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#cities

1 post1 participant0 posts today
David Zipper
Public

Seventy years ago, the writer Lewis Mumford warned that urban highways would be a disaster:

“This is pyramid building with a vengeance, a tomb of concrete roads and ramps covering the dead corpse of a city.”

He was right. We just didn’t listen.

My homage, in Bloomberg CityLab:
bloomberg.com/news/articles/20

#cities#history#highways
Petra van Cronenburg
Public

I had some time to spend in a small town. People watched me as if I were "not normal". Well, I was so fascinated about the biodiversity of lichens and mosses and what they told me about the weather and air quality!
(Is it normal, to walk through a city without regarding mosses and lichens???)
More in alt texts and about the "alien" Nostoc (pic 2) here: cronenburg.net/nostoc/

A typical city lichen: whitish-grey to greenish grey it builds rings and circular "nests" on stone like car parks, terraces, balconies and even concrete floors. It can remain completely dry for months and freshens up when it rains. And it does not damage the surface at all. You don't have to kill it! These lichens survive even very bad air. They also like NO2 overfertilisation. Therefore they are very typical for cities.
An alien that you find only after heavy rainfalls: It looks glibbery, like black-dark-green jelly. It is scattered loosely over stone floors or paths, here on concrete pavement. The alien is called Nostoc.
When people don't wash their cars too often, you can even find this beautiful greenish-grey cladonia lichen growing in the window gaps on the insulation of a red car.
A concrete pillar holding a garden gate. Especially on the edge, a mixture of very flat lichens and mosses growing in between. Even on raw reinforced concrete, nature can survive: first simple lichens settle on the weather side, followed by lower mosses. These in turn later provide support for larger moss cushions. One helps the other ...
#moss#lichen#biodiversity
*
michael
Public

new #Introduction for the bsky bridge : I’m a #BioChemist turned #ScienceWriter, write a feature for every issue of #CurrentBiology, 2/month, mostly about #ecology #evolution #environment also #human, #cultural things seen thru #biology prism. Plus #ScienceBooks, most recently: #Intertwined: From insects to icebergs Also writing a #musical #FamilyHistory #memoir around #biography of our old #cello. #PirateLuthier fixing unloved #violins #NoCars #cycling, #trains, #liveable #cities #townmouse

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