Investment in sexual reproduction by Antarctic mosses

first_imgWe propose four measures of allocation to sexual reproduction in mosses, and apply these to data obtained from 15 species found fruiting on Signy Island, South Orkney Islands, in the maritime Antarctic. Spore counts and size measurements are reported for each species. Larger spore sizes in most short-lived species suggest that spores may have an important role in local colonisation. Five species with small spore dimensions, high counts and wide Antarctic distributions are identified as potential long-distance colonists. Investment in sexual reproduction is estimated using two measures (the ratio of sporophyte to gametophyte dry weight, and the investment in spores as a proportion of total shoot dry weight). Both measures show that investment by annual and short-lived species is greater than that found in most perennial species. The same short-lived species also show a much stronger relationship between the sporophyte and gametophyte dry weights of individual shoots in regression analyses. The short-lived species examined in this study may be classified as annual or short-lived shuttle species (sensu During). Their reproductive behaviour largely agrees with the predictions of life history models, and they may be described as ruderal (sensu Grime) or r-selected. However, their production of relatively few large spores is at variance with the predictions of these models. The sexual behaviour of longer-lived species agrees less well with theoretical predictions, with some showing surprisingly large levels of investment, although others can be described as a-selected (sensu Greenslade) or stress tolerators (sensu Grime), with much lower investment in sexual reproduction.last_img read more

Gears of War: Judgment Midnight Launch Party – March 18

first_imgSign up for our COVID-19 newsletter to stay up-to-date on the latest coronavirus news throughout New York On Monday, March 18 starting at 10 p.m., Microsoft at Walt Whitman Shops, will host a midnight launch party for Gears of War: Judgment where fans can compete for fun and bragging rights.Customers will enjoy food, drinks and prizes. Currently, customers can pre-order the game anytime and at any Microsoft retail store.They can pick up their own copy of Gears of War: Judgment at 12:01 a.m. on Tuesday, March 19 to continue the battle at home. The first 50 people in line will receive a special giveaway. Check out the Microsoft retail store Facebook for more information.last_img read more

Jakarta to evaluate COVID-19 policy amid ‘alarming’ situation

first_imgBoth figures far exceed the World Health Organization’s standard of 5 percent for the relaxation of restrictions. Cumulatively, the positivity rate over the course of the pandemic was 6.9 percent in Jakarta and 13.9 percent nationally, Anies added.The governor said the condition was “worrying” because of Jakarta’s healthcare limitations.“If the number of people requiring treatment is more than the capacity of the hospitals and the number of medical personnel, we will face a big problem,” he said. The Jakarta administration is set to hold a special meeting on Wednesday to assess its COVID-19 countermeasures as cases in the capital continue to rise.“The task force will hold a special meeting to evaluate the latest developments of COVID-19 in Jakarta because the situation is alarming,” Governor Anies Baswesdan said on Wednesday.In the past week, Anies said, Jakarta’s positivity rate – the percentage of COVID-19 tests that return a positive result – had increased to 13.2 percent, while the national rate had reached 18.4 percent. Read also: Industrial COVID-19 clusters in Bekasi, Karawang reach 500 casesAnies said the Jakarta administration would prepare new policies and expected better enforcement of health protocols in communities.Jakarta is currently under transitional large-scale social restrictions (PSBB), a relaxation of the previously imposed restrictions, as the capital gradually reopens businesses and services to keep the economy running.The capital entered transitional PSBB on June 4 and has since extended the policy five times. The move, however, seems to have backfired as new coronavirus clusters have emerged in the capital.As of Tuesday afternoon, Jakarta had confirmed 48,811 COVID-19 cases, with 1,330 fatalities and 36,451 recoveries.Amid the rising rate of transmission, gravediggers have raised concerns about seemingly endless work with minimum protective gear. The available land in designated COVID-19 cemeteries is decreasing.“Currently, we have designated cemeteries in Tegal Alur and Pondok Ranggon. In Tegal Alur, there are still about two hectares of land available, with one hectare accommodating roughly 3,000 burials,” Anies said.The management of Pondok Ranggon cemetery previously reported that by the end of August, there would only be space for another 1,100 burials. Space is expected to run out in October.Topics :last_img read more

