U.S. Quietly Removes 17 Sites From UN Biosphere Reserve Network
The U.S. has quietly withdrawn 17 sites from the UNESCO World Network of Biosphere Reserves program.
As first reported by National Geographic, the sites include a number of national forests, preserves and reserves from Alaska to the Virgin Islands (see list below). There were previously 47 biosphere reserves in the U.S.
The move was made during the International Coordinating Council of the Man and the Biosphere Programme meeting in Paris this week. Bulgaria also removed three sites.
"Prior to this year, a total of 18 sites had been removed from the program since 1997, by seven countries," National Geographic noted.
"It's not currently clear why the U.S. and Bulgaria asked to remove those sites: requests for comment have not yet been returned. In the past, sites were removed after countries were no longer able to meet the requirements of the program for protecting them."
According to the United Nations, biosphere reserves are nominated by national governments and remain under the sovereign jurisdiction of the states where they are located.
As detailed by the conservation nonprofit George Wright Society, the biosphere program was launched in the 1970s to establish internationally designated protected areas, help minimize the loss of biological diversity, raise awareness on how cultural diversity and biological diversity affect each other, and promote environmental sustainability.
But over the years, the program has been criticized by certain individuals and groups as—per this Infowars post—a United Nations "land grab" of American landmarks.
The George Wright Society writes:
"A large, almost bewildering variety of charges have been alleged about biosphere reserves. Many of these charges revolve around a basic fear and distrust of the United Nations. This category of objections includes such claims as the United Nations is poised to invade the United States, confiscate American land, impose some kind of 'new world order'� on citizens here, and so forth. There is no truth whatsoever to these charges."
The U.S. removed the following sites from the biosphere reserve program:
- Aleutian Islands National Wildlife Refuge - US Fish & Wildlife Service
- Beaver Creek Experimental Watershed - US Forest Service
- California Coast Ranges - University of California Natural Reserve System
- Carolinian South-Atlantic - Non-Game and Heritage Trust (South Carolina)
- Central Plains Experimental Range - USDA Agricultural Research Service
- Coram Experimental Forest - US Forest Service
- Desert Experimental Range - US Forest Service
- Fraser Experimental Forest - US Forest Service
- H.J. Andrews Experimental Forest - US Forest Service / Oregon State University
- Hubbard Brook - US Forest Service
- Konza Prairie Research Natural Area - Kansas State University
- Land Between the Lakes - US Forest Service
- Niwot Ridge Mountain Research Station - University of Colorado
- Noatak National Preserve - National Park Service
- Stanislas-Tuolumne Experimental Forest - US Forest Service
- Three Sisters Wilderness - US Forest Service
- Virgin Islands - National Park Service
The good news is that 23 new sites around the world were added to the network at the council meeting this week. These are the new designations, as detailed by UNESCO's official press release:
Mono Biosphere Reserve (Benin)—Located in the southwest of the country, this 9,462 ha site comprises ecosystems that include mangroves, wetlands, savannah and forests. It is home to notable biodiversity flagship species such as the dugong, or sea cows, hippos and two monkey species. Nearly 180,000 inhabitants live within the reserve, mostly from livestock and small scale farming of palm oil and coconuts, as well as fishing.
Mono Transboundary Biosphere Reserve (Benin/Togo)—Located in the southern parts of Benin and Togo, the 346,285 ha. site stretches over the alluvial plain, delta and coast of the Mono River. It brings together Benin's and Togo's national biosphere reserves of the same name and features a mosaic of landscapes and ecosystems, mangroves, savannahs, lagoons, and flood plains as well as forests, some of which are sacred. The biosphere reserve is home to some two million people, whose main activity is small-scale farming (palm oil and coconuts), livestock grazing, forestry and fishing.
Savegre Biosphere Reserve (Costa Rica)—This site is located on the central Pacific coast, 190 km from the capital, San José. This reserve has high biodiversity value, hosting 20% of the total flora of the country, 54% of its mammals and 59% of its birds. It has approximately 50,000 inhabitants, whose main activities are agriculture and livestock rearing. Crop production is significant in high altitude areas, including plantations of apple, pomegranate and avocado. During recent years, ecotourism has increased and has become a source of socio-economic growth in the region.
