In ecological succession, since Iichens grow on bare rock, they are considered to be
Answer Details
Lichens are considered pioneer organisms in ecological succession. This is because they are among the first organisms to colonize an area that is devoid of life, such as bare rock. Lichens are unique in that they are composed of both a fungus and an alga, which allows them to grow in harsh environments with limited resources. Over time, lichens help to break down rock and create soil, which then allows other plants and organisms to colonize the area. As such, lichens play an important role in the early stages of ecological succession by paving the way for other species to establish themselves in a newly-formed ecosystem.