Showing posts with label forest fragmentation. Show all posts
Showing posts with label forest fragmentation. Show all posts

Sunday, March 17, 2013

Deer, Drilling and other Wildlife Considerations

Page 40 in Mar 13 Mulligan Shopping Guide


In a recent gas industry ad, hunter and sportsman Alan Probst proclaims that natural gas drilling will benefit wildlife.

On the one hand, he’s right. The pipeline right-of-ways that cut through forests, will need to be kept free of trees for as long as the gas shall run. And as all deer hunters know, those right-of-ways make great habitat for deer.

What he doesn’t say is what everyone already knows: we already have too many deer for the hunters to keep up with, and that deer population has tremendous and far-reaching impacts on our forests.

If you grow a garden, or walk in the woods, you already know this. When is the last time you saw young tree seedlings in your woods? According to Bernd Blossey, associate professor in Cornell University’s Department of Natural Resources, it takes ten years for an oak seedling to grow tall enough to survive deer browsing. Most don’t make it past two.

He cites a research project in the Allegheny National Forest that demonstrated some of the impacts of deer on the landscape. Instead of excluding deer from areas, scientists enclosed deer inside of fences. That way they could control the population density of the herds. After tabulating tree regeneration for a decade the researchers found a clear relationship between deer pressure and the diversity of trees in their enclosures: a more diverse population of tree seedlings grew where there were fewer deer; more deer led to a less diverse forest.

Bad enough news for those depending on the back-forty woodlot to regenerate itself in a sustainable manner for the next generation… But the impacts go beyond timber interests. The researchers also looked at caterpillar populations in the various enclosures. Where the deer density was low, there was a high population of caterpillars; more deer meant fewer caterpillars. And that has huge implications for the forest-dwelling birds that depend on caterpillars to feed their nestlings. Some studies find an abundance of birds in the forest canopies, but few in the mid-story and shrubs.

And aren’t birds wildlife too, Alan?

Thursday, November 11, 2010

Drilling is Not Compatible With Multiple-Use State Forest Mandates

Allegheny National Forest (Allegheny Defense Project)

The New York Department of Environmental Conservation (DEC) manages more than 785,000 acres of state forest. These are lands that are managed for multiple uses including timber harvest, recreational activities, conservation and, if the strategic plan is adopted, gas drilling.

Problem is, industrialized gas drilling isn’t compatible with other forest uses. Just ask Bill Belitskus, president of the board for the Allegheny Defense Project. The most visible impact of drilling, he says, is the explosion of access roads and pipeline right-of-ways criss-crossing the forested hillsides.

Drilling relies on a massive road system to bring machinery, rig parts and water to the site, and a system of pipelines for getting gas to market. Each of those road cuts and right-of-ways slices the forest into smaller and smaller fragments.

Pennsylvania’s Allegheny National Forest is home to 12,000 - 15,000 shallow gas wells, and companies are now applying for Marcellus permits. The larger pads and wider roads, built to accommodate heavier trucks, will only exacerbate the fragmentation, Belitskus said.

Belitskus tallied up the acreage used by drilling at one site: 5 acres for the pad, a 10-acre fresh-water impoundment, a 1 – 2 acre frack pit and land for the access roads adds up close to 20 acres. Given the industry’s projection of 30,000 new wells in PA by 2020, he worries the disruption on the landscape will be significant and long term.

“Right now they’re drilling anchor wells,” Belitskus said. This is when a company drills a single well on a unit and then packs up their gear and heads to another unit to drill a well.

The strategy, Belitskus explained, is to get a hole in the ground and then hold the leases “by production” until they can get back to complete their drilling. That might take ten years, and the companies don’t have to do any remediation until they finish drilling activities.

How does drilling impact other forest uses? Stormwater runoff from road and well pad construction adds sediments to trout streams. Lowered oxygen levels and increased pollutant levels can reduce fish populations and, in the case of sensitive species, kill them outright.

from Allegheny Defense Project
Road and pipeline right-of-ways provide corridors for invasive species that change the character of the forests and affect timber harvest, sugaring and mast production for wildlife. Birds and other species that require large areas of continuous forested land are put at risk.

