Author Archive

Don’t Go

July 27, 2020

My father was born in Buczacz (pronounced Buchach), Poland where soccer was the most popular sport.  The town soccer teams were split along ethnic lines, and they often played against each other.  The Poles were supposed to be the best, the Ukrainians 2nd, and the Jews the worst.  In reality the opposite was true.  Though the referees would cheat excessively for the Polish soccer team, the Jewish soccer team would invariably defeat them anyway.  After beating the Poles, the Jewish fans and players fled the stadium because if the Poles cornered any Jew following their humiliation, they would beat them senseless or possibly even murder a trapped Jew.

Hitler broke his treaty with the Soviet Union in June of 1941, and Germany invaded Soviet-occupied Poland where Buczacz was located.  As soon as the Germans took control of the town, the Gestapo issued an order for all Jewish male heads of households in Buczacz to report to the town soccer field. My Grandfather Isadore vacillated over whether he should go or not.  His first wife, my Grandmother Regina, urged him not to go.  Years later, she often recounted how she told him “don’t go, don’t go.” My grandfather didn’t want to start off on the wrong foot with the German authorities, but on the other hand he did not trust them.  In the end he decided not to go.  That night, they heard the sound of a machine gun coming from the direction of the soccer field.  My father, then 11 years old, knew immediately what had happened–the Germans had murdered all the Jewish men gullible enough to follow German orders.  His parents assured him that his fears were baseless, but a Jewish track athlete had managed to run away and escape, and he came to their house that night and confirmed my father’s fearful assumption.

Simply ordering Jews to report to their execution was a common tactic Germans used to liquidate a town or city of its Jews.  The executions were called Actions.  With most of the male leadership gone, Germans found it easier to intimidate the remaining population, moving them to ghettos or shipping them off to labor camps.  Jews who managed to escape these mass shooting were often attacked by gangs of Poles or Ukrainians during their escape. The natives killed Jews for their money, jewels, or houses.  They were quick to take advantage of a Jew’s misfortune.

10,000 Jews lived in Buczacz before World War II, making up about half the population.  7,000 were killed directly in town and most of the rest were shipped off to concentration camps.  There were a total of 3 Actions or mass shootings; but Germans, Poles, and Ukrainians murdered many Jews in individual incidents.  From a 2nd story window my father’s family witnessed a German officer shoot a teenaged girl in the head.  Her blood flowed in the snow.  The German ceremonially put gloves on before the shooting and removed them after.  Germans began rounding up Jews to send to concentration camps, and my father’s family hid in the septic tank when the Germans knocked on the door and shouted, “Jew, come out.”  My grandfather knew this was not a tenable situation–eventually the Germans would enter the house and conduct a thorough search and drag them out because their Polish neighbors would tell them Jews were inside. So he went to the countryside and found an Ukrainian farmer who agreed to hide his family in an hayloft in exchange for gold.  My grandfather gave the man some gold and promised more after the war was over.  My father and his brother hid in an hay wagon on the way to the farm and were later joined by their parents.  Still later, my Uncle Haskell stayed with them after his wife and children were taken to a concentration camp while he was at work.  The 5 of them stayed in the hayloft for 2 years, and they suffered from cold, hunger, and thirst.  The farmer gave them each 1 piece of bread a day and the water from boiling potatoes, and on Christmas he gave them butter.  During summer the farmer provided all the dandelions, cucumbers, and cherries they could eat.  The relationship was not harmonious, however.  Whenever the Germans won a major battle the farmer threatened to kick them out.  The Russians liberated Buczacz in 1944, and my father’s family was able to leave the hayloft.   My father’s family were among the 100 Jews in Buczacz who survived…~1% of the Jewish population.

Buchach - Navigator Ukraine

Buchach, Ukraine where my dad was born and grew up.  It was part of Poland when he lived here.

My Grandfather Isadore Gelbart with his 2nd wife, Ilsa.  He lost his parents, 5 brothers and sisters, and many uncles, aunts, and cousins during the Holocaust; but he saved his 1st wife, sons, and brother-in-law. Photo circa 1976. Isadore owned a shoe store until WWII.  He became a lawyer after the war at age 60.  His father was a beekeeper who made mead and sold it to bars.

