Posts tagged produce
No sleepy heads, these Buffs–94 to 70 over Jackson St.
Nov 17th
Boyle called the win “a great team victory and I think our team took a step forward . . . it’s one game but it’s a positive thing to build on. I’m proud of them for playing together.” That sharing, said Boyle, makes positive reinforcement so much easier: “It was more of a feel-good victory . . . you want them reinforced with positive things. When we share the ball like we did, with seven guys in double figures, that’s fun. It’s better to reinforce in a positive way . . . you can catch more flies with honey.” Dinwiddie and Booker – CU’s starting backcourt – combined for 26 points and had 12 of their team’s 23 assists. Booker’s six assists were a career high, as were Dinwiddie’s six steals. Seven Buffs – the most in the Boyle era – reached double figures, topped by Booker’s 15. Xavier Talton and freshman Dustin Thomas scored 13 each, Jaron Hopkins added 12, Dinwiddie and Josh Scott 11 each, and Wesley Gordon had 10. It was the first time CU had at least six players in double figures since Dec. 19, 2010 against Longwood. The school record is eight, set in 1973 against Iowa State. Jackson State coach Wayne Brent left “brunch with the Buffs” impressed. “They have the most talented team we’ve have played from every spot,” he said. “You have two guards that have a chance to play in the NBA, you have a post guy who is really good. They have guys that are 6-5, 6-6; they are long and athletic looking . . . just a very talented team.” Boyle used every player – 14 in all – who suited up. Sophomore forward Xavier Johnson watched from the bench in street clothes, held out after being “dinged,” said Boyle, in Friday’s practice. Starting in Johnson’s place was Jaron Hopkins, and the 6-5 freshman opened the morning’s scoring with a three-pointer from the left wing. Before the half was done, Hopkins had hit four of his five field goal attempts, gathered two rebounds and made two assists. One of his field goals was a soaring dunk off an alley-oop pass from Spencer Dinwiddie. If the crowd needed a wakeup call, Hopkins’ slam provided it. “It was a really good feeling for me getting the crowd involved and just playing to win,” said Hopkins, who wasn’t told he would start until about 8 minutes before tip. “I played as hard as I could; I left it all out on the floor.” The Buffs led by as many as 13 (46-33) in the first half’s final minute and went to the locker room with a 46-35 advantage. Their first-half offensive execution was its best through four games; they shot 64 percent from the field (16-for-25) and had 14 assists on those 16 baskets. They finished the morning at 62.2 percent from the field (28-of-45), hit a season-best nine of 17 three-point attempts and outscored the visitors in the paint 36-18. Defensively, CU held Jackson State (1-3) to 39.1 percent shooting (25-of-64). Talton hit three of four trey attempts and “was great,” Boyle said. “He gave us steady minutes off the bench . . . Sabatino (Chen) did that last year for us and ‘XT’ can have that effect.” While CU’s nine threes were a season high, Jackson State provided proof that the Buffs’ three-point defense still needs work – at least in the first-half as they continue to adjust to the new hand-checking rule. UT-Martin shot 41 percent from behind the arc, and Wyoming half of its 10 first-half treys before CU clamped down in the second half, allowing the Cowboys only two of 11. Jackson State, though, scorched CU for six first-half treys on 12 attempts. Freshman guard Javares Brent canned four of seven tries, finishing with 14 first-half points. Playing at altitude might suit him: He scored a then season-high 17 points on Thursday night in the Tigers’ two-point (84-82) at Air Force before hitting a game-best 20 points Saturday morning. “Sometimes he was wide open,” Booker said, “but one time before half I was basically shaking hands with him. He’s a good player. Coach says if we play great defense for 40 minutes they’re not going to make those kinds of shots.” But as the Buffs did against the Cowboys, they tightened down the perimeter after halftime. Jackson State got seven second-half trey attempts and hit just one. CU opened the second half with a 5-0 run (a trey by Booker, two free throws by Dinwiddie) and took its largest lead of the morning to that point – 16 points at 51-35 – less than a minute into the last 20. Before the final buzzer, the Tigers, projected as fifth-place finishers in the SWAC, never got closer than 11 points. A pair of free throws