The Hiding Place

 

For decades now, when gardeners needed a windbreak or a privacy screen they have resorted to planting hedgerow monocultures of a few relatively fast growing evergreen species, among them the Leyland cypress. For some who prefer a more formal, planned look, that plan has sufficed, but others might look at such a hedgerow as boring and as a lost opportunity to bring more wildlife into their gardens. Planting with wildlife in mind takes a generous spirit, particularly for the gardener who is also trying to raise fruits and vegetables for their own consumption. There are trade offs and compromises involved.

One of the problems with a hedgerow monoculture occurs when one or more of the plants dies, creating a gap that must then be filled with the same kind of plant, sometimes at considerable expense if the new plant is not to be too conspicuous by its smaller size. The gardener can feel trapped, and the trap can get more enveloping and add even more expense if the reason for a plant’s death is a disease or pest, engaging the gardener in an endless battle. Sometimes it can be a blessing when a disease or pest spreads quickly from one plant in the monoculture to the next, ending the battle with its consequent frustrations and expenses and presenting the gardener with a blank slate after a tree removal company has carted away the battlefield fallen.


Leylandii - geograph.org.uk - 146076
This colonnade of Leyland cypresses in England is presumably a windbreak for the greenhouses behind. Photo by Ben Gamble.

Instead of persisting in folly and boring landscaping, a gardener might decide it is wiser and more interesting to plant rows or clumps of a diverse assortment of trees and shrubs, more closely imitating nature. The gardener might look for evergreen trees for year round screening for the gardener and cover for wildlife; deciduous trees which with their tall, rounded crowns fill visual gaps between the conical forms of the evergreens, and add nuts and acorns for wildlife food; shrubs and small trees both evergreen and deciduous which give fruits and berries in different seasons; and finally a water source, preferably running rather than stagnant. That’s a privacy screen for the gardener and a home for wildlife, and it isn’t only for large properties, since there are almost always dwarf or semi-dwarf forms of trees available.

Inviting wildlife into the garden this way means being willing to compromise on the amount of produce left for the gardener, and also means protecting vulnerable young plants from the very same wildlife. This is a microcosm and an imitation of nature, after all, and not truly nature. In nature the loss of a few sapling trees here and there to deer browsing is not necessarily a catastrophe since there may be as many more that will survive to maturity. But for the gardener who may have space to plant only a few trees, the loss of even one young tree is important. An example would be the gardener who joins in the effort to restore the American chestnut to the landscape and helps the cause by buying and planting a few saplings at home. Unless that gardener cages the chestnut saplings for the first two or three years of their growth, deer will come along and browse the foliage and rub  velvet off their antlers using the trunks of the saplings, debarking them. Caging is the only truly effective way to get deer to leave the chestnut saplings alone until they are big and strong enough to withstand their attentions.

On a small lot in particular a gardener should not expect to get very many fruits and berries for their own consumption. Birds love eating the same things, and they are outside all day every day, watching for ripeness, and when it comes the birds get to the fruits and berries very soon. Netting is a nasty business that tangles up birds and other critters, killing them, and it has no place in a garden planted for wildlife. Either be content with gleaning a few fruits and berries here and there, or build a small greenhouse to grow a few protected plants. Gardeners with large plots of land have more options, both for the wildlife and for themselves. Plant native plants when possible, because they are better adapted to coexist with native wildlife. Once there are birds and frogs and other insect eaters living nearby, the gardener may actually find fewer pest and disease problems in the rest of the garden, and that alone makes it worth the trouble of devising a landscape scheme more varied and interesting than a soldier row of Leyland cypresses.
— Izzy

 

The Pigeon and the Chestnut

 

Scientists are attempting to bring the Passenger Pigeon, Ectopistes migratorius, back to life from preserved genetic material. The Passenger Pigeon once numbered up to 3 billion in North America, but by 1914 the last one had died at the Cincinnati Zoo. Scientists are also working on reviving the nearly extinct American Chestnut, Castanea dentata, which had once totaled over 3 billion trees in North America before a bark fungus accidentally imported from Asia with some Chinese Chestnuts, Castanea mollissima, destroyed almost all of the trees in the first half of the twentieth century.
Male Passenger Pigeon
Male Passenger Pigeon; digital painting by Tim Hough.
PSM V84 D563 American chestnut central maryland
American Chestnut tree in central Maryland in 1914; photo by United States Forest Service.
The loss or near loss of both these species greatly changed the ecosystem of eastern North America to the point that a visitor time traveling from the nineteenth century would be hard pressed to recognize it as the same place, never mind all the modern infrastructure of concrete, steel, and asphalt. Both species were casualties of the first stages of globalization. The Passenger Pigeons had co-existed with Native Americans for millennia, but it was the mass immigration of Europeans which eventually drove them to extinction through habitat loss and hunting on a massive scale. The American Chestnuts had no immunity to the fungus which arrived with the shipment of Chinese Chestnuts, which had developed some immunity due to having evolved with the fungus in their native habitat.

 

Now scientists are attempting to restore these two species once so numerous that they helped define the environment of eastern North America. Both restorations will require the expertise of geneticists, along with help from ornithologists and botanists, as appropriate. Ultimately the success of both projects will depend on the cooperation of the public by giving both species space and peace, two things that humans struggle to allow for the other beings sharing this planet. People were responsible for the demise of both the Passenger Pigeon and the American Chestnut, and with the ingenuity people are known for perhaps they can restore both species. Successful restoration will also require two things people have not often enough been known for, which are a generosity of spirit towards life and restraint of their violently destructive impulses.
― Vita