My Grandmother Regina grew up in nearby Nadworna before she married Isadore. 2,000 Jews lived in Nadvorna and they suffered the same fate as the Buczacz Jews.  Shortly after occupying Nadvorna, the Germans were looking for a convenient location to mass execute as many Jews as they could.  The Ukrainians pointed out a trench used to store ammunition during World War I.  Unlike the first Action in Buczacz, most of the victims in this mass execution were women and children, killed while their husbands and fathers were at work.  Over 1000 children were shot here.  Pious Jews in Nadworna were especially persecuted.  Rabbi’s beards were set on fire, and some had their eyes poked out while being taunted about how their God was not protecting them.  Some Germans justified the executions with bizarre mental gymnastics.  Shaje Shmerier, one of the very few Nadvorna survivors, relates how on a cold winter’s day he was using an iron bar to break the ice on top of a well when a German soldier came up to him and said, “we only killed the communist Jews.  The good Jews are safe.”  Schaje thought of telling him children are not communists and don’t even know what communism is but didn’t want to stand and argue with the German.  He avoided them and had been using that particular well (which was off the busiest route) in the hopes of not running into any Germans.

Ukraine - Ukraine Poland, Nadvirna Nadwirna Nadvorna Nadworna ...

Nadvorna, Ukraine.  When my late grandmother grew up here, it was part of the Austro-Hungarian Empire, then after WWI it was Poland.  It was a popular resort town during the early 20th century.  Most of the 2,000 Jews who lived here were killed during the Holocaust.

A very brief history of Galicia since 1500 when the Jews arrived.

Location Galicia in Europe.svg

The province of Galicia is half in Poland and half in the Ukraine.  It was all part of Poland when my father lived there.

Polish noblemen owned huge estates in Galicia during the feudal ages.  They started inviting Jewish merchants onto their estates because they wanted to improve their local economies.  Jews, persecuted elsewhere, were glad to live on these estates, and they started arriving in Galicia about 1500.  Eventually, prosperous towns like Buczacz and Nadworna started popping up on these estates. Jews became part of the newly emerging middle class artisans and merchants who stabilized the economy.  Cossacks, descendants of Ghengis Khan’s hordes, and Turks repeatedly attacked Galicia and occasionally laid ruin to some towns, murdering and terrorizing the Jewish population along the way.  But the towns were always rebuilt.  By the early 18th century the Austro-Hungarian Empire drove the Turks away, and it controlled the province until World War I. (My grandfather served as a cavalry officer in the Austro-Hungarian Army during the war.) Poland gained independence after World War I, and Galicia became part of Poland.  After World War II the Soviet Union swallowed up the province.  The Soviet Union collapsed in 1991, and the Ukraine declared its independence.  Galicia is now split between Poland and the Ukraine.

Reference:

Nadworna

Numerous authors

Landmanshaft of Nadworna in Israel and America 1975

Led Zeppelin’s “The Lemon Song” is Like a Tribute to Howlin’ Wolf

July 20, 2020

My wife told me she would play “The Lemon Song” at my funeral, if she outlived me, but when I reminded her of this statement the other day she had a different memory. She claimed told her to play that song at my funeral.  I think my memory is correct because I’m pretty sure I won’t care what song anyone plays at my funeral.  Our memories differ over other (and more) important  events as well.  The first time we ever made love I remember we employed the reverse cowgirl posture, but she refutes my memory and says it didn’t happen that way.  How could our memories about such an important event be so different?  No matter which one of us chose “The Lemon Song” to accompany my burial, it is my favorite Led Zeppelin Song.

“The Lemon Song” is Led Zeppelin’s version of an old Howlin’ Wolf song known as “The Killing Floor” first released in 1964.  Howlin’ Wolf whose real name was Chester Burnett released at least 2 different versions of “The Killing Floor.”  In 1 version a brass section plays a prominent part and in the other there is no brass section.  The brass copies Howlin’ Wolf’s guitar playing in the former.  The version without a brass section is almost 1 minute longer.  “The Lemon Song” is the 3rd song on Led Zeppelin II released in 1969.  Led Zeppelin II was the best selling rock album of that year.

Howlin' Wolf. "Where the soul of man never dies," no less a figure ...

Chester Burnett aka Howlin’Wolf  influenced rhythm and blues rockers of the 1960s and 1970s.

Led Zeppelin - Official Website | News

Led Zeppelin is one of the most popular and successful rock acts of all time.  John Paul Jones (top) and from left to right the late John Bonham, Jimmy Page, and Robert Plant.