by CEC favorite Ben Mills pushed the Buffs up by 25 points (91-66) with 1:50 left and many in the crowd might have started thinking football. (CU hosted Cal at 3:30 p.m. at Folsom Field.) The Buffs return to the CEC Monday night (7 p.m., Pac-12 Network) to play Arkansas State, which won 65-61 last week at Jackson State. Contact: BG.Brooks@Colorado.EDU Andrew Green | Assistant Director Sports Information Department of Intercollegiate Athletics | University of Colorado Boulder | 357 UCB | Fieldhouse Annex 50 Office: 303-492-3812 | Fax: 303-492-3811 | andrew.green@colorado.edu CUBuffs.com | @CUBuffs | Facebook [includeme src=”http://c1n.tv/boulder/media/bouldersponsors.html” frameborder=”0″ width=”670″ height=”300″]
CU researchers find hyper evolution in walking stick insects
Oct 21st
off a cascade of ecological impacts,
new CU-Boulder study finds
A California walking stick insect that has evolved to produce individuals with two distinct appearances—an all-green form that camouflages well with broader leaves and a form with a white stripe running down its back that blends better with needle-like leaves—can markedly affect its broader ecological community when the appearance of the bug is mismatched with the plant it’s living on.
The new findings, based on research carried out at the University of Colorado Boulder, illustrate the ability of rapid evolution to cause a cascade of ecological impacts.
The scientists found that a walking stick insect that is not well camouflaged is more likely to be eaten by birds, and in turn, those birds are then also more likely to feast on the spiders, caterpillars, plant hoppers, ants and other arthropods living on the same plant. The resulting overall reduction in bugs living on the plant also means that the plant itself was less likely to be attacked by sap-feeding insects.
“Our study shows that the evolution of poor camouflage in one species can affect all the other species living there and affect the plant as well,” said Tim Farkas, lead author of the study published in the journal Current Biology. “It’s intuitive, but also really surprising.”
Farkas led the study as an ecology and evolutionary biology doctoral student in Assistant Professor Patrik Nosil’s lab at CU-Boulder. Nosil and CU-Boulder doctoral student Aaron Comeault are also study co-authors. All three have since moved to the University of Sheffield in England.
Evolution is often thought of as a process that unfolds slowly over centuries if not millennia, as individuals with genetic advantages have a greater chance of surviving to pass down their genes to the next generation.
But scientists are increasingly identifying instances when evolution works on a much shorter time scale. An oft-cited example of rapid evolution is the peppered moth. The light-colored moths were historically able to camouflage themselves against lichen-covered tree bark in England. A darker variant of the moth existed but was more rare, since birds were able to easily spot the dark moth against the light trees. But during the industrial revolution, when soot blackened the trees, natural selection favored a darker variation of the moth, which began to flourish while the light-colored variant became less common.
Evolution on such a rapid scale opens up the possibility that the process could have ecological effects in the short term, impacting population sizes or changing the community makeup, for example.
Researchers have begun to compile examples of these “eco-evolutionary dynamics.” The new study offers some of the most comprehensive evidence yet that evolution can drive ecological change.
“We have combined both experimental and observational data with mathematical modeling to show that evolution causes ecological effects and that it does so under natural conditions,” Farkas said. “We also focused simultaneously on multiple evolutionary processes—including natural selection and gene flow—rather than just one, which affords us some unique insights.”
Farkas and his colleagues—including Ilkka Hanski and Tommi Mononen, both of the University of Helsinki in Finland—focused their attention on the walking stick Timema cristinae, which lives in Southern California. The flightless insect lives primarily on two shrubs: chamise, which has narrow, needle-like leaves; and greenbark ceanothus, which has broad, oval-shaped leaves. The variant of the walking sticks that have a white stripe down their backs are better camouflaged on the chamise, while the solid-green walking sticks are better camouflaged on the greenbark ceanothus.
