| 释义 |
Definition of die-off in US English: die-offnoun 1A period in which a significant proportion of a population dies naturally, usually within a short time. Example sentencesExamples - Their research on carbonate-rich sediments in which the dinosaurs were buried suggests the area was near or in a spring, and that there were at least two mass die-offs.
- Regardless of what caused them though, the die-offs, like the victims were colossal.
- Their populations fluctuate because of winter die-offs in particularly cold years, but the Breeding Bird Survey has not detected any significant, long-term population changes in Washington.
- Since the Cambrian period, we have only die-off and no new groups coming about, ever.
- These major die-offs will continue to occur at unpredictable intervals when the most extensive, persistent, extremely unfavourable snow and ice conditions prevail.
- Texas coastal marine life - fish, crab, marine turtles, shrimp, etc. - can suffer extensive die-offs if unusually cold weather strikes the bays and lingers.
- They do not appear to do well in harsh winters, and die-offs are often observed in severe winters, which may limit their numbers in some parts of Washington.
- Sixty-five million years ago, a collision with an asteroid is believed to have caused a global die-off that included all dinosaurs.
- Few species or sites have recovered, and carpets of algae - flourishing in the aftermath of overfishing and die-offs of sea urchins and other algae-eaters - now dominate many Caribbean reefs.
- A basis of the theory is the belief that the ancient animal die-offs coincided with the migration of the first large human populations into North America.
- We're witnessing one of the greatest (if that's the right word to use) die-offs this planet has ever seen.
- Yet it is plausible for the Eared Grebe because, except for large but irregular die-offs involving losses to disease and migration, annual mortality appears to be low.
- Disproportionate mortality between males and females among all 1 + yr old caribou, and between bulls and cows during the interim three years of die-off, was also tested using chi-square.
- That makes the famous mass extinction that wiped out the dinosaurs some 65 million years ago seem like a minor die-off.
- 20 years ago, the world's panda population was feared to have fallen to around 1,000, their numbers depleted by low fertility, illegal logging, poaching and periodic die-offs of their staple food, bamboo.
- This is strong evidence that these eruptions caused, at least in part, the global die-off, which some scientists have ascribed to a meteor impact.
- She attributes the decline in plants such as eelgrass to pollution, high-speed water traffic and natural cyclic die-offs.
- Two major die-offs among perch 100 mm were both followed by strong recruitment.
- The theory implies, but does not ever really try to prove, that the dates the supposed mutations occurred have some timing connection with the dates of population die-offs and the appearance in the fossil record of new body forms.
- So the earth, and the human species, could probably survive a pretty large die-off.
- 1.1 A process causing die-off.
Example sentencesExamples - During the course of the study, two major die-offs took place, selectively affecting larger cannibalistic individuals, followed by several years of successful recruitment of young fish.
- Once a trigger mechanism sets the process of a die-off in motion, he adds, common organisms become massive killers.
- Ichthyosaurs gradually disappear from the fossil record of about 90 million years ago, a full 25 million years before mass die-offs wiped out the dinosaurs.
- Biologists fear the die-offs will further degrade coral reefs in the Caribbean, a region that by one estimate has already lost 80 percent of its coral cover over the last three decades.
- A month later, the sober rats had lost about half of those new cells through normal die-off.
- Researchers say they have yet to gauge the full extent of the die-off.
- As aquatic vegetation decomposes, either as a result of herbicide use or natural die-off, the process uses oxygen.
- 1.2 The death of a significant proportion of a population from die-off.
Example sentencesExamples - Day after day they kept washing up; by the third day, biologists were estimating that 33,000 fish had been killed in one of the largest salmon die-offs in U.S. history.
- The authors conclude that recent marine ecosystem collapses, including die-offs of seagrass beds, kelp forests and coral reefs, often had their origins decades or even centuries earlier.
- Scientifically speaking, the last die-off technically ended on Jan. 5 because no new deaths were reported in the two weeks following that date.
- During the past six years, salt marshes in the southeastern United States - in Georgia and Louisiana especially - have experienced unprecedented die-offs.
- Research by these scientists and others has identified many deadly viral infections as well as the chytrid fungus as factors in some amphibian die-offs and population declines.