In “The Lemon Song” the rhythm guitar and bass open at a slower tempo than in “The Killing Floor,” but John Bonham’s drum beats are heavier and louder.  To be honest I don’t even notice the percussion in “The Killing Floor.”  Then 1:30 into the song, Jimmy Page plays a fast guitar riff that imitates the brass section from “The Killing Floor” for exactly 1 minute.  This is my single favorite guitar riff of all time, and it sounds superior to the original.  After the riff the song slows down again and there is an interplay between Robert Plant’s jazzy blues singing and Jimmy Page’s guitar playing.  Plant interpolates the lyrics “The way you squeeze my lemon, I’m gonna fall right out of bed.”  These lyrics were sung in an earlier song by another blues artist, Robert Johnson, who likely in turn stole them from some unknown blues singer.  The name of the song is a metaphor for a man’s penis, but I suppose they couldn’t name this song “The Dick Song.”  The song is basically raw sexuality.  In the final 30 seconds of the song Jimmy Page repeats his fast guitar riff.  “The Lemon Song” is twice as long as “The Killing Floor,” and Led Zeppelin almost gave it the same name.

This is the version of “The Killing Floor” that has the brass section imitated by Jimmy Page using his electric guitar.  Another version is 30 seconds longer and does not have a brass section.

In this version of “The Killing Floor” Howlin’ Wolf uses his guitar to play what the brass plays in his other version.  His guitar playing is more subtle than Jimmy Page’s interpretation.

My favorite Led Zeppelin song.

While I was researching this article I came across this version of “The Killing Floor” that predates “The Lemon Song” from a group I had never heard of–Electric Flag.  It sounds pretty good.

Jimmy Page says he was paying tribute to the old blues artists when he transformed their work into Led Zeppelin songs.  However, on some occasions Led Zeppelin has been rightly accused of plagiarism, and other artists have successfully sued them for credit and money.  On behalf of Chester Burnett, Arc Records sued Led Zeppelin for their tribute to “The Killing Floor.”  Chester Burnett received a settlement of $45,123 in 1972, and Led Zeppelin added his name to the songwriting credits.  In my opinion I don’t think Jimmy Page stole these songs from malice or greed.  I believe he honestly thought he was paying tribute to these artists by making their songs sound even better.  Page was a drug-addled hippie without a clear understanding of copyright law.  He may have mistakenly believed these songs were part of the public domain (like many old folk songs are) or simply didn’t care.  He was a musician…not a lawyer.  Moreover, when he recorded these songs, he had no idea how popular and financially successful Led Zeppelin was going to be.  He didn’t know they were going to make so much money.

Led Zeppelin did not steal “Stairway to Heaven” from a group called Spirit.  A recent lawsuit claims “Stairway to Heaven” is a rip-off of Spirit’s “Taurus.”  There is a vague similarity at the beginning of the 2 songs, but Rick Beato, a music professor, says they both use the same line cliche` found in at least 25 songs dating back to at least 1938.  “Stairway to Heaven” has a melody over this line cliche`, while “Taurus” does not.

Rick Beato, a music professor, explains how “Stairway to Heaven” is not ripped off from the Spirit song “Taurus.”

The Clarendonian Land Mammal Age

July 13, 2020

Many science writers often describe the Pleistocene of North America as resembling the modern day African Serengeti.  I debunked that notion 7 years ago in an article I wrote for this blog (See: https://markgelbart.wordpress.com/2013/12/09/the-faunal-diversity-of-pleistocene-north-america-was-less-than-that-of-modern-day-africa/ ) In terms of biomass Pleistocene North American might have been as impressive but not when it comes to biodiversity.  Africa has almost twice as many species of mammals as Pleistocene North America. However, there was a time period during North America’s natural history when it was biologically more diverse than modern day Africa.  The Clarendonian Land Mammal Age during the middle Miocene lasted from ~13 million years ago to ~9 million years ago.  The age is named after the Clarendon local fauna based on fossils found from 24 sites in Donley County, Texas.  Scientists are aware of 34 mammal families that lived in North America during this age.  This includes 8 genera of artiodactyls such as camels and llamas, peccaries, deer, and pronghorns.  There were 15 genera of horses plus tapirs and 2 species of rhinoceros.  1 species of primitive oreodont still clung on, though they were formerly more diverse.  Bear-dogs (Amphycyon sp.) also still survived but were headed for extinction.  4-tusked gompotheres, kin to elephants, entered North America by crossing the Bering Land Bridge and colonized the continent.  Predators included 8 genera of canids and 11 genera of weasels, and there were 9 genera of rodents.  River dolphins and dugongs swam in the waters.  The bone-eating dogs (Borophagine), ancestors of saber-tooth cats (Nimravides), and false saber-toothed cats (Barbourofelis) were the dominant large predators.  Fanged cats and cat-like animals came in all sizes.

Among the amazing diversity of mammals were some remarkable morphological convergences with modern day species of African fauna.  There were giraffe-like camels that evolved long necks to feed on the tops of trees, aquatic hippo-like rhinos, and fast running gazelle-like horses.

Teleoceras | Animal of the world Wiki | Fandom

The hippo-like rhino Teleoceras.

