Christa L. Zweig

Dr. Christa L. Zweig

South Florida Water Management District, 8894 Belvedere Road, West Palm Beach, FL 33411, USA

Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 September 2015 in Journal of Land Use Science
Verified
Journal Article
Closed access
KBKaren M. Bailey
Karen M. Bailey
RMRobert A. McCleery
Robert A. McCleery
MBMichael W. Binford
Michael W. Binford
CZChrista L. Zweig
Christa L. Zweig
The landscape surrounding protected areas influences their ability to maintain ecosystem functions and achieve conservation goals. As anthropogenic intensification continues, it is important to monitor land-use and land-cover change in and around protected areas. We measure land-cover change surrounding protected areas in the Maputaland-Pondoland-Albany Biodiversity hotspot from the 1980s to present. Using Landsat imagery, we classified land cover within and around each protected area. Agricultural land uses were increasing and often directly border protected area boundaries. Human settlements increased around every protected area, potentially increasing human activity along the edges of protected areas and threatening their ecological integrity. Urban expansion around protected areas varied but increased as much as 10%. Woody vegetation cover varied both within and around protected areas with possible evidence of deforestation and shrub encroachment throughout the hotspot. We recommend monitoring land cover across southeastern Africa to better understand regional trends in land-use impacts to protected areas.

24 June 2014 in Wildlife Society Bulletin
Verified
Journal Article
Closed access
PDF file
RMRobert A. McCleery
Robert A. McCleery
CZChrista L. Zweig
Christa L. Zweig
MDMelissa A. Desa
Melissa A. Desa
RHRodney Hunt
Rodney Hunt
WKWiley M. Kitchens
Wiley M. Kitchens
HPH. Franklin Percival
H. Franklin Percival

1 July 2009 in Ecology
Verified
Journal Article
Open access
PDF file
CZChrista L. Zweig
Christa L. Zweig
WKW. M. Kitchens
W. M. Kitchens
The complexity of ecosystems and mechanisms of succession are often simplified by linear and mathematical models used to understand and predict system behavior. Such models often do not incorporate multivariate, nonlinear feedbacks in pattern and process that include multiple scales of organization inherent within real‐world systems. Wetlands are ecosystems with unique, nonlinear patterns of succession due to the regular, but often inconstant, presence of water on the landscape. We develop a general, nonspatial state and transition (S and T) succession conceptual model for wetlands and apply the general framework by creating annotated succession/management models and hypotheses for use in impact analysis on a portion of an imperiled wetland. The S and T models for our study area, Water Conservation Area 3A South (WCA3), Florida, USA, included hydrologic and peat depth values from multivariate analyses and classification and regression trees. We used the freeware Vegetation Dynamics Development Tool as an exploratory application to evaluate our S and T models with different management actions (equal chance [a control condition], deeper conditions, dry conditions, and increased hydrologic range) for three communities: slough, sawgrass (Cladium jamaicense), and wet prairie. Deeper conditions and increased hydrologic range behaved similarly, with the transition of community states to deeper states, particularly for sawgrass and slough. Hydrology is the primary mechanism for multi‐state transitions within our study period, and we show both an immediate and lagged effect on vegetation, depending on community state. We consider these S and T succession models as a fraction of the framework for the Everglades. They are hypotheses for use in adaptive management, represent the community response to hydrology, and illustrate which aspects of hydrologic variability are important to community structure. We intend for these models to act as a foundation for further restoration management and experimentation which will refine transition and threshold concepts.

4 February 2015 in Wetlands
Verified
Journal Article
Closed access
PDF file
CZChrista L. Zweig
Christa L. Zweig
MBMatthew A. Burgess
Matthew A. Burgess
HPH. Franklin Percival
H. Franklin Percival
WKWiley M. Kitchens
Wiley M. Kitchens

1 December 2008 in Wetlands
Verified
Journal Article
Closed access
PDF file
CZChrista L. Zweig
Christa L. Zweig
WKWiley M. Kitchens
Wiley M. Kitchens

18 March 2010 in Restoration Ecology
Verified
Journal Article
Closed access
PDF file
CZChrista L. Zweig
Christa L. Zweig
WKWiley M. Kitchens
Wiley M. Kitchens