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Title: EFFECTS OF WET SEASON HYDRO-PATTERN ON CRAYFISH (PROCAMBARUS FALLAX) POPULATION DENSITY AND JUVENILE MORTALITY RISK.
Creator: Sommer, Jeffrey L., Dorn, Nathan J., Florida Atlantic University, Department of Environmental Sciences, Charles E. Schmidt College of Science
Abstract/Description: Distribution and abundance of water impacts population dynamics and habitat structure within a wetland ecosystem. It is known that drought can interfere with trophic dynamics and temporarily free crayfish from the threat of predation by population limiting fish predators in seasonal freshwater wetlands. Less is known about wet season water depths, and their effect on predator prey interactions. In order to address this, I conducted a two-and-a-half-year study in which I experimentally...
Show moreDistribution and abundance of water impacts population dynamics and habitat structure within a wetland ecosystem. It is known that drought can interfere with trophic dynamics and temporarily free crayfish from the threat of predation by population limiting fish predators in seasonal freshwater wetlands. Less is known about wet season water depths, and their effect on predator prey interactions. In order to address this, I conducted a two-and-a-half-year study in which I experimentally manipulated the wet season water depth in four 8 ha replicate wetlands of the central Everglades, allowing two wetlands to be flooded as natural rainfall patterns would allow (unconstrained hydro-pattern) and two wetlands to experience a constrained hydro-pattern in which the maximum depths to which they were flooded was limited. I discovered that crayfish, small marsh fish, and large bodied predatory fish populations were unaffected by the water depth difference between the hydro-pattern treatments. Unlike fauna, flora did respond to the hydro-pattern treatments with stem densities increasing in the wetlands under the constrained hydro-pattern treatment.
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Date Issued: 2021
PURL: http://purl.flvc.org/fau/fd/FA00013738
Subject Headings: Crayfish, Procambarus, Wetland ecology
Format: Document (PDF)

Title: Crayfish (Procambarus spp.) sorting and density effects across a predator gradient.
Creator: Kellogg, Christopher M., Dorn, Nathan, Graduate College
Date Issued: 2011-04-08
PURL: http://purl.flvc.org/fcla/dt/3165803
Subject Headings: Crayfish culture, Predation (Biology), Sunfishes
Format: Document (PDF)

Title: An evaluation of potential diets for the culture of postpueruli spiny lobsters Panulirus argus (Palinuridae).
Creator: Cox, Serena L., Davis, Megan
Date Issued: 2009
PURL: http://purl.flvc.org/FCLA/DT/3174107
Subject Headings: Spiny lobsters, Spiny lobster culture, Sea crayfish
Format: Document (PDF)

Title: Cascading effects of vegetation on peat soil properties and crayfish survival in the Florida Everglades.
Creator: Chapman, Alexander, Benscoter, Brian, Dorn, Nathan, Graduate College
Date Issued: 2013-04-12
PURL: http://purl.flvc.org/fcla/dt/3361281
Subject Headings: Everglades (Fla.), Peat soils, Crayfish, Cattails, Multitrophic interactions (Ecology)
Format: Document (PDF)

Title: The cascading impacts of vegetation on peat soil properties and crayfish survival in the Florida everglades.
Creator: Chapman, Alexander, Benscoter, Brian, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Changes in vegetation may influence the quality and quantity of the underlying organic peat soils and have impacts on faunal populations. My goal was to determine whether shifts from native slough communities to invasive cattail in the Florida Everglades could affect peat characteristics that could cascade to impact the dry season survival of crayfish (Procambarus fallax). I contrasted peat soils from native slough and cattail-invaded sites as alternative dry-season burrowing substrates for...
Show moreChanges in vegetation may influence the quality and quantity of the underlying organic peat soils and have impacts on faunal populations. My goal was to determine whether shifts from native slough communities to invasive cattail in the Florida Everglades could affect peat characteristics that could cascade to impact the dry season survival of crayfish (Procambarus fallax). I contrasted peat soils from native slough and cattail-invaded sites as alternative dry-season burrowing substrates for crayfish. Cattail peat had higher average bulk density and inorganic content within the first ten centimeters of the soil profile. Crayfish showed marginally greater initial burrowing success in slough peat than in cattail peat but survival was equivalent in both peat soils and high overall. Understanding these indirect linkages between vegetation and crayfish populations in the Everglades can provide insight on the consequences of plant invasion on ecosystem trophic dynamics.
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Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004091, http://purl.flvc.org/fau/fd/FA00004091
Subject Headings: Crayfish (Ecology), Ecosystem management, Everglades National Park (Fla.), Vegetation dynamics -- Florida -- Everglades National Park
Format: Document (PDF)