Aepycamelus | Extinct animals, Ancient animals, Prehistoric animals

The giraffe-like camel Aegypcamelus.

Nannippus sp. by Dinogod.deviantart.com on @DeviantArt

The gazelle-like nannihippus.

Climate over most of North America during the middle Miocene was warm and mostly non-seasonal.  Before the Clarendonian Land Mammal Age tropical and sub-tropical forest covered most of North America, but the uplift of the Sierra Nevada and Cascade Mountain Ranges caused increased aridity.  Warm savanna grassland and open woodland replaced the thick forest, and this resulted in a greater diversity of mammals, taking advantage of this more productive habitat.  Grazing herds of ungulates and burrowing populations of rodents in deep grassland soils thrived in this environment.  Climate change brought an end to the Clarendonian Land Mammal Age.  Conditions became even more arid and seasons became more pronounced.  Warm savannahs and open woodlands were replaced with steppe grasslands where  winters started to trend toward sub-freezing temperatures.  Many species of mammals could not adapt to harsher winters and simply went extinct. By the end of the Miocene and beginning of the Pliocene large mammal diversity was much reduced, but new cold-adapted species from Eurasia (crossing the Bering Land Bridge) and new immigrants from South America (crossing the newly emerged Isthmus of Panama) helped replenish biodiversity in North America. Though large mammal diversity never again approached that of the Clarendonian, it was an healthy cavalcade until the end of the Pleistocene when man wiped most of them out.

Eastern Range Extensions of Western Fauna on Xeric Limestone Prairies

July 6, 2020

I wrote an article a few years ago about roadrunners (Geococcyx californiannus). (See: https://markgelbart.wordpress.com/2016/08/05/pleistocene-roadrunners-geococcyx-californianus/ ) I noticed roadrunners ranged into Arkansas–a curious eastern range extension–and I wondered why.  A few weeks ago, a scientist sent me a box of science books, and I found the answer to my question in 1 of them.  Xeric limestone prairies in Arkansas and Missouri provide excellent habitat for 3 species of western fauna including roadrunners, collared lizards (Crotophytus collaris), and Texas brown tarantulas (Aphonopelm hentzi).  Xeric limestone prairies are openings in woodlands that are created naturally but may be maintained with or without human influence.  Dry shallow soils, not more than 3 feet deep, on a bed of limestone or dolomite, favor the growth of grass over trees. Little bluestem grass dominates xeric limestone prairies, but Indian grass, side oats gramma, and big bluestem also grow on them with the summer annual grass, poverty dropseed, on areas with even shallower soils.  Grazing and fire help maintain these openings, but the dry shallow soils high in calcium can remain open without these influences.  Nevertheless, in the absence of fire or grazing woody encroachment can occur.  Juniper, blackjack oak, and black hickory may invade some xeric limestone prairies.

 Xeric Limestone Prairie in West Virginia.

www.allaboutbirds.org/guide/assets/photo/603886...

Roadrunners primarily are a western species, but they have an eastern range extension into Arkansas because they like limestone prairies.

Texas Brown Tarantula.jpg

Texas brown tarantulas also range into limestone prairies in Arkansas.

Eastern Collared Lizard | MDC Discover Nature

Dry limestone prairies provide habitat for an eastern range extension of the collared lizard.

Reptiles like to sun themselves on the limestone rocks scattered throughout these prairies, and this attracts roadrunners that prefer open areas with lots of the insects, reptiles, and rodents they prey upon.  Collared lizards are 1 of the reptiles that like to sun themselves on rocks, and they may become prey for roadrunners,  but they are also predators that hunt insects and other lizards in this habitat..  Collared lizards are cannibalistic.  Texas brown tarantulas, yet another western species extending their range east on limestone prairies, are large spiders reaching 6 inches in length with a 4 inch leg span.  They can weigh as much as a McDonald’s quarter-pounder.  Their venom is not harmful to humans unless the person is allergic.  But their fangs are large and can cause a painful bite that may get infected.

Other species of animals common on xeric limestone prairies in Arkansas include 6-lined race runners, southern coal skinks, fence lizards, slimy salamanders, leopard frogs, box turtles, Bachman’s sparrows, field sparrows, prairie warblers, cerulean warblers, Kentucky warblers, painted buntings, brown thrashers, hawk wasps, and numerous species of grasshoppers.

Xeric limestone prairies are not confined to Arkansas and Missouri but are also found in parts of West Virginia, Alabama, Tennessee, Georgia, Indiana, Illinois, Ohio, and Pennsylvania.  However, limestone prairies in those states don’t host as many species of western fauna as those in Arkansas and Missouri.  The Mississippi River must be too big an hurdle for them.

