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A Column Promoting a More Earth-Friendly Lifestyle

By John L. Turner

John Turner

During their lives trees perform functions critical to the health of forests and its wildlife — providing oxygen to the atmosphere for the benefit of all animals including humans, preventing soil erosion and helping to enrich and aerate the soil, and producing food such as nuts, fruits, and seeds that nourish many species of wildlife. 

In death, trees continue to serve vital ecological functions; as the wood softens and the bark peels away from the trunk, the tree creates nesting and roosting habitat as bats and many insects and other invertebrates seek shelter under the bark as does one bird, the brown creeper, which builds it’s crescent shaped nest under large pieces of bark. Woodpeckers have an easier time excavating cavities in the trunk creating nesting habitat for themselves and more than 80 other species of North American birds. These cavities are used by many other wildlife including reptiles, amphibians, and, of course, many mammals like raccoons and flying squirrels. Condominiums in the tree canopy are available to many! 

As the wood softens further, breaking down from the elements of weather, fungus, bacteria and insects, the standing tree becomes a cafeteria too. Woodpeckers chip away the softened wood to feast on beetle grubs previously hidden beneath the surface and mammals feed on several types of shelf fungus that sprout from the trunk like the well known chicken-of-the-woods and hen-of-the-woods, two delicious mushrooms that humans like too!

Given all the benefits of dead trees, which collectively help to stabilize local ecosystems, the message is obvious — if you have dead trees on your property located out of harm’s way from structures such as your home, garden sheds, and the like, let the dead tree give life. If you do, you might be lucky enough to see a roosting screech owl or a flying squirrel gliding from one tree to another in the darkness

A resident of Setauket, author John L. Turner is a naturalist, conservation co-chair of the Four Harbors Audubon Society, and Conservation Policy Advocate for the Seatuck Environmental Association.

 

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Unfortunately, dogs don’t consult the ‘Field Guide to North American Mushrooms’ before choosing which to eat and which to leave alone.

By Matthew Kearns, DVM

After a hot, dry August, we’re starting to get some late summer/early fall rain, and the rain brings the mushrooms. Some wild mushrooms are edible (and quite tasty); however, some can be downright toxic. Both classes of wild mushrooms grow right in our backyards and flourish at this time of year.

Names like toadstool, death cap and destroying angel make me want to make sure I don’t eat the wrong type. Unfortunately, dogs don’t consult the “Field Guide to North American Mushrooms” before choosing which to eat and which to leave alone.

The most common toxic genera of mushrooms are Amanita, Galerina and Lepiota. These genera carry a specific toxin called cyclopeptides. Cyclopeptides interfere with the nucleic acids RNA and DNA transcriptase, and these compounds are integral for cell replication. Therefore, cyclopeptides affect organ systems that have a large cell turnover (the GI system, liver and a portion of the kidneys). Other toxic mushrooms can affect the central nervous system, but they are not as common in this part of the country.

Above, the destroying angel mushroom is toxic to dogs.
Above, the destroying angel mushroom is toxic to dogs.

The initial symptoms usually start within 6 to 12 hours of exposure and affect the gastrointestinal tract, causing serious vomiting and diarrhea. The diarrhea many times becomes bloody, but dehydration secondary to vomiting and diarrhea is a bigger concern than blood in the stool. If untreated, the dehydration alone can lead to shock and organ dysfunction.

If the patient recovers from the initial GI signs, they can still develop liver and kidney dysfunction. If the exposure is small (this depends not only on the amount of mushrooms eaten but also the size/weight of the dog), the patient can make a complete recovery over a period of weeks to months. However, if the exposure is large, this can lead to complete liver or kidney failure.

Initial treatment involves hospitalization for decontamination and supportive care. In severe cases it is recommended to lavage (or pump) the stomach in conjunction with activated charcoal (to prevent further absorption) and IV fluids.

When I still worked emergency full time and we had a known or suspect mushroom toxicity, as long as we were able to control the vomiting, administer activated charcoal and support with IV fluids, the patients were discharged without any long-term damage.

How do we prevent mushroom exposure? Mushrooms are fungi and grow better under certain conditions. Some mushrooms require low amounts of light, but many do not. All mushrooms need a lot of moisture and decaying plant material. Therefore, making sure there is adequate drainage and removing any leaves, branches and other debris on a regular basis can reduce the amount of mushrooms grown.

Also, reduce watering (if you water regularly) to portions of your lawn prone to mushrooms. If you see mushrooms, remove them immediately at the base to prevent the aeration of spores. Then use a sharp shovel in an “up and away” fashion to remove the soil. If you can’t do that, use a garden rake or hoe to aerate that area and provide better drainage.

If you know that your dog has eaten mushrooms, bring him or her to your veterinarian immediately and follow their instructions. If your vet recommends hospitalization, IV fluids, inducing emesis (vomiting) and activated charcoal, then follow their instructions. Although it may be a little more expensive, it is better to be more aggressive early than to play catchup later. Also, treat your yard. Remember, “An ounce of prevention …”

Dr. Kearns practices veterinary medicine from his Port Jefferson office.