By James A. Goodman, Samuel J. Purkis, Stuart R. Phinn
Remote sensing stands because the defining expertise in our skill to watch coral reefs, in addition to their biophysical homes and linked techniques, at neighborhood to international scales. With overwhelming facts that a lot of Earth’s reefs are in decline, our desire for large-scale, repeatable tests of reefs hasn't ever been so nice. thankfully, the final 20 years have obvious a fast enlargement within the skill for distant sensing to map and computer screen the coral reef atmosphere, its overlying water column, and surrounding environment.
Remote sensing is now a basic software for the mapping, tracking and administration of coral reef ecosystems. distant sensing bargains repeatable, quantitative exams of habitat and environmental features over spatially large parts. because the multi-disciplinary box of coral reef distant sensing keeps to mature, effects show that the options and features proceed to enhance. New advancements enable reef tests and mapping to be played with larger accuracy, throughout larger spatial components, and with better temporal frequency. The elevated point of knowledge that distant sensing now makes on hand additionally permits extra complicated clinical inquiries to be addressed.
As outlined for this booklet, distant sensing comprises the titanic array of geospatial facts gathered from land, water, send, airborne and satellite tv for pc systems. The booklet is prepared through expertise, together with: noticeable and infrared sensing utilizing photographic, multispectral and hyperspectral tools; lively sensing utilizing gentle detection and varying (LiDAR); acoustic sensing utilizing send, self reliant underwater motor vehicle (AUV) and in-water structures; and thermal and radar instruments.
Emphasis and Audience
This ebook serves a number of roles. It bargains an outline of the present cutting-edge applied sciences for reef mapping, offers specific technical info for coral reef distant sensing experts, imparts perception at the clinical questions that may be tackled utilizing this know-how, and in addition contains a starting place for these new to reef distant sensing. the person sections of the booklet comprise introductory overviews of 4 major different types of remotely sensed info used to review coral reefs, through particular examples demonstrating sensible purposes of different applied sciences being mentioned. instructions for choosing the main applicable sensor for specific functions are supplied, together with an outline of ways to make use of distant sensing information as a good device in technology and administration. The textual content is richly illustrated with examples of every sensing know-how utilized to quite a number medical, tracking and administration questions in reefs world wide. As such, the publication is greatly obtainable to a basic viewers, in addition to scholars, managers, distant sensing experts and an individual else operating with coral reef ecosystems.
Read or Download Coral Reef Remote Sensing: A Guide for Mapping, Monitoring and Management PDF
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Additional resources for Coral Reef Remote Sensing: A Guide for Mapping, Monitoring and Management
Stereopairs and photogrammetry methods have also been used to calculate depths to 32 S. A. Cochran underwater objects (Tewinkel 1963) and estimate underwater topography (Murase et al. 2008), which could be potentially helpful in mapping the geomorphology of reef systems. Andréfouët et al. (2002) show that using high-resolution spatial information from aerial photographs, rather than optical data from other airborne or satellite sensors, results in more accurate detection and mapping of the spatial patterns found during coral bleaching events.
J Coastal Res: Special issue 53—Coast Appl Airborne Lidar 53:1–5 Brock J, Yates K, Halley R, Kuffner I, Wright C, Hatcher B (2006) Northern Florida reef tract benthic metabolism scaled by remote sensing. Mar Ecol Prog Ser 312:123–139 Cuevas-Jimenez A, Ardisson PL (2002) Mapping shallow coral reefs by colour aerial photography. Int J Remote Sens 23:3697–3712 Dekker A, Phinn SR, Anstee J, Bissett P, Brando VE, Casey B, Fearns P, Hedley J, Klonowski W, Lee ZP, Lynch M, Lyons M, Mobley C (2011) Inter-comparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments.
Phinn et al. image pixel to transform the pixel value from a measurement of reflectance to a measurement of a biophysical property of the coral reef or surrounding water column, atmosphere or land (Phinn et al. 2010). These approaches are based on the assumption that the measured spectral reflectance in certain bands has a direct relationship to the biophysical property being estimated. For example, absorption of light at specific wavelengths have known relationships to: water column depth; concentrations of absorbing and scattering organic and inorganic materials; concentrations of photosynthetic and non-photosynthetic pigments in coral, seagrass and algae; and processes such as photosynthesis (Mobley 1994; Hedley and Mumby 2002).