Integrating in situ reef-top reflectance spectra with Landsat TM imagery to aid shallow-tropical benthic habitat mapping

Coral Reefs ◽  
2004 ◽  
Vol 23 (1) ◽  
pp. 5-20 ◽  
Author(s):  
S. J. Purkis ◽  
R. Pasterkamp
Keyword(s):  
Landsat Tm ◽  
Habitat Mapping ◽  
Reflectance Spectra ◽  
Benthic Habitat ◽  
Landsat Tm Imagery

scholarly journals Representative benthic habitat mapping on Lovina coral reefs in Northern Bali, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Anggita Kartikasari ◽  
TODHI PRISTIANTO ◽  
RIZKI HANINTYO ◽  
EGHBERT ELVAN AMPOU ◽  
TEJA ARIEF WIBAWA ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Habitat Mapping ◽  
Benthic Habitat ◽  
Coral Rubble ◽  
Spatial Coverage ◽  
Coral Reef Ecosystems ◽  
Optical Imagery ◽  
Sentinel 2

Abstract. Kartikasari A, Pristianto T, Hanintyo R, Ampou EE, Wibawa TA, Borneo BB. 2021. Representative benthic habitat mapping on Lovina coral reefs in Northern Bali, Indonesia. Biodiversitas 22: 4766-4774. Satellite optical imagery datasets integrated with in situ measurements are widely used to derive the spatial distribution of various benthic habitats in coral reef ecosystems. In this study, an approach to estimate spatial coverage of those habitats based on observation derived from Sentinel-2 optical imagery and a field survey, is presented. This study focused on the Lovina coral reef ecosystem of Northern Bali, Indonesia to support deployment of artificial reefs within the Indonesian Coral Reef Garden (ICRG) programme. Three specific locations were explored: Temukus, Tukad Mungga, and Baktiseraga waters. Spatial benthic habitat coverages of these three waters was estimated based on supervised classification techniques using 10m bands of Sentinel-2 imagery and the medium scale approach (MSA) transect method of in situ measurement.The study indicates that total coverage of benthic habitat is 61.34 ha, 25.17 ha, and 27.88 ha for Temukus, Tukad Mungga, and Baktiseraga waters, respectively. The dominant benthic habitat of those three waters consists of sand, seagrass, coral, rubble, reef slope and intertidal zone. The coral reef coverage is 29.48 ha (48%) for Temukus covered by genus Acropora, Isopora, Porites, Montipora, Pocillopora. The coverage for Tukad Mungga is 8.69 ha (35%) covered by genus Acropora, Montipora, Favia, Psammocora, Porites, and the coverage for Baktiseraga is 11.37 ha (41%) covered by genus Montipora sp, Goniastrea, Pavona, Platygyra, Pocillopora, Porites, Acropora, Leptoseris, Acropora, Pocillopora, Fungia. The results are expected to be suitable as supporting data in restoring coral reef ecosystems in the northern part of Bali, especially in Buleleng District.

scholarly journals Experimental determination of reflectance spectra of Antarctic krill (Euphausia superba) in the Scotia Sea

2021 ◽  
pp. 1-13
Author(s):  
Anna Belcher ◽  
Sophie Fielding ◽  
Andrew Gray ◽  
Lauren Biermann ◽  
Gabriele Stowasser ◽  
...  
Keyword(s):  
Antarctic Krill ◽  
Euphausia Superba ◽  
Reflectance Spectra ◽  
Spectral Signature ◽  
Absorption Feature ◽  
Scotia Sea ◽  
Surface Ocean ◽  
Measuring Surface ◽  
Ground Truthing

