A5103158521- Geology and Paleoclimatology Research
- Marine Ecology and Invasive Species
- Marine Biology and Ecology Research
- Marine Biology and Environmental Chemistry
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Marine and coastal plant biology
- Karst Systems and Hydrogeology
- Tropical and Extratropical Cyclones Research
- Marine and fisheries research
- Aeolian processes and effects
- Ichthyology and Marine Biology
- Marine Invertebrate Physiology and Ecology
- Coastal and Marine Dynamics
- Methane Hydrates and Related Phenomena
- Turtle Biology and Conservation
- Geological and Geophysical Studies Worldwide
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Crustacean biology and ecology
- Evolution and Paleontology Studies
- Environmental DNA in Biodiversity Studies
- Coastal wetland ecosystem dynamics
- Marine Sponges and Natural Products
- Marine Bivalve and Aquaculture Studies
Framingham State University
2012-2023
University of Alabama
2007-2021
Geological Survey of Alabama
2009-2020
University of St Andrews
1994-2003
Wabash College
1998
University of New Hampshire
1991-1992
Introduced species are common members of estuarine communities where their role as competitors and predators is concern, This paper examines the invasion Gulf Maine benthic habitats by ecologically similar alien invertebrates Styela clava, Botrylloides diegensis , Membranipora membranacea . clava increased slowly in abundance at study sites Beverly, Massachusetts Portsmouth, New Hampshire. We found no evidence competitive dominance S. even though it dominant elsewhere. rapidly became a after...
Abstract Crassostrea virginica is one of the most common estuarine bivalves in United States’ east coast and frequently found archaeological sites sub-fossil deposits. Although there have been several sclerochronological studies on stable carbon oxygen isotopes shells this species, less known about δ 15 N values within their shells, which could be a useful paleoenvironmental proxy to assess nitrogen dynamics. Modern C. samples were collected Chesapeake Bay for comparison with from nearby...
Larval metamorphosis of the dorid nudibranch Adalaria proxima is induced by a water-borne cue present in seawater that has been conditioned with live Electra pilosa, its preferred bryozoan prey. Extracts and fractions Electra-conditioned (CSW) were assessed bioassays competent larvae to further elucidate nature inductive chemical cue. volatile compounds lipids CSW did not induce metamorphosis; remaining after extraction still retained inducer. Heating 80? C for 5 min eliminate cue, but...
The prevalence of parasite infections in Littorina littorea (Common Periwinkle) was examined at 16 rocky intertidal sites along the New Hampshire coastline over three summers (2006 to 2008). We sampled a relatively small spatial scale (21 km) and expected that L. would be similar between this sampling area. In total, 1983 snails were collected from areas mean low water during spring tides. Snail size (mm), gender, type parasitic infection noted for all snails. Eleven percent infected with...
The invasion of the bryozoan Membranipora membranacea to Gulf Maine in 1987 eventually provided an additional prey resource dorid nudibranch Onchidoris muricata (Müller, 1776). impact this novel on population and reproductive biology O. was investigated at intertidal site southern from January 2005 October 2009. Nudibranchs were found associated with a variety bryozoans, seasonal shift Electra pilosa (December May) M. (June November). Juveniles (< 3 mm) all months except May, June, July...
Abstract Radiocarbon assays of sediments from Lake Shelby, US Gulf Coast, exhibit substantial 14 C deficiencies 9.3% and 4.7% for the limnic sapropel associated fresh-water clams Rangia cuneata , respectively. Measured radiocarbon dates require corrections 785 ± 80 365 90 yr (1 σ ), respectively, in order to achieve consistency with time scale. Coast serve as unique repositories pre-historic hurricane strikes. Previously unrecognized likely render compromised chronologies paleo-hurricane...
The feeding biologies and habitats of four nudibranchs in colonies the hydroid Obelia geniculata were investigated to determine whether these factors contribute coexistence nudibranchs. radulae behaviors showed species-specific traits. Dendronotus frondosus has a multi-seriate radula; when small (<5 mm), individuals are suctorial feeders, whereas larger (>5 bite whole polyps. Doto coronata uses flat, uniseriate radula penetrate stolons. Eubranchus exiguus penetrates hydrothecae with...
Invasion of the bryozoan Membranipora membranacea to Gulf Maine provided an additional prey resource dorid nudibranch Onchidoris muricata (Müller, 1776). We examined choice based on past diet history and compared growth reproductive output among laboratory-reared O. exclusive diets M. native, historically preferred prey, Electra pilosa. Adult nudibranchs were collected from Cape Neddick, York, for experiment post-metamorphic juveniles Jaffery Point, Newcastle, New Hampshire reproduction...
Abstract Coastal and estuarine ecosystems exhibit extreme fluctuations in abiotic factors that influence the success distribution of many introduced marine invertebrates. The frequency these may worsen under scenario climate change due to more intense storm events or greater precipitation. While studies have focused on response adult ascidians salinity, few examined larvae low salinity post‐metamorphic asexual reproduction after larval exposure salinity. Here we tested effect metamorphosis...
Recruitment and temporal variation in abundance of co-occurring species provide a non-equilibrial mechanism allowing their coexistence. Kelp blades (Laminaria spp.) with colonies the hydroid Obelia geniculata (L.) were collected over 28-month period from subtidal study site southern Gulf Maine (USA). Temporal size frequency distributions nudibranchs (Dendronotus frondosus (Ascanius), Doto coronata (Gmelin), Eubranchus exiguus (Alder & Hancock) Tergipes tergipes (Forskål)) coexisting on...