Tag Archives: habitat fragmentation

Wildness at stake

Debo Powers spotted this long, but interesting, article on the dangers of unconstrained growth in the Gallatin Valley. Many of the concerns,  lessons and hard choices are applicable to our region as well . . .

In the stillness of a summer morning, haze from wildfire smoke thickening the air, Randy Carpenter arrives for a hike up Sypes Canyon in the pastoral northern outskirts of Bozeman, Montana. Ascending into the Bridger Mountain foothills, we talk about how “crazy” it feels these days “in town”, how quickly new subdivisions are springing up in fields that a year ago were covered with wheat.

And then Carpenter starts in, reciting some jaw-dropping statistics that seem abstract until we reach an overlook and gaze clear-eyed into an uncertain future.

Before us, and stretching for nearly 40 miles to the next muted horizon is the Gallatin Valley, one of the fastest-growing semi-rural settings in America. Carpenter, known for his work as a career land use planner, says it won’t be long, given current trend-lines, before the vast chasm of space fills in with exurban development.

Read more . . .

Global study on habitat fragmentation shows widespread problems

Some more support for the importance of biological and botanical corridors and other efforts to reduce habitat isolation . . .

An extensive study of global habitat fragmentation — the division of habitats into smaller and more isolated patches — points to major trouble for a number of the world’s ecosystems and the plants and animals living in them.

The study shows that 70 percent of existing forest lands are within a half-mile of the forest edge, where encroaching urban, suburban or agricultural influences can cause any number of harmful effects — like the losses of plants and animals.

The study also tracks seven major experiments on five continents that examine habitat fragmentation and finds that fragmented habitats reduce the diversity of plants and animals by 13 to 75 percent, with the largest negative effects found in the smallest and most isolated fragments of habitat.

Read more . . .