Spaceship Earth, Your Main Oxygen Systems Are Collapsing
Yes, Houston, we have a problem: Our oceans are dying.
As the brilliant futurist Buckminster Fuller used to point out, our Spaceship Earth is hurtling through space at a great speed.
Imagine if someone told you (a passenger on that ship) that the main oxygen systems were failing because of how food was being grown.
What would you do upon receiving that dire warning? Perhaps work to make a change? Lobby the ship's captain? Maybe you'd simply deny that there was any such connection and keep going about your busy life.
But an imminent loss of oxygen just happens to be a current fact, because the ocean's phytoplankton (which provides two-thirds of the planet's oxygen) is rapidly dying off. Industrial agriculture not only contaminates our oceans with pesticide and nitrogen-fertilizer runoff, leading to massive dead zones; it is stripping our soils of carbon, which ends up in the oceans and creates acidification. At the current trajectory, in just a few decades there won't be much left alive in our oceans as the phytoplankton dies—all because of how we grow our food.
When climate change is discussed, the media, our governments and the climate movement are focused on the "evil" carbon in the atmosphere and the melting of the Arctic region. They're pleading with governments and Fortune 1000 firms to stop conducting "Drill, baby, drill" operations. Important stuff for sure, but lost in this debate of how much oceans will rise or how hot the planet will be in 2100 is a very sobering fact. If we don't immediately deal with the number one enviro issue of the day, ocean acidification, humanity will not be around in 2100 to observe rising temperatures or oceans lapping over Wall Street and Silicon Valley.
The good news is that we can cool both the planet and the seawater, while removing excess carbon from the sea, by regenerative agriculture—a solution literally under our feet!
The Regenerative Agriculture Initiative at California State University, Chico, and the Carbon Underground group have created this concise definition:
"Regenerative Agriculture describes farming and grazing practices that, among other benefits, reverse climate change by rebuilding soil organic matter and restoring degraded soil biodiversity —resulting in both carbon drawdown and improving the water cycle."
The little-known facts are that (a) industrial agriculture contributes more to climate change than Chevron, Exxon and the entire transportation industry combined and (b) regenerative agriculture can reverse climate change if we shift our society's focus from degeneration to regeneration. If we can put men on the Moon, can we shift how we grow food in way that supports life on Spaceship Earth?
Designer William McDonough recent article, Carbon is not the Enemy, in the journal Nature states:
"But carbon—the element—is not the enemy. In the right place, carbon is a resource and a tool."
Don Wilkin of the Soil and Water Conservation District in McHenry-Lake County, Illinois, outlines how to transform farming in his white paper, The New CRP: Restoring the Nation's Depleted Farmland through Carbon Farming.
Also, worth reading is Kristen Ohlson's, This Kansas farmer fought a government program to keep his farm sustainable, to see why we must change the way we incentivize farmers.
As I explained in my Nov. 18, 2015 EcoWatch article, Soils and Oceans Omitted from the Paris COP21 Agenda:
In this age of fascination with high technology, we choose to ignore the earthworm (tiller of the soil) and ocean plankton (our indispensable oxygen generator) at our peril. Did you know that two out of every three breaths you take come via phytoplankton? Relying primarily on solar, wind, and hybrids as the solutions to climate change is a path toward disaster.
The good news is that we can help heal our acidic oceans, moderate the planet's erratic weather, and produce abundant food by refocusing on soil sequestration (which, as a bonus, improves not just soil quality but also water-holding capacity) across farmlands, rangelands and forestlands.
Living in a Biological World
Paying attention to the health of our soils and oceans is now a matter of life and death. That may come as shock to most Americans, as our media and educational systems teach us many things—except how the Earth works. We can learn how to be a doctor (except that most physicians forget nutrition) or a carpenter (but they forget how forests grow) or a farmer (except that they forget the importance of soil health and earthworms) or an urban planner (but they forget how to conserve water). Our American hyper-specialization has yielded technocrats who don't understand the laws of nature.
