Gleanings of the Week Ending November 16, 2024

The items below were ‘the cream’ of the articles and websites I found this past week. Click on the light green text to look at the article.

Drought Expands Across the U.S. – We are finally getting some rain…but we are in the ‘extreme drought’ area of southwestern Missouri; it is going to take a lot to get back to ‘normal.’ On October 29, abnormal dryness and drought affected over 78 percent of the American population—the highest percentage in the U.S. Drought Monitor’s 25-year-long record.

Cholera, Zika and West Nile: The deadly diseases that sweep in after hurricanes – Damage to infrastructure has been the big focus of reporting in the US, but diseases are ramping up.

  • Florida health authorities released a warning in early October of a likely spike in Vibrio vulnificus infections, urging residents to avoid wading in floodwaters.  Vibrio vulnificus is a bacteria which can cause the breakdown of skin and soft tissue, sometimes leading to amputations.

  • West Nile cases rose in Louisiana and Mississippi following Hurricane Katrina.

  • Studies found that flooding in Louisiana following hurricanes Rita and Katrina led to an increase in the airborne fungi Penicillium and Aspergillus, which can cause allergies, respiratory infections and pneumonia.

  • Research into the aftermath of hurricanes Maria, Irma and Michael, shows that a significant number of people in Florida developed new chronic health conditions such as asthma and allergies in the six months following the disasters.

Satellite Imagery Shows Breadth of Flooding in Spain - Valencia saw a year’s worth of rainfall in just eight hours, with floods destroying buildings, disrupting trains, and leaving more than 100,000 homes without power.

What animal societies can teach us about aging - Humans are not the only animals to change our social behavior as we age. Red deer may become less sociable as they grow old to reduce the risk of picking up diseases, while older house sparrows seem to have fewer social interactions as their peers die off.

The world’s oldest tree? Genetic analysis traces evolution of iconic Pando forest - By sequencing hundreds of samples from the tree, researchers confirmed that Pando, a quaking aspen tree (Populus tremuloides) in Utah, is between 16,000 and 80,000 years old. Pando consists of some 47,000 stems that cover an area of 42.6 hectares in Utah’s Fishlake National Forest. Because of the way the plant reproduces, this collection of aspens is technically all one tree, supported by a single, vast root system. Pando is triploid, meaning that its cells contain three copies of each chromosome, rather than two. As a result, Pando cannot reproduce sexually and mix its DNA with that of other trees, and instead creates clones of itself.

Have we found all the major Maya cities? Not even close – Using lidar to survey 50 square miles revealed evidence of more than 6,500 pre-Hispanic structures, including a previously unknown large city complete with iconic stone pyramids.

Stunning Shortlisted Photos From the 2024 Close-Up Photographer of the Year Contest – My favorite was “Chicory” for the color…and that I knew what it was!

Low-level lead poisoning is still pervasive in the US and globally - Chronic, low-level lead poisoning is a major risk factor for cardiovascular disease in adults and cognitive deficits in children. Factors such as menopause and hyperthyroidism release lead sequestered in the skeleton, which causes a spike in blood lead concentrations. The solution to protecting people from lead poisoning is to identify and eliminate environmental sources of lead: eliminating lead acid batteries, replacing lead service lines, banning leaded aviation fuel, reducing lead in foods, abating lead paint in older housing, and further reducing lead-contaminated soil and other legacy sources.

Ghost Forests Creep Into North Carolina - Large swaths of cypress and pine forests along the southeast Atlantic coast have died, shed their bark, and become pale, leafless snags that line the waterways like gravestones. In the period before winds topple the snags over and shrubs cover them up, researchers call the eerie ecosystems “ghost forests.” One place that is it happening is Alligator River National Wildlife Refuge…and I realized I have been there! We visited in April of 2015. It was the first place I saw river otters and two vultures (different species) sharing a meal. There probably were bald cypress dying in 2015, but it is even more evident now.

Trees cool better than reflective roofs in vulnerable Houston neighborhoods - Heat islands occur in cities where structures such as buildings and roads absorb the sun's heat more than natural landscapes such as trees and grass. The researchers considered three different heat island mitigation strategies: painting roofs white to increase solar reflectance; planting vegetation on roofs to increase evaporation through the plants; and planting more trees, which increases evaporation and provides shade.

Gleanings of the Week Ending November 4, 2023

The items below were ‘the cream’ of the articles and websites I found this past week. Click on the light green text to look at the article.

Oldest fossil human footprints in North America confirmed – New research that supports the dating of the footprints found in White Sands National Park to between 21,000 and 23,000 years old.

Downtown Dallas Gets a New Park – Harwood Park. It reminded me of a field trip with my parents – taking the light rail train from Carrollton to downtown Dallas to visit Klyde Warren Park and have lunch in 2014. I’m glad there is another park added to the downtown area.

