Forest Health

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Tall trees blue sky

Forest Health

Forest health is a common priority for landowners.  While an appropriate amount of dead wood is healthy for your forest, excessive amounts of dead and dying trees threaten the benefits that forests produce and can inhibit the forest’s ability to maintain itself. Below are some of the most common threats to the forests of Massachusetts.

Forest Conversion

The average age of a forest landowner is almost 65 years old. We are in the midst of the largest inter-generational transfers of land that our country has ever seen.  Forests are vulnerable to conversion to other land uses and properties to parcelization at times of ownership changes.  The most important forest stewardship action you can take is to develop and implement a conservation-based estate plan. Without forests there are no forest benefits. Keeping forests as forests maintains all the forests benefits and forest stewardship options.

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Invasive Insects

Global trade has led to the establishment of forest insects from other parts of the world that share our climate.  Since these insects didn’t involve in our native forests, our trees don’t have adequate defenses and there are often no natural predators, leading them to become highly destructive.  Invasive insects often feed on particular tree species, selectively removing that species and their benefits from our forests and decreases the forest’s resilience. Below is a list of some of the most damaging forest insects.

Asian Long-horned Beetle 

Beech Blight Aphid 

Emerald Ash Borer 

Hemlock Woolly Adelgid 

Southern Pine Beetle

Spongy Moth 

Spotted Lanternfly 

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Non-Native Invasive Plants

Global trade and the nursery industry have introduced non-native plants into our region.  While many of these non-native plants are innocuous, some of them demonstrate characteristics such rapid growth, high seed production, and leafing out in the spring before trees which make them invasive.  These non-native, invasive plants have shown themselves to be highly successful in our forests at the detriment of our native plants and animals.  Non-Native, invasive plants can take over a forest understory and overstory, making the regeneration of native plants and trees challenging and reducing the quality of habitat and food resources for native insects and animals.  The earlier you can identify non-native, invasive plants in your forest, the more options you have to control them and the greater likelihood of success, so get out in your forest. Below are some resources to help you develop a strategy to address non-native, invasive plants in your forest.

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White-tailed Deer

Though white-tailed deer are native to our forests, their populations have increased dramatically due to a lack of natural predators, lower hunting pressure, and an increase in habitat and food as forests are converted to landscaped houses. Deer overpopulation leads to excessive herbivory in our forests, making it difficult for native plants and trees to regenerate and grow.  In areas of high deer populations, there are is no understory and young trees.  A forest’s ability to regenerate itself is essential to sustaining forests and the benefits they provide.  Below is information to help you estimate the impact of deer on your forest and options for protecting regeneration.

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Earthworms

In an agricultural setting, earthworms can be a benefit, however, in a forest, they have the ability to reduce the organic matter in the leaf litter, altering the soil structure and chemistry in forests and leading to increased soil erosion and nutrient loss. Recently, invasive jumping worms have become a concern.

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