Seagrasses are clonal plants and therefore may persist for a long time. They are among some of the oldest plants on earth, with some clones thought to be thousands of years old. However, renewal, or the recruitment of new genetic individuals, also occurs in clonal species. This tends to be sporadic and patchy, but can be very difficult to quantify.
by Elizabeth Sinclair and Gary Kendrick
For People & Plants Winter 2017