Title: IMPORTANCE OF FRESHWATER PREY FOR NESTING WHITE IBIS EUDOCIMUS ALBUS IN SOUTHERN FLORIDA WETLANDS.
Creator: Cocoves, Tasso C., Dorn, Nathan, Florida Atlantic University, Environmental Studies Program, Charles E. Schmidt College of Science
Abstract/Description: Avian reproduction is generally resource dependent, and resource availability can vary through time and space. Wading birds breeding activity in southern Florida wetlands is limited by availability of aquatic prey, which is largely influenced by seasonal hydrodynamics. Restoration of natural hydrologic patterns is expected to increase populations and return breeding activity in the southern Everglades, but which prey support successful breeding at coastal colonies is unknown. To address this,...
Show moreAvian reproduction is generally resource dependent, and resource availability can vary through time and space. Wading birds breeding activity in southern Florida wetlands is limited by availability of aquatic prey, which is largely influenced by seasonal hydrodynamics. Restoration of natural hydrologic patterns is expected to increase populations and return breeding activity in the southern Everglades, but which prey support successful breeding at coastal colonies is unknown. To address this, I examined prey use of nesting White Ibis (Eudocimus albus) at coastal colonies in Everglades National Park (ENP) in a two-year observational study. I also examined ibis diets at nesting colonies located in three regions of the Everglades to better understand regional variation in trophic support of ibis reproduction. I found that crayfish and fish were used extensively in ENP in a year with exceptional ibis breeding activity, and I provide evidence that lengthened hydroperiods in higher elevation marl prairies may enhance crayfish production and availability in the southern Everglades. I found that crayfish were the most important prey type in all regions of the Everglades when reproductive effort was highest. These results add to the growing body of evidence that crayfish are important prey for ibis reproductive success in all parts of the Everglades, and suggest that increasing water flowing into the southern Everglades may incite greater nesting at historic colony locations. With this knowledge we can forecast how wading birds, and more generally wetlands of southern Florida, will respond to a changing environment and potential restoration scenarios.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013367
Subject Headings: Eudocimus albus, White ibis, Birds--Reproduction, Nest building, Crayfish, Wetland hydrology, Everglades National Park (Fla)
Format: Document (PDF)

Title: Population distribution, habitat selection, and life history of the slough crayfish (Procambarus fallax) in the ridge-slough landscape of the central Everglades.
Creator: Van der Heiden, Craig., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Understanding where and why organisms are distributed in the environment are central themes in ecology. Animals live in environments in which they are subject to competing demands, such as the need to forage, to find mates, to reproduce, and to avoid predation. Optimal habitats for these various activities are usually distributed heterogeneously in the landscape and may vary both spatially and temporally, causing animals to adjust their locations in space and time to balance these conflicting...
Show moreUnderstanding where and why organisms are distributed in the environment are central themes in ecology. Animals live in environments in which they are subject to competing demands, such as the need to forage, to find mates, to reproduce, and to avoid predation. Optimal habitats for these various activities are usually distributed heterogeneously in the landscape and may vary both spatially and temporally, causing animals to adjust their locations in space and time to balance these conflicting demands. In this dissertation, I outline three studies of Procambarus fallax in the ridge-slough landscape of Water conservation Area 3A (WCS-3A). The first section outlines an observational sampling study of crayfish population distribution in a four hectare plot, where I statistically model the density distribution at two spatial scales. ... Secondly, I use radio telemetry to study individual adult crayfish movements at two study sites and evaluate habitat selection using Resource Selection Functions. In the third section, I test the habitat selection theory, ideal free distribution, by assessing performance measures (growth and mortality) of crayfish in the two major vegetation types in a late wet season (November 2007) and early wet season (August 2009).
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3356890
Subject Headings: Habitat selection, Statistical methods, Fish habitat improvement, Crayfish, Life cycles, Wetland ecology, Habitat (Ecology)
Format: Document (PDF)

