Remote sensing of coral reefs and their physical environment

Mumby, Peter J.; Skirving, William; Strong, A. E.; Hardy, John S.; LeDrew, E.; Hochberg, Eric J.; Stumpf, Rick P.; David, Laura T.

doi:10.1016/j.marpolbul.2003.10.031

Cited by 267 publications

(181 citation statements)

References 47 publications

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“…This high beta diversity has important implications for conservation planning. Remote sensing of tropical coastal ecosystems through the use of high-resolution sensors such as IKONOS and Quickbird can generate relatively accurate maps of the nature, size, and distribution of habitat patches (Mumby et al 2004b). It is clear from published data that different habitats contain different assemblages of species, and conservation planners aiming to conserve biodiversity are routinely advised to maximize habitat heterogeneity within reserves (Roberts et al 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Landscape patches are a particularly attractive surrogate for species diversity because they embody variation in biophysical properties that affect the distribution and abundance of species, and are detectable through the use of remote sensing (Turner et al 2003). Furthermore, the decreasing costs of remotely sensed imagery and increasing ease of data analysis mean that habitat types within many land and seascapes can be mapped relatively quickly and accurately (Mumby et al 2004b, McDermid et al 2005). Because there is frequently an either explicit or implicit link between habitats and distinct groups of species (''coherence within classes''; Mac Nally et al 2002), habitat maps represent a key surrogate of biodiversity for conservation planning (Margules and Pressey 2000).…”

Section: Introductionmentioning

confidence: 99%

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Tropical Coastal Habitats as Surrogates of Fish Community Structure, Grazing, and Fisheries Value

Harborne

Mumby

Kappel

et al. 2008

Ecological Applications

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Abstract. Habitat maps are frequently invoked as surrogates of biodiversity to aid the design of networks of marine reserves. Maps are used to maximize habitat heterogeneity in reserves because this is likely to maximize the number of species protected. However, the technique's efficacy is limited by intra-habitat variability in the species present and their abundances. Although communities are expected to vary among patches of the same habitat, this variability is poorly documented and rarely incorporated into reserve planning. To examine intra-habitat variability in coral-reef fishes, we generated a data set from eight tropical coastal habitats and six islands in the Bahamian archipelago using underwater visual censuses. Firstly, we provide further support for habitat heterogeneity as a surrogate of biodiversity as each predefined habitat type supported a distinct assemblage of fishes. Intrahabitat variability in fish community structure at scales of hundreds of kilometers (among islands) was significant in at least 75% of the habitats studied, depending on whether presence/absence, density, or biomass data were used. Intra-habitat variability was positively correlated with the mean number of species in that habitat when density and biomass data were used. Such relationships provide a proxy for the assessment of intra-habitat variability when detailed quantitative data are scarce. Intra-habitat variability was examined in more detail for one habitat (forereefs visually dominated by Montastraea corals). Variability in community structure among islands was driven by small, demersal families (e.g., territorial pomacentrid and labrid fishes). Finally, we examined the ecological and economic significance of intra-habitat variability in fish assemblages on Montastraea reefs by identifying how this variability affects the composition and abundances of fishes in different functional groups, the key ecosystem process of parrotfish grazing, and the ecosystem service of value of commercially important finfish. There were significant differences in a range of functional groups and grazing, but not fisheries value. Variability at the scale of tens of kilometers (among reefs around an island) was less than that among islands. Caribbean marine reserves should be replicated at scales of hundreds of kilometers, particularly for species-rich habitats, to capture important intra-habitat variability in community structure, function, and an ecosystem process.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tropical Coastal Habitats as Surrogates of Fish Community Structure, Grazing, and Fisheries Value

Harborne

Mumby

Kappel

et al. 2008

Ecological Applications

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“…Indeed, a variety of models and applications have been used to assess coral reefs from satellite and airborne multispectral imagery [1][2][3][4]. However, the concept of a "species" of coral is not quite accurate when considering spectral reflectance characteristics.…”

Section: Introductionmentioning

confidence: 99%

Spectral Reflectance of Palauan Reef-Building Coral with Different Symbionts in Response to Elevated Temperature

et al. 2016

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Spectral reflectance patterns of corals are driven largely by the pigments of photosynthetic symbionts within the host cnidarian. The warm inshore bays and cooler offshore reefs of Palau share a variety of coral species with differing endosymbiotic dinoflagellates (genus: Symbiodinium), with the thermally tolerant Symbiodinium trenchii (S. trenchii) (= type D1a or D1-4) predominating under the elevated temperature regimes inshore, and primarily Clade C types in the cooler reefs offshore. Spectral reflectance of two species of stony coral, Cyphastrea serailia (C. serailia) and Pachyseris rugosa (P. rugosa), from both inshore and offshore locations shared multiple features both between sites and to similar global data from other studies. No clear reflectance features were evident which might serve as markers of thermally tolerant S. trenchii symbionts compared to the same species of coral with different symbionts. Reflectance from C. serailia colonies from inshore had a fluorescence peak at approximately 500 nm which was absent from offshore animals. Integrated reflectance across visible wavelengths had an inverse correlation to symbiont cell density and could be used as a relative indicator of the symbiont abundance for each type of coral. As hypothesized, coral colonies from offshore with Clade C symbionts showed a greater response to experimental heating, manifested as decreased symbiont density and increased reflectance or "bleaching" than their inshore counterparts with S. trenchii. Although no unique spectral features were found to distinguish species of symbiont, spectral differences related to the abundance of symbionts could prove useful in field and remote sensing studies.

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“…For example, sphagnum bogs, wetlands, savannas, salt marshes and coral reefs create habitats that provide food sources, micro-environments and protection for a whole community of species that have specificity to these habitat types (see, for example, Jones et al, 1994). The identification and classification of these macro structures by remote sensing is possible (e.g., Yang and Prince 2000;Ozesmi and Bauer 2002;Silvestri et al 2003;Mumby et al 2004;Harris and Bryant 2009) and quantitative assessments of biodiversity populations have also been made using the species-area relationship and extent of habitat derived from remote sensing (Turner et al 2003;Jha et al 2005). Other examples of the link between specific species and landscape indicators have been reported by Dormann et al (2007) and Hendrickx et al (2007).…”

Section: Developing Indicators For Ecosystem Service Monitoringmentioning

confidence: 99%

The role of remote sensing in the development of SMART indicators for ecosystem services assessment

2016

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Remote sensing of coral reefs and their physical environment

Cited by 267 publications

References 47 publications

Tropical Coastal Habitats as Surrogates of Fish Community Structure, Grazing, and Fisheries Value

Tropical Coastal Habitats as Surrogates of Fish Community Structure, Grazing, and Fisheries Value

Spectral Reflectance of Palauan Reef-Building Coral with Different Symbionts in Response to Elevated Temperature

The role of remote sensing in the development of SMART indicators for ecosystem services assessment

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