Chemical limnology in coastal East Antarctic lakes: monitoringfuture climate change in centres of endemism and biodiversity

first_imgPolar lakes respond quickly to climate-induced environmental changes. We studied the chemicallimnological variability in 127 lakes and ponds from eight ice-free regions along the East Antarcticcoastline, and compared repeat specific conductance measurements from lakes in the Larsemann Hills andSkarvsnes covering the periods 1987–2009 and 1997–2008, respectively. Specific conductance, theconcentration of the major ions, pH and the concentration of the major nutrients underlie the variation inlimnology between and within the regions. This limnological variability is probably related to differences inthe time of deglaciation, lake origin and evolution, geology and geomorphology of the lake basins and theircatchment areas, sub-regional climate patterns, the distance of the lakes and the lake districts to the icesheet and the Southern Ocean, and the presence of particular biota in the lakes and their catchment areas. Inregions where repeat surveys were available, inter-annual and inter-decadal variability in specificconductance was relatively large and most pronounced in the non-dilute lakes with a low lake depth tosurface area ratio. We conclude that long-term specific conductance measurements in these lakes arecomplementary to snow accumulation data from ice cores, inexpensive, easy to obtain, and should thus bepart of long-term limnological and biological monitoring programmes.last_img read more

Wind-driven upwelling around grounded tabular icebergs

first_imgTemperature and salinity data collected around grounded tabular icebergs in Baffin Bay in 2011, 2012, and 2013 indicate wind-induced upwelling at certain locations around the icebergs. These data suggest that along one side of the iceberg, wind forcing leads to Ekman transport away from the iceberg, which causes upwelling of the cool saline water from below. The upwelling water mixes with the water above the thermocline, causing the mixed layer to become cooler and more saline. Along the opposite side of the iceberg, the surface Ekman transport moves towards the iceberg, which causes a sharpening of the thermocline as warm fresh water is trapped near the surface. This results in higher mixed layer temperatures and lower mixed layer salinities on this side of the iceberg. Based on these in situ measurements, we hypothesize that the asymmetries in water properties around the iceberg, caused by the opposing effects of upwelling and sharpening of the thermocline, lead to differential deterioration around the iceberg. Analysis of satellite imagery around iceberg PII-B-1 reveals differential decay around the iceberg, in agreement with this mechanism.last_img read more

Do krill fisheries compete with macaroni penguins? Spatial overlap in prey consumption and catches during winter

first_imgAim To infer the potential for competition between an important Antarctic predator, the macaroni penguin, and the krill fishery by examining the spatial overlap in prey consumption and catches. Location Scotia Sea and adjacent waters. Methods The study focused on the winter period as this is the only time of the year when spatio-temporal overlaps between macaroni penguin foraging and the krill fishery can occur. We tracked adult macaroni penguins from a colony in South Georgia using global location sensors to determine winter distribution, and bioenergetics models to calculate the biomass of food consumed during the winter period. We combined these to produce a surface of the tonnes of krill consumed, which could be compared directly with the spatial distribution of the tonnes of krill caught by the fishery. Results Adult macaroni penguins from South Georgia consumed 135,826 tonnes of krill (95% CIs: 83,446–188,140) during the winter, which is similar to the 98,431 tonnes caught by fisheries over the same period. However, macaroni penguins had a very wide pelagic distribution across the Scotia Sea, whereas the fishery was restricted to three small areas on shelf edges, such that their spatial overlap was negligible. The proportion of the estimated krill stock taken by macaroni penguins and the krill fishery was small at both the scale of the Scotia Sea and the local areas within which the fisheries operate. Main conclusions Competition between macaroni penguins and the krill fishery is low under current management and far less than that among the various species of krill predators that occur in the Scotia Sea. Our method will allow quantification of changes in competition between macaroni penguins and krill fisheries should the latter expand in the future, and provides a framework for assessing predator-fishery competition in other systems.last_img read more

Freshman Davis leads Weber State past N. Colorado 45-28

first_img Associated Press FacebookTwitterLinkedInEmailOGDEN, Utah (AP) — Freshman Josh Davis ran for 218 yards and two touchdowns, including a 95-yard gallop in the first quarter, and Weber State breezed to a 45-28 victory over Northern Colorado in Big Sky Conference action on Saturday night.Jake Constantine had 168 yards passing and two TDs and freshman backup Kaden Jenks connected for his first career passing TD on his only attempt of the game as the Wildcats (3-1, 2-0) amassed 410 yards of offense.Keaton Mott threw for 262 yards and three TDs for the Bears (0-4, 0-2), who hung with the FCS-ranked Wildcats in the first half. Mott had a 22-yard scoring strike to Theron Verna and a 42-yard TD toss to Alex Wesley in the final 6:43 of the second quarter to help the Bears forge a 21-all tie at halftime.Rashid Shaheed ignited Weber State when he took the kickoff to start the third quarter and raced 100 yards for a TD to make it 35-21. Mott’s 1-yard TD pass to Michael McCauley pulled Northern Colorado within seven, but the Wildcats’ defense stiffened in the fourth quarter to preserve the win. Written by Tags: Big Sky/Football/Josh Davis/Weber State Wildcats September 22, 2018 /Sports News – Local Freshman Davis leads Weber State past N. Colorado 45-28last_img read more

