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Bacteria in Botswana's Water Is Likely Cause of Mass Elephant Deaths
Toxins in water produced by cyanobacteria was likely responsible for more than 300 elephant deaths in Botswana this year, the country's wildlife department announced on Monday.
Elephants mysteriously started dying in the country's vast inland Okavango Delta from March this year, alarming conservationists and sparking an investigation. Some 330 elephants have died in the region.
Officials ruled out killing by poachers who hunt elephants for their ivory, because they died with their tusks intact. They also ruled out anthrax poisoning.
How Did Cyanobacteria Poison the Elephants?
Cyanobacteria are microscopic organisms common in water and sometimes found in soil. Some cyanobacteria produce neurotoxins.
The cyanobacteria "was growing in pans" or watering holes, the principal veterinary officer of the Department of Wildlife and National Parks, Mmadi Reuben, told reporters.
Reuben said the deaths had "stopped towards the end of June 2020, coinciding with the drying of pans."
"However we have many questions still to be answered such as why the elephants only and why that area only? We have a number of hypotheses we are investigating," added Reuben.
Similar elephant deaths have also been recorded in neighboring Zimbabwe.
Climate Change to Blame?
Not all cyanobacteria are toxic but scientists say varieties dangerous to humans and animals are occurring more frequently as climate change drives up global temperatures.
Southern Africa's temperatures are rising at twice the global average, according to the Intergovernmental Panel on Climate Change.
Africa's overall elephant population is declining due to poaching. But Botswana, home to almost a third of the continent's elephants, has seen numbers grow to around 130,000.
Botswana's government said it was continuing studies into the occurrence of the deadly bacteria. In the winter, elephants hydrate themselves mainly by eating roots and bark, especially of the baobab tree.
Reposted with permission from Deutsche Welle.
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Trump Calls Fauci 'a Disaster,' Tries to Blame Science and Medical Experts for Failed Coronavirus Response
President Trump attacked the nation's top infectious disease specialist in a call with campaign staffers that several reporters were allowed to listen to on Monday. In the call, Trump said that Dr. Anthony S. Fauci was "a disaster." He added that despite the evidence that coronavirus cases are once again rising across the country, the public was tired of hearing so much news about the virus, especially from "these idiots" in the government and scientific community, as The Washington Post reported.
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By Rebecca Niemiec and Kevin Crooks
Colorado voters will decide on Nov. 3 whether the state should reintroduce gray wolves (Canis lupus) after a nearly 80-year absence. Ballot Proposition 114 would require the state to develop and oversee a science-based plan to restore wolves, focused in Western Colorado and initiated by the end of 2023.
Back by Popular Demand?<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDUzOTQxNy9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYwNzI4NTkyMX0.BeRR61CH6a-TWwSw1p4kmng4x4tXRaSMKyTRHKIHmOw/img.jpg?width=980" id="1f7fe" class="rm-shortcode" data-rm-shortcode-id="339e3443dc63f3be06e24a82f0b37a03" data-rm-shortcode-name="rebelmouse-image" />
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Clashing Values<p>Proposition 114 has strong support in Colorado. <a href="https://extension.colostate.edu/topic-areas/people-predators/public-perspectives-on-wolves-and-wolf-reintroduction-8-004/" target="_blank">Statewide surveys </a> conducted by phone, by mail and online over the past two decades have found that 66% to 84% of respondents supported reintroducing wolves. This support is consistent across different regions of the state and diverse demographic groups.</p><p>In a <a href="https://doi.org/10.7717/peerj.9074" target="_blank">survey of Colorado residents</a> that we conducted in 2019, the prospect that wolves could contribute to a balanced ecosystem was the most commonly cited reason for supporting reintroduction. Other arguments included people's cultural and emotional connections to wolves, and <a href="https://extension.colostate.edu/topic-areas/people-predators/moral-arguments-related-to-wolf-restoration-and-management-8-011/" target="_blank" rel="noopener noreferrer">moral arguments</a> that restoring a species humans had eradicated was the right thing to do.</p><p>While overall public support is strong, over half of Colorado's 64 counties have passed <a href="https://www.drovers.com/article/wolf-reintroduction-ballot-colorado" target="_blank" rel="noopener noreferrer">resolutions against restoring wolves</a>. Many ranching and hunting associations are actively campaigning against the ballot measure.</p><p>In our 2019 study, we found that media coverage in the state focused more strongly on <a href="https://doi.org/10.7717/peerj.9074" target="_blank" rel="noopener noreferrer">perceived negative impacts</a> associated with wolf reintroduction than on beneficial effects. Surveys show that resident concerns include threats to <a href="https://extension.colostate.edu/topic-areas/people-predators/wolves-and-human-safety-8-003/" target="_blank" rel="noopener noreferrer">human safety and pets</a>; <a href="https://extension.colostate.edu/topic-areas/people-predators/wolves-and-livestock-8-010/" target="_blank" rel="noopener noreferrer">wolf attacks on livestock</a>; and the potential for wolves to <a href="https://extension.colostate.edu/topic-areas/people-predators/wolves-big-game-and-hunting-8-001/" target="_blank" rel="noopener noreferrer">reduce deer and elk populations</a>, threatening hunting opportunities.</p>
