两种主要的沉积物基质 ☆ Solid rock礁石 Particulate sand or mud沙、泥 o In general, on rocky shores, the greatest amount of solid substratum is to be found between tide marks with a progressive change through sand to mud In deep water o The stability of substratum is obviously important for growth of seaweeds两种主要的沉积物基质 ❖ Solid rock 礁石 ❖ Particulate sand or mud 沙、泥 ❖ In general, on rocky shores, the greatest amount of solid substratum is to be found between tide marks, with a progressive change through sand to mud in deep water. ❖ The stability of substratum is obviously important for growth of seaweeds