Chiefs : Frenzy surrounds Harper as he begins stint in Syracuse

first_img Published on April 8, 2012 at 12:00 pm When Bryce Harper finally took the field on opening day last Thursday, the Syracuse Chiefs’ fans’ excitement immediately boiled over.Despite bitter conditions – with the temperature dropping below 40 degrees – hundreds of fans pressed against the wall along the third-base line to try and obtain an autograph from the 19-year-old prodigy.As Syracuse’s opponent, the Rochester Red Wings, emerged from the dugout during the announcement of its opening day lineup, Harper, baseball’s top prospect, reached out and signed baseballs, bats and other pieces of memorabilia.‘Getting out there on opening day, it’s always fun,’ Harper said. ‘You get that nervous feeling, the butterflies and what not, but after the first pitch is thrown, all that goes out the door.’After struggling in the spring, striking out 11 times in 28 at-bats, the stud outfielder was optioned to Triple-A Syracuse to begin the 2012 season. It didn’t take long for Harper to hit his stride in his first game in Syracuse. Harper finished 2-for-4 at the plate with a double, single and strikeout, one of the lone sources of offense for the Chiefs in their 7-4 opening-day loss to Rochester – the Triple-A affiliate of the Minnesota Twins – in front of 6,178 fans at Alliance Bank Stadium on Thursday.AdvertisementThis is placeholder textThrough Syracuse’s first four games this season, Harper is batting .267 with three singles, one double and three strikeouts.‘I think the best thing was me getting sent down to Triple-A and really getting on that grind every day, working in the cage and getting my routine back,’ Harper said after the season opener Thursday.On opening day against the Red Wings, Syracuse had just two hits through six innings and both belonged to Harper. The Chiefs fell behind by seven runs in the top of the seventh inning and were unable to make a comeback.Harper, donning a black ski mask to brave the frigid temperatures, batted fifth and showed immediate maturity at the plate during his first plate appearance. He battled back from a 0-2 count against P.J. Walters before knocking the seventh pitch of the at-bat down the right field line for a double and his first hit at the Triple-A level.Harper added a one-out single and a stolen base in the fourth inning, but the next two Chiefs batters were sent down in order, stranding him in scoring position.‘I’m sure he was nervous like everyone else in his first experience in Triple-A, and I thought his first ‘AB’ he battled, they pitched him tough, they pitched him inside,’ Chiefs manager Tony Beasley said. ‘He did a nice job staying in there and competing and got his first double, and then his next AB he got a base hit as well.’Harper had a chance to spark a rally in the sixth inning, coming to the plate with a runner on first. But Red Wings manager Gene Glynn gave Harper the ultimate sign of respect by signaling to the bullpen to bring in left-handed pitcher Tyler Robertson to face the lefty Harper. Robertson fooled Harper with an off-speed pitch in a 1-2 count, and he went down swinging.Harper ended the afternoon with the only multi-hit game for the Chiefs, putting together a solid performance in his first action of the season.Chiefs first basemen Tyler Moore and Harper made the transition together to play with Syracuse in Triple-A this season. Moore, batting cleanup in front of Harper, has faltered early in the season, including a performance where he stranded six runners on base during the Chiefs 3-1 loss to Rochester on Friday.Moore said he feels partially responsible for not giving Harper enough opportunities with runners on base. Harper has not driven in a run through four games. But Moore expects to get more comfortable at the plate as the season progresses.The duo’s respect for each other could translate to a formidable one-two punch in the heart of the lineup.‘It grows every day,’ Moore said. ‘We respect each other and just we’re teammates. We’re going to do whatever it takes to help one another out and that’s about it.’Harper’s skill sets will likely land him with a starting role with the Nationals in the future. He has saddled with the expectation to be one of the best players in baseball.But he’s enjoying his time with the Chiefs to begin the 2012 season.‘It’s a blessing being out there every single day,’ Harper said. ‘I love being out there, and it’s a blessing to be in Triple-A and to be out there with the guys I’m with. I just try to live for today and just play for today and not worry about two weeks or a week or tomorrow.’[email protected] Commentscenter_img Facebook Twitter Google+last_img read more