Monitoring terrestrial ecosystems: Ecological investigation of vegetation in the boreal birch forest of Dividalen National park, county Troms, Norway.

Updated 2000-11-02

In 1993, the Directorate for Nature Management (DN) established a new area for the monitoring of terrestrial ecosystems in Dividalen National Park in Troms County. This report presents the reanalysis of vegetation and soil from this terrestrial monitoring area. The area in Dividalen is located in the northern boreal birch forest, in a relatively continental section where the dominant type of vegetation is bilberry-mountain crowberry birch forest (A4c). The structure of the vegetation is analysed by multivariate methods (ordination). In Dividalen all together 131 species were found; 75 vascular plants, 18 mosses, 14 liverworts and 24 lichens. This is a decrease from the number of species recorded in 1993 when 141 species were found in the same mesoplots: 74 vascular plants, 24 mosses, 18 liverworts and 25 lichens. The decrease was not significant for the total number of species or for the total number of vascular plants. However the total number of cryptogames showed a slight significant decrease in number between 1993 and 1998. This may be due to increased cover of several ericoid species. In Dividalen we found no significant changes in vegetation composition for the periode 1993 – 1998 along the first four ordination axes. However, there were changes in mesoplots with high DCA1 values. The changes were in the direction towards lower species richness. Species like Myosotis decumbens, Poa alpina, Solidago virgaurea, Cerastium fontanum and Rumex acetosa ssp. lapponicus showed the largest decrease in these mesoplots. Species that showed the largest increase were Vaccinium vitis-idaea, Mnium spinosum and Polytrichum juniperinum. We have found no relations between these changes and acidification due to deposition of pollutans. Lack of disturbance factors in the area in the last years, which favours an increase in ericoid vegetation, is the probable explanation for the changes.

This is not a National Implementation Plan (NIP) project

Time frame

Status
Ongoing
Project time span
1989 -
Data collection
1990 -
Data processing
1991 -
Data reporting
1991 -

Contact information

Contact person
Vegar Bakkestuen
Address
Norwegian Institute for Nature Research Post Box 736, Sentrum N-0105 OSLO Norway
Phone
+47 23 35 51 23
Fax
+47 23 35 51 01
Email
on.ukinanin.lsoanin@neutsekkab.ragev
Other project contacts
Erik Framstad Norwegian Institute for Nature Research Post Box 736, Sentrum N-0105 OSLO Norway

Parameters and Media

Parameter groups measured/observed/modelled
Acidification parameters
Biological effects
Climate change effects
Heavy metals
Other metals/elements
Persistent organic pollutants (POPs)
Media sampled/studied/modelled
Higher plants
Lichens
Mosses
Soil/Humus

Geography

Regions studied
Norway

Data availability

Are data archived or planned to be archived at an AMAP Thematic Data Centre?
no
Samples/specimens archived in specimen banks?
No

Methods & Procedures

Procedures and methodology used for, e.g., sampling and sample storage, sample pretreatment, extraction and analysis, including which laboratories are involved, references to methods employed, etc.

The concept for vegetation investigation applied in TOV is harmonised with other vegetation monitoring programmes in Norway and Europe (e.g. Nordic Council of Ministers 2000).

Additional Information

Is this a bi- AND multi-lateral project (i.e. a project involving cooperation between different countries)?
No
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