The research team began by cataloguing the walking sticks living on the two types of shrubs in 186 research patches, and determined that the striped walking sticks were indeed more common on chamise and vice versa.
In a second experiment, the researchers artificially stocked the needle-like chamise with the different variants of walking sticks. A month later, they sampled the shrubs and found that more striped walking sticks survived than un-striped walking sticks. They also found that chamise stocked with striped walking sticks were home to a greater number of arthropods as well as a greater variety of arthropods than shrubs stocked with un-striped walking sticks. Finally, there were more leaves damaged by hungry insects on chamise stocked with striped walking sticks.
The scientists surmised that the differences were caused by scrub jays and other birds that feed on walking sticks. A group of easy-to-spot walking sticks could attract birds, which might then feed on other arthropods as well. To test their idea, the researchers repeated the experiment, but in this case, they caged some of the shrubs to keep the birds from feeding. As they expected, the caged chamise stocked with un-striped walking sticks did not have the same drop in numbers as they did when the bushes were not caged.
“Studies of how rapid evolution can affect the ecology of populations, communities and ecosystems are difficult to accomplish and therefore rare,” Farkas said. “We’re hoping our research helps biologists to appreciate the extent of dynamic interplay between ecology and evolution, and that it can be used by applied scientists to combat emerging threats to biodiversity, ecosystem services, and food security.”
Funding for the study was provided by CU-Boulder, the European Research Council and the Academy of Finland.
-CU-
More rain to come this evening
Sep 14th
Flash Flood Watch in Northeastern Colorado
Active for next 1 day, 8 hours Locations: Boulder And Jefferson Counties Below … Show more
Posted 5 hours, 47 minutes ago – National Weather Service
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Potential for flash flooding in the mountains, and in and near the foothills this afternoon through Sunday afternoon.
A weak upper level trough will move slowly across the area this afternoon through Sunday. Meanwhile a cool front will move across Northeast Colorado late tonight and increase upslope flow.
Scattered showers and thunderstorms will develop this afternoon and linger into the early evening hours. Rainfall amounts will range from one quarter inch to one half inch. However stronger thunderstorms could produce up to an inch or more of rain in less than 45 minutes in a few locations.
There will be a lull in activity this evening however rain and a few thunderstorms may increase in the northern foothills and mountain areas north of I-70 after midnight as upslope flow develops. Additional rainfall amounts of one half inch to one inch may occur between midnight and 6 am Sunday morning in some locations. For Sunday there will be periods of rain along with a few thunderstorms in the mountains and in and near the foothills. Additional rainfall amounts of 1 to 2 inches could occur in some locations by late Sunday afternoon.
Thus if this additional heavy rainfall occurs then there could be more flash flooding as the ground is extremely saturated.
Flash Flood Watch in effect from noon MDT today through Sunday afternoon.
The National Weather Service in Denver has issued a Flash Flood Watch for portions of central Colorado, North Central Colorado and northeast Colorado, including the following areas, in central Colorado, Jefferson and West Douglas Counties above 6000 feet/gilpin/clear Creek/northeast Park counties below 9000 feet and south and southeast grand/west Central and Southwest Boulder/gilpin/clear Creek/summit/north and West Park counties above 9000 feet. In North Central Colorado, Larimer County below 6000 feet/northwest Weld County, Larimer and Boulder counties between 6000 and 9000 feet and South and East Jackson/larimer/north and northeast Grand/northwest Boulder counties above 9000 feet. In Northeast Colorado, Boulder and Jefferson counties below 6000 feet/west Broomfield County.
- From noon MDT today through Sunday afternoon.
- Additional rainfall amounts of 1 to 2 inches with up to 3 inches will be possible in the mountains, and in and near the foothills through Sunday afternoon. At this time the best chance of heavier rainfall appears to be from late tonight through Sunday afternoon. However Scatttered thunderstorms this afternoon into the early evening hours could produce up to an inch of rain in less than 45 minutes in some locations which could lead to flash flooding as well.
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