BLM Releases New Plan for Moab Area - The plan limits motorized recreation to protect natural and cultural resources. I hope the BLM can succeed in reducing the impact of off road vehicles….requiring ORV users/organizations to take precautions to protect the environment for themselves and everyone else to enjoy in this area.

Active children are more resilient – Interesting….I’ve assumed this but the way the researches went about confirming the idea was worth knowing and reassuring.

A Road Trip Along the Northern Shore of Lake Superior – The Trans-Canada Highway from Thunder Bay to Marathon in June. Maybe a place we’ll go one summer?

What your hands say about your health – I wish the article had better pictures!

Trouble in the Amazon - In the southeastern Amazon, the forest has become a source of CO2….and maybe more will cease to be a carbon sink as well. Large-scale deforestation… plus even intact forest is no longer as healthy as it once was, because of forces such as climate change and the impacts of agriculture that spill beyond farm borders. Data has been collected every two weeks for 10 years! The selective logging permitted by the Forest Code in Brazil is often not sustainable. That’s because the trees that are removed are generally slow-growing species with dense wood, whereas the species that grow back have less-dense wood, so they absorb less carbon in the same space.

A Summer Light Show Dims: Why Are Fireflies Disappearing? – Habitat destruction (clear cutting, fragmentation of forests), water pollution (in Asia many firefly larvae are aquatic), pesticides and yard chemicals, light pollution (it blinds males so that they can’t find females). On a positive note: firefly ecotourism is increasing in Mexico and Malaysia….and around Great Smokey Mountains National Park in the US.

Large herbivores keep invasive plants at bay - Native plants have evolved such that they can withstand brutal treatment from species of herbivores they have co-existed with for millennia, while invasive plants usually cannot.

The Amazon May Be Hiding More Than 10,000 Pre-Columbian Structures - Based on a new aerial survey and modeling study, archaeologists suggest at least 90 percent of sites known as earthworks remain undetected. Also found - high concentrations of 53 domesticated tree species near earthwork sites. These include cacao, Brazil nut, breadnut and Pará rubber trees, plus dozens of others. This demonstrates how the region’s inhabitants altered the natural landscape, likely so they would have a steady supply of food and useful materials.

Gleanings of the Week Ending July 1, 2023

The items below were ‘the cream’ of the articles and websites I found this past week. Click on the light green text to look at the article.

How technology helped archaeologists dig deeper – Tools that tell us a lot more than excavation can: chemical and genetic analysis, lidar. This article uses new archaeological data from several cities (New York, Cahokia, Rome, Pompei, Angkor Wat)…pointing out that new analyses reveal that they were often full of immigrants that built the city and there were places those people lived nearby that often were not noticed by excavators! Archaeology is now able to tell us more about how ordinary people lived – not just the elite.

The white roofs cooling women's homes in Indian slums – Maybe white roofs will become a trend in lots of places…reduce the heat island effect that cities must struggle to overcome as the planet gets warmer.

Vienna is the most livable city in the world – It has stability, robust health care and education systems and strong infrastructure, among other factors. There are no cities in the US in the top 10; Honolulu, Hawaii is 25th on the list and the top city located in the US. There are 3 in the top 10 located in Canada: Vancouver, Calgary, and Toronto. 

That's no pizza: A wall painting found in Pompeii doesn't depict Italy's iconic dish – Tomatoes and mozzarella were not available 2,000 years ago when the fresco was created! Tomatoes came from the Americas a few centuries ago and mozzarella was invented in Naples in the 1700s.

This Ancient Maya City Was Hidden in the Jungle for More Than 1,000 Years – Found during a survey with light detection and ranging (lidar) scans in the Balamku ecological reserve on the Yucatan Peninsula. The site is on high ground surrounded by extensive wetlands. The ruins have been named Ocotun (‘stone column’ in Yucatec Mayan) in honor of the many columns found at the site.

Is fast fashion making us sick? – Fashion can be rife with toxic chemicals such as formaldehyde and chromium…and the US has done little to protect consumers from these toxins in clothes. Researchers are correlating declining fertility rate and the rise in autoimmune diagnoses in the US with chemicals found in our clothes.

Winners of the 2023 Audubon Photography Awards Celebrate the Beauty of Birds – Eye candy images of the natural world.

Surgeons must tackle three global health challenges to save lives – Assuming that a new device or approach is always better - not a good assumption but a common one that surgeon make!

The perilous life of the solitary pangolin – Learn about this African animal…their situation in the wild…and how things have changed over the past decade.

Winners of the 2023 BigPicture Natural World Photography Competition embrace our world’s biodiversity – Images telling stories.