Detecting coral bleaching, using QuickBird multi-temporal data: A feasibility study at Kish Island, the Persian Gulf

摘要: Coral bleaching events have become more frequent and intense worldwide speculated to be a severe threat for coral survival in future. The Persian Gulf, as one of the warmest seas, has also experienced mortalities events. Historically, are known occur south such information is scarce northern side. Perhaps remoteness inaccessibility Iran main communities which developed on offshore islands can explain lack data. To address this issue, feasibility using multi-temporal satellite images detecting past were investigated. Two QuickBird (2005, 2008) selected detect 2007 event at Kish Island, Iran, accuracy results compared situ observations. Current study might represent “algae-challenged” scenario terms having 7 months' time lapse between post-bleaching image. As result this, we had algae-covered corals instead white bleached corals. In proposed procedure pre classified, changes reflectance values within classes interpreted areas. By method could eliminate effect miss-classification sand; well live Furthermore, it not necessary image acquired during events, although will increase accuracy. technique detected ∼28% support idea that distinguished by images. Understanding occurrence, severity, extent may help us understand population dynamics reveal connectivity patterns Gulf.