@farmerman,
ANother story of adaptation involves a mine cleanup my guys did about 20 years ago. It was an early 20th century zinc mine and smelter in Eastern Pa. The site was located in a large fold belt of the front hills of the Blue Ridge and the old mine had smelted zinc from the mid 1800's to the early 20th century. The smelting operations left bazillions of tons of zinc oxide dust all over the surrounding mountains. Zinc Oxide is a super bacteriostat. SO the hills, no longer able to process dead leaves and trees, just became a sterile dead zone. Trees require nutrient exchange and this bacteriostatic action had renered the soil a lifeless collectio n of duff. We actually took dead trees and did sequential ring analyses and could see the three critical years where the forests died. This entire area was moonscape of red and yellowish bedrock hills and looked vaguely like the badlands of the dakotas.
Well, we did a study to mass load the area with seqwage sludge in order to override the remnant bacteriostat effects and to kick start the soil bacteria into getting back to work decomposing the floor of the old "mummy" forest.
We contracted wits sveral cities including Philadelphia to bring thousands of truckloads of sludge. We had a soil mixer where we added coal fines to adsorb the toxic metals and then spread the sludge in plots of 100 acres by 2 ft deep (200 acre feet per section). It took about a month to do one section and the study was tuned to monitor the composting and reclamation effects. One of the most surprising events was the rehabitation of the mountain.
1WHen we deposited the seage sludge, there was a huge component of undigested seeds that came with the sludge. The biggest percentages were TOMATOES. Wed set up a large 3 to 500 acre tomato field that was producing nice tomatoes the first year. Our ecologists were going nuts because the tomatoes had drawn in several species of mouse and rat that were native to the area. In 2 years the rodent population exploded as generation 2 of the tomato fields were growing.
With the exploded rodent population, this area, already an important hawk flyway(HAwk Mountain Pa is 40 miles to the west of this site on the same ridgeline). The kestrels and merlins simultaneously set up major housekeeping and this condition lasted for several years until the tomato garden began to be succeeded by small birches and sumacs (all part of the Appalachian succession seuence). The project was a success and the whole mountain was scheduled for reclamation . The same process of "Tomato seres" were initiated in the next sevral reclamation areas.
We can set up a site conition and , good or bad, our actions can have sometimes beneficial consequences in the ecosystem.