Showing posts with label Nature. Show all posts
Showing posts with label Nature. Show all posts
Sunday, November 21, 2010
Friday, September 3, 2010
Saturday, August 14, 2010
Friday, February 26, 2010
Wednesday, February 24, 2010
Trees retaliate when fig wasps don't service them
Figs and fig wasps help each other out: Fig wasps lay their eggs inside the fruit where the wasp larvae can safely develop, and in return, the wasps pollinate the figs.
But what happens when a wasp lays its eggs but fails to pollinate the fig?
The trees get even by dropping those figs to the ground, killing the baby wasps inside, reports a Cornell and Smithsonian Tropical Research Institute study published in the Proceedings of the Royal Society B: Biological Sciences (published online Jan. 13).
The findings suggest that when one species in a mutually beneficial relationship fails to hold up its end of the bargain, sanctions may be a necessary part of maintaining the relationship.
A female fig wasp (Tetrapus americanus) is about to enter a flowering fig (Ficus maxima).
Once inside, the fig wasp will pollinate and lay her eggs in the flowers that line the inside of the fig.
But what happens when a wasp lays its eggs but fails to pollinate the fig?
The trees get even by dropping those figs to the ground, killing the baby wasps inside, reports a Cornell and Smithsonian Tropical Research Institute study published in the Proceedings of the Royal Society B: Biological Sciences (published online Jan. 13).
The findings suggest that when one species in a mutually beneficial relationship fails to hold up its end of the bargain, sanctions may be a necessary part of maintaining the relationship.
A female fig wasp (Tetrapus americanus) is about to enter a flowering fig (Ficus maxima).
Once inside, the fig wasp will pollinate and lay her eggs in the flowers that line the inside of the fig.
Sunday, January 17, 2010
Sunday, December 13, 2009
X-Ray of Humming Bird in Flight
Nectar not only powers the humming bird but stabilizes it's head in flight to allow feeding. Pretty cool stuff.
Ichneumon Wasp
Interesting video about wearied Alcon butterfly and Icheumon wasp that both use ants to raise their young, but ichneumon wasp uses both Alcon Butterfly and ants both at the same time.
Friday, November 27, 2009
Friday, October 9, 2009
Kite Fishing
Kite fishing from Jonathan Clay on Vimeo.
Fishermen on the South Pacific island of Santa Catalina practice an ingenious method of catching fish, using a kite and spider silk.
This is a sequence from the film "Strange Islands", part of the BBC's documentary series "South Pacific".
Note to moderators: this film was directed and produced by myself for the BBC Natural History Unit.
Wednesday, September 16, 2009
PLIGHT OF BEES
A new study by the National Academy of Sciences suggests that scientists still do not know the exact cause of the disorder that has resulted in the mysterious disappearance of billions of honeybees. However there is some evidence that the bees may have been infected with multiple viruses that combined to create "the perfect storm."
This troubling phenomenon is the subject of a new documentary titled "The Last Beekeeper." The film follows commercial beekeepers from Montana, Washington, and South Carolina in an effort to shed light on the vital importance of honeybees and the struggles they face.
In recent years scientists have observed a pattern of abnormal behavior in colonies of honeybees across the nation - a puzzling phenomenon that could have far-reaching consequences. Thousands of colonies are dying off, and the cause remains a mystery. The problem began in 2006 and peaked last year. It is estimated that this phenomenon has resulted in the deaths of as much as 46 percent of the honeybee population throughout the United States.
Colony Collapse Disorder
For lack of a better name, scientists have dubbed this phenomenon "colony collapse disorder." Colony collapse disorder or CCD is the rapid and unexpected loss of adult worker bees from the colony over a very short period of time. Bees are flying off in search of pollen and nectar and simply never returning to their colonies. And nobody knows why. Researchers say the bees are presumably dying in the fields, perhaps becoming exhausted or simply disoriented and eventually falling victim to the cold.
According to a report by the National Research Council, "In CCD, the bee colony proceeds rapidly from a strong colony with many individuals to a colony with few or no surviving bees. Queens are found in collapsing colonies with a few young adult bees, lots of brood, and more than adequate food resources. No dead adult bees are found in the colony or outside in proximity to the colony. A unique aspect of CCD is that there is a significant delay in robbing of the dead colony by bees from other colonies or invasion by pest insects; this suggests the presence of a deterrent chemical or toxin in the hive."