Reference:

Cartwright, Jennifer and William Wolfe

“Insular Ecosystems of the Southeastern United States: A Regional Synthesis of Support Biodiversity Conservation in a Changing Climate”

U.S. Geological Survey Professional Paper 1828 2016

New Study of the Seda-DNA in Hall’s Cave, Texas

June 29, 2020

A new study of seda-DNA and bone DNA from Hall’s Cave documents the changes over time in the plant and animal communities on the Edward’s Plateau in Texas.  Previously, scientists had collected and identified thousands of bones in Hall’s Cave from 56 species of mammals, 30 species of birds, 9 species of amphibians, 3 species of reptiles, and 2 species of fish.  The bones date from the Last Glacial Maximum (~20,000 years BP) to the early Holocene (~9,000 years BP).  The new study extracted DNA from the bones but in addition took samples of DNA from the sediment. (Scientists call DNA from sediment samples, “seda-DNA.”)  Sampling DNA from the sediment has the added advantage of detecting the presence of plant remains that were otherwise unidentifiable, and the presence of animals that perchance left no skeletal remains at all in the cave.  For example 2/36 bone samples were from cat but 7/10 sediment samples detected cat.  Jaguars and bobcats urinated, defecated, and shed hair in the cave but left no skeletal remains.  The seda-DNA samples detected 36 of the 56 species of mammals known to have  occurred in the cave from fossil evidence but they found an additional 7 species of mammals as well as additional species of birds not collected as fossils here, including ducks and geese.  They also determined which species of woodrat lived in the cave, an identification not really possible by just looking at the bones.

Deer mouse, cottontail rabbit, and eastern woodrat were the most common species of small mammals found in the cave since the Last Glacial Maximum, and these species occurred throughout all climate phases.  White-tailed deer and bison were the most common large mammals found in the cave and they too were found throughout all climate phases, though they became less abundant over time.  Hackberry and oak were the most common plant species found in the cave, and they were found throughout all climate phases.  Hackberry still grows near the entrance of the cave.  According to local pollen studies, pine was the most common tree growing on the Edward’s Plateau during the Ice Age, but it is absent from the cave.  Pine simply didn’t grow near the cave.

Hall’s Cave.

Edwards Plateau Savannas map.svg

Location of Edward’s Plateau.

Dendrogram of species found via DNA sampling in Hall’s Cave.  From the below referenced study.

The study sheds light on the changes that occurred on the Edward’s Plateau since the Last Glacial Maximum.  During the height of the last Ice Age weather patterns differed from those of today–more precipitation fell on southwestern North America whereas southeastern North America was more arid.  As a result, the Edward’s Plateau hosted a prairie environment with trees found at scattered locations.  Soils were much thicker because dense grass regularly decayed.  Deeper soils were good environments for prairie dogs, 13-lined ground squirrels, pocket gophers, and marmots.  Common large mammals included camel, pronghorn, and flat-headed peccary that were preyed upon by saber-tooths, dire wolves, and giant short-faced bears.  Birds that preferred treeless plains–prairie chickens, upland sandpipers, horned larks–abounded here then.

The environment changed here about 15,000 years ago during the Boling/Alerod Interstadial when temperatures and precipitation increased.  The prairie converted to open woodland and forest with widely spaced oak, ash, juniper, walnut, mulberry, and hackberry trees.  Plenty of grass still grew between the trees…enough to support a population of horses.  Many of the open plains animals disappeared from the record here including the pronghorn, camel, and flat-headed peccary.  Black-tailed jackrabbits, northern grasshopper mice, and prairie chickens all left the area as well.  However, turkey, bobwhite quail, and barking tree frogs moved onto the Plateau because they liked the newly expanded tree and thicket habitats.

12,900 years ago, during the Younger Dryas cold phase, the climate suddenly became much colder and dryer.  Vegetation decreased and the region became desert-like.  Small and large mammal and plant diversity decreased.  Following the end of this cold phase, temperatures and precipitation increased, though rainfall didn’t increase to the levels of the LGM and Boling/Alerod Interstadial.  Soils of the Edward’s Plateau were still thinner than they were during the LGM and today the region is dominated by a plant community of live oak, juniper, and hackberry.  Plant and small animal diversity rebounded but large mammal diversity did not.  The authors of this paper suggest man is likely responsible.  Plant and small mammal ranges adjusted to climate change, and they disappear and re-appear in the seda-DNA samples over time.  If not for overhunting by man, the same should hold true for large mammals.  14 species of large mammals that lived on the Edward’s Plateau during the late Pleistocene are either extinct or extirpated from the region.

