Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia
Forest structural and compositional diversity is of great importance for forest biodiversity, functioning, and response to disturbances. The purpose of this research was to examine how human impact has affected the structural-compositional diversity of mature pine-dominated boreal forest in boreal F...
Main Author: | |
---|---|
Other Authors: | , , |
Format: | Master Thesis |
Language: | English |
Published: |
Helsingin yliopisto
2019
|
Subjects: | |
Online Access: | http://hdl.handle.net/10138/299929 |
id |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/299929 |
---|---|
record_format |
openpolar |
spelling |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/299929 2023-08-20T04:06:25+02:00 Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia de Quesada, Gonzalo Helsingin yliopisto, Maatalous-metsätieteellinen tiedekunta, Metsätieteiden laitos University of Helsinki, Faculty of Agriculture and Forestry, Department of Forest Sciences Helsingfors universitet, Agrikultur- och forstvetenskapliga fakulteten, Institutionen för skogsvetenskaper 2019 http://hdl.handle.net/10138/299929 eng eng Helsingin yliopisto University of Helsinki Helsingfors universitet URN:NBN:fi:hulib-201903051434 http://hdl.handle.net/10138/299929 Diametric-species Diversity Boreal forest Human impact Forest structure Forest composition Metsien ekologia ja käyttö Forest Ecology and Management skoglig ekologi och resurshushållning pro gradu -tutkielmat master's thesis pro gradu-avhandlingar 2019 ftunivhelsihelda 2023-07-28T06:16:40Z Forest structural and compositional diversity is of great importance for forest biodiversity, functioning, and response to disturbances. The purpose of this research was to examine how human impact has affected the structural-compositional diversity of mature pine-dominated boreal forest in boreal Fennoscandia. For this a new approach was used, based on the classification of tree sizes by the diameter at breast height (dbh) and tree species, resulting in a new variable, the diametric-species, the variation of which describes the structural-compositional diversity of the forest. This variable was used to compare the structural-compositional diversity among three forest classes with different degree of human influence (near-natural, selectively logged and managed forest), using rarefaction as the main tool of analysis, complemented by analyses based on common diversity indices. For comparison, the rarefaction analysis was also done for the tree species classification. The results of the rarefaction analysis of the diametric-species showed that the near-natural forest was the most diverse and the managed forest the least diverse. The analysis solely on tree species showed no significant differences among the forest classes of different human impact. The Shannon diversity index showed no significant difference between the forest classes for the diametric-species and only tree species classifications, but the Simpson index found a slight difference between the selectively logged and managed forest classes for the diametric-species classification. Furthermore, the Sorensen index detected a difference among forest classes for diametric-species and failed to detect one for the tree species classification, which supports the rarefaction findings. We conclude that forest management has had a negative impact on forest compositional and structural diversity in mature Scots pine forests. The analysis also shows that the diametric-species classification can be a useful tool for forest diversity analysis and comparison Master Thesis Fennoscandia Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Diametric-species Diversity Boreal forest Human impact Forest structure Forest composition Metsien ekologia ja käyttö Forest Ecology and Management skoglig ekologi och resurshushållning |
spellingShingle |
Diametric-species Diversity Boreal forest Human impact Forest structure Forest composition Metsien ekologia ja käyttö Forest Ecology and Management skoglig ekologi och resurshushållning de Quesada, Gonzalo Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia |
topic_facet |
Diametric-species Diversity Boreal forest Human impact Forest structure Forest composition Metsien ekologia ja käyttö Forest Ecology and Management skoglig ekologi och resurshushållning |
description |
Forest structural and compositional diversity is of great importance for forest biodiversity, functioning, and response to disturbances. The purpose of this research was to examine how human impact has affected the structural-compositional diversity of mature pine-dominated boreal forest in boreal Fennoscandia. For this a new approach was used, based on the classification of tree sizes by the diameter at breast height (dbh) and tree species, resulting in a new variable, the diametric-species, the variation of which describes the structural-compositional diversity of the forest. This variable was used to compare the structural-compositional diversity among three forest classes with different degree of human influence (near-natural, selectively logged and managed forest), using rarefaction as the main tool of analysis, complemented by analyses based on common diversity indices. For comparison, the rarefaction analysis was also done for the tree species classification. The results of the rarefaction analysis of the diametric-species showed that the near-natural forest was the most diverse and the managed forest the least diverse. The analysis solely on tree species showed no significant differences among the forest classes of different human impact. The Shannon diversity index showed no significant difference between the forest classes for the diametric-species and only tree species classifications, but the Simpson index found a slight difference between the selectively logged and managed forest classes for the diametric-species classification. Furthermore, the Sorensen index detected a difference among forest classes for diametric-species and failed to detect one for the tree species classification, which supports the rarefaction findings. We conclude that forest management has had a negative impact on forest compositional and structural diversity in mature Scots pine forests. The analysis also shows that the diametric-species classification can be a useful tool for forest diversity analysis and comparison |
author2 |
Helsingin yliopisto, Maatalous-metsätieteellinen tiedekunta, Metsätieteiden laitos University of Helsinki, Faculty of Agriculture and Forestry, Department of Forest Sciences Helsingfors universitet, Agrikultur- och forstvetenskapliga fakulteten, Institutionen för skogsvetenskaper |
format |
Master Thesis |
author |
de Quesada, Gonzalo |
author_facet |
de Quesada, Gonzalo |
author_sort |
de Quesada, Gonzalo |
title |
Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia |
title_short |
Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia |
title_full |
Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia |
title_fullStr |
Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia |
title_full_unstemmed |
Human impact on tree diametric-species diversity in Scots pine dominated old boreal forest in Fennoscandia |
title_sort |
human impact on tree diametric-species diversity in scots pine dominated old boreal forest in fennoscandia |
publisher |
Helsingin yliopisto |
publishDate |
2019 |
url |
http://hdl.handle.net/10138/299929 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_relation |
URN:NBN:fi:hulib-201903051434 http://hdl.handle.net/10138/299929 |
_version_ |
1774717450055581696 |