothnian coast about 3500 years ago. Spruce thereafter spread westwards and southwards in Sweden, and it is suggested to have become established in the Scandes mountains about 1300-1600 years ago. Recent macrofossil finds in the Scandes mountains have challenged this theory. Two macrofossils of Norway spruce dated to 11 020 and 10 250 14C yr BP have been found on Mt Åreskutan that is a mountain top in the southwestern Swedish Scandes. The aim of this study was to find out if this early establishment of Norway spruce on Mt Åreskutan could be verified with pollen analysis. Two mires where selected for the study on two adjacent mountains, Årebjörnen and Totthummeln 6,5 km and 3,5 km distant from Åreskutan. The pollen diagrams reveal that Norway spruce was established on these two mountains about 4000 years cal. BP. This much later establishment of spruce on Årebjörnen and Totthummeln compared to Mt Åreskutan show that the establishment of spruce in an area can vary strongly in time plausibly due to differences in local climate and due to competition from already established vegetation. The reason for the absence of spruce pollen from Mt Åreskutan in the Årebjörnen and Totthummeln peat stratigraphies, can be that the population on Åreskutan was to small and the distance between the two mountains and Åreskutan is to long for spruce pollen to be dispersed. Still the establishment on the studied mountains occurred ca 2500 years earlier than postulated by the former model. The stand of Ulmus that can be found on the south side of Totthummeln today has most likely been established during the post glacial temperature optima and is thus a relict that has survived for 7000 years. Enligt den gängse modellen för granens (Picea abies) invandring etablerades granen vid Bottniska kusten för ca 3500 år sedan. Därefter spred den sig västerut och söderut i Sverige. Etableringen i Skanderna skedde för mellan 1300-1500 år sedan. Makrofossilfynd av gran i fjällen har ifrågasatt detta.Två makrofossil av gran daterade till 11 020 14C år före nutid och 10 250 14C år före nutid hittades på Åreskutan, ett fjäll beläget i den sydvästra delen av fjällkedjan. Syftet med föreliggande studie var att undersöka om den tidiga kolonisationen av gran på Åreskutan kunde verifieras med pollenanalys. Två myrar på de två närmaste bergen, Årebjörnen och Totthummeln, valdes för studien. Årebjörnen är beläget ca 6,5 km sydväst om Åreskutan och Totthummeln är beläget ca 3,5 km söder om Åreskutan. Pollendiagrammen visade att gran blev etablerad på dessa berg för ca 4000 år sedan, avsevärt tidigare än den gängse modellen säger, men också betydligt senare än makrofossilen från Åreskutan. Detta visar att etableringen av gran inom en region kan variera i tid. Det kan i sin tur bero på klimatiska skillnader mellan de olika lokalerna och konkurrens från redan etablerad vegetation. Orsaken till att pollen saknas från granarna på Åreskutan i pollenanalyserna från Årebjörnen och Totthummeln tyder på att granarna på Åreskutan var för få, eller att avståndet mellan Åreskutan och Årebjörnen och Totthummeln var för stort för pollen att spridas dit. Beståndet av alm (Ulmus glabra) som idag finns på den södra sidan av Totthummeln har troligen blivit etablerad under den postglaciala värmeperioden och pollenanalysen stödjer att det är en relikt som har överlevt under ca 7000 år. 2004-07-21 Other NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/10840/1/ek_l_170925.pdf Ek, Lars-Göran, 2004. The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area : a follow-up of the macrofossil finds on Mount Åreskutan. UNSPECIFIED, Umeå. Umeå: (S) > Dept. of Forest Ecology and Management <https://stud.epsilon.slu.se/view/divisions/OID-241.html> urn:nbn:se:slu:epsilon-s-7124 eng |
| spellingShingle | Forestry - General aspects Ek, Lars-Göran The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area |
| title | The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area |
| title_full | The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area |
| title_fullStr | The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area |
| title_full_unstemmed | The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area |
| title_short | The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area |
| title_sort | establishment of norway spruce (picea abies (l.) karst.) on two mountains in the åre area |
| topic | Forestry - General aspects |
| url | https://stud.epsilon.slu.se/10840/ https://stud.epsilon.slu.se/10840/ |