No. 14 Utah State Football Back in Action Saturday Against San Jose State

first_img Written by Tags: Big Ten/Cade Hall/Josh Love/Josh Oliver/Maverik Stadium/Michigan Wolverines/San Jose State/Senior Day/The Associated Press/Tyler Nevens/Utah State Football FacebookTwitterLinkedInEmailLOGAN, Utah-After a 56-17 dismantling of Hawaii in the late window last Saturday evening, No. 14 Utah State football returns to action Saturday at home against San Jose State.The Aggies’ rivalry with the Spartans dates back to 1940 with San Jose State leading the all-time series 20-17-1.However, Utah State has won the last seven games in this series and the last three at home.The Aggies have achieved their highest ranking in The Associated Press poll since 1961 when that Utah State squad finished ranked 10th.When ranked by The Associated Press, Utah State is currently 5-1 in its history, including last week’s win at Hawaii.The prolific Aggies’ offense has amassed 58 touchdowns already on the season and with three more touchdowns will eclipse the school record of 60 set in 2011.Furthermore, Utah State has scored 451 points on the season, just short of the record 454 points scored in 2012.The Aggies, who are 5-0 at Maverik Stadium this season, will honor 25 seniors Saturday afternoon.At home this season, the Aggies have scored at least 40 points in all five games and have won by an average of 38.2 points.Utah State is in the midst of an 8-game winning streak and in that span they have amassed 52.5 points a game and 503.4 yards per contest.The Aggies’ 8-game winning streak is the fifth-longest in FBS college football as they are tied with the Michigan Wolverines of the Big Ten Conference for that distinction.San Jose State is in the midst of a highly unsuccessful season as they come into Logan Saturday at 1-8 and 1-4 in conference play.The Spartans’ offense is led by quarterback Josh Love (1,753 passing yards, 13 TD’s/7 INT’s) tailback Tyler Nevens (108 car, 428 yards, 4 TD’s) and receiver Josh Oliver (49 rec, 580 yards, 3 TD’s).Defensive lineman Cade Hall leads the Spartans with three sacks on the season. November 6, 2018 /Sports News – Local No. 14 Utah State Football Back in Action Saturday Against San Jose State Brad Jameslast_img read more

Scoreboard roundup — 1/7/19

first_img Written by FacebookTwitterLinkedInEmailiStock(NEW YORK) — Here are the scores from Monday’s sports events:COLLEGE FOOTBALL PLAYOFF NATIONAL CHAMPIONSHIP(2) Clemson 44, (1) Alabama 16NATIONAL BASKETBALL ASSOCIATIONSan Antonio 119, Detroit 107Boston 116, Brooklyn 95New Orleans 114, Memphis 95Milwaukee 114, Utah 102Houston 125, Denver 113L.A. Lakers 107, Dallas 97Portland 111, NY Knicks 101Sacramento 111, Orlando 95NATIONAL HOCKEY LEAGUENashville 4, Toronto 0St. Louis 3, Philadelphia 0Minnesota 1, Montreal 0Calgary 4, Chicago 3San Jose 3, L.A. Kings 1Copyright © 2019, ABC Radio. All rights reserved. Beau Lundcenter_img January 8, 2019 /Sports News – National Scoreboard roundup — 1/7/19last_img read more

Manny Machado jerseys briefly appear at Padres’ team store

first_img FacebookTwitterLinkedInEmailScott Clarke / ESPN Images(SAN DIEGO) — Manny Machado’s contract with the San Diego Padres isn’t yet a done deal but on Wednesday, jerseys bearing his last name and No. 13 made an appearance at Petco Park.The San Diego Union-Tribune reports the replica jerseys were seen for sale at the team store at Petco Park. However, once the Padres were notified, they were pulled off the sales floor.The newspaper said it is not known if any of the jerseys were sold before they were taken off the racks.Machado, 26, reached an agreement with the Padres on a 10-year, $300 million contract. The deal is pending the results of two physicals.The shortstop was in San Diego Wednesday to take his physical for the team. He is scheduled to take his second physical on Thursday, this time for the company that will insure the Padres on the 10-year deal, ESPN reports.Copyright © 2019, ABC Radio. All rights reserved. February 21, 2019 /Sports News – National Manny Machado jerseys briefly appear at Padres’ team store Written bycenter_img Beau Lundlast_img read more

Bees Swept In Doubleheader

first_imgThey’ll seek revenge today against Fresno in the series finale. FacebookTwitterLinkedInEmail (Salt Lake City, UT)  —  The Salt Lake Bees are on a six-game losing streak after being swept in a doubleheader against Fresno at Smith’s Ballpark.  Tags: PCL/Salt Lake Bees Robert Lovell Written by April 11, 2019 /Sports News – Local Bees Swept In Doubleheader The Bees played two games on Wednesday after getting rained out on Tuesday.  They lost both by scores of 2-0 and 8-1.  last_img read more