Plant and animal composition does not stay constant, and the study found some non-analogue components living side by side.  Today, white-tailed jack rabbits and barking tree frogs have ranges that do not come close to overlapping, but both species lived on the Edward’s Plateau during the Boling/Alerod Interstadial.    Bog lemmings and least weasels ranged much farther south then and co-occurred with species of more southerly affinities.  Animal and plant communities are dynamic and always changing.

Species Profile: Barking Treefrog (Hyla gratiosa) | SREL Herpetology

Range of barking tree frog.

White-tailed jackrabbit - Wikipedia

Range of white-tailed jack rabbit.  White tailed jack rabbits and barking tree frogs both lived on the Edward’s Plateau during a warm interstadial of the last Ice Age, indicating the existence of non-analogue environments dissimilar to any that occur today.

Reference:

Seersholm, F.; et al

“Rapid Range Shifts and Megafaunal Extinctions Associated with Late Pleistocene Climate Changes”

Nature Communications 2020

https://www.nature.com/articles/s41467-020-16502-3#:~:text=Large%2Dscale%20changes%20in%20global,impacted%20ecosystems%20across%20North%20America.&text=Instead%2C%20five%20extant%20and%20nine,the%20end%20of%20the%20Pleistocene.

Tuna- The Superfish

June 24, 2020

Most people think of tuna as just some fish in a can that is an ingredient in tuna salad.  They don’t appreciate what a spectacular animal it is.  Biology books state that fish are cold-blooded, but tuna are an exception to this rule.  Tuna are actually a warm-blooded fish, and this physiology enables them to swim at ultra high speeds of up to 47 mph.  That is faster than most boats.  However, their warm-blooded physiology has a greater temperature range than those of mammals and birds.  Their blood temperatures do vary, while mammal and bird temperatures generally stay constant, unless they are sick.  The video below shows off the impressive speed of this animal.  They swim with dolphins for protection against sharks, explaining why dolphins can get caught in nets intended for tuna.

 

Tuna are large predatory fish that can swim up to 47 mph.

There are 15 species of tuna within 5 genera including the Allothonnus (thunder tunas), the Auxil (frigate tunas), Euthynnus (little tunas), Katsunnus (skipjacks), and Thunnus (true tunas).  Bonitos are considered a sister species to the tunas, and both are part of the mackerel sub-group.  4 species of tuna overwhelmingly make up the tuna found in supermarket cans and at fish markets and sushi restaurants.  These include bluefin, yellowfin, skipjack, and albacore.

Tuna did not become a popular food fish until well into the 20th century, but now every grocery store in the U.S. stocks tuna.  It doesn’t seem likely to me that this can go on forever.  Eventually, wild tuna populations will become too depleted to support this fishery.  The future of tuna remaining a staple in our diet is aquaculture, but tuna fish farming is in its infancy.  Some Japanese have had experimental tuna fish farms for decades, but the 1st tuna farm in America just opened business last year in San Diego.  Tuna fish farming, unlike tilapia, catfish, and salmon aquaculture, has a long way to go.

There is evidence from Indonesia that humans caught tuna as early as 42,000 years ago. (See: https://markgelbart.wordpress.com/2011/12/07/deep-sea-fishing-42000-bp/ ) It’s surprising some primitive people had deep sea fishing technology that early, though tuna swam closer to shore during the Pleistocene because land extended over the continental shelf and deep waters were located closer to the coast then.

Albacore - Wikipedia

The most common species of tuna found in a can–albacore.

Giant Bluefin Tuna Sells for $3.1 Million in Tokyo | Fortune

500 pound tuna are worth over 3 million dollars to sushi chefs.

1 of my favorite summer dishes is tuna noodle salad and it is very easy to make. Mix a 12 oz package of tuna with the juice of a lemon.  Add a 16 oz box of cooked macaroni, mayo to taste, a can of peas, chopped celery, chopped Vidalia onion, and couple of chopped hard boiled eggs. Stir it up and serve it warm or cold from the refrigerator.

This is my tuna noodle salad.  It’s great warm or straight out of the refrigerator on a hot summer’s day.

North American Army Ants

June 17, 2020

Most people are familiar with the army ants of South America and the driver ants of Africa featured in many nature documentaries, but few are aware army ants also occur in North America.  There are 30 species of army ants from the Neivamyrmex genus and 1 species from the Novamyrmex genus living on this continent.  North American army ants differ from those of South America and Africa.  North American army ants cross the landscape in more narrow spear-headed swarms than those of their tropical cousins.  Nevertheless, they are just as predatory.

