1) A mass mortality event occurred at Chek Jawa intertidal flat in January 2007, killing many soft-bodied invertebrates like sea anemones, sponges, sea stars, and sea cucumbers.
2) The student conducted an independent research project through the UROPs program to investigate the causes of this mass death, examining factors like changes in salinity from rainfall and river outputs.
3) Through field surveys over multiple months, the student monitored recovery of affected species and populations at Chek Jawa, finding signs that it was rebounding with recruitment of larvae from nearby areas.
6. Chek Jawa (103°59'E, 1°24'N), is an intertidal flat located at the eastern tip of Pulau Ubin, a small island to the northeast of Singapore’s main island Chek Jawa Johor Mainland Singapore
7. Chek Jawa is lauded for its high biodiversity Figure from Ria Tan Six distinct ecosystems exist at Chek Jawa and it is abundant with locally rare fauna and flora
57. The sandbar before mass mortality is covered with several Stichodactyla haddoni . After the mass mortality, the sand bar is almost barren of Stichodactyla haddoni . These post mortality photographs were taken as part of using photographs for comparison and also to monitor recruitment over time. 12 January 2002 25 December 2007 16 August 2007 22 January 2008
58. Panoramic photo taken from tower 15 July 2007 16 August 2007 28 October 2007 25 December 2007 22 January 2008
59. Figure: Aerial photograph of Chek Jawa (squared in white) and its surrounding. Photo by Google Earth. Kuala Johore Salinity decreases