Israel kills top Hezbollah figure in Beirut strike, Reuters sources say
Top Hezbollah commander Ibrahim Aqil was killed on Friday in an Israeli strike on Beirut's southern suburbs, two security sources told Reuters.
The cause of mysterious mass deaths of African elephants has finally been unravelled — and scientists who authored a new report say that the outbreaks could be more likely to occur amid conditions created by the ongoing climate crisis.
Thirty-five African elephants in northwestern Zimbabwe dropped dead under baffling circumstances between late August and November 2020. Eleven of the massive herd animals died within a 24-hour period.
“They died over a very narrow window. That’s one of the most enigmatic parts of the whole puzzle. That many animals dying quite close together but not right next to each other over such a narrow space of time. It’s really to my mind, rather unique, certainly in this part of the world,” said Dr. Chris Foggin, a veterinarian at Victoria Falls Wildlife Trust in Zimbabwe, who is a coauthor of the study on the cause of the deaths.
Earlier that same year, about 350 elephants in neighbouring northern Botswana also had died suddenly over the course of three months.
Officials and experts were initially at a loss to explain the die-offs, which occurred among Africa’s biggest population of elephants. Poaching, poisoning and drought were all blamed.
It turns out a bacterial infection killed the elephants, according to the research based on samples taken from 15 of the animals that died in Zimbabwe.
An analysis, , showed evidence of infection by a little-known bacterium called Bisgaard taxon 45 that caused septicemia, or blood poisoning.
The deaths took place as food and water resources dwindled during the dry season, forcing the elephants to travel increasing distances to look for water and to forage.
The authors said that heat, drought and population density in that area were likely contributing factors to the outbreak.
And the extreme conditions that scientists project will occur with more frequency as Earth warms could mean more elephant deaths in the future.
“It’s premature to say that climate change has influenced (this) but it may do so in future if we get more and prolonged droughts, or the rainfall patterns (change) and we have a much harsher dry season,” Foggin said. “I do think that if that is the case, then we are more likely to see this sort of mortality event occurring again.”
The elephant mortalities in Botswana have been attributed to cyanobacterial neurotoxins, but further details have not been published, the study noted. Foggin said there was no proven connection between the Zimbabwe and Botswana elephant deaths.
The African elephant is a flagship species that faces significant pressure from poaching and habitat loss. Listed as endangered on the International Union for Conservation of Nature Red List, population numbers diminished by 144,000 to about 350,000 between 2007 and 2014, with continuing losses estimated at 8% every year, according to the study.
Some 227,900 elephants live in the Kavango–Zambezi Transfrontier Conservation Area — 500,000 square kilometres (193,051 square miles) of protected land, which is about 90% within Botswana and Zimbabwe.
Evidence of infection was found in six out of the 15 samples, the study authors wrote, which was corroborated by isolating the bacterium in the lab and in-depth genetic analysis.
There was no evidence of toxins, including those from cyanobacteria, or any viral infection.
In addition, no dead scavengers or other wildlife species were reported or observed in the vicinity of dead elephants as would be expected with cyanide or other intentional poisoning, the study noted.
“Although there was not culture or molecular evidence to confirm Bisgaard taxon 45 in more than six mortalities in Zimbabwe, the elephants examined were in good body condition and unlikely to have died of drought-related starvation or severe dehydration alone,” the study noted.
No elephants had their tusks removed from poaching, and no external signs of trauma were observed. Tests for anthrax were also negative, Foggin added.
The researchers said they failed to detect the bacteria in the other samples — a fact they attributed to poor sample quality and delays getting the necessary permits that meant it was too late to perform some lab work.
“Most carcasses were degraded at the time of sampling, making the initial sample quality poor. Additionally, exporting wildlife samples for analysis involves obtaining multiple permits from different entities — a process which can take months,” the study said.
Bisgaard taxon 45 has previously been associated with tiger and lion bite wounds in humans. The bacteria have also been found in a chipmunk and healthy captive parrots.
The microorganism, which does not have an official name, is closely related to another, more common bacterium known as of Pasteurella multocida, which can cause hemorrhagic septicemia in other animals, including Asian elephants.
That bacterium was also linked to the mass deaths of 200,000 critically endangered saiga antelope in Kazakhstan in 2015, the study noted.
Foggin said researchers had been monitoring wildlife in the area for presence of the bacteria, but no further elephant deaths as a result of Bisgaard taxon 45 had been confirmed since 2020.
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