Tag Archive | Diversity

Earthworms and Sugar Maple Saplings

Earthworms and Sugar Maple Saplings

Who would have thought that something so small would have such an impact on ecosystems? Lumbricus terrestris – the common earthworm – may not be as friendly as one might think. This species plays a major role in most ecosystems; in gardens and agricultural lands they are typically beneficial, but are they harming the iconic […]

Shelf fungi’s growth preference between standing dead and fallen dead trees

Shelf fungi’s growth preference between standing dead and fallen dead trees

The shelf fungus, or Polyporaceae, is a species with a fruiting body, containing pores or tubes which, as its common name suggests, is shaped like a round tablet. That being said, they come in many forms, colours and shapes (see figures 1 to 3). In fact, about 1700 species of these wood-rotting organisms were recorded in […]

Invasive Earthworms Posing Possible Threat to Yellow Birch Tree Population

Invasive Earthworms Posing Possible Threat to Yellow Birch Tree Population

The decline in tree populations around the world has become an alarming issue, as they play an important role in ecosystems, as well as in the economy. In the Saint Lawrence Lowlands, Yellow birch (Betula alleghaniensis), a uniquely golden yellow barked tree with a wintergreen essence, is an especially interesting species. Commercially, the yellow birch […]

Invertebrate Diversity in Coniferous and Deciduous Forests of the Morgan Arboretum

Invertebrate Diversity in Coniferous and Deciduous Forests of the Morgan Arboretum

Background Information on Invertebrates Representing the most dominant species in the animal kingdom (Spelman, 2012), and the majority of species diversity in terrestrial, marine, and freshwater ecosystems (New and Yen, 1995), invertebrates play a major role in the sustenance and health of the communities they thrive in. Some prime examples of their importance include their role in pollination […]

The Effects of Beech Trees on Understory Diversity  

The Effects of Beech Trees on Understory Diversity  

Undergrowth, or the herbaceous layer, is made up of low-lying vegetation that grows below large trees. The competitive interactions between the dominant tree species and the herbaceous layer shape the characteristics of the forest and guide the developmental direction of the ecosystem over time (Gilliam, 2007). The herbaceous layer was assessed in the Morgan Arboretum […]

The Relationship Between Forest Type and Amphibian Abundance

Follow the twitter account @nofibs4amphibs to learn more and see fun updates on the research project! Introduction Amphibians are cold-blooded vertebrates who undergo fascinating metamorphoses. Once upon a time, they were the top land predators from the Carboniferous to early Permian (Carroll 2009). A diverse group, they occupy many niches and play an invaluable role […]

Hay Scented Fern and its Effect on Sugar Maple Trees in the Morgan Arboretum

Hay Scented Fern and its Effect on Sugar Maple Trees in the Morgan Arboretum

Overview: Hay-scented fern (Dennstaedtia punctilobula) is an invasive, rhizomatous, perennial fern native to North America (Hippensteel and Bowersox, 1995). This species grows in many different conditions and spreads itself by dispersing its spores with the help of wind. This perennial fern is about 1-3’ tall, with deciduous leaves that are erect to ascending. It is […]