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Scaling relations between riparian vegetation and stream order in the Whitewater River network, Kansas, USA
Journal article   Peer reviewed

Scaling relations between riparian vegetation and stream order in the Whitewater River network, Kansas, USA

William Dunn, Bruce Milne, Ricardo Mantilla and Vijay Gupta
Landscape Ecology, Vol.26(7), pp.983-997
08/2011
DOI: 10.1007/s10980-011-9622-2

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Abstract

Riparian communities have been well-studied along individual streams, but not within the context of networks of which streams are a part. To study networks, hydrologists use Horton–Strahler ordering to assign streams to discrete categories in which increasing numerical value (ω) reflects increasing size of the stream and complexity of the network. A key use of this classification method has been to demonstrate scaling relations between hydrogeomorphic variables and order. These relations now provide a foundation to determine how ecological processes are associated with the geometry and topology of river networks. We used geographic information systems (GIS) to map and measure the stream network and riparian vegetation of the Whitewater River basin of eastern Kansas, USA. With the resulting data, we tested if (1) riparian vegetation scaled with order, and (2) riparian vegetation at confluences of two streams differed from that found along constituent streams. Most characteristics of riparian vegetation scaled with order. In confluence zones, density and diversity of riparian vegetation generally were equivalent to that of the largest constituent stream. Scaling relations between riparian vegetation and order provide a framework to quantify the role of riparian vegetation in the water balance of stream networks and a tool to predict area and distribution of riparian vegetation from network topology.
Order Horton laws Horton–Strahler Landscape Ecology Ecology Life Sciences Riparian Basins Forestry Network Forestry Management Scaling Plant Sciences Streams Plant Ecology Self-similarity

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