Florida Entomologist (2020) 103, 180-190

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Leo Ohyama, Joshua R. King and Benjamin M. Gochnour (2020)
Changes in an invaded Florida ant (Hymenoptera: Formicidae) community over 25 years
Florida Entomologist 103 (2), 180-190
Abstract: Exotic invasive species are one of the most widespread and common agents of change in ecosystems worldwide. Here, we are focused on community-level changes associated with the appearance and persistence of exotic species in an ecosystem over more than 2 decades. We combined datasets of Florida's ant (Hymenoptera: Formicidae) community from Wekiwa Springs State Park, Florida, USA, spanning 25 yr, which included 3 sampling events in several distinct upland ecosystems. Species accumulation curves, non-parametric species estimators, community similarity indices, and ratios of exotic to native ants were used to assess sampling effort, including patterns of diversity, and changes in community composition. Our data showed that the ant community of Wekiwa Springs has at least 4 exotic species present in all of the ecosystems sampled within the park. These upland ecosystems are accumulating exotics slowly and, with one exception, there is no clear signal that the exotic species are displacing native species. The likely exception is the invasive fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), causing local extinction of the native fire ant Solenopsis geminata (Fabricius) (Hymenoptera: Formicidae). Continued long-term monitoring efforts are necessary to understand how these exotics may impact native communities in the future.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Solenopsis invicta U.S.A. (SE)
Pheidole obscurithorax U.S.A. (SE)
Tetramorium simillimum U.S.A. (SE)
Ochetellus glaber U.S.A. (SE)
Pheidole moerens U.S.A. (SE)
Pseudomyrmex gracilis U.S.A. (SE)