Camellias and the weevils that attack their seeds seem locked in conflict. The thicker a camellia grows its protective woody covering around its seeds, the longer the feeding tube on some weevil to break through and devour. John R. Thompson talked about such “coevolutionary arms races” in Current Biology1 and asked whether such wars can go on forever, leading to increased exaggeration of traits. The answer is, apparently, there are limits. Traits vary in a mosaic pattern across populations. Not all camellias are infested by beetles with the longest boring tools. As with any war, there are hotspots and coldspots. The dynamics of arms races seem to buffer both species against extremes.Collectively, these studies suggest that coevolution is a pervasive process that continually reshapes interspecific interactions across broad geographic areas. And that has important implications for our understanding of the role of coevolution in fields ranging from epidemiology to conservation biology. Many diseases, for example malaria, vary geographically both in parasite virulence and host resistance, potentially creating regions of coevolutionary hotspots and coldspots. The spread of introduced species seems be creating new geographic mosaics of coevolution as some species become invasive and coevolve with native species in different ways in different regions or drive rapid evolution in native species, sometimes in less than a hundred years or so. The results for Japanese camellia and camellia weevils reinforce the developing view that interactions coevolve as a geographic mosaic across landscapes, and it is often difficult for one partner to get ahead of the other (or others) everywhere. (Emphasis added.)1John R. Thompson, “Coevolution: The Geographic Mosaic of Coevolutionary Arms Races,” Current Biology, Volume 15, Issue 24, 24 December 2005, pages R992-R994, doi:10.1016/j.cub.2005.11.046.This appears to provide more slippage on the evolutionary treadmill (see 03/17/2003 entry). Though the word “evolution” is involved, don’t be confused; this has nothing to do with macroevolution, like bacteria evolving into people. Coevolution leads to exaggerated traits between two interacting species, like the beaks of hummingbirds and the flowers they pollinate. As with all other observed forms of microevolution, including Darwin’s famous finches, it involves the modification of existing traits – not the origin of new ones. Notice how quickly changes can result; Thompson referred to rapid “evolution” in native species in less than 100 years after an intruder was introduced. Young-earth creationists could use such concepts to explain the rapid diversification of varieties and species within created kinds, and there would be nothing Thompson or the Darwinists could do to prove them wrong. Studies like this do not establish that coevolution can be extrapolated endlessly into macroevolution. In fact, the quote above seems to indicate otherwise: there are limits to the amount of change in the “coevolutionary arms race.” World War II did not produce Superman. (Visited 65 times, 1 visits today)FacebookTwitterPinterestSave分享0
Share Facebook Twitter Google + LinkedIn Pinterest We’re at least two weeks away yet for harvesting anything unless it gets hot again.The tile lines are dry and in between the plants are stunted and green. There are some fields in the area that are pretty even that may come off this week. I know I do not have any ready yet.I checked some corn and the moisture is anywhere from 26% to 27% on the tile line. Then in between the plants are green and little and I don’t know what we are going to do. It will be interesting. I have hydraulic deck plates but we may have to run all of the tile lines first and readjust. There will be some different shenanigans going on to get ready for this harvest.We are finishing our last ditching job. We are done with tile until beans and corn are off and then we have another 140 acres to do this fall.We got nine-tenths to an inch with this last rain. The town of Delphos got 6 to 7.5 inches of rain and were flooded out again. Hancock County didn’t get too much. The rain had to help some of the beans.The cover crops are coming up. I have some rye to plant this week. With the manure I thought it might get too tall this winter so I wanted to wait a bit to plant that.I think harvest could go fast once it get started because only half the trucks will be going up and down the road, but then we have all of these green plants still out there. I don’t know what to expect.
The Deccan Chargers have lost their place as an Indian Premier League franchise after it failed to meet an extended deadline to furnish a Rs.100 crore bank guarantee.The beleaguered owners of Deccan Chargers failed to produce the bank guarantee before the Bombay High Court, a condition that had been set for the struggling team’s survival in the league.Claim to fameThe Hyderabad-based company has won the second season of the IPL in 2009 held in South Africa under the captainship of Adam Gilchrist. Media group Deccan Chronicle Holdings Ltd had bought the franchise for an amount of USD 107 million on 24 January 2008.Why in newsReports quoting sources say banks and financial institutions that have lent money to Deccan Chronicle Holdings are being investigated for alleged irregularities in their dealings with the Hyderabad-based media house.The finance ministry has asked a two-member panel to conduct the probe, which is expected to take two months. A Mumbai based real estate company, Kamla Landmarc has bought the Deccan Chargers IPL franchise. Owned by Mr Ramesh Jain, the company undertakes construction of residential/commercial projects.
