Professor Emeritus of Biological Sciences
PhD, 1971 Cornell University
Biology and conservation of arthropods
Research descriptionMost of my research is done in native Florida scrub at the Archbold Biological Station, located at the southern terminus of the Lake Wales Ridge south of Lake Placid, Highlands County, FL. Florida scrub in general consists of a patchwork of ecosystems on ancient sand dunes that are dominated by shrubs adapted to nutrient-poor soils, wildfires, drought, and hurricanes. These are among the oldest and most restricted ecosystems in the world. Because of its unusually high degree of species endemism, Florida scrub is a globally important component of biodiversity. However, little is known about the many arthropods that are narrowly endemic to Florida scrub. We have documented that 76+ species of insects, millipedes, and spiders have their entire species distributions restricted largely to the Lake Wales Ridge, an strip that is approximately 10 miles wide and 120 miles long, running down the middle of peninsular Florida.
I am conducting long-term studies of burrowing wolf spiders and the red widow spider that are endemic to the scrub located on the Lake Wales Ridge in central Florida. I am gathering information about the distribution and abundance these spiders in habitats that naturally undergo burning every about decade and flooding every half-century of so.
I also am performing studies of the natural history of millipedes, spiders, and insects in the Florida scrub. For example, we have recently documented seasonal activity and feeding preferences in the rare scrub millipede, Floridobolus penneri. To our amazement, this giant millipede occurs predominantly in rosemary scrub, a open, barren habitat. This finding is the opposite of what we expected since most millipedes prefer mesic sites with leaf litter and rotting wood on the ground.
In October 2008 Dr. Mark Deyrup and I began a 3-year project at Archbold designed to survey specialized Florida scrub arthropods on protected lands (state, federal, private) on the Lake Wales Ridge. Our major goals are: accumulate information on potentially endangered species; demonstrate effectiveness of habitat acquisition for proactive protection on non-target species. Our methods are: trapping, observation, GIS correlation. Results: trap testing; background research on 70+ species; synoptic collection for identification; advertising for interns; setting up data bases. This project is funded by a grant from the Florida Dept. of Fish and Wildlife as part of the Florida Forever Project.
Carrel, J.E., Deyrup, M. Analysis of Body Size, Web Size, and Diet in Two Congeneric Orb-Weaving Spiders (Araneae: Araneidae) Syntopic in Florida Scrub (2019) Florida Entomologist, 102 (2), pp. 388-394. DOI: 10.1653/024.102.0215
Carrel, J.E. 2015. Growth and nest hole size preference in immature southern house spiders (Araneae: Filistatidae): Are they constrained consumers? Florida Entomologist 98: 377-379.
Lewis, J.D., G.M. Connette, M.A. Deyrup, J. E. Carrel, and R.D. Semlitsch. 2014. Relationship between diet and microhabitat use of red-legged salamanders (Plethodon shermani) in southwest North Carolina. Copeia 2014(2):201-205.
Carrel, J.E., and M. Deyrup. 2014. Red widow spiders (Araneae: Theridiidae) prey extensively on scarab beetles endemic in Florida scrub. Florida Entomologist 97: 130-137.
Carrel, J.E., Deyrup, M. 2014. Red widow spiders (Araneae: Theridiidae) prey extensively on scarab beetles endemic in Florida scrub. Florida Entomologist, 97(1):130-137.
Deyrup, M., L. Deyrup, and J. Carrel. 2013. Ant species in the diet of a Florida population of eastern narrow-mouth toads, Gastrophryne carolinensis. Southeastern Natrualist 12: 367-378.
Deyrup, M., L. Deyrup, and J. Carrel. 2013. Ant species in the diet of a Florida population of eastern narrow-mouth toads, Gastrophryne carolinensis. Southeastern Natrualist 12: 367-378. Carrel, J.E., and M. Deyrup. 2014. Red widow spiders (Araneae: Theridiidae) prey extensively on scarab beetles endemic in Florida scrub. Florida Entomologist 97: 130-137.
Carrel, J.E. and E. Britt. 2009. The whipscorpion, Mastigoproctus giganteus (Lucas) (Uropygi: Thelyphonidae), preys on the Florida scrub millipede, Floridobolus penneri Causey (Spirobolida: Floridobolidae). Florida Entomologist (in press).
Carrel, J.E. 2008a. The effect of season of fire on density of female garden orbweavers (Araneae: Araneidae: Argiope) in Florida scrub. Florida Entomologist 91: 332-334.
Carrel, J.E. 2008b. Differential survival of Geolycosa xera archboldi and G. hubbelli (Araneae, Lycosidae) after fire in Florida scrub. Journal of Arachnology 36: 595-599.
Honors & Awards
Selected honors and awards
CASE/Carnegie Foundation Professor of the Year in Missouri 1999