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By Jacob L. Steenwyk and Antonis Rokas
From the mythical minotaur to the mule, creatures created from merging two or more distinct organisms – hybrids – have played defining roles in human history and culture. However, not all hybrids are as fantastic as the minotaur or as dependable as the mule; in fact, some of them cause human diseases.
When Looking Through a Microscope Isn’t Close Enough.<p>For the last few years, <a href="http://www.rokaslab.org/" target="_blank">our team at Vanderbilt University</a>, <a href="https://www.researchgate.net/lab/Gustavo-Goldman-Lab" target="_blank">Gustavo Goldman's team at São Paulo University in Brazil</a> and many other collaborators around the world have been collecting samples of fungi from patients infected with different species of <em>Aspergillus</em> molds. One of the species we are particularly interested in is <a href="https://doi.org/10.1006/rwgn.2001.0082" target="_blank"><em>Aspergillus nidulans</em>, a relatively common and generally harmless fungus</a>. Clinical laboratories typically identify the species of <em>Aspergillus</em> causing the infection by examining cultures of the fungi under the microscope. The problem with this approach is that very closely related species of <em>Aspergillus</em> tend to look very similar in their broad morphology or physical appearance when viewing them through a microscope.</p><p>Interested in examining the varying abilities of different <em>A. nidulans</em> strains to cause disease, we decided to analyze their total genetic content, or genomes. What we saw came as a total surprise. We had not collected <em>A. nidulans</em> but <em>Aspergillus latus</em>, a close relative of <em>A. nidulans</em> and, as we were to soon find out, <a href="https://doi.org/10.1016/j.cub.2020.04.071" target="_blank">a hybrid species that evolved through the fusion of the genomes</a> of two other <em>Aspergillus</em> species: <em>Aspergillus spinulosporus</em> and an unknown close relative of <em>Aspergillus quadrilineatus</em>. Thus, we realized not only that these patients harbored infections from an entirely different species than we thought they were, but also that this species was the first ever <em>Aspergillus</em> hybrid known to cause human infections.</p>
Several Different Fungal Hybrids Cause Human Disease.<p>Hybrid fungi that can cause infections in humans are well known to occur in several different lineages of single-celled fungi known as yeasts. Notable examples include multiple different species of <a href="https://doi.org/10.1002/yea.3242" target="_blank">yeast hybrids</a> that cause the human diseases <a href="https://rarediseases.info.nih.gov/diseases/6218/cryptococcosis" target="_blank">cryptococcosis</a> and <a href="https://www.cdc.gov/fungal/diseases/candidiasis/index.html" target="_blank">candidiasis</a>. Although pathogenic yeast hybrids are well known, our discovery that the <em>A. latus</em> pathogen is a hybrid is a first for molds that cause disease in humans.</p>
(Left) Candida yeasts live on parts of the human body. Imbalance of microbes on the body can allow these yeasts, some of which are hybrids, to grow and cause infection. (Right) Cryptococcus yeasts, including ones that are hybrids, can cause life-threatening infections in primarily immunocompromised people. Centers for Disease Control and Prevention<p><a href="https://doi.org/10.1371/journal.ppat.1008315" target="_blank">Why certain <em>Aspergillus</em> species are so deadly</a> while others are harmless remains unknown. This may in part be because <a href="https://doi.org/10.1016/j.fbr.2007.02.007" target="_blank">combinations of traits, rather than individual traits</a>, underlie organisms' ability to cause disease. So why then are hybrids frequently associated with human disease? Hybrids inherit genetic material from both parents, which may result in new combinations of traits. This may make them more similar to one parent in some of their characteristics, reflect both parents in others or may differ from both in the rest. It is precisely this mix and match of traits that hybrids have inherited from their parental species that <a href="https://www.nytimes.com/2010/09/14/science/14creatures.html" target="_blank">facilitates their evolutionary success</a>, including their ability to cause disease.</p>
