NDLI: Spatial pattern formation of coastal vegetation in response to external gradients and positive feedbacks affecting soil porewater salinity: a model study

Content Provider	Springer Nature Link
Author	Jiang, Jiang DeAngelis, Donald L. Smith, Thomas J. Teh, Su Yean Koh, Hock Lye
Copyright Year	2011
Abstract	Coastal vegetation of South Florida typically comprises salinity-tolerant mangroves bordering salinity-intolerant hardwood hammocks and fresh water marshes. Two primary ecological factors appear to influence the maintenance of mangrove/hammock ecotones against changes that might occur due to disturbances. One of these is a gradient in one or more environmental factors. The other is the action of positive feedback mechanisms, in which each vegetation community influences its local environment to favor itself, reinforcing the boundary between communities. The relative contributions of these two factors, however, can be hard to discern. A spatially explicit individual-based model of vegetation, coupled with a model of soil hydrology and salinity dynamics is presented here to simulate mangrove/hammock ecotones in the coastal margin habitats of South Florida. The model simulation results indicate that an environmental gradient of salinity, caused by tidal flux, is the key factor separating vegetation communities, while positive feedback involving the different interaction of each vegetation type with the vadose zone salinity increases the sharpness of boundaries, and maintains the ecological resilience of mangrove/hammock ecotones against small disturbances. Investigation of effects of precipitation on positive feedback indicates that the dry season, with its low precipitation, is the period of strongest positive feedback.
Starting Page	109
Ending Page	119
Page Count	11
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	27
Issue Number	1
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-12-02
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Individual-based model Positive feedback Environmental gradient Ecotone Vegetation aggregation Mangrove vegetation Plant Sciences Landscape Ecology Forestry Plant Ecology Ecology Forestry Management
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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