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  1. Sammler, Kate ; Peters, Kimberly (Ed.)
  2. Abstract

    Following the passage of a tropical cyclone (TC) the changes in temperature, salinity, nutrient concentration, water clarity, pigments and phytoplankton taxa were assessed at 42 stations from eight sites ranging from the open ocean, through the coastal zone and into estuaries. The impacts of the TC were estimated relative to the long-term average (LTA) conditions as well as before and after the TC. Over all sites the most consistent environmental impacts associated with TCs were an average 41% increase in turbidity, a 13% decline in salinity and a 2% decline in temperature relative to the LTA. In the open ocean, the nutrient concentrations, cyanobacteria and picoeukaryote abundances increased at depths between 100 and 150 m for up to 3 months following a TC. While at the riverine end of coastal estuaries, the predominate short-term response was a strong decline in salinity and phytoplankton suggesting these impacts were initially dominated by advection. The more intermediate coastal water-bodies generally experienced declines in salinity, significant reductions in water clarity, plus significant increases in nutrient concentrations and phytoplankton abundance. These intermediate waters typically developed dinoflagellate, diatom or cryptophyte blooms that elevated phytoplankton biomass for 1–3 months following a TC.

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  3. In this paper we explore the potential of academic podcasting to effect positive change within academia and between academia and society. Building on the concept of “epistemic living spaces,” we consider how podcasting can change how we evaluate what is legitimate knowledge and methods for knowledge production, who has access to what privileges and power, the nature of our connections within academia and with other partners, and how we experience the constraints and opportunities of space and time. We conclude by offering a guide for others who are looking to develop their own academic podcasting projects and discuss the potential for podcasting to be formalized as a mainstream academic output. To listen to an abridged and annotated version of this paper, visit: . 
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  4. Due to the increasing prevalence ofDinophysisspp. and their toxins on everyUScoast in recent years, the need to identify and monitor for problematicDinophysispopulations has become apparent. Here, we present morphological analyses, using light and scanning electron microscopy, andrDNAsequence analysis, using a ~2‐kb sequence of ribosomalITS1, 5.8S,ITS2, andLSU DNA, ofDinophysiscollected in mid‐Atlantic estuarine and coastal waters from Virginia to New Jersey to better characterize local populations. In addition, we analyzed for diarrhetic shellfish poisoning (DSP) toxins in water and shellfish samples collected during blooms using liquid‐chromatography tandem mass spectrometry and an in vitro protein phosphatase inhibition assay and compared this data to a toxin profile generated from a mid‐AtlanticDinophysisculture. Three distinct morphospecies were documented in mid‐Atlantic surface waters:D. acuminata,D. norvegica, and a “smallDinophysissp.” that was morphologically distinct based on multivariate analysis of morphometric data but was genetically consistent withD. acuminata. While mid‐AtlanticD. acuminatacould not be distinguished from the other species in theD. acuminata‐complex (D. ovumfrom the Gulf of Mexico andD. sacculusfrom the western Mediterranean Sea) using the molecular markers chosen, it could be distinguished based on morphometrics. Okadaic acid, dinophysistoxin 1, and pectenotoxin 2 were found in filtered water and shellfish samples duringDinophysisblooms in the mid‐Atlantic region,as well as in a locally isolatedD. acuminataculture. However,DSPtoxins exceeded regulatory guidance concentrations only a few times during the study period and only in noncommercial shellfish samples.

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