Interactions with successional stage and nutrient status determines the life-form-specific effects of increased soil temperature on boreal forest floor vegetation

Ecology and Evolution
P O HedwallSune Linder

Abstract

The boreal forest is one of the largest terrestrial biomes and plays a key role for the global carbon balance and climate. The forest floor vegetation has a strong influence on the carbon and nitrogen cycles of the forests and is sensitive to changes in temperature conditions and nutrient availability. Additionally, the effects of climate warming on forest floor vegetation have been suggested to be moderated by the tree layer. Data on the effects of soil warming on forest floor vegetation from the boreal forest are, however, very scarce. We studied the effects on the forest floor vegetation in a long-term (18 years) soil warming and fertilization experiment in a Norway spruce stand in northern Sweden. During the first 9 years, warming favored early successional species such as grasses and forbs at the expense of dwarf shrubs and bryophytes in unfertilized stands, while the effects were smaller after fertilization. Hence, warming led to significant changes in species composition and an increase in species richness in the open canopy nutrient limited forest. After another 9 years of warming and increasing tree canopy closure, most of the initial effects had ceased, indicating an interaction between forest succession and warming. ...Continue Reading

References

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Citations

Feb 15, 2019·Ecological Applications : a Publication of the Ecological Society of America·Per-Ola HedwallJoachim Strengbom
Mar 12, 2020·Ecological Applications : a Publication of the Ecological Society of America·Katariina E M VuorinenJames D M Speed
Oct 3, 2018·Ecology and Evolution·Kristian PetersSteffen Neumann
Feb 15, 2019·The Science of the Total Environment·Maija SalemaaAino Smolander

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Software Mentioned

mgcv
R Development Core Team
GAMM
Vegan
R
R package labdsv
PERMANOVA
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