Neivamyrmex nigrescens, Arizona

A species of North American army ant.  Notice how thick their antenna are. Years ago, I witnessed army ants tearing apart an earthworm in Columbia County, Georgia. This photo is by Alex Wild from the below link.

Army ants don’t live in permanent nests.  Instead, they alternate between foraging and stationary phases.  During foraging phases they roam across the land searching for food to feed their larva.  They mostly eat other ants and are built to subdue other species.  They have muscular bodies and thick antennas that other ants can’t bite through.  When the larva go into the pupa stage, army ants enter the stationary phase and live within a swarm of their own bodies.  Colonies produce new queens every 3 years, and the colony will split into 2 after the new queen is born.  Most army ant colonies perish when the queen dies, but some manage to track down a closely related queen and will merge with that colony.

There are over 200 species of army ants worldwide including 5 genera in the Americas and 2 genera in Africa and Asia.  A study of army ant genetics determined some genera of American army ants are closely related to African army ants.  They diverged 100 million years ago before Africa and South America drifted apart.  Other genera of army ants are not closely related to other army ants and are examples of convergent evolution.

neivmap1

Range map of army ants in North America.  Map is also from the below reference.

Cold climate apparently is a limiting factor for army ant distribution, but it might not be the temperatures.  I noticed in the map of their distribution that the northern limits of their range approximately corresponds to the southern limit of Ice Age glaciers.  Like many species of trees, they simply have been unable to colonize deglaciated territory even though they can survive the cold temperatures of Iowa and Nebraska.

Reference:

Most of the information for this blog entry comes from Alex Wild, a Texas entomologist.  This links to his website.

http://www.myrmecos.net/2008/12/14/army-ants-of-the-north/

Another Pleistocene Survivor–The Bird-Voiced Tree Frog (Hyla avivoca)

June 11, 2020

I discovered a new creature in my yard.  Green tree frogs (Hyla cinerea) are abundant here and often sneak into our house, but I was unaware that my yard is also home to the bird-voiced tree frog until I saw the below specimen in my cat’s water dish.  I saw another one a few weeks later.  Most of the time they stay in the tree tops and that is probably why I’d never seen one before, though maybe they had a good few years of reproduction and are on the increase at my locality.  Bird-voiced tree frogs can be green or gray, depending upon the temperature.

Bird-voiced tree frog.

Video of a bird-voiced tree frog call.

Bird-voiced tree frogs have an interesting range distribution.  They likely diverged from their closest living relatives in the Mississippi River Valley and dispersed across Alabama and Georgia.  Their preferred habitat is swampy bottomland forest, and during warm climate cycles this type of habitat is common in the southeast.  The habitat in my yard is a sandhill loblolly pine/sand laurel oak woodland, but McBean Creek bottomland is just about a mile away.  Bird-voiced tree frogs are absent from peninsular Florida.  They may have occurred in peninsular Florida in the past but were extirpated when most of the state was under ocean during marine high stands.

Species Profile: Bird-voiced Treefrog (Hyla avivoca) | SREL ...

Bird-voiced tree frog range map.

I searched the paleobiology database and learned no fossils of this species have ever been found.  A small animal that lives in a forest has a lesser chance of becoming preserved as a fossil.  Leaves turn the soil acid, dissolving bones.  As far as I can determine, no genetic studies of bird-voiced tree frogs have ever been conducted.  It is an understudied species.

Permafrost as far South as Georgia during the Last Glacial Maximum

June 4, 2020

This is at least the 7th article I’ve written about Carolina Bays, but I keep coming across new and fascinating studies of these curious geological features. (See: https://markgelbart.wordpress.com/?s=Carolina+Bays ) These oval shaped depressions occur across the Carolinas and Georgia.  Their origins baffle scientists, but the commonly accepted explanation is they are topographical formations resulting from Ice Age wind and water erosion.  (Extraterrestrial explanations can be ruled out because Carolina Bays are of different ages, and there are 500,000 of them compared to just 250 known impact craters on the entire earth’s surface.)  I’ve long understood how wind and water erosion shaped the depressions, but I’ve never been satisfied with explanations for how the land initially subsided.  Some think wind simply blew unconsolidated sediment out of the pits, while I’ve suggested the land subsidence occurred due to peat fires (as occasionally occurs today).  In a new book Chris Swezey of the U.S. Geological Service proposed the initial subsidence of Carolina Bays was caused by discontinuous patches of permafrost that thawed during summers and collapsed.

Formerly, scientists thought permafrost (ground that stays frozen year round) extended as far south as northern Virginia during the Last Glacial Maximum, but Swezey believes there were patchy discontinuous areas of permafrost as far south as Georgia.  Carolina Bays resemble geological features found in southern Alaska today where permafrost is scattered and temporary.  The land swells and collapses and fills with water in oval depressions.  Northern Alaska hosts continuous permanent permafrost.