Bubba Wallace ‘really proud’ of NASCAR’s ban on Confederate flags

first_img Written by June 11, 2020 /Sports News – National Bubba Wallace ‘really proud’ of NASCAR’s ban on Confederate flags FacebookTwitterLinkedInEmailABC NewsBy KELLY MCCARTHY and MORGAN WINSOR, ABC News(NEW YORK) — American race car driver Darrell “Bubba” Wallace Jr. said he’s “really proud” of NASCAR for “stepping up” and banning the Confederate flag from all its events. “I think this is the most crucial time,” Wallace, 26, said in an interview on ABC News’ Good Morning America Thursday. “Time is of the essence right now in the world that we’re in, in the nation that we’re in, to create change and create unity and come together and really try to be more inclusive.” Wallace, the only black driver in the Cup Series, NASCAR’s highest level, has been outspoken on racial issues in the sport and said he feels “very gracious” to have the support of fellow drivers who “are willing to stand up for what’s right.”NASCAR announced the ban on Wednesday night, just one day after Wallace called for action from the racing league to officially remove the Confederate flag, which has a long history of being flown at races on camper trailers, RVs, coolers and even seen on hats of fans since the sport’s inception.“That’s a symbol of hate and it brings back so many bad memories,” Wallace said. “There’s no good that comes with that flag, and that’s the message we’re trying to get across.”The move comes amid nationwide protests against racism and police brutality in the wake of the death of George Floyd, a 46-year-old unarmed black man who died in Minneapolis police custody on May 25.Wallace wore a “Black Lives Matter” shirt and his No. 43 car was emblazoned with a #BlackLivesMatter hashtag at Wednesday night’s race at Martinsville Speedway in Ridgeway, Virginia. “Last night was really special,” he said. “I sincerely thought that was the biggest race of my career just with everything going on in the world and how we were standing up.”The flag, also known as “stars and bars,” was used by the Confederacy after seceding from the Union in 1861 — prompting the American Civil War — in a bid to uphold slavery. Most arguments defending the flag, whether it be at sporting events or in state Capitols, have centered on it being about Southern pride and heritage as opposed to its Civil War ancestry. NASCAR and all of its teams are headquartered in North Carolina. While the sport has spread to race tracks across the country, it has always held close ties to the South. Some NASCAR fans have taken to social media to voice their anger over the ban, saying they will no longer attend races. Wallace said his message to them is: “It’s not about you.” “This is about our brothers and sisters that are suffering,” he added. “It’s about a group of people that we are trying to bring together and make this world a better place for.”Copyright © 2020, ABC Audio. All rights reserved.center_img Beau Lundlast_img read more

Britt Reid, Chiefs assistant coach and son of Andy Reid, involved in crash that seriously injured child

first_img Written by FacebookTwitterLinkedInEmailkali9/iStockBy MARK OSBORNE, ABC News(KANSAS CITY, Mo.) — Britt Reid, an assistant coach for the Kansas City Chiefs and the son of head coach Andy Reid, was involved in a serious crash Thursday night, according to police. Reid is being investigated for “impairment,” Kansas City police said.Reid suffered non-life-threatening injuries, but two children in a car involved in the crash were seriously injured, including one with life-threatening injuries.The 35-year-old is a linebackers coach for the Chiefs, who will play in the Super Bowl this Sunday against the Tampa Bay Buccaneers.“The organization has been made aware of a multi-vehicle accident involving Outside Linebackers Coach, Britt Reid,” the Chiefs said in a statement. “We are in the process of gathering information, and we will have no further comment at this time. Our thoughts and prayers are with everyone involved.”The accident took place Thursday night at about 9 p.m. near the Chiefs’ practice facility at the Truman Sports Complex, according to police.Reid hit a car that was assisting another that had run out of gas on the side of the road, causing a chain reaction that hit the stalled vehicle, according to police. A 5-year-old in the broken down car suffered life-threatening injuries, while a 4-year-old in the car suffered non-life-threatening injuries, police said.The driver of the car Reid hit initially and two adults in the car that ran out of gas were not injured.Kansas City NBC affiliate KSHB, which obtained a search warrant related to the case, reported Reid admitted to drinking before the crash.The Chiefs are not traveling to Tampa, the host city for Super Bowl 55, until Saturday. The team was remaining in Kansas City due to COVID-19 protocols.Reid has worked alongside his father, who has coached in the NFL since 1992 and taken the Eagles and Chiefs to the Super Bowl, since 2013. Andy Reid won his first title with Kansas City last year.Britt Reid pleaded guilty to flashing a gun at another driver in a road rage incident in 2007 and served prison time. While in prison, he also pleaded guilty to a charge of driving under the influence from a separate incident.ABC News’ Nick Cirone and Matt Foster contributed to this report.Copyright © 2021, ABC Audio. All rights reserved. February 5, 2021 /Sports News – National Britt Reid, Chiefs assistant coach and son of Andy Reid, involved in crash that seriously injured childcenter_img Beau Lundlast_img read more