Showing posts with label Environment. Show all posts
Showing posts with label Environment. Show all posts

Tuesday, May 13, 2025

Mr. and Mrs. Pi

We first met Mr. and Mrs. Pi on a crisp morning in March, the 14th of 2020. The air was in the low 50s (°F), and the patio was quiet save for the faint rustling of early spring. That’s when we saw them — two house finches busily at work beneath our retractable roof, weaving the foundations of a home in the corner nook of the patio.

Mr. Pi, caught red-beaked in the act, dropped a straw when he noticed me. He looked so startled — almost embarrassed — but endearingly so. Within days, they realized we meant no harm. The nest was completed with astonishing speed. Eggs were laid. Life quietly stirred. Then one day, wild little chicks emerged.

And one unforgettable moment - on April 18 - I captured a photo of a brave young finch flying the coop. He landed on the patio railing, looking around with wide eyes — wonderstruck. The world was big. So much to explore. And just like that, he took off into the yard — into life. 

As one brood fledged and fluttered off into the world, Mrs. Pi had already begun constructing the next nest. Mr. Pi, dutiful and proud, guided the young — now feathered and restless — on their first hops and flights. Another brood came, and then another. 

As the season warmed, the Pi family shifted their nest to the opposite corner of the patio, perhaps sensing the subtle change in heat and light. I began calling it Pi Palace — their elegant little haven — when reporting to Cornell’s NestWatch.

That summer of 2020, I caught many glimpses and treasured moments:

— a radiant Mr. Pi on April 22, perched triumphantly atop our water fountain. 


— Mr. Pi enjoying the yard, chest puffed and wings alert on May 31

— a tiny chick sleeping peacefully in the nest on July 29, his head barely fluffed, looking almost prehistoric when zoomed in — a little dinosaur in down.

Seasons passed. The retractable awning was eventually replaced with a beautiful pergola topped by a transparent roof. The original nesting corner was no longer usable, but the Pi family, ever resourceful, simply shifted to the remaining corner. They stayed, singing songs from our ledges. 

Each fall, I would gently clean out the nests. But not in 2024. In early 2025, I noticed an old nest hanging low. Had a raccoon pulled at it? Or had the finches themselves dismantled it to make way for the new?

I left it untouched - their domain.

Then came May 8, 2025 — a fierce storm swept through with high winds and hail. Just two days later, on May 10, a magnitude 4.1 earthquake struck, its epicenter only 13 miles away. When I checked the nest on May 11, it was gone — completely blown away.

I found remnants. The fallen nest showed no eggs, just some fecal matter and an old pale blue shell — likely from the previous season. But what stunned me was the new nest I had seen earlier: a true architectural marvel. Unlike the simpler constructions from 2020, this one was built with polypropylene mesh netting — white, lightweight, water-resistant, and incredibly strong. It wasn't just insulation — it formed a structural framework around the cup of the nest. Inside, the lining was soft with fur, carefully chosen for warmth and comfort. 

Mr. and Mrs. Pi and their offspring had adapted — not just surviving, but evolving, weaving human-made materials into the fabric of their home. It was a quiet testament to ingenuity and resilience, to learning over time, and to the persistence of life at the edges of our own.

What began with a startled straw-drop in 2020 became five years of quiet companionship — seasons of nests, fledglings, and shared space. Their broods grew, their brilliance shone, and their trust gently deepened.

And if you're still nearby, the original Mr. and Mrs. Pi — thank you for making our patio your home, the Pi Palace. Whether it’s you or your descendants fluttering through the garden now, your legacy lives on. In your small, determined way, you showed us how life adapts, how beauty is built from scraps, and how even the tiniest creatures can leave lasting imprints on our hearts.

Monday, April 13, 2020

Genes and Proteins of COVID-19

A pneumonia of unknown cause detected in Wuhan, China was first reported to the WHO Country Office in China on 31 December 2019.  The outbreak was declared a Public Health Emergency of International Concern on 30 January 2020 and declared a pandemic on March 11. By that time the disease was known as COVID-19 and the name of the new virus was SARS-CoV-2


Scientists worked at speed to make this virus's gene and protein information available at record time. 

