Landscape Ecology

, Volume 30, Issue 10, pp 1893–1912

Linking metrics of landscape pattern to hydrological process in a lotic wetland

  • Jing Yuan
  • Matthew J. Cohen
  • David A. Kaplan
  • Subodh Acharya
  • Laurel G. Larsen
  • Martha K. Nungesser
Research Article

DOI: 10.1007/s10980-015-0219-z

Cite this article as:
Yuan, J., Cohen, M.J., Kaplan, D.A. et al. Landscape Ecol (2015) 30: 1893. doi:10.1007/s10980-015-0219-z

Abstract

Context

Strong reciprocal interactions exist between landscape patterns and ecological processes. In wetlands, hydrology is the dominant abiotic driver of ecological processes and both controls, and is controlled, by vegetation presence and patterning. We focus on binary patterning in the Everglades ridge-slough landscape, where longitudinally connected flow, principally in sloughs, is integral to landscape function. Patterning controls discharge competence in this low-gradient peatland, with important feedbacks on hydroperiod and thus peat accretion and patch transitions.

Objectives

To quantitatively predict pattern effects on hydrologic connectivity and thus hydroperiod.

Methods

We evaluated three pattern metrics that vary in their hydrologic specificity. (1) Landscape discharge competence considers elongation and patch-type density that capture geostatistical landscape features. (2) Directional connectivity index (DCI) extracts both flow path and direction based on graph theory. (3) Least flow cost (LFC) is based on a global spatial distance algorithm strongly analogous to landscape water routing, where ridges have higher flow cost than sloughs because of their elevation and vegetation structure. Metrics were evaluated in comparison to hydroperiod estimated using a numerically intensive hydrologic model for synthetic landscapes. Fitted relationships between metrics and hydroperiod for synthetic landscapes were extrapolated to contemporary and historical maps to explore hydroperiod trends in space and time.

Results

Both LFC and DCI were excellent predictors of hydroperiod and useful for diagnosing how the modern landscape has reorganized in response to modified hydrology.

Conclusions

Metric simplicity and performance indicates potential to provide hydrologically explicit, computationally simple, and spatially independent predictions of landscape hydrology, and thus effectively measure of restoration performance.

Keywords

Spatial metrics Connectivity Hydrology Hydroperiod Ridge and slough Wetland Everglades 

Funding information

Funder NameGrant NumberFunding Note
US Army Corps of Engineers via the Cooperative Ecosystem Studies Unit Unit (CESU) and the Monitoring and Assessment Plan (MAP)
  • 12-2-0011

Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Jing Yuan
    • 1
  • Matthew J. Cohen
    • 2
  • David A. Kaplan
    • 3
  • Subodh Acharya
    • 2
  • Laurel G. Larsen
    • 4
  • Martha K. Nungesser
    • 5
  1. 1.School of Natural Resources and EnvironmentUniversity of FloridaGainesvilleUSA
  2. 2.School of Forest Resources and ConservationUniversity of FloridaGainesvilleUSA
  3. 3.Department of Environmental Engineering SciencesUniversity of FloridaGainesvilleUSA
  4. 4.Department of GeographyUniversity of CaliforniaBerkeleyUSA
  5. 5.Everglades Systems Assessment SectionSouth Florida Water Management DistrictWest Palm BeachUSA

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