| 单词 | water flea |
| 例句 | Parthenogenesis occurs in invertebrates such as water fleas, rotifers, aphids, stick insects, and ants, wasps, and bees. Concepts of Biology 2013-04-25T00:00:00Z Based on laboratory tests, scientists who documented soaring acidity in the German reservoirs found it can imperil a type of water flea by hampering defense from predators. Scientists: Atmospheric carbon might turn lakes more acidic 2022-12-19T05:00:00Z But evidence of the potential effects of PVA “are scarce,” said Magni, who co-authored a study that did not find toxic effects associated with the compound in fish embryos and a species of water flea. Does the film around detergent pods really biodegrade? A debate is raging. 2022-11-15T05:00:00Z But over time, urban water fleas living generation after generation in warmer, urban pond waters have genetically changed to have those same kinds of alterations. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z “Typically this type of paddling is seen in small aquatic crustaceans such as water fleas,” says Santhanakrishnan, who was not involved with the study. Tiny Flier ‘Swims’ through the Air at Superspeed 2022-03-21T04:00:00Z The migration was first documented in the early 1800s, when naturalist Georges Cuvier noted that plankton called daphnia—water fleas—were disappearing and reappearing in a daily cycle in a shallow freshwater lake. The Ups and Downs of a Great Vertical Migration 2021-12-06T05:00:00Z Euplotes skitters nimbly along surfaces atop cirri like some sort of Close Encounters–class water flea. Can a Cell Make Decisions? 2021-05-22T04:00:00Z They include creatures such as ticks, water fleas, and tardigrades—the eight-legged invertebrates that trundle around their impressive range of habitats like chubby, determined bears. Watch Blood Cells Stream Around an Air Bubble. It’s Very Soothing. 2021-04-23T04:00:00Z In lab tests, water fleas taken from ponds surrounded by conventional farmland displayed higher resistance to a pesticide called chlorpyrifos that’s routinely employed in such farming. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z Daphne, named after daphnia, a type of water flea, credited with helping clear the waters of Lake Washington of blue-green algae after sewage stopped regularly flowing into the lake in the 1960s. MudHoney? Sir Digs-A-Lot? Seattle wants your help in naming its next massive tunnel machine 2021-03-27T04:00:00Z And several studies published in the past 3 years suggest the eyes of killifish and water fleas vary in size depending on the presence of predators. Eye size predicts where birds breed and feed 2020-10-27T04:00:00Z People contract the parasite by drinking water that contains microscopic water fleas, known as copepods, that carry Guinea-worm larvae. Exclusive: Battle to wipe out debilitating Guinea worm parasite hits 10 year delay 2019-09-29T04:00:00Z While the McGill study did not explore the human-health impacts of consuming this plastic, when some of the particles were given to water fleas, they began acting erratically and developed some deformities, Tufenkji said. Your tea bags might be releasing billions of plastic particles into your brew, study shows 2019-09-27T04:00:00Z Looking up the food chain, Brans and colleagues have evidence that urban water fleas and predatory insects that eat them—damselflies—are evolving in step with each other. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z This week Hintz published a new paper focusing on the fate of the water flea, a tiny critter that tends to thrive in such large numbers that it has a key influence on ecosystem health. Freshwater is Getting Saltier, Threatening People and Wildlife 2018-12-06T05:00:00Z In one such study, Abraham E. Tucker of Southern Arkansas University and his colleagues studied 11 asexual species of water fleas, a tiny kind of invertebrate. This Mutant Crayfish Clones Itself, and It’s Taking Over Europe 2018-02-05T05:00:00Z Similar studies in aphids and water fleas have confirmed that rapid evolution can affect characteristics of populations, such as how fast they grow. How Warp-Speed Evolution Is Transforming Ecology 2018-02-01T05:00:00Z So they ran experiments on the humble water flea. Climate Change Is Altering Lakes and Streams, Study Suggests 2018-01-11T05:00:00Z Urban damselfly larvae are far better than rural damselfly larvae at encountering and gobbling up rural water fleas, for example. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z “The demise of water fleas does not just affect the clarity of the water, but will likely also impact the small fish that feed on them,” Hintz adds. Freshwater is Getting Saltier, Threatening People and Wildlife 2018-12-06T05:00:00Z That testing involves students helping to constantly breed fathead minnows and Ceriodaphnia dubia, a species of water flea that is used in testing water quality. Arkansas State University researches water quality 2017-09-11T04:00:00Z To get the nutrients it needs, it spends its time floating in lakes and waterways eating miniature crustaceans, called water fleas, and other things. Genetic Tidying Up Made Humped Bladderworts Into Carnivorous Plants 2017-05-19T04:00:00Z Dr. Hasler’s own recent research hints that water fleas may not be the only freshwater animals to be altered by carbon dioxide. Climate Change Is Altering Lakes and Streams, Study Suggests 2018-01-11T05:00:00Z These microbial communities—or microbiome—shape what the water fleas can eat, and some flea genotypes encourage microbiomes that enable fleas to digest toxic cyanobacteria that can overrun ponds. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z “Under experimental conditions water fleas do seem able to evolve adaptations to moderate salt levels,” Hintz says. Freshwater is Getting Saltier, Threatening People and Wildlife 2018-12-06T05:00:00Z The water flea has seen its genetics change over just a few decades to respond to higher water temperatures. Climate change impacting ‘most’ species on Earth, even down to their genome 2017-04-05T04:00:00Z When dogs lap water, water fleas skitter away, so it’s unlikely dogs are ingesting larvae-infested water fleas directly. The world is closer than ever to eradicating Guinea worm 2016-08-20T04:00:00Z If water fleas do a worse job of escaping predators, their population may decline, leaving less food in the long run for fish. Climate Change Is Altering Lakes and Streams, Study Suggests 2018-01-11T05:00:00Z The water flea Daphnia magna—a freshwater crustacean up to a few millimeters in size—is one species busy evolving in cities in response to heat, pollution and even local predators. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z On the nudibranch and the sea slug aplysia, the water flea and sea urchins. Verge Fiction: Model Organisms 2015-08-02T04:00:00Z There are also ways of chemically treating water sources to reduce populations of water fleas, but the microorganisms eventually return. This Species is Close to Extinction and That's a Good Thing 2015-01-23T05:00:00Z Those experiments should reveal whether sea monkeys are better mixers than water fleas. Can sea monkeys stir the sea? 2014-09-30T04:00:00Z The spiny water flea is native to Eurasia. Scientists say spiny water flea reaches Champlain 2014-08-28T04:00:00Z For water fleas, it turns out that both are at play. Urban Evolution: How Species Adapt to Survive in Cities 2022-03-25T04:00:00Z The team used water fleas for the experiment, placing five at a time in beakers filled with different diluted concentrations of MCHM. Study: MCHM, Chemical in West Virginia Spill, More Toxic Than Previously Reported 2014-07-10T04:00:00Z The tiny creature called the spiny water flea disrupts the food chain and clings to fishing line. Invasive spiny water flea heads for Lake Champlain 2014-07-07T04:00:00Z The water flea, for example, experiences fluctuations in fertility throughout its life span and a more gradual rise in mortality. This Tiny Animal Can Live an Estimated 1,400 Years 2014-02-09T13:00:00Z The water flea is the 50th non-native invasive species found in Lake Champlain. Scientists say spiny water flea reaches Champlain 2014-08-28T04:00:00Z The resurrected animals are known scientifically as Daphnia and informally as water fleas. Matter: A Living Time Capsule Shows the Human Mark on Evolution 2014-01-09T03:00:01Z “We’ve tested everything from leeches to water fleas to several species of fish,” Pyle said. Fish Cannot Smell in Polluted Waters 2013-03-18T16:15:25.213Z Finally, fish at both doses were much greedier and more efficient feeders, darting after fat-bellied water fleas with vigor while drug-free fish hung back. Drugged Fish Lose Their Inhibitions, Get the Munchies 2013-02-14T22:30:00Z Other macroinvertebrates like water fleas took a bit longer, around 5 to 10 years, and these communities usually did not reach their original levels of richness or abundance. Green Blog: Not All Wetlands Are Created Equal 2012-01-24T22:00:12Z Scientists from the Lake Champlain Basin Committee say the spiny water flea is the first invasive zooplankton to be confirmed in the lake. Scientists say spiny water flea reaches Champlain 2014-08-28T04:00:00Z While the dating remains provisional for now, Dr. Post said he was confident that the oldest of the water fleas lived before Europeans colonized the United States. Matter: A Living Time Capsule Shows the Human Mark on Evolution 2014-01-09T03:00:01Z It may be found growing on water fleas, plants, decayed wood, or these tadpoles. School Reading by Grades Sixth Year 2011-07-31T02:00:11.420Z Within three years, the fish had taken over, producing a decline in tiny water plants and an explosion in water fleas. Boom and bust flags eco-collapse 2011-04-28T18:17:47Z And watched three-spined stickleback fish hunt water fleas, to the accompaniment of either white noise calibrated to match the noise level of speedboats or a silent track as a control. Boat Noise Makes Fish Miss Meals 2011-03-03T12:15:00.240Z The show includes the human genome sequence 10 years on, evolving a protein container, the ecoresponsive water flea genome, and more. [Podcast] Science Podcast 2011-02-03T19:26:31.840Z The scientists found that one genetic strain of water fleas dominated at the time — and continued to until the late 1800s. Matter: A Living Time Capsule Shows the Human Mark on Evolution 2014-01-09T03:00:01Z The water flea, Daphnia, represents a major taxonomic lineage of aquatic arthropod diversity. This Week in Science 2011-02-03T19:25:00.683Z Harmful effects of nitric oxide included developmental delay—water flea babies were born on schedule but were underdeveloped; some lacked appendages important for swimming, for instance. Fertilizer Chemicals Linked to Animal Developmental Woes 2010-08-31T14:07:00Z It is even possible in some cases, the water flea, for example, for the female to produce young without the necessity of fertilization by the male. Astounding Stories, April, 1931 A little water flea was described as a separate genus, Nauplius, before it was known to be the larva of a higher water flea, and so also Leptus was thought to be a mature mite. Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses Through the hole, the scientists lowered a tube and pushed it about three feet into the sediment — deep enough, Dr. Weider thought, to gather water flea eggs a few decades old. Matter: A Living Time Capsule Shows the Human Mark on Evolution 2014-01-09T03:00:01Z That environmental shift coincided with a drastic change in the genes of the water fleas. Matter: A Living Time Capsule Shows the Human Mark on Evolution 2014-01-09T03:00:01Z The more modern water fleas, on the other hand, used a different strategy. Matter: A Living Time Capsule Shows the Human Mark on Evolution 2014-01-09T03:00:01Z |
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