Moen Biosphere Reserve (Denmark)—This reserve consists of a series of islands and islets in the southern Baltic Sea, over approximately 45,118 ha. Its landscapes include woodlands, grasslands, meadows, wetlands, coastal areas, ponds and steep hills. This biosphere reserve includes a number of small villages, scattered farms and residential areas with a total population of some 45,806 inhabitants. The main activities are trade, agriculture, fishing and tourism.
La Selle - Jaragua-Bahoruco-Enriquillo Transboundary Biosphere Reserve (Dominican Republic / Haiti)—This biosphere reserve includes the reserves of La Selle in Haiti, designated in 2012, and Jaragua-Bahoruco in the Dominican Republic, designated in 2002. These two reserves represent ecological corridors divided by a political and administrative frontier. Bringing them together should allow better management of the environment.
Bosques de Paz Transboundary Biosphere Reserve (Ecuador/Peru)—Located in the southwest of Ecuador and in northwest of Peru, this site covers a total area of 1,616,988 ha. It includes territories of the western foothills of the Andes, with altitudes reaching up to 3,000 metres, which have generated a biodiversity with a high degree of endemism. The biosphere reserve includes the seasonally dry forests of Ecuador and Peru, which form the heart of the Endemic Region of Tumbes, one of the most important biodiversity hotspots of the world. This region has 59 endemic species, of which 14 are threatened. Most of its 617,000 inhabitants make a living from livestock and tourism.
Majang Forest Biosphere Reserve (Ethiopia)—Located in the west of the country, this biosphere reserve includes Afromontane forests in one of the most fragmented and threatened regions in the world. The landscape also includes several wetlands and marshes. At altitudes above 1,000 metres, vegetation chiefly consists of ferns and bamboo, while palm trees cover the lower areas. The biodiversity rich region is home to 550 higher plant species, 33 species of mammal and 130 species of birds alongside a human population of about 52,000.
Black Forest Biosphere Reserve (Germany)—Located in the south of the country, this biosphere reserve contains low mountain ranges, forests shaped by silviculture, lowland and mountain hay meadows and lowland moors. The total surface area of the site is 63,325 ha, 70% of which is forested. 38,000 inhabitants live in the area, which has preserved its traditions and maintain a significant craft industry. Sustainable tourism is widely encouraged.
San Marcos de Colón Biosphere Reserve (Honduras) – This site, which covers a surface area of 57,810 ha, is located some 12 km from the Nicaraguan border, at an altitude of 500 to 1700 metres. It is characterized by significant biodiversity and the presence of several endemic species of fauna. Eighteen villages are located on the site whose population numbers 26,350 inhabitants. Their principal activities include horticulture, fruit and coffee production, the growth of ornamental plants, cattle rearing and dairy production. The region is also known for its saddlery products (belts, harnesses, boots etc).
Tepilora, Rio Posada and Montalbo Biosphere Reserve (Italy)—Located in Sardinia, this biosphere reserve has a total surface area of over 140,000 ha, and presents mountainous areas to the west and a flat strip to the east, rivers and coastal areas. Around 50,000 people live on this site, which includes the Montalbo massif.
Sobo, Katamuki and Okue Biosphere Reserve (Japan)—This site, which is part of the Sobo-Katamuki-Okue mountain range, is characterized by precipitous mountains. Forests cover 85% of the 243,672 ha of the site, which is a hotspot of biodiversity in the region. The area has fewer than 100,000 inhabitants, whose livelihood comes from farming and exploiting forest resources, including wood production, shitake mushroom cultivation, and charcoal production.
Minakami Biosphere Reserve (Japan)—The site includes the central divide of the rivers of the island of Honshu formed by a 2,000 metre high backbone. Significant environmental differences between the eastern and western slopes, between mountainous and lowland areas create a distinct biological and cultural diversity. More than 21,000 people live in the reserve, which covers a total of 91,368 ha. Their main activities are agriculture and tourism.