- It causes die-offs of plankton and fish and affects Pacific jet stream winds, altering storm tracks and creating unusual weather patterns in various parts of the world.
- Some of the Indian tribes in the Brazilian interior were well aware that massive die-offs from disease often followed contact with Europeans, and some of them would club explorers to death rather than introduce them to their villages.
- But he thinks that in coastal California the ecological damage from large die-offs of oaks could surpass the harm caused by chestnut blight back east.
- The researchers' analysis led them to conclude that such targeted immunizations can prevent major die-offs in wild Ethiopian wolves.
- In addition, mussels' lack of mobility renders them susceptible to massive die-offs from acute stresses, such as chemical spills.
- Either periodic passage of the solar system through molecular clouds or periodic massive volcanic eruptions could be behind the massive die-offs.
- At the same time, seabird populations have suffered large die-offs, crab and shrimp populations have crashed, unusual algae have bloomed, sea ice has shrunk, and gray whales have washed up dead.
- If global warming shrinks the ranges of species until they go extinct, then shouldn't massive die-offs have happened 11, 500 years ago?
- As news about global warming, genetically modified foods, meat scares and massive wildlife die-offs become more prevalent, people have begun to hear more of the voices calling for change.
- Transmission of diseases such as avian influenza, salmonensis, and avian cholera could lead to massive die-offs of urban and wild Canada geese and other species.
- The U.S. Global Change Research Program blames coastal runoff for beach closings, coral reef die-offs and ‘dead zones,’ including the New Jersey-sized expanse choking out life in the Gulf of Mexico.
- There weren't many major die-offs, but I do think in some areas habitat quality is diminished from prestorm conditions.
- Red tide algal blooms - sudden, massive growths of algae - are known to cause massive fish die-offs, and often prompt authorities to shut down beaches and shellfish beds.
- The deaths have alarmed conservationists and triggered investigations, but the exact cause of the mysterious die-offs remains unknown.
- There is evidence of a long-term decline in the West, and large die-offs were observed in the early 1990s at coastal reefs in southeastern Alaska.
Definition of die-off in US English: die-offnoun 1A period in which a significant proportion of a population dies naturally, usually within a short time. Example sentencesExamples - 20 years ago, the world's panda population was feared to have fallen to around 1,000, their numbers depleted by low fertility, illegal logging, poaching and periodic die-offs of their staple food, bamboo.
- Their populations fluctuate because of winter die-offs in particularly cold years, but the Breeding Bird Survey has not detected any significant, long-term population changes in Washington.
- Since the Cambrian period, we have only die-off and no new groups coming about, ever.
- They do not appear to do well in harsh winters, and die-offs are often observed in severe winters, which may limit their numbers in some parts of Washington.
- The theory implies, but does not ever really try to prove, that the dates the supposed mutations occurred have some timing connection with the dates of population die-offs and the appearance in the fossil record of new body forms.
- This is strong evidence that these eruptions caused, at least in part, the global die-off, which some scientists have ascribed to a meteor impact.
- Disproportionate mortality between males and females among all 1 + yr old caribou, and between bulls and cows during the interim three years of die-off, was also tested using chi-square.
- We're witnessing one of the greatest (if that's the right word to use) die-offs this planet has ever seen.
- Yet it is plausible for the Eared Grebe because, except for large but irregular die-offs involving losses to disease and migration, annual mortality appears to be low.
- These major die-offs will continue to occur at unpredictable intervals when the most extensive, persistent, extremely unfavourable snow and ice conditions prevail.
- A basis of the theory is the belief that the ancient animal die-offs coincided with the migration of the first large human populations into North America.
- Few species or sites have recovered, and carpets of algae - flourishing in the aftermath of overfishing and die-offs of sea urchins and other algae-eaters - now dominate many Caribbean reefs.
- Two major die-offs among perch 100 mm were both followed by strong recruitment.
- Texas coastal marine life - fish, crab, marine turtles, shrimp, etc. - can suffer extensive die-offs if unusually cold weather strikes the bays and lingers.
- So the earth, and the human species, could probably survive a pretty large die-off.
