Calibration of shell δ18O from the common whelk Buccinum undatum highlights potential for environmental reconstruction

first_imgThe common whelk, Buccinum undatum, is a commercially important gastropod found throughout the North Atlantic. One method of age and life history analysis for gastropod species is the use of oxygen isotope ratio (δ18O) measurements from their shells, which is a well-established technique for the reconstruction of historical seawater temperatures at the time of shell biomineralization. Palaeotemperature calibrations have been developed for different types of calcium carbonate as well as species-specific equations to produce the most accurate seawater temperature reconstructions. Here we investigate the four-layer internal structure of B. undatum shells and confirm an aragonite composition using Micro-Raman Spectroscopy (MRS). We then calibrate a species-specific palaeotemperature equation for this gastropod species. This was achieved through the isotopic analysis of shells from laboratory reared specimens of known provenance reared at specific seawater temperatures to produce the following: t(°C) = 14.96 (± 0.15) – 4.94 (± 0.22) x (δ18Oshell – δ18Owater) The calibrated equation differs significantly from previously published data derived from both aragonite and calcite. An offset of 1.04‰ (± 0.41‰) was discovered between observed δ18OShell values and those expected under equilibrium, suggesting a species-specific vital effect. The calibrated equation was used to reconstruct accurate, high resolution historical seawater temperatures from three sites across the U.K. (Shetland, the Menai Strait and Jersey). With this new accurate calibration, both modern and fossil B. undatum shells now have the potential to be employed as high-resolution archives of recent and historical seawater temperature.last_img read more

Sailors from USS New Mexico Participate in Navy Week Albuquerque

first_img View post tag: in Sailors from USS New Mexico Participate in Navy Week Albuquerque View post tag: News by topic View post tag: Mexico Back to overview,Home naval-today Sailors from USS New Mexico Participate in Navy Week Albuquerque October 5, 2011 View post tag: week View post tag: Navy View post tag: Naval Training & Educationcenter_img Share this article View post tag: Albuquerque View post tag: from View post tag: New View post tag: sailors View post tag: USS View post tag: participate Three USS New Mexico (SSN 779) Sailors are participating in Albuquerque Navy Week, Oct. 2-9.Albuquerque Navy Week 2011, in conjunction with Albuquerque International Balloon Fiesta, gives area residents an opportunity to meet Sailors and learn about the Navy’s critical missions and its broad range of capabilities.During Albuquerque Navy Week Sailors will meet with New Mexico Gov. Susana Martinez; visit BB-40 ship’s bell and museum; attend a Navy birthday ball hosted by the Navy League New Mexico Council; and a host of other events.“Opportunities like these do not occur very often,” said Master Chief Machinist’s Mate (SS) Joaquin R. Arroyo III, one of the three Sailors in attendance. “The three-member crew from USS New Mexico is excited to be included in the Navy Week events and look forward to meeting members of the local community.”Arroyo added that these events are great avenues to create awareness for the Virginia-class fast-attack submarine.“We feel this is an opportunity to not only provide the community of Albuquerque the chance to meet the Sailors of the USS New Mexico, but also provides us an opportunity for us to be an ambassador of the U.S. Navy and USS New Mexico.”Dick Brown, chairman, USS New Mexico Commissioning Committee said there is a unique relationship the boat shares with the committee.“While New Mexico doesn’t reside near an ocean, we are very much a Navy state with three submarines [honoring our state],” said Brown. “The Sailors’ visit is a tribute to all New Mexicans who have served, and are serving, in our Armed Forces.”Two other submarines are named after cities in New Mexico USS Albuquerque (SSN 706) and USS Santa Fe (SSN 763). The Commissioning Committee is in their 11th year of support for USS New Mexico, even though the boat was commissioned last year.“While construction of ‘our’ sub did not start until March 2004, our pursuit of the name New Mexico started in Jan 2000. We’ve been going strong ever since,” said Brown.The Navy conducts approximately 20 Navy Weeks each year. During a Navy Week celebration, the Navy concentrates a variety of outreach events in a metropolitan area for one week, to share the Navy story with as many people as possible.[mappress]Source: navy, October 05, 2011last_img read more


first_imgThe Evansville Otters have hired Bobby Segal as their new hitting coach.Segal, a former catcher at Indiana University, is in his first season as hitting coach for the Otters and second year in professional baseball.He and his family are ready for this opportunity in Evansville. “I would like to thank Andy McCauley and the Evansville Otters ownership for the chance to return to professional baseball in a community where the tradition is so rich.  My focus on the day-to-day process will give the loyal ownership and community something they will be proud of.  My family is excited to follow Andy’s winning brand of baseball and is grateful to become a part of Otter Ball,” said Segal.As a collegiate hitting coach over the last nine seasons, Segal has helped his teams to a 338-159 (.680) overall record and 142-60 (.703) league mark.  While making stops at Union College (2008-09), Butler University (2010), Iowa Western College (2011), Tarleton State University (2012) and Wabash Valley College (2013-16), his teams have earned six national rankings and made five appearances in national postseason tournaments.In his five summers as a manager and coach, Segal’s teams compiled a 215-125 (.632) overall record.  His clubs recorded three first-place finishes and two second-place efforts.  Segal managed in three All-Star Games and helped his teams to four playoff appearances.  His 2015 collegiate team, the Terre Haute Rex, captured a Prospect League championship.  His 2013 professional club, the Gary RailCats, won an American Association title.Segal was named 2015 Prospect League Manager of the Year after the Rex went 47-17 overall and captured the organization’s first league championship.  After beginning the season with a 14-1 record, the nation’s eighth-ranked team set a league record for regular-season wins (43).  While Segal served as the third base and hitting coach in Gary, the 2013 RailCats registered a 64-43 record on their way to a league title.Segal, a native of Indianapolis, has developed and guided 70 junior college student-athletes who have moved on to play at four-year institutions and 40 other players who have signed professional baseball contracts.A three-year letterwinner and Academic All-Big Ten selection at Indiana, Segal earned a bachelor’s degree in sport management from IU in May 2006 and master’s degree in health and physical education from Union in May 2009.  He and his wife, the former Rachel Harvey, live with their son, Asher, in Oakland City, Ind.The Otters open the 2016 season at home against the Schaumburg Boomers on Friday, May 13, at 6:35 p.m. Tickets are on sale now by calling (812) 435-8686. FacebookTwitterCopy LinkEmailSharelast_img read more

Infectious Diseases Expert Says COVID-19 Has Been Infecting Americans for Months

first_imgInfectious diseases expert Dr. Aileen Marty from FIU in Miami says that the novel coronavirus numbers in the U.S. are wrong today because the disease has been here infecting us for months. Therefore, she says the number of confirmed cases and deaths in America and are too low. CDC says events with 50 or more people should be cancelled or delayed for 8 weeks including sporting events, weddings, and festivals.Florida has 100 cases and 4 deaths. Broward has 30 confirmed COVID-19 cases, which is more than any other county.Infectious diseases expert Dr. Aileen marty on Broward’s response to COVID-19 a result, the National Guard has been deployed to Broward to test people for COVID-19 at free drive-thru clinics.West Palm Beach will open its first drive through coronavirus test sight today as well.Starting at 10 a.m., FoundCare, Inc.will open a drive-through testing station in the parking lot of its location at 2330 N.E. Congress Avenue in West Palm Beach.last_img read more