Experts say that large-scale bee die-offs have happened before. However never before has the cause of death been so elusive. Scientists have so-far been unable to identify what is causing the deaths. The most likely possibilities are a parasite, an unknown virus, some kind of bacteria, pesticides, or some combination of these factors. A few have even suggested that the problem could be the result of fluctuations in the earth's magnetic field. Scientists believe the magnetic field is what enables migrating birds and other animals and insects - such as bees - to navigate. The problem has prompted congressional hearings and has left scientists around the world scrambling to find answers.
Why Are Bees So Important?
The reason experts are so concerned is that honeybees make more than just honey. Honeybee hives are rented out to growers to pollinate their crops, and many commercial beekeepers move around the country as the growing seasons change. Each year, an estimated more than 2 million bee colonies are rented out to farmers. What most people don't realize is that there are more than 90 crops that rely on honeybees for pollination. Among them are: apples, oranges, avocados, raspberries, strawberries, cherries, citrus fruit, melons, peaches, pears, artichokes, asparagus, broccoli, celery, cucumbers, soybeans, almonds and various other nuts, as well as a wide variety of other crops. In fact, according to the U.S. Department of Agriculture, about one-third of our food supply comes from insect-pollinated plants, and the honeybee is responsible for 80 percent of that pollination. Even cattle, which feed on alfalfa, depend on bees.
Kevin Hackett, head of the USDA's bee and pollination program, described colony collapse disorder as "the biggest general threat to our food supply." He also said that if the collapse worsens, we could end up being "stuck with grains and water."
In the US, honeybees are used to pollinate 15 billion dollars worth of fruits, vegetables, nuts and other crops annually. Zac Browning, vice president of the American Beekeeping Federation, described the importance of the bee population by saying "Every third bite we consume in our diet is dependent on a honeybee to pollinate that food." Thus the continued loss of billions of honeybees could have a substantial impact on our food supply and our economy
Documentary looks at plight of the honeybee
New Clues in the Mass Death of Bees
Life Without Bumblebees?
New Documentary Sheds Light on Plight of Bees
This troubling phenomenon is the subject of a new documentary titled "The Last Beekeeper." The film follows commercial beekeepers from Montana, Washington, and South Carolina in an effort to shed light on the vital importance of honeybees and the struggles they face.
In recent years scientists have observed a pattern of abnormal behavior in colonies of honeybees across the nation - a puzzling phenomenon that could have far-reaching consequences. Thousands of colonies are dying off, and the cause remains a mystery. The problem began in 2006 and peaked last year. It is estimated that this phenomenon has resulted in the deaths of as much as 46 percent of the honeybee population throughout the United States.
Colony Collapse Disorder
For lack of a better name, scientists have dubbed this phenomenon "colony collapse disorder." Colony collapse disorder or CCD is the rapid and unexpected loss of adult worker bees from the colony over a very short period of time. Bees are flying off in search of pollen and nectar and simply never returning to their colonies. And nobody knows why. Researchers say the bees are presumably dying in the fields, perhaps becoming exhausted or simply disoriented and eventually falling victim to the cold.
According to a report by the National Research Council, "In CCD, the bee colony proceeds rapidly from a strong colony with many individuals to a colony with few or no surviving bees. Queens are found in collapsing colonies with a few young adult bees, lots of brood, and more than adequate food resources. No dead adult bees are found in the colony or outside in proximity to the colony. A unique aspect of CCD is that there is a significant delay in robbing of the dead colony by bees from other colonies or invasion by pest insects; this suggests the presence of a deterrent chemical or toxin in the hive."
Experts say that large-scale bee die-offs have happened before. However never before has the cause of death been so elusive. Scientists have so-far been unable to identify what is causing the deaths. The most likely possibilities are a parasite, an unknown virus, some kind of bacteria, pesticides, or some combination of these factors. A few have even suggested that the problem could be the result of fluctuations in the earth's magnetic field. Scientists believe the magnetic field is what enables migrating birds and other animals and insects - such as bees - to navigate. The problem has prompted congressional hearings and has left scientists around the world scrambling to find answers.
Why Are Bees So Important?
The reason experts are so concerned is that honeybees make more than just honey. Honeybee hives are rented out to growers to pollinate their crops, and many commercial beekeepers move around the country as the growing seasons change. Each year, an estimated more than 2 million bee colonies are rented out to farmers. What most people don't realize is that there are more than 90 crops that rely on honeybees for pollination. Among them are: apples, oranges, avocados, raspberries, strawberries, cherries, citrus fruit, melons, peaches, pears, artichokes, asparagus, broccoli, celery, cucumbers, soybeans, almonds and various other nuts, as well as a wide variety of other crops. In fact, according to the U.S. Department of Agriculture, about one-third of our food supply comes from insect-pollinated plants, and the honeybee is responsible for 80 percent of that pollination. Even cattle, which feed on alfalfa, depend on bees.