Altyn Emel Biosphere Reserve (Kazakhstan)—This biosphere reserve covers the same areas as the Altyn Emel state national nature park, one of the country's protected areas, which is very important for the conservation of the region's biological diversity. It includes a large number of endemic plants. The site comprises deserts, riparian forests and floodplains of the Ili River, deciduous and spruce forests as well as salt marshes. The resident population of about 4,000 lives mainly from agriculture and cattle rearing as well as ecotourism and recreational tourism.
Karatau Biosphere Reserve (Kazakhstan)—Located in the central part of the Karatau ridgeway, a branch of Northwestern Tien Shan, one of the world's largest mountain ranges, the reserve covers a total surface area of 151,800 ha and is inhabited by 83,000 people. It is an extremely important natural complex for the conservation of West Tien Shan biodiversity. Karatau occupies first place among Central Asian regions in terms of its wealth of endemic species. The region's economy rests primarily on cattle rearing, agriculture, ecotourism and recreational tourism.
Indawgyi Biosphere Reserve (Myanmar)—Indawgyi Lake is the largest body of freshwater in Myanmar. With a total surface area of 133,715 ha, the site consists of a large open lake with floating vegetation areas, a swamp forest and seasonally flooded grasslands. The hills surrounding the lake are covered by subtropical moist broadleaf forests that harbour a number of threatened forest birds and mammals, including primates. The local population derives most of its income from farmlands bordering the lake.
Gadabedji Biosphere Reserve (Niger)—Located in the centre of the country, the site extends over an area of 1,413,625 ha. It comprises a mosaic of savannahs, depressions, pits and sand dunes. Its fauna includes mammals such as dorcas gazelle, pale fox, and golden jackal. The human population of the reserve belongs to two main ethnic groups, Touaregs and Peulhs, totalling close to 20,000 inhabitants, whose main activity is nomadic pastoralism.
Itaipu Biosphere Reserve (Paraguay)—Located in the east of the country, the reserve covers a surface area of over a million hectares. It comprises an area of semi-deciduous sub-tropical forest also known as the Upper Paraná Atlantic Forest. It is one of the most important ecosystems for the conservation of biological diversity on a global scale, due to its large number of endemic species, wealth of species and original cover. It is home to large predators such as harpies, jaguars, pumas and large herbivores such as tapirs. It has a permanent population of over 450,000 inhabitants.
Castro Verde Biosphere Reserve (Portugal)—Located in southern Portugal, in the hinterland of the Baixo Alentejo region, the biosphere reserve covers an area of almost 57,000 ha. It encompasses the most important cereal steppe area in Portugal, one of the most threatened rural landscapes in the Mediterranean region. It has a high degree of endemism in its flora. There is a bird community of some 200 species, including steppe birds such as the great bustard and endemic species such as the Iberian Imperial eagle, one of the most endangered birds of prey in the world. Some 7,200 inhabitants make a living from the extensive production of cereals and livestock rearing in the reserve.
Khakassky Biosphere Reserve (Russian Federation)—Located at the heart of the Eurasian continent and known for its rich biodiversity, more than 80 % of this biosphere reserve is covered by mountain-taiga. With a surface area of almost 2 million hectares, it is home to 5,500 permanent inhabitants. Sustainable forest management and agriculture, beekeeping and tourism are the main economic activities practised in the site.
Kizlyar Bay Biosphere Reserve (Russian Federation)—Kizlyar Bay is one of the largest bays in the Caspian Sea and one of the largest migratory routes for birds in Eurasia. It represents a diversity of marine, coastal and desert-steppe ecosystems, including populations of threatened animals, such as the Caspian seal, many species of birds and sturgeons. With a surface area of 354,100 ha, it has a permanent population of 1,600 inhabitants who depend on fishing, land use (grazing and haymaking), hunting and tourism.
Metsola Biosphere Reserve (Russian Federation)—Located at the border with Finland, the site comprises the Kostomukshsky reserve and contains one of the oldest intact north-taiga forests in Northwest Russia. Some 30,000 permanent inhabitants live in this biosphere reserve, with a surface area of 345,700 ha. The north-taiga forests are essential for the reproduction of many bird species. The local population lives from forestry, agriculture, fishing, hunting and gathering non-timber forest products.
