Fluviodiversity

One of the classic principles/relationships in biogeography is called the species-area curve, relating the number of different species found (usually of some particular taxonomic group; e.g., birds or plants) to the area sampled. These curves are usually well fit by an exponential relationship:

S = c A b

where S is the number of species, A is area, c is a constant representing the number of species in the smallest area sampled, and b represents the rate of increase of species with area. While b could be greater than 1 if major biogeographical boundaries are transgressed (so that whole new sets of species are encountered), otherwise b < 1, and usually much less; 0.25 is a fairly common value.

Juanjo Ibanez and I (in separate studies) found that similar trends apply to soil diversity, with S in this case indicating number of different soil types (e.g., soil series). In his very broad scale analyses, Juanjo also found b » 0.25, while in my landscape-scale studies b was in the range of 0.6.  Syntheses of this work are found in the book Pedodiversity (CRC Press, 2013) edited by Ibanez and James Bockheim.

The Curious Expansion of Polly's Bend

Though the meander bends in the Kentucky River gorge area are considered to be mostly inherited (i.e., they were there before the river began downcutting about 1.5 million years ago), they are not static features. This continues a previous post looking at Polly’s Bend.

Geologic map of Polly’s Bend (from Kentucky Geological Survey’s Geologic Mapping Service). Ollr, Oto, Ocn are all Ordovician limestones. Qal is Quaternary alluvium, and the stippled pattern with the red + is Quaternary fluvial terrace deposits. Polly’s Bend is about 5 km in maximum width.

Public Lecture: "The Basque Language and People – intriguing origins, complex context"

Basque, a minority language spoken in a region straddling the border between Northeastern Spain and Southwestern France, has fascinated linguists and nonlinguists alike for centuries. Part of the mystique surrounding the language is the perception that it is an 'old language': it is an isolate with no demonstrable genealogical relationship with any other language, and has been spoken in the Basque Country for over 2,000 years, a surprising fact given its minority status. This puzzlement about Basque has led many to look for connections to languages spoken in places as far apart from the Basque Country and each other as the Caucasus, India, and North America, or to claim that Basque is the remnant of a language family that was spoken in a much larger area than it is now.



One of the goals of this talk is to demystify Basque, concentrating on a fact often overlooked by those not familiar with the language, namely, that it has been in continuous contact with other languages, especially with Latin and its descendant Romance languages for the last 2,000 years or so. This contact situation has had profound effects, both on the language itself and on its social status, as well as on our scholarly understanding of the structure of the language. On the one hand, the study of the influence that Latin and Romance languages have had on Basque has been one of the main tools that have allowed Basque linguists to elucidate certain aspects of the structure of the language as it was spoken about 2,000 years ago, a scholarly accomplishment that would probably not have been possible if Basque hadn't been in such a contact situation. On the other hand, it would be impossible to understand the current situation of Basque as a minority language without an understanding of its relation to the majority languages spoken in the Basque Country (Spanish and French).

Date:
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UKAA Auditorium (W.T. Young Library)
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Public Lecture: "The Romani People and Their European Context"

Although the Romani language originated in India, it took its definitive shape in Europe. In this sense, the Romani people are as European as many other peoples who arrived in Europe during the Middle Ages, such as the Hungarians. This lecture will discuss the history and cultures of the Romani people and their place in discourses of Europe and nationhood.

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Location:
UKAA Auditorium (W.T. Young Library)
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Public Lecture: "Celtic Languages in Historical and Contemporary Perspective"

From the mystique of the Arthurian Romances with its knights, swords and Camelot, to the scenes of contemporary Neo-Druids holding their white-robed ceremonies at Stonehenge, or the macabre images of the Wicker man, burning to propitiate the ancient gods, the Celts have about them an aura of the mysterious, the romantic, the sinister. Even among linguists the Celtic languages have something of a reputation for being "exotic" with their strange word orders and initial consonant mutations. Yet the current social status and future prospects of the Celtic languages are far less romantic and exotic, for indeed, like many or even most of the minority languages of the planet, the Celtic languages are all endangered, to one degree or another, as their speakers embrace a present and future that looks more successful through the lens of English or French. In this talk we will explore some of this ground together, from the record of the Celts in Antiquity to the current position of their languages as endangered languages of western Europe.

Date:
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Location:
J.F. Hardymon Theater (Davis Marksbury Building)
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Polly’s Bend: Initial Conditions

South of Lexington and north of Danville, Kentucky, the Kentucky River makes a major turn from a generally SW to NW direction. Shortly downstream, there is a compound “gooseneck” meander bend called Polly’s Bend.

Google EarthTM image of Polly’s Bend. The maximum width from tip to tip is ~ 5 km.; minimum width of the neck is ~ 350 - 400 m. 

While not the norm, such tight bends are not uncommon in winding alluvial rivers, and will eventually be cut off during a flood, when the channel cuts across the narrow neck. Polly’s Bend, however, is entrenched in bedrock. The narrow neck (and the rest of the bend) has more than 100 m of solid limestone bedrock to cut through. So a classic meander cutoff, with flow going overbank across the neck and cutting a new channel; that ain’t gonna happen.

Shaded relief map of the Kentucky River gorge area in central Kentucky, from an earlier report on evolution of meander bends in this area. Bends 13-16 comprise Polly’s Bend.

Year of Europe Kickoff

View photo's of our kickoff event for the Year of Europe! HERE

Passport to the World Program enables the College to embark on yearlong explorations of the culture and history of a particular region or country. The program engages our community in crucial global conversations through public lectures, cultural events, courseworkand travel opportunities. After past programs with South Africa, China, Russia's Realms, Mexico, and the Middle-East. A&S is shifting its focus to Europe for the 2015-2016 academic year with Crossroads of the World!
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Memorial Hall Lawn

Romantic Geomorphology, part 2

This continues my previous post, toying with the notion of what a Romantic geomorphology would be like. This is based on the Romantic movement in art, literature, and science, rather than the more common meanings related to amourness and love, or to unrealistic idealism. Though, come to think of it, maybe Romantic geomorphology in those terms is also worth thinking about . . . .

Anyway, in the earlier post I noted that Daniel Gade’s book, Curiosity, Inquiry, and the Geographical Imagination (Peter Lang publishers, 2011) proposed 14 tenets of the Romantic imagination as it relates to research. Eight of them, in my view, apply readily to geomorphology and geosciences in general, though certainly not all practitioners display or even aspire to all of these traits.  Six others need a bit more dissection.

Search for the Exotic

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