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The resilience and functional role of moss in boreal and arctic ecosystems

New Phytologist

By:
, , , , , ,
DOI: 10.1111/j.1469-8137.2012.04254.x

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Abstract

Mosses in northern ecosystems are ubiquitous components of plant communities, and strongly influence nutrient, carbon and water cycling. We use literature review, synthesis and model simulations to explore the role of mosses in ecological stability and resilience. Moss community responses to disturbance showed all possible responses (increases, decreases, no change) within most disturbance categories. Simulations from two process-based models suggest that northern ecosystems would need to experience extreme perturbation before mosses were eliminated. But simulations with two other models suggest that loss of moss will reduce soil carbon accumulation primarily by influencing decomposition rates and soil nitrogen availability. It seems clear that mosses need to be incorporated into models as one or more plant functional types, but more empirical work is needed to determine how to best aggregate species. We highlight several issues that have not been adequately explored in moss communities, such as functional redundancy and singularity, relationships between response and effect traits, and parameter vs conceptual uncertainty in models. Mosses play an important role in several ecosystem processes that play out over centuries – permafrost formation and thaw, peat accumulation, development of microtopography – and there is a need for studies that increase our understanding of slow, long-term dynamical processes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The resilience and functional role of moss in boreal and arctic ecosystems
Series title:
New Phytologist
DOI:
10.1111/j.1469-8137.2012.04254.x
Volume
196
Issue:
1
Year Published:
2012
Language:
English
Publisher:
Wiley
Publisher location:
Hoboken, NJ
Contributing office(s):
Alaska Cooperative Fish and Wildlife Research Unit
Description:
19 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
New Phytologist
First page:
49
Last page:
67