Great Altay Transboundary Biosphere Reserve (Russian Federation / Republic of Kazakhstan)—The reserve is composed of the Katunskiy biosphere reserve (Russian Federation, designated in 2000) and the Katon-Karagay biosphere reserve (Kazakhstan, designated in 2014). With a surface area of over 1.5 million ha, the area is used for livestock rearing, grazing, red deer farming, fodder production and apiculture. Tourism, hunting, fishing, and the collection of non-timber forest products are also widespread.
Backo Podunavlje Biosphere Reserve (Serbia)—Located in the northwestern part of Serbia, this site, with a surface area of 176,635 ha, extends over the alluvial zones of the central Danube plain. It is composed of remnants of historic floodplains and human-made landscapes influenced by agriculture and human settlements. The floodplain includes alluvial forests, marshes, reed beds, freshwater habitats, alluvial wetlands, as well as flood-protected forests. The main activities of the 147,400 inhabitants are agriculture, forestry and industry.
Garden Route Biosphere Reserve (South Africa)—With a total area of 698,363 ha and a population of over 450,000, this site is part of the Cape Floristic Region biodiversity hotspot region. The Knysna estuary is of great importance for the conservation of this biodiversity. The eastern part of the biosphere reserve is characterised by the presence of wetlands in which farming practices and urban development could have a negative impact. Faunal diversity includes large mammals such as elephants, rhino and buffalo.
Jebel Al Dair Biosphere Reserve (Sudan)—This reserve is constituted of the Al Dair massif, composed of dry savannah woodlands, forested ecosystems and a network of streams. It is one of the last remaining areas with rich biodiversity in the semi-arid North Kordofan. The site numbers 112 plant species, most with medicinal and aromatic uses. There are also 220 bird species and 22 mammal and reptile species.
Mono Biosphere Reserve (Togo)—The site covering an area of 203,789 ha in the southeast of the country encompasses several coastal ecosystems—mangroves, wetlands, forests and flood plains, as well as farmlands used for small-scale production of palm oil and coconuts. There is also fishing and livestock rearing. The presence of sacred forests and isolated sacred trees is testimony to the vitality of the traditional cultural practices of the biosphere reserve's 1,835,000 inhabitants.
EcoWatch Daily Newsletter
By Alexander Richard Braczkowski, Christopher O'Bryan, Duan Biggs, and Raymond Jansen
A Cute But Threatened Species<p><a href="https://www.worldwildlife.org/stories/what-is-a-pangolin" target="_blank">Pangolins</a> are the only mammals wholly-covered in scales, which they use to protect themselves from predators. They can also curl up into a tight ball.</p><p>They eat mainly ants, termites and larvae which they pick up with their sticky tongue. They can grow up to 1m in length from nose to tail and are sometimes referred to as scaly anteaters.</p><p>But <a href="https://www.sciencedirect.com/science/article/pii/B9780128155073000332" title="Chapter 33 - Conservation strategies and priority actions for pangolins" target="_blank">all eight</a> pangolin species are classified as "<a href="https://www.pangolins.org/tag/endangered-species/" target="_blank">threatened</a>" under International Union for Conservation of Nature <a href="https://www.iucnredlist.org/search?query=pangolin&searchType=species" target="_blank">criteria</a>.</p><p>There is an unprecedented demand for their scales, primarily from countries in Asia and <a href="https://conbio.onlinelibrary.wiley.com/doi/10.1111/conl.12389" title="Assessing Africa‐Wide Pangolin Exploitation by Scaling Local Data" target="_blank">Africa</a> where they are used in food, cultural remedies and <a href="https://www.nature.com/articles/141072b0" title="Chinese Medicine and the Pangolin" target="_blank">medicine</a>.</p><p>Between 2017 and 2019, seizures of pangolin scales <a href="https://www.nationalgeographic.com/animals/2020/02/pangolin-scale-trade-shipments-growing/" target="_blank">tripled in volume</a>. In 2019 alone, 97 tons of pangolin scales, equivalent to about 150,000 animals, were <a href="https://oxpeckers.org/2020/03/nigeria-steps-up-for-pangolins/" target="_blank">reportedly</a> intercepted leaving Africa.</p>