READ MORE

Wednesday, August 28, 2019

Saving the Pond


Reproduced from Aurametrix

There are several million ponds in United States (Renwick et al, 2006), and many are in need for preservation. This pond (35°33'51.7"N 84°13'38.5"W), part of Kahite hiking trail system in East Tennessee, attracts a variety of wildlife, with ecological benefits and habitat. It preserves community open space and property values.

The pond began to deteriorate as invasive submerged plants such as Hydrilla (notoriously difficult to eradicate without serious chemical herbicides) started growing under the surface of the water causing problems for aquatic life. The pond used to be naturally cleaned by a stream connecting to Tellico lake, but the stream got clogged up and the pond is in need of help.

Dying Pond

Members of the community desire to save it because of its mystique, beauty and recreational value, and they need an economical and environmentally friendly way of restoring new life to our pond. This project would be a great example of civic engagement, helping to educate future Nature Conservancy volunteers. Here is the story of the pond.

Aerial view of the pond
It is not known when this small (surface area ~0.5 acres), tranquil pond was born in the scenic greenery of East Tennessee. The land area around the pond was owned by an Overhill Cherokee descendant, Bowhunter, sun of a local chieftain. For Cherokees, water was the source of all existence and the deposit of all living things. It marked both the beginning and the terminus of material life and persisted beyond the realm of the temporal into infinite existence. Going to water was a part of the ritual for obtaining long life and recovering from a thickness (Mooney, 2012). No doubt, Bowhunter would cherish and maintain his pond.
Beautifully maintained historic road

Shortly after the 1819 Calhoun treaty that established Monroe county, an early settler John McGhee purchased the land. Over the years the property was owned by Peter Moser, Shakely Farma, Bob Starnea, Jogn Caraon and other families. In 1920s, the first documented house within the boundaries of modern Kahite neighborhood was built by Bert Anderson. The settlement along Mt. Zion Road within the boundaries of Kahite began with a tenant house built by the Robinsons.  In the late 1940s, the land was acquired by the Williams family who built a house and a barn near the pond. They used the pond for agricultural purposes, as water sources for livestock.

In the 1960s the Tennessee Valley Authority began buying up the land  for the creation of Tellico Reservoir. And so water spread over the valley and the lake was born. But a part of Mt. Zion road used by the early settlers was still there and so was the pond.

The Pond after the rain
In the 1960s Monroe county lagged badly behind the rest of the state in most important economic measures. Development of Kahite, the final major neighborhood of Tellico Village, started in August 1996 with the goal to bring jobs and economic growth. But there was more to it, as members of the community volunteered to plant community gardens, build trails and were eager to turn the land into a welcoming haven for humans and wildlife.

Pond in need of restoration
The shoreline lands around Tellico lake are no longer stagnant communities, but a recreation wonderland maintained by environment and wildlife conservation enthusiasts. It's a land of educated volunteers willing to employ new sustainable green chemistry approaches and innovative methods of building and maintaining healthy ecosystems.

Ponds provide enjoyment from offering a closeness to nature and increase the habitat available for our freshwater wildlife.

We do not inherit our ponds from previous generations, we borrow them from the future ones. We need to maintain them for their beauty, for their cultural significance, and protect next generations of human beings and other inhabitants of the Earth.









REFERENCES

Renwick WH, Sleezer RO, Buddemeier RW, Smith SV. Small artificial ponds in the United States: impacts on sedimentation and carbon budget. In Proceedings of the Eighth Federal Interagency Sedimentation Conference 2006 Apr 2 (No. 8th, pp. 738-44).

Gary Mulliner, 2010, History of Kahite, Iterpretive Exhibit.

Mooney J. Myths of the Cherokee. Courier Corporation; 2012 Mar 7.

Stager JC, Wiltse B, Hubeny JB, Yankowsky E, Nardelli D, Primack R. Climate variability and cultural eutrophication at Walden Pond (Massachusetts, USA) during the last 1800 years. PloS one. 2018 Apr 4;13(4):e0191755.

