Showing posts with label migration. Show all posts
Showing posts with label migration. Show all posts

Thursday, June 23, 2011

Decreasing population, increasing density

The Institute where I work is built on land that used to be part of huge East German ship building facility. The facility folded shortly after the German Democratic Republic did. The buildings were, for the most part, left derelict. One of the former factory buildings has been converted into an indoor shopping center. Each store is its own single story box built into the bottom of the cavernous factory building, with walkways and cranes still hanging overhead. Most of the other buildings have been torn down, and ~15 waterfront apartment buildings have been built (or are being built) on the land, most just within the two years I have been here. Apartments in these new buildings are on the expensive side for Rostock, but are filling up fast. One or two huge windowless cement monstrosities (one holds a dance club called The Bunker) remain, as well as a couple of older brick warehouses that have been refurbished. One is being used as a temporary home for the Rostock Volkstheater (community theater) while their main hall is closed for fire-code violations. It feels as though a new, fairly fancy, neighborhood is simply sprouting from the root-system of the old shipyards, among the remaining shells, foundations and train tracks to nowhere.

The demand for housing that fuels all this building is a story of migration. Rostock is Mecklenberg-Vorpomern, the least densely populated state in Germany, and a state that has steadily lost population since reunification. Many of the outylying villages are dominated by abandoned buildings. Apartment complexes on the outer edges of Rostock, plunked down in the middle of fields by the communist planners, now offer multiple months of free rent to anyone who will move in and still are emptying out. Rostock is full of college students, who don’t want to be on the outskirts in half empty buildings, and an aging population of long-term residents, who don’t either. The more abandoned the outskirts get, the strong the incentive to move toward the city center. So the center of Rostock is becoming denser even as the state loses population.

Wednesday, January 05, 2011

The dead blackbird thing.

Much has been made of the news that 5000 dead blackbirds fell from the sky onto a small Arkansas town at the turning of the year. ~11:30PM on New Year's Eve. Conspiracy theories and omens abound, but I will propose my own theory: a conspiracy between fireworks and the migratory behavior of blackbirds.

There are several species of blackbirds in North America (e.g. Red-winged Blackbirds, Grackles, Starlings), that tend to migrate in large mix-species flocks. And when I say large, I mean blot out the sun, river in the sky, ornithophobe's nightmare large. Frequently in the hundreds of thousands, not rarely in the millions of birds. I was working at the Long Point Bird Observatory (in southern Ontario) one day in late November when one of these blackbird flocks went by, too thickly to count, for an hour and a half. As soon as we saw them we rushed out and closed the mist-nets we had put up to catch birds. While these nets work well for catching a flock of a dozen chickadees (which we would then measure, band and release), a thousand blackbirds hitting the nets all at once will collapse them, potentially killing large numbers of the birds. Many of the nets had several dozen blackbirds in them within the first minute, and it was a struggle to free them faster than new birds got caught. We couldn't close the nets until they were empty, and we couldn't stop catching them without closing the nets, so thick and fast they came, despite the fact that the main stream of birds was far above our heads, and despite each bird tending to avoid places where humans were standing. We put brightly colored cloths in the nets to make them more visible, but still we couldn't keep up. The nets began to sag under the weight of birds, each of which weighed only a few ounces. Only when the course of the avian river shifted significantly to one side were we able to empty and close the nets, and then stand and gape at the immensity of the flock. That night they all settled in a nearby wetland, densely and within a surprisingly small area.

Now by New Years Eve, these flocks would not be in Ontario, but in places more like Arkansas. It is reported that a wooded area in Beebe was being used as a nighttime roost for several hundred thousand blackbirds. My guess is that somebody was setting off fireworks near that wood, and scared the bejesus out of at least half a million blackbirds. Fireworks are used in agriculture to scare blackbirds out of fields, and to uninitiated birds, they are quite terrifying. So this river of blackbirds leaps into the air whirl around and around as the rockets and fountains go up. Now blackbirds, like most songbirds, have very poor night vision, and frequently smack into things if startled up at night. So maybe one in a thousand in the whirling disoriented mass smacked into a lamp, a sign, a building, each other. They go quite fast enough to kill themselves crashing headlong into hard objects, and can rebound several feet. The birds seemed to have died of blunt trauma, as from a crash.

Or it could be a sign of the end times.