Avalonia eTrails: The Greening of Hoffman Preserve

By Beth Sullivan

It was a long winter, but we planned and had hopes for spring. Somehow, (we know how) our best plans for being organized and meeting and having groups together to get work done in the spring, never materialized. Some of us hiked; many of us researched; all of us thought a lot about what would be our next steps for the Hoffman Preserve.

We found some interesting research about planning our forests for the warming future. Where we live now could become much more like the climate of Maryland in another generation or two. In the mid 1900’s the preserve was planted with conifers: hemlock, pine, and larch, to re-create a northern forest habitat. We have the opportunity now, to think about a more southern forest, and if we choose to help mother nature, we may direct our thoughts to trees and plants that will thrive in the coming warmth.

With more sun this hemlock has healthy new growth.

A young white pine seedling will have no competition to grow tall.

New sights to see

Since the weather has warmed up, several of us have taken the opportunity to hike out and around to really explore what is happening since the project was completed last year. One thing we noticed was that everyone else was out exploring too. The preserve is getting a lot of visitors, and the good thing is that people are beginning to get a little idea of what we were aiming for. The new signs helped, too.

The first thing we notice is how much more light there is. Even with the leaves emerged, there are big bright sunny patches and places where the sun streams in at angles, creating some great atmosphere. You can also see the tops of the trees. No longer do you walk among trunks, but now you can admire the tallest of trees.

The birds also enjoy those open patches of light. Even the true forest dwelling birds like to come out to the edges, to the light, because that’s where they can find insects. The sunny patch cuts are now swarming with all sorts of flying insects, including different butterflies and dragon flies. Those aerial insectivores, like flycatchers and swallows have found themselves better hunting grounds. For the first time we have had bluebirds on the preserve. They nest in cavities. Over the past many years, with many trees dead or dying, woodpeckers have created numerous inviting spaces for those birds to claim. Chickadees, titmice, and nuthatches use holes as well, and their numbers have increased.

While there is still a lot of messy-looking wood on the ground, from branches and tree trunks that are still breaking and falling, that coarse woody debris is essential for so many reasons. It creates numerous nooks and crannies for all sorts of wildlife. We also have begun to create brush piles to tidy up a bit, but also to provide habitat. From medium-sized mammals like opossums , to chipmunks and mice, there are plenty of spaces to hide. Birds like wrens and sparrows will find shelter among the tangles of branches and will find plenty of insect food. As the wood decays, there are all sorts of insects, especially beetles, and other invertebrates, that come to feast on the rotting wood. Amphibians, particularly salamanders, rely on the damp dark areas under wood to find food and shelter. All the way down to the smallest organisms-bacteria and fungi-the soil under the old wood is alive.

There were many places in Hoffman, before the project, where the forest floor was barren. There was no understory and no diversity to support so much life.

Small mammals will have more places to hide in brush piles. Photograph by Rick Newton.

A garter snake has more sunny patches to enjoy.

Flycatchers are more abundant as they can find insects in the sunny openings.

New life to see

New life is most apparent in areas where the forest had been somewhat diverse before. A forest with a mix of tree species and shrubs in the understory will have a greater seed bank, which is years of seeds lying dormant in the soil, waiting for an opportune time to sprout. That time is now. A small lowbush blueberry that struggled in the shade has now sent out runners and spread its clones and offshoots in all directions, creating greater patches of green. These bushes already flowered and are developing berries for maybe the first time in decades. These berries will be available for many different birds and mammals later in the summer and fall. We lost many oak trees to drought and gypsy moth devastation in the last several years. In the open areas there are many, many seedlings sprouting from acorns produced before the trees died. Maybe when they are old enough, there will be a control for gypsy moths . We have to hope they can adapt to a changing climate.

Many of the trees that were cut to harvest are also re-sprouting from their stumps. This is most noticeable in the red maples where the young leaves crown the stump. Over time the strongest will survive and a multi-trunked tree will thrive.

We may have to help Mother Nature along in places where the very dense shade of the hemlock groves had no diversity and no seed bank. But that is the fun of watching and waiting. There is always something new to see there. We invite you all to enjoy the changes, take pictures, send us your observations, and watch the rebirth of the Hoffman Preserve.