Ningaloo reef: shallow marine habitats mapped using a hyperspectral sensor
Halina T Kobryn1, Kristin Wouters, Lynnath E Beckley
1School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia, Australia. H.Kobryn@murdoch.edu.au
Plos One
|August 8, 2013
Summary
Hyperspectral remote sensing efficiently mapped Ningaloo Marine Park's reef habitats. This cost-effective approach provides detailed benthic cover maps crucial for managing large marine protected areas.
Area of Science:
- Marine ecology
- Remote sensing
- Geospatial analysis
Background:
- Effective management of large marine protected areas necessitates accurate habitat maps.
- Ningaloo Marine Park, a significant reef system, requires detailed mapping for research and conservation.
Purpose of the Study:
- To map the benthic habitats of Ningaloo Marine Park using hyperspectral imagery.
- To assess the efficiency and cost-effectiveness of hyperspectral remote sensing for large-scale reef mapping.
Main Methods:
- Acquisition and processing of HyMap airborne hyperspectral imagery (3.5 m resolution).
- Atmospheric, air-water interface, and water column correction using the Modular Inversion and Processing System.
- Semi-automated, pixel-based classification with fuzzy logic and derivative techniques, validated by field data.
Main Results:
- Generated five thematic classification levels of benthic cover, with up to 46 classes in the most detailed maps.
- Achieved 70% overall mapping accuracy for the most detailed classification level.
- Macro-algal communities dominated benthic cover; corals comprised approximately 7% of the mapped area.
Conclusions:
- Hyperspectral remote sensing is an efficient and cost-effective method for mapping shallow, tropical fringing reef habitats.
- The generated habitat maps provide valuable data for the research, monitoring, and management of large, remote marine protected areas like Ningaloo.
Related Concept Videos
01:18Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
01:23Red Algae
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...