Alex Cabagnot lifts San Miguel Beer Panelo: Duterte ‘angry’ with SEA Games hosting hassles Philippine Arena Interchange inaugurated LATEST STORIES DA eyes importing ‘galunggong’ anew Photo by Tristan Tamayo/INQUIRER.netLa Salle clinched a Final Four slot in UAAP Season 81’s women’s volleyball competitions Saturday—but that wasn’t what the green-clad half of a 16,000-strong crowd came to see.After all, there was hardly any doubt that the defending champions Lady Spikers would make the semifinals, most probably armed with the twice-to-beat incentive.ADVERTISEMENT Trending Articles PLAY LIST 00:50Trending Articles00:50Trending Articles02:46Makabayan bloc: Duterte suspension order on rice importation only a ‘media stunt’02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City01:07Trump talks impeachment while meeting NCAA athletes02:49World-class track facilities installed at NCC for SEA Games02:11Trump awards medals to Jon Voight, Alison Krauss SEA Games hosting troubles anger Duterte “I tried to play with pride and make a difference for the team,” said the 19-year-old Dela Cruz in Filipino.“We played well because we really needed this win to pull ahead of the other teams under us,” added De Jesus.At second place with a 9-3 card, La Salle’s chasers for a twice-to-beat advantage include University of Santo Tomas and Far Eastern University, who play each other on Sunday.Ateneo slipped to 10-2, but still leads the hunt for one of two twice-to-beat slots, needing to win at least one of its two remaining matches (against eliminated teams Adamson and University of the East) to clinch the semifinal benefit.Earlier, University of the East fashioned out a 25-14, 25-19, 25-22, victory over Adamson for its best finish in seven seasons.Sports Related Videospowered by AdSparcRead Next MOST READ Cayetano: Senate, Drilon to be blamed for SEA Games mess Don’t miss out on the latest news and information. Private companies step in to help SEA Games hosting So the plot really revolved around one question: Late into a season marked by some missteps, how good is La Salle right now?Very good, it turns out.FEATURED STORIESSPORTSPrivate companies step in to help SEA Games hostingSPORTSPalace wants Cayetano’s PHISGOC Foundation probed over corruption chargesSPORTSSingapore latest to raise issue on SEA Games food, logisticsThe Lady Spikers humbled fierce rival Ateneo in dominating fashion, never allowing the No. 1 Lady Eagles to get going in a 25-17, 25-13, 25-23 triumph at Smart Araneta Coliseum.“I didn’t expect to win this quick, but my players played very well and maybe they wanted it more,” said La Salle mentor Ramil de Jesus in Filipino. Hontiveros presses for security audit of national power grid Ethel Booba twits Mocha over 2 toilets in one cubicle at SEA Games venue La Salle thus completed a 2-0 elimination round sweep of Ateneo, pushing itself closer to a twice-to-beat incentive in the semifinals. The Lady Spikers’ fourth straight victory also ended the Lady Eagles’ 10-game run.Perhaps even more chilling was the way La Salle manhandled Ateneo.The Lady Eagles, the best blocking team in the league whose players—Maddie Madayag, Bea De Leon and Kat Tolentino—occupy the top three spots in the block department, failed to score off kill-blocks all game long.Moreover, the Ateneo Big Three could only cough up a combined 18 points.The Lady Spikers let loose their bombers—led by rookie Jolina dela Cruz, who top-scored with 14 points—to dismantle Ateneo’s dreaded defense.ADVERTISEMENT View comments
Private companies step in to help SEA Games hosting View comments Rafael Nadal rallies to beat Mayer in 3 sets in Barcelona Open Cayetano: Senate, Drilon to be blamed for SEA Games mess PH underwater hockey team aims to make waves in SEA Games PLAY LIST 02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City01:07Trump talks impeachment while meeting NCAA athletes02:49World-class track facilities installed at NCC for SEA Games02:11Trump awards medals to Jon Voight, Alison Krauss Duterte wants probe of SEA Games mess Early in the season, Caris LeVert was the Nets’ best player and Russell sometimes sat on the bench in the fourth quarter. But with the Nets at 8-18 in December and LeVert sidelined with a dislocated right foot, Russell began to find his form. Brooklyn surged up the standings, eventually finishing sixth in the Eastern Conference at 42-40 after missing the postseason the last three years.Keep the young core of Russell, LeVert, Spencer Dinwiddie and Jarrett Allen, and the Nets can probably keep contending for spots toward the lower half of the East. But they might not get much farther without adding one of the superstars who’ll be available this summer in free agency.