. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. ^•Y^ ^ Beach line December ^ •••••.. 1970 V I . \Beach line May 1960 » \ ^ HIRONDELLE. ) J ) ;passe coco ) ) ; Fig. 1. Bird Island, Seychelles, drawn from aerial photographs. The May 1960 beach line shows the position at the end of the north- west monsoon, while the December 1970 beach line, at the end of the south-east trades, shows the northerly movement of sand forming an extensive spit at the north of the island. The area of the sooty tern colony in I960 (vertical hatching) was taken from the aerial photog
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. ^•Y^ ^ Beach line December ^ •••••.. 1970 V I . \Beach line May 1960 » \ ^ HIRONDELLE. ) J ) ;passe coco ) ) ; Fig. 1. Bird Island, Seychelles, drawn from aerial photographs. The May 1960 beach line shows the position at the end of the north- west monsoon, while the December 1970 beach line, at the end of the south-east trades, shows the northerly movement of sand forming an extensive spit at the north of the island. The area of the sooty tern colony in I960 (vertical hatching) was taken from the aerial photograph, while the colony area in 1973 (horizontal hatching) was obtained by measurement with reference to land Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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