- That makes the famous mass extinction that wiped out the dinosaurs some 65 million years ago seem like a minor die-off.
- Regardless of what caused them though, the die-offs, like the victims were colossal.
- Their research on carbonate-rich sediments in which the dinosaurs were buried suggests the area was near or in a spring, and that there were at least two mass die-offs.
- Sixty-five million years ago, a collision with an asteroid is believed to have caused a global die-off that included all dinosaurs.
- She attributes the decline in plants such as eelgrass to pollution, high-speed water traffic and natural cyclic die-offs.
- 1.1 A process causing die-off.
Example sentencesExamples - Once a trigger mechanism sets the process of a die-off in motion, he adds, common organisms become massive killers.
- Researchers say they have yet to gauge the full extent of the die-off.
- Biologists fear the die-offs will further degrade coral reefs in the Caribbean, a region that by one estimate has already lost 80 percent of its coral cover over the last three decades.
- Ichthyosaurs gradually disappear from the fossil record of about 90 million years ago, a full 25 million years before mass die-offs wiped out the dinosaurs.
- As aquatic vegetation decomposes, either as a result of herbicide use or natural die-off, the process uses oxygen.
- During the course of the study, two major die-offs took place, selectively affecting larger cannibalistic individuals, followed by several years of successful recruitment of young fish.
- A month later, the sober rats had lost about half of those new cells through normal die-off.
- 1.2 The death of a significant proportion of a population from die-off.
Example sentencesExamples - Red tide algal blooms - sudden, massive growths of algae - are known to cause massive fish die-offs, and often prompt authorities to shut down beaches and shellfish beds.
- Day after day they kept washing up; by the third day, biologists were estimating that 33,000 fish had been killed in one of the largest salmon die-offs in U.S. history.
- Some of the Indian tribes in the Brazilian interior were well aware that massive die-offs from disease often followed contact with Europeans, and some of them would club explorers to death rather than introduce them to their villages.
- During the past six years, salt marshes in the southeastern United States - in Georgia and Louisiana especially - have experienced unprecedented die-offs.
- There weren't many major die-offs, but I do think in some areas habitat quality is diminished from prestorm conditions.
- Scientifically speaking, the last die-off technically ended on Jan. 5 because no new deaths were reported in the two weeks following that date.
- Either periodic passage of the solar system through molecular clouds or periodic massive volcanic eruptions could be behind the massive die-offs.
- The U.S. Global Change Research Program blames coastal runoff for beach closings, coral reef die-offs and ‘dead zones,’ including the New Jersey-sized expanse choking out life in the Gulf of Mexico.
- Transmission of diseases such as avian influenza, salmonensis, and avian cholera could lead to massive die-offs of urban and wild Canada geese and other species.
- At the same time, seabird populations have suffered large die-offs, crab and shrimp populations have crashed, unusual algae have bloomed, sea ice has shrunk, and gray whales have washed up dead.
- There is evidence of a long-term decline in the West, and large die-offs were observed in the early 1990s at coastal reefs in southeastern Alaska.
- The researchers' analysis led them to conclude that such targeted immunizations can prevent major die-offs in wild Ethiopian wolves.
- In addition, mussels' lack of mobility renders them susceptible to massive die-offs from acute stresses, such as chemical spills.
- Research by these scientists and others has identified many deadly viral infections as well as the chytrid fungus as factors in some amphibian die-offs and population declines.
- But he thinks that in coastal California the ecological damage from large die-offs of oaks could surpass the harm caused by chestnut blight back east.
- If global warming shrinks the ranges of species until they go extinct, then shouldn't massive die-offs have happened 11, 500 years ago?
- The authors conclude that recent marine ecosystem collapses, including die-offs of seagrass beds, kelp forests and coral reefs, often had their origins decades or even centuries earlier.
- As news about global warming, genetically modified foods, meat scares and massive wildlife die-offs become more prevalent, people have begun to hear more of the voices calling for change.
- It causes die-offs of plankton and fish and affects Pacific jet stream winds, altering storm tracks and creating unusual weather patterns in various parts of the world.
- The deaths have alarmed conservationists and triggered investigations, but the exact cause of the mysterious die-offs remains unknown.
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