Title: The effect of hydroperiod on the growth of the crayfish species Procambarus alleni and Procambarus fallax: Two keystone species in the Florida Everglades.
Creator: Gardner, Matthew D., Florida Atlantic University, Volin, John C.
Abstract/Description: The Everglades ecosystem is home to two species of freshwater crayfish: the Everglades crayfish Procambarus alleni and the slough crayfish Procambarus fallax. These species play a key ecological role by transporting energy from primary producers to higher trophic levels. Understanding the factors that regulate crayfish growth is an essential step in restoring their productivity in the Everglades ecosystem. In order to determine the effect of hydroperiod on crayfish growth, I collected...
Show moreThe Everglades ecosystem is home to two species of freshwater crayfish: the Everglades crayfish Procambarus alleni and the slough crayfish Procambarus fallax. These species play a key ecological role by transporting energy from primary producers to higher trophic levels. Understanding the factors that regulate crayfish growth is an essential step in restoring their productivity in the Everglades ecosystem. In order to determine the effect of hydroperiod on crayfish growth, I collected crayfish from the Florida Everglades and subjected them to one of three hydroperiod treatments. The growth of both crayfish species in reduced hydroperiod treatments was significantly less than those in long hydroperiod treatments. Procambarus alleni had a significantly faster initial growth rate than P. fallax, which may give it a competitive advantage in shorter hydroperiod marshes and help explain the distributions of these two species. The results of this study indicate that lengthening hydroperiods in the Everglades ecosystem may have a positive effect on crayfish productivity.
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Date Issued: 2006
PURL: http://purl.flvc.org/fcla/dt/13361
Subject Headings: Ecosystem management--Florida--Everglades National Park, Everglades National Park (Fla ), Crayfish--Habitat--Florida--Everglades National Park, Wetland ecology--Florida--Everglades National Park
Format: Document (PDF)

FAU Theses and Dissertations (5)	+ -
FAU Graduate Student Research (2)	+ -
HBOI Faculty Contributions (1)	+ -

Crayfish (4)	+ -
Wetland ecology (2)	+ -
Birds--Reproduction (1)	+ -
Cattails (1)	+ -
Crayfish (Ecology) (1)	+ -

Crayfish culture (1)	+ -
Crayfish--Habitat--Florida--Everglades National Park (1)	+ -
Ecosystem management (1)	+ -
Ecosystem management--Florida--Everglades National Park (1)	+ -
Eudocimus albus (1)	+ -
Everglades (Fla.) (1)	+ -
Everglades National Park (Fla ) (1)	+ -
Everglades National Park (Fla) (1)	+ -
Everglades National Park (Fla.) (1)	+ -
Fish habitat improvement (1)	+ -
Habitat (Ecology) (1)	+ -
Habitat selection (1)	+ -
Life cycles (1)	+ -
Multitrophic interactions (Ecology) (1)	+ -
Nest building (1)	+ -
Peat soils (1)	+ -
Predation (Biology) (1)	+ -
Procambarus (1)	+ -
Sea crayfish (1)	+ -
Spiny lobster culture (1)	+ -
Spiny lobsters (1)	+ -
Statistical methods (1)	+ -
Sunfishes (1)	+ -
Vegetation dynamics -- Florida -- Everglades National Park (1)	+ -
Wetland ecology--Florida--Everglades National Park (1)	+ -

Everglades (1)	+ -
Florida (1)	+ -

Electronic Thesis or Dissertation (5)	+ -
abstract (2)	+ -
article (1)	+ -

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