Hurricane effects on subtropical pine rocklands of the Florida Keys
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Material Information

Title:
Hurricane effects on subtropical pine rocklands of the Florida Keys
Series Title:
Climatic Change Volume 107
Creator:
Saha, Sonali
Bradley, Keith
Ross, Michael S.
Hughes, Phillip
Wilmers, Thomas
Ruiz, Pablo L.
Bergh, Chris
Affiliation:
The Institute for Regional Conservation
The Institute for Regional Conservation
Florida International University -- Department of Earth &Environment -- Southeast Environmental Research Center
U.S. Fish & Wildlife Service
US Fish &Wildlife Service
Florida International University -- Southeast Environmental Research Center
The Nature Conservancy
Publisher:
Springer Science + Business Media B.V.
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Climate Change ( lcsh )
unknownFlorida Keys (Fla.)
unknownFlorida ( lcsh )
Sea Level Rise ( lcsh )
Hurricanes ( lcsh )
Pine trees ( lcsh )

Notes

Abstract:
We investigate the effects of Hurricane Wilma’s storm surge (23–24 October 2005) on the dominant tree Pinus elliottii var densa (South Florida slash pine) and rare plant species in subtropical pine rocklands of the Lower Florida Keys. We examine the role of elevation on species abundance in 1995 (Hurricane Betsy in 1965), 2005 (Hurricane Georges in 1998), and 2008 (Hurricane Wilma in 2005) to investigate if hurricanes influence abundance by eliminating plants at lower elevation on Big Pine Key, the largest island in the Lower Florida Keys.We compare densities before and after Hurricane Wilma over the 2005–2008 sampling period and examine the role of elevation on changes in pine and rare species densities three years after Hurricane Wilma. We use elevation to assess the impact of hurricanes because elevation determined whether a location was influenced by storm surge (maximum surge of 2 m) in the Lower Florida Keys, where pine rocklands occur at a maximum elevation of 3 m. In 1995 (30 years after a major storm), elevation did not explain the abundance of South Florida slash pine or Chamaecrista lineata, but explained significant variation in abundance of Chamaesyce deltoidea. The latter two species are rare herbaceous plants restricted to pine rocklands. In 2008, 3 years after Hurricane Wilma, the positive relationship between elevation and abundance was strongest for South Florida slash pine, C. deltoidea, and C. lineata. Effects of Hurricane Wilma were not significant for rare species with wider distribution, occurring in plant communities adjacent to pine rocklands and in disturbed rocklands. Our results suggest that hurricanes drive population dynamics of South Florida slash pine and rare species that occur exclusively in pine rocklands at higher elevations. Rare species restricted to pine rocklands showed dramatic declines after Hurricane Wilma and were eliminated at elevations <0.5 m.Widely distributed rare species did not show significant changes in density after Hurricane Wilma. Abundance increased with elevation for South Florida slash pine and C. lineata after the hurricane. In an environment influenced by sea level rise, concrete plans to conserve pine ecosystems are warranted. Results from this study will help define conservation strategies by strengthening predictive understanding of plant responses to disturbance in the backdrop of sea level rise.

Record Information

Source Institution:
Florida International University
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