[2끊어듣기] TOEFL Reading : Seagrasses 2  

The slowing of wave (action) (and) currents means 

that seagrass beds tend to accumulate sediment.

However, 

this is not universal 

and depends 

on (the) currents 

under which the bed exists.

Seagrass beds 

under the influence (of) strong currents 

tend to have many of (the) lighter particles, 

including seagrass (debris,) 

moved out, 

whereas beds 

in weak current (areas) 

accumulate (lighter detrital) material. 

It is interesting 

that temperate seagrass beds accumulate sediments 

from sources outside the beds, 

whereas tropical seagrass beds 

derive most (of) their sediments from within.