Showing posts with label Oppiella nova. Show all posts
Showing posts with label Oppiella nova. Show all posts

Thursday, December 6, 2012

Thoreau and a common soil mite

Main theme of my City Creatures essay:

From Thoreau environmentalists have inherited an inclination to inspect matters from the periphery — the perspective of cordial criticism — as Thoreau did from the vantage of Walden Pond on the outskirts of Concord. The environmental tradition has also inherited a regard for inquiring into necessities, now translated arguably into sustainability studies, a disposition toward minute inspections of the workings of nature, and an amplified sense of the affiliation between people and the wild, even if Thoreau had, at times, a tendency to view his neighbors with a jaundiced eye. In other ways, though, the environmental tradition has veered from Thoreau’s path. Though it is true that Thoreau famously walked out of town, finding, he declared, little of interest in that direction, nevertheless, Walden Pond is no glacial wilderness, it was merely a walk away from home, from town, and from the neighbors. An ecology of the urban environment had to wait for well over a century to emerge, even though in some respects Thoreau’s Walden is the first volume of suburban ecology. He provided, by way of illustration, detailed notes on the domestic cat who appeared quite at home in the woods. Perhaps the most significant departure from Thoreau’s legacy, however, is the bewitchment, in the modern times, with the ecologically exotic, the cultivation of uncommon experience and the infatuation with the rare. Rarity, of course, is the appropriate focus for conservation biology, since rarity is an excellent predictor of vulnerability to extinction. That being said, Thoreau’s genius for the ordinary may be worth emulating. In the “Brute Neighbors” chapter in Walden, he described a relentless battle between two species of ants, the sort of violent encounter that is infrequently observed and almost never recorded though, presumably, occurs all the time. What Thoreau’s account suggests is that if we look closely enough we find that the rich dramas of nature are right at our feet, even if this place is not very ecologically distinguished. One does not need to peregrinate in remote parts to give witness to the marvelous.

I am not especially concerned in what follows with reinvigorating a Thoreauvian approach to ecology. I simply want to suggest that right here, under our noses in the towns and cities where most of us live these days, there exist ordinary marvels if we only know where and how to look for them. There is, let me suggest, another form of rarity - rarity of experience, and a poverty in our attention, that may not be fatal but that is unfortunate and consequential. O nova can serve as a mascot for this different form of rarity: it is common but unfamiliar. That most have not seen it is by virtue of its cryptic nature forgivable, but that despite its ubiquity most, I suspect, know little about this species, needs rectification.

Outline of the full essay is here.

Outline of Essay: Being Unseen: the Gift of Oppiella nova


I
A strange gift from John Lussenhop – small colony of O nova
Commonest animal in terrestrial ecosystems
My first encounter with this animal 20 years earlier
Common but rarely analyzed.
Introducing main themes of essay: necessity, minute inspection of nature, amplified connection between humans and nature, commonplace rather than rarity.  Connection with Thoreau!

II
Classification of mites
Morphology
Predation on mites (ghoulish story of beetles feeding on mites)
Diversity of community
            Poor man’s tropical rainforest
            Illustration of temperate zone diversity
            Enigma/Enigma resolved
Ecological role of mites

III
Specifics on Oppiella
Diagnostic characteristics
List of exotic locations where it’s found
List of less exotic locations
What is known ecologically
Aggregation patterns
A lone O nova shows up at the mall!

IV
Association with people
No comprehensive studies of urban populations
Project with Amanda Henderson :Great Oppiella nova census 2013
22 billion O nova in Lincoln Park?
Hypothesis: diminished population because of leaf removal

V
Conclusions
Necessity: means essential but also intimately connected, rendering of serves
Broader concept of necessary

~3000 words

Tuesday, October 23, 2012

Great Oppiella nova Census 2012: Kerosene Extractions


Sample Kit (these are available at the Env Science desk if any DePaul students want to help us sample for this project.)  Please contact me at lhenegha at gmail.  Or drop by 203 McGowan S.


DePaul Undergraduate Amanda Henderson taking sample in DePaul Urban Garden



Sample transferred into contained in lab (stored in 70% alcohol until critters can be extracted)


Sample is sieved in 150 u sieve - retaining mites but getting rid of small particles.


Small amount of kerosene added to sample - the soil critters float in kerosene.  Other parts of sample settle out


Rotating sample to mix the kerosene throughout the sample



Kerosene and arthropods are pipetted into sieve and rinsed in ethanol and placed in petri dish 


Amanda inspects sample under binocular microscope.

Oppiella nova - pictures taken in a previous photo shoot in the Heneghan lab.

For more on this project please visit here