Mountain birch facilitates Scots pine in the northern tree line – does improved soil fertility have a role?

Show full item record



Permalink

http://hdl.handle.net/10138/298187

Citation

Mikola , J T , Silfver , T H & Rousi , M 2018 , ' Mountain birch facilitates Scots pine in the northern tree line – does improved soil fertility have a role? ' , Plant and Soil , vol. 423 , no. 1-2 , pp. 205-213 . https://doi.org/10.1007/s11104-017-3517-1

Title: Mountain birch facilitates Scots pine in the northern tree line – does improved soil fertility have a role?
Author: Mikola, Juha Tapio; Silfver, Tarja Hannele; Rousi, Matti
Contributor: University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
Date: 2018-02
Language: eng
Number of pages: 9
Belongs to series: Plant and Soil
ISSN: 0032-079X
URI: http://hdl.handle.net/10138/298187
Abstract: Facilitative plant-plant interactions are common in harsh environments such as Arctic and alpine tree lines. In Fennoscandia, mountain birch dominates tree lines, but mixes with Scots pine in less severe areas. Using over 30-yr. old Scots pine common gardens, established at three locations near the present Scots pine tree line, we tested (1) if mountain birch can facilitate Scots pine numbers and (2) if improved soil fertility under mountain birch canopies has a role in facilitation. We counted the number of pines within 1-m and 3-m radii of the tallest mountain birch vs. a random spot in 70-75 planting plots and sampled soil for nutrients at 0.3-, 1- and 3-m distance to the birch in ten plots in each location. Number of Scots pines was 29% higher within a 1-m radius of a mountain birch than of a random spot. This effect did not depend on location, although the locations differed significantly in soil fertility, and no effect was detected within a 3-m radius. Concentrations of water, NH4, NO3 and PO4 decreased significantly with increasing distance to a mountain birch, but only in the least fertile location. Mountain birch can significantly facilitate Scots pine in tree line conditions. However, unlike we expected, improved soil fertility under birch canopies may not have a general role in facilitation.
Subject: Facilitation
Fennoscandia
Soil fertility
Stress
Subarctic
Tree line
CLIMATE-CHANGE
POSITIVE INTERACTIONS
ECOSYSTEM PROPERTIES
PLANT-COMMUNITIES
ROCKY-MOUNTAINS
ALPINE-TREELINE
NORWAY SPRUCE
COMPETITION
SYLVESTRIS
GRADIENTS
4112 Forestry
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Mikola_et_al._2 ... he_northern_treeline_.docx 1.104Mb Microsoft Word View/Open

This item appears in the following Collection(s)

Show full item record