Genoa R. Warner, Yogesh Somasundar, Kyle C. Jansen, Evan Z. Kaaret, Cindy Weng, Abigail E. Burton, Matthew R. Mills, Longzhu Q. Shen, Alexander D. Ryabov, Gabrielle Pros, Tomislav Pintauer, Saborni Biswas, Michael P. Hendrich, Julia A. Taylor, Frederick S. Vom Saal, Terrence J. Collins. Bioinspired, Multidisciplinary, Iterative Catalyst Design Creates the Highest Performance Peroxidase Mimics and the Field of Sustainable Ultradilute Oxidation Catalysis (SUDOC). ACS Catalysis, 2019; 7023 DOI: 10.1021/acscatal.9b01409

Monday, March 18, 2013

Blood and Taxes

Nothing is certain, but blood pressure does increase in the end of  winter and beginning of spring. According to Aurametrix users and google statistics. As a matter of fact, it highly correlates with tax fever - as found by Google Correlate algorithm comparing millions of web queries  - see the figure on the right with searches for property taxes shown in red. Or check it yourself!

But the reason for raising blood pressure is not always taxes. Seasonal variation in blood pressure was noticed and described more than 50 years ago and was connected to periods of decreasing outdoor temperature. It happens to healthy individuals and those who suffer from high blood pressure, especially in the elderly.
The figure shows fluctuations in blood pressure observed by French researchers in a large study of 9294 65+ old residents of Bordeaux, Dijon, and Montpellier. Both systolic and diastolic parts of blood pressure as well as heart rate measurements significantly differed across the seasons with a clear trend for increase in colder months. And decreases following warmer weather - the higher the temperature, the larger the blood pressure decreases. Changes in blood pressure relative to outdoor temperature were largest in the elderly (80+ years old).  On average, for a 15°C decrease in outdoor temperature, Systolic blood pressure (SBP) increased 0.8 mm Hg in those aged 65 to 74 years compared with 5.1 mm Hg in the oldest group (≥80 years). For a 15°C increase in temperature, SBP decreased 9.9 mm Hg in the youngest group vs 13.8 mm Hg in those 80 years or older. Winter increases in blood pressure did not seem to be caused by increased alcohol consumption and decreased activity. Neither were they dependent on the indoor temperatures - spending over 12 hours in warm rooms did not help.

The inverse correlation of blood pressure and outdoor temperature is even stronger for "apparent temperature"- aka the perceived coldness derived from the combination of temperature and wind. And it was observed all over the world - as documented in studies performed in US, Denmark, China, Japan... Possible explanations include direct thermoregulation-mediated vasoconstriction, hypothalamic-pituitary-adrenocortical axis (HPAA) and sympathetic nervous system (SNS) activation, sodium/volume retention and impaired endothelial-dependent vasodilatation.  Reduced sleep duration or quality could be also contributing.

Environmental hypertensionology is a very young science. Many things in our environment can cause high blood pressure. The exact mechanisms are not well understood, but systems like Aurametrix could utilize the wealth of empirical evidence and use it for prediction and prevention.

The high blood pressure season is almost over. Fortunately, many critically ill people made it through and, hopefully, learned more. Let's gear up to make the next time easier.

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REFERENCES

Alpérovitch, A. (2009). Relationship Between Blood Pressure and Outdoor Temperature in a Large Sample of Elderly IndividualsThe Three-City Study Archives of Internal Medicine, 169 (1) DOI: 10.1001/archinternmed.2008.512

Halonen, J., Zanobetti, A., Sparrow, D., Vokonas, P., & Schwartz, J. (2010). Relationship between outdoor temperature and blood pressure Occupational and Environmental Medicine, 68 (4), 296-301 DOI: 10.1136/oem.2010.056507

Brook RD, Weder AB, & Rajagopalan S (2011). "Environmental hypertensionology" the effects of environmental factors on blood pressure in clinical practice and research. Journal of clinical hypertension (Greenwich, Conn.), 13 (11), 836-42 PMID: 22051429