The image depicts the bark of an oak tree covered with two types of fungi: Biscogniauxia atropunctata and a tan resupinate polypore fungus.
Biscogniauxia atropunctata is characterized by its dark brown or black fruiting bodies, which can grow up to 4 cm in diameter. The fungus has a distinctive pattern of small, rounded spots on the surface of the caps, giving it a mottled appearance. It typically grows on dead or dying trees, particularly oak and other hardwoods.
The tan resupinate polypore fungus is a type of bracket fungus that grows on the underside of tree bark. It has a fan-shaped or semicircular cap with a smooth, wavy, or lobed edge. The cap is usually 2-6 cm wide and ranges in color from light brown to dark reddish-brown. The fungus grows in clusters on the bark of dead or dying trees.
Both fungi are saprotrophic, meaning they obtain their nutrients by breaking down organic matter in the environment. They play an important role in decomposing dead plant material and recycling nutrients back into the ecosystem.
The image also shows a close-up view of the oak tree's bark, which is rough and textured with deep grooves and ridges. The bark is likely from a white oak (Quercus alba) or another species of oak that has similar characteristics. – AI vision