NDLI: Herbaceous Understorey: An Overlooked Player in Forest Landscape Dynamics?

Content Provider	Springer Nature Link
Author	Thrippleton, Timothy Bugmann, Harald Kramer Priewasser, Kathrin Snell, Rebecca S.
Copyright Year	2016
Abstract	Dense herbaceous understorey layers can impact tree regeneration and thereby affect forest succession. However, the implications of this interaction on large spatial and temporal scales are not well understood. To analyse the role of overstorey–understorey interactions for forest dynamics, we implemented an understorey layer (composed of the plant functional types grasses, forbs, ferns, herbs and shrubs) in the forest landscape model LandClim, focusing on competition for light as the main mode of interaction. The model was used to simulate post-disturbance dynamics over an elevational gradient of 560–2800 m a.s.l. in Central Europe. Simulation results showed strong impacts of the herbaceous understorey on tree regeneration within the first decades, but generally little effect on late-successional forests, i.e. not providing any evidence for ‘arrested’ succession. The results also demonstrated varying overstorey–understorey interactions across the landscape: strongest effects were found at low to mid elevations of the study landscapes, where tree establishment was substantially delayed. At high elevations, tree growth and establishment were more limited by low temperatures, and the effect of light competition from the understorey was negligible. Although the inclusion of large windthrow disturbances increased the biomass of herbaceous understorey across the landscape, this had only a small impact on the overstorey due to the presence of advance regeneration of trees. Overall, our results demonstrate that the herbaceous understorey can have a significant impact for forest landscape dynamics through light competition, and that non-woody plants should not be neglected in forest modelling.
Starting Page	1240
Ending Page	1254
Page Count	15
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	19
Issue Number	7
e-ISSN	14350629
Language	English
Publisher	Springer US
Publisher Date	2016-06-08
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	herbaceous vegetation overstorey–understorey interaction arrested succession Black Forest Dischma valley central Alps dynamic vegetation model Ecology Plant Sciences Zoology Environmental Management Geoecology/Natural Processes Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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