hrcathinu-tubcs" ( pncumatophm Q$ ) 

 ojcC , im r from sub-surface tool 



Ens "» pla,e 2) - which wi " havc 



XL©!! effects on sedimentation 

 L m the stilt-root structures of 

 Bhivphnni. which lacks pneumato- 

 pho'res. During the past tour years, 

 measurements have been made in and 

 [round (Jip mangrove fringe at Yar- 

 fed on the north-wcslcrn shores of 

 Vftstemport Bay, in an attempt to 

 ,| U r land-building effects of 



I hi Yarinoa SlIORtj 



The geological history of Westcru- 

 ,, 0 n Bay has been described by Jen- 

 fjn | |»<f>2); il is a large lidal embay- 



mcnt. wiih a spring tide range of 

 up to 1 1 feet on its northern shores. 

 The mangrove fringe is still exten- 

 sive I Fig. I), despite past fiuctua- 

 lions (F.nright 196')) and the recent 

 ellects of reclamation for port deve- 

 lopment in the Hastings district. The 

 Avfcennta fringe is up to 300 yards 

 wide on sheltered sectors, and il 

 stands in Ironl of a salt marsh zone 

 up to 900 yards wide. Swamp paper- 

 bark [Melaleuca erici folia) is often 

 present at the back of the salt marsh. 



At Yaiinga these features are well 

 developed. A boat channel cut in 

 1967 is bordered by levees of dredged 

 material dumped alongside, which 

 provide easy access io each of Ihe 



k. sail 



I'iiiure 1 The northern patt ul Uesn-rnpon Bav. \t..n»:rovc frinfie 



niatsh shown In crosses, dots indicale low water spring tide line. 

 H — Hastings. SP— Stony Point. V Vannga 



W— W,rniet. I — Tnnradin. G— Ciranlville. 



I tic extent or muntroves and «Ui mai>h ha* recently been i educed fet) 

 land rtvlarnal.uM jii the Hasting .irea. 



Idly, 1971 '91 