The Evolutionary Origin of an Aspergillus Hybrid.<p>Multiple evolutionary paths can lead to the emergence of hybrids. One path is through mating, just as the horse and donkey mate to create a mule. Another path is through the merging or fusion of genetic material from cells of different species.</p><p>It is this second path that appears to have been taken by our fungus. <em>A. latus</em> appears to have two of almost everything compared to its parental species: twice the genome size, twice the total number of genes and so on. But unlike other hybrids, which are often sterile like the mule, we found that <em>A. latus</em> is capable of reproducing both asexually and sexually.</p><p>But how distinct were the parents of <em>A. latus</em>? By comparing the parts contributed by each parent in the <em>A. latus</em> genome, we estimate that its parents are approximately 93% genetically similar, which is about as related as we humans are with lemurs. In other words, <em>A. latus</em>, an agent of infectious disease, is the fungal equivalent of a human-lemur hybrid.</p>
How A. Latus Differs From its Parents.<p>Elucidating the identity of closely related fungal pathogens and how they differ from each other in infection-relevant characteristics is a key step toward reducing the burden of fungal disease. For example, we found that <em>A. latus</em> was three times more resistant than <em>A. nidulans</em>, the species it was originally identified as using microscopy-based methods, to one of the most common antifungal drugs, <a href="https://www.drugbank.ca/drugs/DB00520" target="_blank">caspofungin</a>. This result provides a clear example of the potential importance of accurate identification of the <em>Aspergillus</em> pathogen causing an infection.</p><p>We also examined how <em>A. latus</em> and <em>A. nidulans</em> interact with cells from our immune system. We found that immune cells were less efficient at combating <em>A. latus</em> compared to <em>A. nidulans</em>, suggesting the hybrid fungus may be trickier for our immune systems to identify and destroy.</p><p>In the midst of the COVID-19 pandemic, our quest to understand <em>Aspergillus</em> pathogens is becoming more urgent. Growing evidence suggests that <a href="https://doi.org/10.1111/myc.13096" target="_blank">a fraction of COVID-19 patients are also infected with <em>Aspergillus</em>.</a> More worrying is that these <a href="https://doi.org/10.3201/eid2607.201603" target="_blank">secondary <em>Aspergillus</em> infections</a> can worsen the clinical outcomes for those infected with the novel coronavirus. That being said, we stress that little is known about <em>Aspergillus</em> infections in COVID-19 patients due to a lack of systematic testing, and none of the infections identified so far appear to have been caused by hybrids.</p><p>So, when it comes to hybrids, some are fantastic (the minotaur), some are helpful (the mule) and some are dangerous (<em>Aspergillus latus</em>). Understanding more about the biology of <em>Aspergillus latus</em> may help in our understanding of how microbial pathogens arise and how to best prevent and combat their infections.</p>
This Saturday, June 6, marks National Trails Day, an annual celebration of the remarkable recreational, scenic and hiking trails that crisscross parks nationwide. The event, which started in 1993, honors the National Trail System and calls for volunteers to help with trail maintenance in parks across the country.
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By John Letzing
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The Navajo Nation covers the corners of three different states. Google Maps
Growing Contribution<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzM3NDY5Ny9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY0NjM4MTgyM30.IuQTKQs1stvYYKD6vaVTrqAyoBsUG0BhDvlhxsyKwPA/img.png?width=980" id="02a05" class="rm-shortcode" data-rm-shortcode-id="2841f82b1785df5d5ed7bf64d3bb882b" data-rm-shortcode-name="rebelmouse-image" />
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Scuba divers around the world are holding their metaphorical breath to see if a coronavirus infection affects the ability to dive.
DAN medical experts explained the difference between normal lungs, on the left, and "very serious lungs caused by COVID-19," on the right. Matias Nochetto / Divers Alert Network (DAN)
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