Reintroduction of an Extinct Species<p>Each year in South Africa the African Pangolin Working Group (<a href="https://africanpangolin.org/" target="_blank">APWG</a>) retrieves between 20 and 40 pangolins through intelligence operations with security forces.</p><p>These pangolins are often-traumatised and injured and are admitted to the <a href="http://www.johannesburgwildlifevet.com/our-hospital" target="_blank">Johannesburg Wildlife Veterinary Hospital</a> for extensive medical treatment and rehabilitation before they can be considered for release.</p><p>In 2019, seven rescued Temminck's pangolins were reintroduced into South Africa's <a href="https://www.andbeyond.com/destinations/africa/south-africa/kwazulu-natal/phinda-private-game-reserve/" target="_blank">Phinda Private Game Reserve</a> in the KwaZulu Natal Province.</p><p>Nine months on, five have survived. This reintroduction is a world first for a region that last saw a viable population of this species in the 1980s.</p><p>During the release, every individual pangolin followed a strict regime. They needed to become familiar with their new surroundings and be able to forage efficiently.</p>
A ‘Soft Release’ in to the Wild<p>The process on Phinda game reserve involved a more gentle ease into re-wilding a population in a region that had not seen pangolins for many decades.</p><p>The soft release had two phases:</p><ol><li>a pre-release observational period</li><li>an intensive monitoring period post release employing GPS satellite as well as VHF tracking tags.</li></ol>
Why Pangolin Reintroduction is Important<p>We know so little about this group of mammals that are vastly understudied and hold many secrets yet to be discovered by science but are on the verge of collapse.</p><p>The South African and Phinda story is one of hope for the Temminck's pangolin where they once again roam the savanna hills and plains of Zululand.</p><p>The process of relocating these trade animals back into the wild has taken many turns, failures and tribulations but, the recipe of the "soft release" is working.</p>
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By Jake Johnson
In a move that environmentalists warned could further imperil hundreds of endangered species and a protected habitat for the sake of profit, President Donald Trump on Friday signed a proclamation rolling back an Obama-era order and opening nearly 5,000 square miles off the coast of New England to commercial fishing.
Why You Should Wash Fresh Produce<p>Global pandemic or not, properly washing fresh fruits and vegetables is a good habit to practice to minimize the ingestion of potentially harmful residues and germs.</p><p>Fresh produce is handled by numerous people before you purchase it from the grocery store or the farmers market. It's best to assume that not every hand that has touched fresh produce has been clean.</p><p>With all of the people constantly bustling through these environments, it's also safe to assume that much of the <a href="https://www.healthline.com/nutrition/fresh-vs-frozen-fruit-and-vegetables" target="_blank">fresh produce</a> you purchase has been coughed on, sneezed on, and breathed on as well.</p><p>Adequately washing fresh fruits and vegetables before you eat them can significantly reduce residues that may be left on them during their journey to your kitchen.</p><p><strong>Summary</strong></p><p><strong></strong>Washing fresh fruits and vegetables is a proven way to remove germs and unwanted residues from their surfaces before eating them.</p>
Best Produce Cleaning Methods<p>While rinsing fresh produce with water has long been the traditional method of preparing fruits and veggies before consumption, the current pandemic has many people wondering whether that's enough to really clean them.</p><p>Some people have advocated the use of soap, <a href="https://www.healthline.com/nutrition/white-vinegar" target="_blank">vinegar</a>, lemon juice, or even commercial cleaners like bleach as an added measure.</p><p>However, health and food safety experts, including the Food and Drug Administration (FDA) and Centers for Disease Control (CDC), strongly urge consumers not to take this advice and stick with plain water.</p><p>Using such substances may pose further health dangers, and they're unnecessary to remove the most harmful residues from produce. <a href="https://www.healthline.com/health/chlorine-poisoning" target="_blank">Ingesting commercial cleaning chemicals</a> like bleach can be lethal and should never be used to clean food.</p><p>Furthermore, substances like lemon juice, vinegar, and produce washes have not been shown to be any more effective at cleaning produce than plain water — and may even leave additional deposits on food.</p><p>While some research has suggested that using neutral electrolyzed water or a baking soda bath can be even more effective at removing certain substances, the consensus continues to be that cool tap water is sufficient in most cases.</p><p><strong>Summary</strong></p><p><strong></strong>The best way to wash fresh produce before eating it is with cool water. Using other substances is largely unnecessary. Plus they're often not as effective as water and gentle friction. Commercial cleaners should never be used on food.</p>