“We’re a young, talented group, but you’ve also got to bring in a really, really talented player or players,” veteran forward DeMarre Carroll said. “And that’s the reality of the thing, because the young guys are going to continue to keep getting better — they were great this year. Then you’ve got veteran leaders who are going to definitely help those young guys out, but sometimes you’ve got to have a game-changer and I think what’s what Brooklyn’s going to try to do this year.”Some of those potential game-changers, such as Kyrie Irving and Kemba Walker, play Russell’s position. The point guard would be a restricted free agent, allowing the Nets to match any offer for him, and he gave them plenty of reasons to want him around.But he’s seen enough to know nothing is certain, so he was careful to not even say much about what he hoped would happen. For now, he settled for being proud of his and the team’s accomplishments, after rebuilding his reputation as more of a leader since arriving in Brooklyn after a trade with the Lakers.ADVERTISEMENT DA eyes importing ‘galunggong’ anew Nets players were proud of their accomplishments but realistic about the future Wednesday, a day after they were routed by the 76ers in Game 5 of their return to the postseason.Changes are necessary if the Nets want to contend with a team like Philadelphia. So players heading into free agency can’t be certain of their futures in Brooklyn.FEATURED STORIESSPORTSPrivate companies step in to help SEA Games hostingSPORTSPalace wants Cayetano’s PHISGOC Foundation probed over corruption chargesSPORTSSingapore latest to raise issue on SEA Games food, logisticsNot even Russell, the former No. 2 pick, who had a breakout season.“Hell yeah, I definitely want to be here,” he said. “But I also know it’s a business too, so I’m not going to play that role like I don’t know what could possibly happen.” Don’t miss out on the latest news and information. LATEST STORIES Philippine Arena Interchange inaugurated MOST READ Brooklyn Nets guard D’Angelo Russell, top, and guard Caris LeVert (22) fall on the court during the second half of Game 4 of a first-round NBA basketball playoff series against the Philadelphia 76ers, Saturday, April 20, 2019, in New York. (AP Photo/Mary Altaffer)NEW YORK— D’Angelo Russell was an All-Star and the Brooklyn Nets became a playoff team. Neither looked likely four months ago.So it was a surprisingly successful season, though there’s plenty of work left for the Nets to do — including deciding whether Russell will have a role.ADVERTISEMENT Hontiveros presses for security audit of national power grid Panelo: Duterte ‘angry’ with SEA Games hosting hassles “I talked to Kobe once and I remember him saying make new headlines,” Russell said. “Whatever your old headline is or what people think about you, make new ones and I took pride into doing that.”Some other things to know about the Nets:CHANGE IS INEVITABLELike Carroll, fellow veterans Jared Dudley and Ed Davis knew the Nets will want and need to upgrade in the summer, rather than keeping the team intact.“You have to improve, some way, somehow,” Davis said. “I’ve never been on a team where you brought back the same group. So that’s not going down. That ain’t happening.”POST TO PERIMETERAllen said part of his offseason focus will be working on his 3-point shot. The center was 6 for 45 (13.3 behind the arc this season.BETTER PLACEAfter winning 21, 20 and 28 games the last three seasons, the Nets believe their leap to an above-.500 finish came at the perfect time heading into free agency.“The story before this was the Nets were the worst team in the NBA,” Allen said. “Even when we weren’t the worst team, we still were in the eyes of the public. So just coming in here, just showing that we made the playoffs and have a lot of talent, young talent, I think we made it a more attractive destination.” REGARDS FROM RUSSIATeam owner Mikhail Prokhorov issued a statement congratulating the Nets for landing a playoff spot that few people believed they would.“More importantly, it’s clear that the Nets are a team building a winning culture and our future is bright,” Prokhorov added.Sports Related Videospowered by AdSparcRead Next SEA Games hosting troubles anger Duterte