Author: David Gorsline

Stopper

Hugh Powell reminds us of the connection between wine bottle closures and the preservation of biodiversity. Cork prices are crashing, which threatens cork oak plantations on the Iberian peninsula.

Cork trees live for about 250 years, growing in open groves interspersed with meadows of tawny grasses and diverse wildflowers. Once a decade, skilled workers with hatchets carefully slice off an inch-thick jacket of bark, leaving the tree to grow it back. There are cork farmers right now slicing cork from the same trees that their great, great, great grandparents harvested. In all, some 13 billion corks are produced each year, slightly more than half of them in Portugal and the rest in Spain, France, Italy, Morocco, Algeria, and Tunisia. It’s a $2 billion industry.

The skilled labor pays well, and the farmers can also keep livestock on the land. While they’re at it, the farmers keep a delicate balance in their forests, avoiding overgrazing but keeping shrubs from taking over, setting controlled fires and putting out fierce ones.

Among conservationists there’s a real fear that as cork prices fall, the cork oak forests will deteriorate or be converted into eucalyptus plantations or Mediterranean resorts.

Inconclusive

Morgan and Rego challenge the claims by Reichheld and crew that Net Promoter Score is the single customer satisfaction metric necessary to explain business performance. While their peer-reviewed work does identify measures (e.g., Top 2 Box Satisfaction) that do correlate with short- and long-term success (Tobin’s Q, market share, etc.), their computation of “net promoters” is flawed: it is only a rough approximation of the ratio promulgated by Bain and Satmetrix, based on the “how likely to recommend” 0-10 scale. This shortcoming in the work is pointed out by Timothy L. Keiningham et al. Nevertheless, that follow-up note says

Despite the problems with the Net Promoter and Number of Recommendations metrics, Morgan and Rego (2006) have provided valuable insight regarding the relationship between business performance and other commonly used customer metrics…. We are unaware of another longitudinal study that examines the predictive value of satisfaction and loyalty metrics in such a comprehensive way.

And five years after the publication of The Ultimate Question, I’m waiting to see independent research that backs up its claims.

American Chestnut Land Trust

easy swervesSunday was a near-perfect day for a field trip to the Parkers Creek section of the American Chestnut Land Trust property in Calvert County on the western shore of the bay, led by Stephanie Mason. Chesapeake Bay’s not really visible from trails on this property, but you can sense it from the end of the Turkey Spur Trail.

up that hillWe had the place nearly to ourselves. For a Coastal Plain site, the walking is remarkably hilly.

It was a middling day for birds. We watched a Green Heron stalking its lunch on Parkers Creek; had good looks at Prothonotary Warbler, Scarlet Tanager, and Northern Parula; heard Ovenbird (frequently), Wood Thrush, Hooded Warbler, Worm-eating Warbler, White-eyed Vireo.

not a logAt the lunch break, a skink mistook Ethan’s trousers for an extension of the log he was sitting on.

Some nice butterflies: Spicebush Swallowtail, several Zebra Swallowtails, and two Vanessa species, an American Lady and numerous Red Admirals.

watermarkSome good flowering plants to look at: the place is covered with Virginia Waterleaf (Hydrophyllum virginianum). Stephanie explained an concept that I hadn’t latched onto before, the difference between a determinate inflorescence (the plant decides how many florets to make and it’s done) and an indeterminate inflorescence (flower ’til you drop, like we saw with Mysotis).

brown rachisit makes a lovely lightAnd some great ferns. The image of Ebony Spleenwort (Asplenium platyneuron) at the left is an attempt to show the dark brown rachis. New York Fern (Thelypteris noveboracensis), at the right, tapers to a point at both ends, like a New Yorker burning his candle. Hay-scented Fern is the other species in our area that forms large clonal colonies like New York Fern.

chain chain chainStephanie made the call on this Netted Chain Fern (Woodwardia areolata), which is very similar in appearance to Senstive Fern. I need to learn to look for fertile fronds when I’m looking at ferns.

In search of a problem

New words acquired via studio reading: a couple of intermodal transportation schemes that don’t appear to have moved beyond the coinage of cutesy names: fishyback and birdyback.

Fishyback service is named by analogy with piggyback service, and consists of carrying loaded truck trailers on boats or barges. The top search results that aren’t definitions are newspaper clippings from the 1950s—and the textbooks where I read about it in the first place. Perhaps the transportation scheme was pushed aside in favor of the containerized shipping that we know today. I did find an Egyptian shipping company that advertises the service.

Birdyback intermodal transportation is the same idea, but with the trailer carried by a cargo plane. Presumably in the cargo hold, not Space Shuttle-style.

Supercaliflawjalisticexpialadoshus

Ben Zimmer antedates the Disney team’s most famous nonsense word, precious to user interface designers and testers worldwide, made canonical by Henry Spencer’s decalogue. With the primary accent on the “flaw,” the word appears in a 1931 humor column for a Syracuse University student newspaper under the byline of Helen Herman.

ᔥ Languagehat

At the park: 50

a smaller, muddier oneTwo trips to the park not to check nest boxes (though we did check a couple), but rather to assist Kat, who is surveying crayfish activity. We went 0-18 on the smokestack traps, but negative data is still data. And the reptiles and amphibians provided some alternative entertainment.

hoistShe has been using submerged basket traps like this one, baited with an opened can of sardines. But she was interested in finding other species, ones that don’t spend all their time in the water.

tulle tooltrap setThis weekend’s project was to trap crayfish in their burrows. The plan was to use a bit of fine mesh, attached with string to a bit of dowelling. Insert the mesh into the burrow, wait overnight, and pull up a critter in the morning. Unfortunately, this morning we found no crayfish entangled in the mesh. Instead, we found a couple of our traps pulled completely into a burrow and out another entrance. And one trap went missing altogether. Maybe one day it will turn up incorporated into an Osprey’s nest.

Meanwhile, songbirds are actively nesting. Great-crested Flycatchers and Red-eyed Vireos were audible; a Blue-gray Gnatcatcher is nesting in full view of the boardwalk, at the first wide spot. And Prothonotary Warblers (Protonotaria citrea) are active! Nests (probably dummies) are being constructed to the right of the trail, just after the fork and before it enters the wetland.

The beavers continue to work on dams at the upper end of the wetland. The past month’s dry conditions have dropped the downstream water level; the gauge reads only 0.28 m.