For questions 2-4, imagine a chain of 6 islands near the equ…
For questions 2-4, imagine a chain of 6 islands near the equator, formed by volcanic eruption. The oldest island in this chronosequence is 10 million years old and the youngest is 1 million years old. Consider the source of important components of soil, such as organic matter, N content, and P content. How do you expect each to change over this 9 million year chronosequence? Hint – think about the mechanistic processes by which these these substances are made available in the environment. Which graph reflects the general relationship you expect between organic matter concentration in the soil and time?