How to Wash Fruits and Vegetables With Water<p>Washing fresh fruits and vegetables in cool water before eating them is a good practice when it comes to health hygiene and food safety.</p><p>Note that fresh produce should not be washed until right before you're ready to eat it. Washing fruits and vegetables before storing them may create an environment in which bacterial growth is more likely.</p><p>Before you begin washing fresh produce, <a href="https://www.healthline.com/health/how-long-should-you-wash-your-hands" target="_blank">wash your hands well</a> with soap and water. Be sure that any utensils, sinks, and surfaces you're using to prepare your produce are also thoroughly cleaned first.</p><p>Begin by cutting away any bruised or visibly rotten areas of fresh produce. If you're handling a fruit or vegetable that'll be peeled, such as an orange, wash it before peeling it to prevent any surface bacteria from entering the flesh.</p><p>The general methods to wash produce are as follows:</p><ul><li><strong>Firm produce.</strong> Fruits with firmer skins like apples, lemons, and pears, as well as <a href="https://www.healthline.com/nutrition/root-vegetables" target="_blank">root vegetables</a> like potatoes, carrots, and turnips, can benefit from being brushed with a clean, soft bristle to better remove residues from their pores.</li><li><strong>Leafy greens.</strong> Spinach, lettuce, Swiss chard, leeks, and cruciferous vegetables like Brussels sprouts and bok choy should have their outermost layer removed, then be submerged in a bowl of cool water, swished, drained, and rinsed with fresh water.</li><li><strong>Delicate produce.</strong> Berries, mushrooms, and other types of produce that are more likely to fall apart can be cleaned with a steady stream of water and gentle friction using your fingers to remove grit.</li></ul><p>Once you have thoroughly rinsed your produce, dry it using a clean paper or cloth towel. More fragile produce can be laid out on the towel and gently patted or rolled around to dry them without damaging them.</p><p>Before consuming your fruits and veggies, follow the simple steps above to minimize the amount of germs and substances that may be on them.</p><p><strong>Summary</strong></p><p><strong></strong>Most fresh fruits and veggies can gently be scrubbed under cold running water (using a clean soft brush for those with firmer skins) and then dried. It can help to soak, drain, and rinse produce that has more dirt-trapping layers.</p>
The Bottom Line<p>Practicing good food hygiene is an important health habit. Washing fresh produce helps minimize surface germs and residues that could make you sick.</p><p>Recent fears during the <a href="https://www.healthline.com/coronavirus" target="_blank">COVID-19 pandemic</a> have caused many people to wonder whether more aggressive washing methods, such as using soap or commercial cleaners on fresh produce, are better.</p><p>Health professionals agree that this isn't recommended or necessary — and could even be dangerous. Most fruits and vegetables can be sufficiently cleaned with cool water and light friction right before eating them.</p><p>Produce that has more layers and surface area can be more thoroughly washed by swishing it in a bowl of cool water to remove dirt particles.</p><p>Fresh fruits and vegetables offer a number of healthy nutrients and should continue to be eaten, as long as safe cleaning methods are practiced.</p>
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By Danielle Nierenberg
Following the murder of George Floyd by police in Minneapolis, people around the United States are protesting racism, police brutality, inequality, and violence in their own communities. No matter your political affiliation, the violence by multiple police departments in this country is unacceptable.
Mangroves play a vital role in capturing carbon from the atmosphere. Mangrove forests are tremendous assets in the fight to stem the climate crisis. They store more carbon than a rainforest of the same size.
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Monday is World Oceans Day, but how can you celebrate our blue planet while social distancing?
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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>