Millions of Arctic Methane Hotspots Detected by NASA – Global ...

Discontinuous patches of permafrost create lakes in southern Alaska that resemble Carolina Bays located in the upper coastal plain of Georgia and the Carolinas.

Average temperature and sea surface level through 35,000 years related to 1990 level

Temperature graph showing average temperatures and sea level fall during the Last Glacial Maximum. Note the dips at about 27,000 and 24,500 years BP.  This is when discontinuous permafrost could have developed on some Georgia and Carolina soils.

I believe this map is misleading.  It shows the southern extent of the boreal forest zone, but zonal forest types as we know them today didn’t exist then.  From the below referenced paper.

Georgia must have been much colder during Ice Ages than I thought.  Most Carolina Bays formed between 35,000 years BP-15,000 years BP when glaciers expanded to cover Canada and New England.  Some date to earlier stadials of the Wisconsinian Ice Age.  Patchy permafrost in the Carolinas and Georgia likely occurred during especially cold phases of the Ice Age that probably lasted for decades rather than centuries.

Landscapes in Georgia during the LGM must have been varied and interesting.  Wetlands on Carolina Bays likely attracted summer populations of ducks, geese, and swans.  Sand dunes from dried out riverbeds rolled over the land, smothering mixed woodlands of pine, spruce, and oak.  Arid conditions favored grasslands that fed horse, bison, and llama; in turn pursued by giant lions and dire wolves.  Strange as it may seem, caribou and stag-moose ranged into this latitude.  Zonal vegetation as we know it didn’t exist then.  Instead, habitats were patchy and species compositions were dissimilar to those of any existing types of forest.  Local microclimates might favor oak thickets, open spruce woodlands, mature pine forests, grassy meadows, small marshy wetlands, or bare soil.  Less than 100 miles east of the inner coastal plain the climate was markedly warmer.  Land extending into what today is the Atlantic Ocean  hosted more warm weather species of plants and animals because it was closer to warmer ocean currents that moderated coastal climates.  Inland, the boundary between cold and warm climates frequently fluctuated, contributing to the patchy unstable environments unlike those of today.

Reference:

Swezey, Chris

“Quaternary Eolian Sand Dunes and Carolina Bays of the Atlantic Coastal Plain Province, USA”

in

Inland Dunes of North America

edited by Lancaster, Nicholas and Patrick Hesp

Springer Books 2020

 

 

My 4th Visit to Phinizy Swamp

May 28, 2020

Phinizy Swamp is a protected wetland located in Augusta, Georgia about a 20 minute drive from my house, and if I could, I would visit it more often than I do.  We strolled through the swamp 2 weeks ago for the first time since my daughter almost stepped on an alligator’s head here.  I wasn’t expecting to see as much bird life during late spring because wintering ducks have already migrated north.  However, I did see big flocks of spotted sandpipers (Actitis macularious) and chimney swifts flying over the water, and I also saw a couple of lesser yellowlegs (Tringa flavipes).  The spotted sandpipers and lesser yellowlegs winter south of Augusta and spend their summers farther north.  Both are migratory transient species for this area.  The lesser yellowlegs breeds in Alaska, so these particular individuals were lagging far behind.  Spotted sandpipers breed through much of the Midwest.

2 spotted sandpipers and a lesser yellowlegs.

8 spotted sandpipers, 1 lesser yellowlegs, and a yellow-bellied cooter.

This was the biggest yellow-bellied cooter I’d ever seen.

We encountered a classroom with a professor and students who were studying the macroinvertebrates and water quality of the swamp.  Some of the macroinvertebrates they may have collected were backswimmers, a bug in the Notonectidae family.  These true bugs (Hemiptera) should not be confused with water boatmen of the Corixidae family.  Backswimmers swim on their backs, while water boatmen swim right side up.  Backswimmers are predators that feed upon insects, tadpoles, and minnows; water boatmen feed upon algae.  Surprisingly, both can fly and find isolated puddles where they won’t be eaten by fish. There is a dragonfly in the below photo as well.  Dragonflies are beneficial predators that eat mosquito larva.

Blue dragonfly perched over backswimmers.

The forest around the swamp consists mainly of water oak, loblolly pine, red maple, sweet gum, and cypress.  My favorite trees here, though, are the beech–otherwise rare in Augusta.

A week after I visited the swamp a man posted a photo on facebook of a bald eagle in Phinizy Swamp.  I hope I get to see a bald eagle here on my next visit.