Beach leaf disease/Maladie de la feuille du hêtre

• Description )
• Envahissante – cette variété génétique de nématode origine de la ceinture du Pacifique (Corée, Japon, Nouvelle-Zélande).
• La maladie cause des difformités de la feuille des hêtres de tous les âges. 
• Les jeunes arbres meurent directement en raison de cette maladie. 
• Détectée pour la première fois en Ontario en 2017, la maladie est présente sur les rives du lac Érié et à Toronto.
• Nom: Litylenchus crenatae ssp. mccannii - Les nématodes qui se nourrissent du tissu entre les veines, endommageant les feuilles.

Umbrella effect of monitoring protocols for mammals in the Northeast US

Martens are showing researchers how healthy Maine's forests are: By preserving the marten habitat, up to 11 other crucial species will be protected, UMaine researchers say

David Guildford - News Center Maine  - May 9, 2022

For University of Maine wildlife habitat professor Alessio Mortelliti, seeing a marten in a stretch of Maine woods means those woods are healthy ... "In terms of when you have those predators, it means you have the whole food chain below them." ...  Studying the marten habitat automatically means studying other vital Maine species like bears, deer, moose, and squirrels with less time and money ... "I think what we’re seeing now is much more holistic foresters that come prepared to handle the demands that society has placed on our forest," Weiskittel said. "As we train the foresters today, they’re thinking about much broader things than just the typical tree diameter [and] tree height. It’s about wildlife habitat," he continued. "It’s about conservation value."

Understanding the American marten could aid conservation, but habitat loss threatens its existence

Sam Schipani - April 8, 2022 - UMaine News 

A group of University of Maine researchers led by Alessio Mortelliti, an associate professor in the Department of Wildlife, Fisheries and Conservation Biology, found that the American marten could serve as an effective “umbrella monitoring species” for 11 other mammal species in Maine. Umbrella monitoring species are those whose monitoring efforts are also found to overlap with a number of other species. As such, they are useful in reducing the effort required for important monitoring programs, which collect repeated observations or measurements of wildlife to ensure environmental management goals are being met.

Umbrella effect of monitoring protocols for mammals in the Northeast US

Alessio Mortelliti et al. - Nature - 03 February 2022

Our analyses show that up to 11 species benefit from an umbrella effect under a monitoring protocol designed for American marten (Figs. 3, 4, 5) at three different management objectives: the detection of 10%, 25%, and 50% declines in occupancy. The effect is consistent across management objectives in the case of several species (black bear, red squirrel, deer, fisher, and snowshoe hare), and encompasses up to 100% of the townships surveyed (Figs. 3, 4, 5). Some species (coyote, raccoon, and short-tailed weasel) show an umbrella effect when marten are monitored for high effort objectives (10% marten decline, Fig. 3) or when only a large detectable change in the non-target species is needed (i.e., 50% decline in red fox, lynx, and moose, Fig. 3). The least covered species were bobcat and porcupine ... 

Proctor Maple Research Center

Little Gems Everywhere: Biodiversity in the Maple Sugarbush

Colleen Goodhue - University of Vermont - October 30, 2025

What impact does maple sugaring have on the broader forest ecosystem? It’s a question that often goes unasked, yet biodiversity in maple forests is essential for the long-term health and productivity of Vermont’s forested landscape. This summer, a team of undergraduate and graduate students led by Tim Rademacher, Director of Scientific Research at the Proctor Maple Research Center (PMRC), set out to explore that very question. 

Tim Rademacher is the New Scientific Director of UVM's Proctor Maple Research Center

Ren Dillon - University of Vermont - July 19, 2024

Proctor Maple Research Center is a Field Research Station of the Department of Plant Biology at the University of Vermont, with over 300 acres of sugarbush located in Underhill, VT. UVM has led the world in maple research for over 100 years.