A5016761270- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Aquatic Invertebrate Ecology and Behavior
- Isotope Analysis in Ecology
- Insect and Arachnid Ecology and Behavior
- Amphibian and Reptile Biology
- Soil and Water Nutrient Dynamics
- Subterranean biodiversity and taxonomy
- Fish Biology and Ecology Studies
- Turtle Biology and Conservation
- Urban Heat Island Mitigation
- Groundwater and Isotope Geochemistry
- Study of Mite Species
- Physiological and biochemical adaptations
- Urban Stormwater Management Solutions
- Plant and animal studies
- Animal Behavior and Reproduction
- Identification and Quantification in Food
- Hydrology and Watershed Management Studies
- Education and Military Integration
- Wildlife Ecology and Conservation
- Wildlife-Road Interactions and Conservation
- Urban Green Space and Health
- Cephalopods and Marine Biology
- Bird parasitology and diseases
Virginia Wesleyan College
2003-2024
Wesleyan University
2019-2024
Miami University
1997-2002
The detritivorous fish, gizzard shad ( Dorosoma cepedianum ), provides nutrients to phytoplankton in reservoirs by ingesting organic detritus associated with sediments and excreting substantial quantities of such as N P soluble forms that are highly available phytoplankton. We estimated nutrient excretion a eutrophic reservoir (Acton Lake, Ohio) during April–October 1994 measuring field‐caught fish n = 135). Excretion rates were then extrapolated release the population using quadrat rotenone...
We examined the role of omnivorous fish, gizzard shad (Dorosoma cepedianum), in transporting nutrients from sediments into water column and their subsequent impacts on phytoplankton. manipulated sediment access fish size during two mesocosm experiments to determine how these factors could alter effects In first experiment, stimulated phytoplankton only when they feed directly lake not benthic feeding was prevented by a mesh netting. second small greater extent than did an equivalent biomass...
Animals can be important in modulating ecosystem-level nutrient cycling, although their importance varies greatly among species and ecosystems. Nutrient cycling rates of individual animals represent valuable data for testing the predictions frameworks such as Metabolic Theory Ecology (MTE) ecological stoichiometry (ES). They also an set functional traits that may reflect both environmental phylogenetic influences. Over past two decades, studies animal-mediated have increased dramatically,...
We examined diet patterns of omnivorous gizzard shad Dorosoma cepedianum in Acton Lake, Ohio, during 1994-1997 using a multiple stable isotope analysis to quantify the role this species system. On most dates, zooplankton were relatively depleted δ13C (about −30‰ −25.5‰) compared with sediments (−25‰), permitting construction mixing model determine proportion C derived from benthic detritus and planktonic productivity. During periods greater biomass (>35 kg/ha), more than 35-mm standard...
We combined laboratory and field studies to experimentally assess how the effects of feeding regime time since influence nitrogen (N), phosphorus (P), N:P ratio excreted by two common freshwater fish, bluegill (Lepomis macrochirus) gizzard shad (Dorosoma cepedianum). In addition, for adult shad, we modelled excretion rates as a function nutrient content ingested sediment detritus. For both significantly increased altered ratios. species, were highest immediately after declined thereafter....
Summary 1. The St. Johns River Water Management District removed over 5.4 million kg of gizzard shad ( Dorosoma cepedianum ) from Lake Apopka, FL during 1993–2005, as a means reducing lake phosphorus and phytoplankton concentrations improving water clarity. Other steps included reduction external nutrient inputs operation treatment wetland. We measured excretion by Apopka to quantify the effect this biomanipulation. 2. Both N P were significantly affected fish body mass temperature. Larger...
Relatively little is known about the food habits of neotropical harvestmen. We used Erginulus clavotibialis (Pickard-Cambridge 1905), a locally abundant species cosmetid harvestman in Belize, choice experiment. Individuals were presented with fresh fruit (pineapple) and live invertebrate prey (termites) an experimental chamber. This showed strong preference for fruit, as 72% individuals ate it first 67% spent most time fruit-containing portion Five E. (13%) consumed termites, confirming this...
Larval erythraeid mites of the genus Leptus Latreille, 1796 are common ectoparasites terrestrial arthropods, including harvestmen (Order Opiliones). In this study, we investigated sexual, ontogenetic, and geographic variation in infestations Neotropical cosmetid Erginulus clavotibialis (Cambridge, 1904) by larval across multiple sampling locations Belize. We did not observe any significant differences prevalence or intensity mite infestation with respect to sex host between juveniles adults....
ABSTRACT Previous studies of leg injuries in harvestmen have focused on the fitness consequences for individuals that use autospasy (voluntary detachment leg) as a secondary defense mechanism. Leg damage among non‐autotomizing species laniatorean has not been investigated. Under laboratory conditions, we damaged femur IV Cynorta marginalis and observed with scanning electron microscopy (SEM) changes these wounds over ten days. We also used SEM to examine from three cosmetid were collected...
Abstract Fish body size can have important consequences for physiological factors, such as feeding, respiration, and nutrient excretion. Thus, the structure of a fish population greatly impact its role in lake cycles. We examined how shifts influenced phosphorus cycling by Gizzard Shad Dorosoma cepedianum Lake Dora, Florida, which underwent size‐selective harvest during 2005 2006. combined size‐structured stock assessment model with excretion prediction coefficients to determine biomass...
Harvestmen exhibit substantial responses to environmental conditions, disturbances, and modifications of their habitat. We examined the abundance species distribution harvestmen along an elevational gradient in Luquillo Experimental Forest (LEF) on Puerto Rico 6–12 weeks before 9–10 months after Hurricane Maria passed over island September, 2017. This provided a unique opportunity examine effects major storm litter-dwelling arthropod populations, as led much greater leaf litter downed...
Although fish removal for biomanipulation is often highly size-selective, our understanding of the nutrient cycling effects this size-selection poor. To better understand these effects, we measured excretion by gizzard shad (Dorosoma cepedianum) differing sizes from four central Florida (USA) lakes and combined measures with gillnet biomass size-structure data to compare lake-wide among years. Direct P in tissue ranged 0.16−1.00 kg·P·ha-1·yr-1. The estimated reduction due harvest 30.8−202.5...
The COVID-19 pandemic forced many institutions to adapt quickly and substitute technology-based online or remote instruction in place of in-person instruction. This adaptation caused faculty develop new technology fluencies, which can provide more flexibility innovation moving forward. However, the technological lessons learned from are somewhat conflicting, as we have also that there places where is extremely valuable. As move beyond protocols, important implications for universities...