And then there’s recreation. Shellie Northrup, an avid hiker and member of two trail associations, says hikers report coming across flaring wells, piles of tree trunks blocking trails, and well pads that obliterate paths. Drilling affect the aesthetics of an afternoon hike, and presents a safety hazard when sharing public lands used for recreation. 

Read more about Allegheny Defense Project here. You can read a longer article from the print edition of Broader View Weekly here in a couple weeks.

Sunday, December 6, 2009

Fragmenting the Agricultural Landscape one Well at a Time


For most of the farmers in our area - upstate NY perched atop the Marcellus - oil and gas leases have been part of the business since their grandfathers pounded in the first fenceposts. But with a huge reservoir of natural gas beneath their hayfields and forests, and bonus payments heading north of $5500/acre, leasing has become the number one rural land-use issue says Brett Chedzoy, a regional forester with Cornell Cooperative Extension.

Chedzoy, who is also a farmer, speaks from experience. His  livestock operations have been interrupted not once, but twice for  gas pipeline construction projects. Without proper lease protections, farm and forest owners face potential losses in terms of timber, wildlife habitat and other property uses, he says.

If a gas company wants to use your land for a drilling pad or as a right-of-way for a pipeline, they ought to pay fair value for all timber removed from your land, Chedzoy says. Even young successional forests have value. An 8-inch tree may have current value only as firewood, but if left for another 50 years it would have significant value as a saw log.

The problem, Chedzoy says, is that too often energy companies use bulldozers to clear land. That leaves downed trees mixed with stones and debris - unacceptable to a mill or to someone using a chainsaw. Instead, trees should be cut by an experienced logging crew and stacked in an accessible location

As with fields, forest owners need to protect their topsoil, restore drainages, and control erosion. Once construction is completed, the soil needs to be de-compacted. Then the topsoil should be replaced and – especially if the area will be maintained by brush-hogging – make sure that the rocks and stones are picked out. Unfortunately, some farmers say that even when these items are outlined in their leases, the gas companies are not following their directives.

Pipeline Right-of-Ways

Access roads and well-pads are not the only threat to agriculture. According to Chedzoy pipeline right-of-ways (ROWs) are the number-one entry point for invasive species. Once you take out the trees, you create an “edge” – an opening preferred by such invasive species as European buckthorn, multifloral rose, privet, several Asian species of honeysuckle, burning bush, Japanese barberry, autumn olive, swallowwort, Oriental bittersweet, and garlic mustard.

The problem with invasive species is that they interfere with native plants and degrade the wildlife habitat. Take buckthorn, for example. It displaces other berry-producing shrubs such as Viburnums and blackberries. and the buckthorn fruit isn't very nutritious for the animals; it causes them to vomit the fruit without digesting any nutrients. This is great for buckthorn dispersal, but not very beneficial for the wildlife.

Invasive plants also affect the quality of the forest. The more competitive invasive plants may shade or crowd out the existing seedlings and saplings, changing the character of the woods. Or, like garlic mustard, they may produce chemicals that inhibit seed germination.

Pipeline right-of-ways also create other problems for forest owners. Landowners needing access to their forests for timber harvest will want to make sure there are permanent crossings for skidders and other heavy equipment. Otherwise forest owners wanting to sell a few trees may find themselves required to provide a “timber bridge”.

Trespass liability has become an issue as well. Many forest owners have complained that pipeline ROWs become conduits for ATV and snowmobile traffic.

Cumulative impacts

David Behm, NY Ag and Markets Farmland Protection Program Manager, is concerned about preserving agricultural land for future generations. He wonders whether conservation easements will be strong enough to protect farmland in the face of the anticipated natural gas rush.

A conservation easement is a legal document that is written in the form of a deed. It permanently restricts the future development of a piece of property for the purpose of preserving or maintaining the scenic, open, historic, agricultural, or natural condition, character or significance of that property. And, Behm explains, it can be modified to allow a well.

Thing is, while a single well on a farm doesn’t seem like a huge impact, Behm is concerned about the cumulative impacts of gas development on a given agricultural landscape over time. He believes that access roads to well sites will fragment the agricultural land. 

"Anytime there’s a road dividing a field, agricultural land is at risk," Behm says. He is particularly concerned about access roads that cut off a couple acres from a larger field – those smaller pieces are at risk for development, Behm says. You can read more about forest and ag-land issues here.