Who Decides?<p>This measure is the first giving voters in the U.S. an opportunity to weigh in on bringing back a native species. Addressing the issue through a ballot measure adds a unique twist to public and media discussions about wolves.</p><p>Supporters call it a democratic way to ensure that the <a href="https://www.cpr.org/2020/09/29/should-wolves-be-brought-back-to-colorado-a-rancher-and-a-biologist-have-their-say/" target="_blank">public's values are recognized</a>. They also argue that voters are deciding only whether wolves should be reintroduced, while allowing experts at the <a href="https://cpw.state.co.us/" target="_blank" rel="noopener noreferrer">state wildlife agency</a> to create a reintroduction plan <a href="https://www.steamboatpilot.com/news/election/howl-you-vote-wolf-advocates-opponents-ask-colorado/" target="_blank" rel="noopener noreferrer">based on the best available science</a>.</p>
<div id="4c11f" class="rm-shortcode" data-rm-shortcode-id="dec8674441e02372e50b796d848e4130"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1316474105315483649" data-partner="rebelmouse"><div style="margin:1em 0">According to a recent poll of 900 demographically representative likely voters, two-thirds supported “restoring wol… https://t.co/74LMG1PYtW</div> — High Country News (@High Country News)<a href="https://twitter.com/highcountrynews/statuses/1316474105315483649">1602706860.0</a></blockquote></div>
Finding Consensus<p>Studies suggest that ballot initiatives like 114 will <a href="https://doi.org/10.1016/j.biocon.2017.07.032" target="_blank">become more common</a> as public values toward wildlife change and more diverse groups seek to influence wildlife management. For us, the key question is how to recognize and incorporate these differing values as agencies make decisions.</p><p>Research drawing on insights from <a href="https://extension.colostate.edu/topic-areas/people-predators/dialogue-and-social-conflict-about-wolves-8-009/" target="_blank">psychology, political science and sociology</a> suggests that it is critical to run<a href="https://drive.google.com/file/d/1QppmBszEF6zsNnhBJ7Q2-pSWRR-Zx_ln/view" target="_blank" rel="noopener noreferrer"> truly participatory processes</a> that engage government agencies and people who have a stake in the issue in shared decision-making. Fostering dialogue between groups that value wildlife differently can build empathy and mutual understanding and <a href="https://doi.org/10.1016/j.biocon.2014.07.015" target="_blank" rel="noopener noreferrer">foster compromise</a>. Broadening the conversation in this way is essential for coexisting with carnivores with minimal impacts on predators and people.</p>
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By Brian Bienkowski
Fish exposed to endocrine-disrupting compounds pass on health problems to future generations, including deformities, reduced survival, and reproductive problems, according to a new study.
Low Levels Lead to Generational Impacts<p>Researchers exposed inland silverside fish to bifenthrin, levonorgestrel, ethinylestradiol, and trenbolone to levels currently found in waterways.</p><p>"Our concentrations were actually on the low end" of what is found in the wild, DeCourten said, adding that it was low amounts of chemicals in parts per trillion.</p><p>Bifenthrin is a pesticide; levonorgestrel and ethinylestradiol are synthetic hormones used in birth controls; and trenbolone is a synthetic steroid often given to cattle to bulk them up.</p><p>Such endocrine-disruptors have already been linked to a variety of health problems in directly exposed fish including altered growth, reduced survival, lowered egg production, skewed sex ratios, and negative impacts to immune systems. But what remains less clear is how the exposure may impact future generations.</p><p>For their study, DeCourten and colleagues started the exposure when the fish were embryos and continued it for 21 days.</p><p>They then tracked effects on the exposed fish, and the next two generations.</p>
Inherited Problems<p>DeCourten said the altered DNA methylation is one of the plausible ways that future generations would experience health impacts from previous generations' exposure. Hormone-disrupting compounds have been shown to impact DNA methylation, which is an important marker of how an organism will develop.</p><p>"Methyl groups are added to specific sites on the genome, [the exposure] is not changing the genome itself, but rather how the genome is expressed," she said. "And that can be inherited throughout generations."</p><p>In addition, Brander said there are essentially different "tags" that exist on DNA molecules, which tell genes how to turn on and off. She said the exposure to different compounds may be "influencing which methyl tags get taken on or off as you proceed through generations."</p><p>The researchers said the study should prompt future toxics testing to consider impacts on future generations.</p><p>"The results … throw a wrench in the current approach to regulating chemicals, where it's often short-term testing looking at simple things like growth, survival, and maybe gene expression," Brander said.</p><p>"These findings are telling us we really at least need to consider" the next two generations, she added.</p>
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