Abstract Antarctic krill are the dominant metazoan in the Southern Ocean in terms of biomass; however, their wide and patchy distribution means that estimates of their biomass are still uncertain. Most currently employed methods do not sample the upper surface layers, yet historical records indicate that large surface swarms can change the water colour. Ocean colour satellites are able to measure the surface ocean synoptically and should theoretically provide a means for detecting and measuring surface krill swarms. Before we can assess the feasibility of remote detection, more must be known about the reflectance spectra of krill. Here, we measure the reflectance spectral signature of Antarctic krill collected in situ from the Scotia Sea and compare it to that of in situ water. Using a spectroradiometer, we measure a strong absorption feature between 500 and 550 nm, which corresponds to the pigment astaxanthin, and high reflectance in the 600–700 nm range due to the krill's red colouration. We find that the spectra of seawater containing krill is significantly different from seawater only. We conclude that it is tractable to detect high-density swarms of krill remotely using platforms such as optical satellites and unmanned aerial vehicles, and further steps to carry out ground-truthing campaigns are now warranted.

scholarly journals Assessing the use of harmonized multisource backscatter data for thematic benthic habitat mapping

2021 ◽  
Vol 3 ◽  
pp. 100015
Author(s):  
Benjamin Misiuk ◽  
Myriam Lacharité ◽  
Craig J. Brown
Keyword(s):  
Habitat Mapping ◽  
Benthic Habitat

scholarly journals Offshore benthic habitat mapping based on object-based image analysis and geomorphometric approach. A case study from the Slupsk Bank, Southern Baltic Sea

2021 ◽  
Vol 801 ◽  
pp. 149712 ◽  
Author(s):  
Lukasz Janowski ◽  
Radoslaw Wroblewski ◽  
Janusz Dworniczak ◽  
Mateusz Kolakowski ◽  
Karolina Rogowska ◽  
...  
Keyword(s):  
Image Analysis ◽  
Baltic Sea ◽  
Habitat Mapping ◽  
Benthic Habitat ◽  
Southern Baltic Sea ◽  
Object Based Image Analysis ◽  
Object Based ◽  
Southern Baltic

Detection of forest harvest type using multiple dates of Landsat TM imagery

2002 ◽  
Vol 80 (3) ◽  
pp. 385-396 ◽  
Author(s):  
Emily Hoffhine Wilson ◽  
Steven A Sader
Keyword(s):  
Landsat Tm ◽  
Forest Harvest ◽  
Landsat Tm Imagery

scholarly journals Recession of the southern part of Barnes Ice Cap, Baffin Island, Canada, between 1961 and 1993, determined from digital mapping of Landsat TM

1997 ◽  
Vol 43 (143) ◽  
pp. 98-102 ◽  
Author(s):  
John D. Jacobs ◽  
Élizabeth L. Simms ◽  
Alvin Simms
Keyword(s):  
Regional Climate ◽  
Landsat Tm ◽  
Early 20Th Century ◽  
Baffin Island ◽  
Digital Mapping ◽  
Ice Cap ◽  
Significant Difference ◽  
Southern Half ◽  
Landsat Tm Imagery ◽  
General Reduction

AbstractChanges along the margin of the southern half of the 5900 km2 Barnes Ice Cap have been assessed using 1993 Landsat TM imagery in comparison with digitized 1:50 000 NTS maps based on 1961 photogrammetry. The average recession over the 183 km long southern perimeter was found to be at least 4 m a−1, with no significant difference between the southeast and southwest sectors. Viewed in conjunction with the sustained retreat previously reported for the northwest margin, these results indicate that a general reduction in the size of Barnes Ice Cap is occurring. The present retreat phase began under a regional climate warming in the late 19th to early 20th century period and continues, while the record of the ablation-season temperature since the mid-century has not shown any significant trend.

scholarly journals Feasibility of Invasive Grass Detection in a Desertscrub Community Using Hyperspectral Field Measurements and Landsat TM Imagery

2011 ◽  
Vol 3 (10) ◽  
pp. 2283-2304 ◽  
Author(s):  
Aaryn D. Olsson ◽  
Willem J.D. van Leeuwen ◽  
Stuart E. Marsh
Keyword(s):  
Field Measurements ◽  
Landsat Tm ◽  
Invasive Grass ◽  
Landsat Tm Imagery
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