By Dr Ananya Mandal, MD. Dopamine is a neurotransmitter released by the brain that plays a number of roles in humans and other animals. Some of its notable functions are in: 1  movement. 2  memory. 3  pleasurable reward.
Sycamores (Platanus spp.) are tall, spreading shade trees. These North American natives have few problems or pests, but their older bark flakes off in patches. If your sycamore is shedding bark, it may be a healthy, maturing tree.
Answer: Recent rains have led to a buildup of fungal spores in the air, causing anthracnose disease to occur on ash, sycamore and other trees, including dogwood, maple and oak. Anthracnose usually just attacks the leaves, but on sycamore and dogwood, it can also kill twigs and branches.