Kevin Hackett, head of the USDA's bee and pollination program, described colony collapse disorder as "the biggest general threat to our food supply." He also said that if the collapse worsens, we could end up being "stuck with grains and water."
In the US, honeybees are used to pollinate 15 billion dollars worth of fruits, vegetables, nuts and other crops annually. Zac Browning, vice president of the American Beekeeping Federation, described the importance of the bee population by saying "Every third bite we consume in our diet is dependent on a honeybee to pollinate that food." Thus the continued loss of billions of honeybees could have a substantial impact on our food supply and our economy
Documentary looks at plight of the honeybee
New Clues in the Mass Death of Bees
Life Without Bumblebees?
New Documentary Sheds Light on Plight of Bees
Friday, September 11, 2009
Thursday, August 20, 2009
Rat Eating Plant
Rat-eating plant discovered in Philippines
A carnivorous pitcher plant that eats rats and insects has been discovered in the Philippines and named after Sir David Attenborough.
By Chris Irvine
Published: 11:52AM BST 17 Aug 2009
Rat-eating plant: The team of botanists, led by British experts Stewart McPherson and Alastair Robinson, found the plant on Mount Victoria in the Philippines. Photo: STEWART MCPHERSON
The plant is among the largest of all pitchers and is believed to be the largest meat-eating shrub, dissolving rats with acid-like enzymes.
The team of botanists, led by British experts Stewart McPherson and Alastair Robinson, found the plant on Mount Victoria in the Philippines.
They were inspired to search for the plant after word that it is existed came from two Christian missionaries who described seeing a large carnivorous pitcher in 2000 after they climbed the mountain.
Mr McPherson, of Poole Dorset, said: "The plant produces spectacular traps which catch not only insects, but also rodents. It is remarkable that it remained undiscovered until the 21st century."
The team, which found the plant in 2007 following a two-month expedition, published details of their discovery in the Botanical Journal of Linnean Society earlier this year following a three-year study of all 120 species of pitcher plant.
They decided to name the plant Nepenthes attenboroughii, after the wildlife broadcaster Sir David.
"My team and I named it in honour of Sir David whose work has inspired generations toward a better understanding of the beauty and diversity of the natural world," added Mr McPherson.
Sir David, 83, said: "I was contacted by the team shortly after the discovery and they asked if they could name it after me. I was delighted and told them, 'Thank you very much'.
"I'm absolutely flattered. This is a remarkable species the largest of its kind. I'm told it can catch rats then eat them with its digestive enzymes. It's certainly capable of that." Telegraph UK
A carnivorous pitcher plant that eats rats and insects has been discovered in the Philippines and named after Sir David Attenborough.
By Chris Irvine
Published: 11:52AM BST 17 Aug 2009
Rat-eating plant: The team of botanists, led by British experts Stewart McPherson and Alastair Robinson, found the plant on Mount Victoria in the Philippines. Photo: STEWART MCPHERSON
The plant is among the largest of all pitchers and is believed to be the largest meat-eating shrub, dissolving rats with acid-like enzymes.
The team of botanists, led by British experts Stewart McPherson and Alastair Robinson, found the plant on Mount Victoria in the Philippines.
They were inspired to search for the plant after word that it is existed came from two Christian missionaries who described seeing a large carnivorous pitcher in 2000 after they climbed the mountain.
Mr McPherson, of Poole Dorset, said: "The plant produces spectacular traps which catch not only insects, but also rodents. It is remarkable that it remained undiscovered until the 21st century."
The team, which found the plant in 2007 following a two-month expedition, published details of their discovery in the Botanical Journal of Linnean Society earlier this year following a three-year study of all 120 species of pitcher plant.
They decided to name the plant Nepenthes attenboroughii, after the wildlife broadcaster Sir David.
"My team and I named it in honour of Sir David whose work has inspired generations toward a better understanding of the beauty and diversity of the natural world," added Mr McPherson.
Sir David, 83, said: "I was contacted by the team shortly after the discovery and they asked if they could name it after me. I was delighted and told them, 'Thank you very much'.
"I'm absolutely flattered. This is a remarkable species the largest of its kind. I'm told it can catch rats then eat them with its digestive enzymes. It's certainly capable of that." Telegraph UK
Sunday, August 2, 2009
Wednesday, May 27, 2009
Sunday, March 29, 2009
Saturday, March 28, 2009
BBC.Weird.Nature.
Devious.Defences
Bizarre Breeding
Fantastic.Feeding
Peculiar Potions
Puzzling Partners
Bizarre Breeding
Fantastic.Feeding
Peculiar Potions
Puzzling Partners
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