(S (S (BASENP (JJ Asian) (NNS coasts)) (VP (VBP are) (VP (ADVP (RB also)) (VP (VP (VBG becoming) (ADJP (RB increasingly) (JJ vulnerable))) (PP (IN because) (PP (IN of) (NP (BASENP (DT the) (NN loss)) (PP (IN of) (NP (BASENP (JJ protective) (NN mangrove) (NNS forests)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBP serve) (PP (IN as) (BASENP (NNS windbreaks)))) (CC and) (VP (VBP limit) (NP (BASENP (NN damage)) (PP (IN by) (NP (BASENP (NN storm)) (CC and) (BASENP (JJ tidal) (NNS surges)))))))))))))))))) (PERIOD .))