scholarly journals Evolution of Coral Rubble Deposits on a Reef Platform as Detected by Remote Sensing

2012 ◽  
Vol 5 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Amelia Shannon ◽  
Hannah Power ◽  
Jody Webster ◽  
Ana Vila-Concejo
Keyword(s):  
Remote Sensing ◽  
Coral Rubble ◽  
Reef Platform

scholarly journals Inter-Habitat Variability in Parrotfish Bioerosion Rates and Grazing Pressure on an Indian Ocean Reef Platform

Diversity ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 381
Author(s):  
Robert T. Yarlett ◽  
Chris T. Perry ◽  
Rod W. Wilson ◽  
Alastair R. Harborne
Keyword(s):  
Indian Ocean ◽  
Physical Structure ◽  
Grazing Pressure ◽  
Species Assemblages ◽  
Bleaching Event ◽  
Ecological Health ◽  
Ecological Functions ◽  
Coral Rubble ◽  
Habitat Variability ◽  
Reef Platform

Parrotfish perform a variety of vital ecological functions on coral reefs, but we have little understanding of how these vary spatially as a result of inter-habitat variability in species assemblages. Here, we examine how two key ecological functions that result from parrotfish feeding, bioerosion and substrate grazing, vary between habitats over a reef scale in the central Maldives. Eight distinct habitats were delineated in early 2015, prior to the 2016 bleaching event, each supporting a unique parrotfish assemblage. Bioerosion rates varied from 0 to 0.84 ± 0.12 kg m−2 yr−1 but were highest in the coral rubble- and Pocillopora spp.-dominated habitat. Grazing pressure also varied markedly between habitats but followed a different inter-habitat pattern from that of bioerosion, with different contributing species. Total parrotfish grazing pressure ranged from 0 to ~264 ± 16% available substrate grazed yr-1 in the branching Acropora spp.-dominated habitat. Despite the importance of these functions in influencing reef-scale physical structure and ecological health, the highest rates occurred over less than 30% of the platform area. The results presented here provide new insights into within-reef variability in parrotfish ecological functions and demonstrate the importance of considering how these interact to influence reef geo-ecology.

Phased Arrays for Radio Astronomy, Remote Sensing, and Satellite Communications

2018 ◽  
Author(s):  
Karl F. Warnick ◽  
Rob Maaskant ◽  
Marianna V. Ivashina ◽  
David B. Davidson ◽  
Brian D. Jeffs
Keyword(s):  
Remote Sensing ◽  
Radio Astronomy ◽  
Phased Arrays ◽  
Satellite Communications

Hyperspectral Imaging Remote Sensing

2016 ◽  
Author(s):  
Dimitris Manolakis ◽  
Ronald Lockwood ◽  
Thomas Cooley
Keyword(s):  
Remote Sensing ◽  
Hyperspectral Imaging
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