Results 121 to 130 of about 13,931 (160)

Mesophotic depths hide high coral cover communities in French Polynesia

Science of The Total Environment, 2022
The rapid decline of shallow coral reefs has increased the interest in the long-understudied mesophotic coral ecosystems (MCEs). However, MCEs are usually characterised by rather low to moderate scleractinian coral cover, with only a few descriptions of high coral cover at depth. Here, we explored eight islands across French Polynesia over a wide depth
Perez-Rosales, Gonzalo, Hernandez-Agreda, Alejandra, Bongaerts, Pim, Rouze, Heloise, Pichon, Michel, Carlot, Jeremy, Torda, Gergely, Under The Pole Consortium, Parravicini, Valeriano, Hedouin, Laetitia   +9 more
openaire   +3 more sources

Thresholds of Coral Cover That Support Coral Reef Biodiversity

2020
Global environmental change, such as ocean warming and increased cyclone activity, is driving widespread and rapid declines in the abundance of key ecosystem engineers, reef-building corals, on the Great Barrier Reef. Our ability to understand how coral associated species, such as reef fishes, respond to coral loss can be impeded by uncertainty ...
Vercelloni, Julie, Caley, M. Julian, Mengersen, Kerrie L.   +2 more
openaire   +2 more sources

Recovery disparity between coral cover and the physical functionality of reefs with impaired coral assemblages

Global Change Biology, 2020
AbstractThe ecology and structure of many tropical coral reefs have been markedly altered over the past few decades. Although long‐term recovery has been observed in terms of coral cover, it is not clear how novel species configurations shape reef functionality in impaired reefs.
F. Javier González‐Barrios, Rafael A. Cabral‐Tena, Lorenzo Alvarez‐Filip   +2 more
openaire   +2 more sources

Grazing pressure of herbivorous coral reef fishes on low coral-cover reefs

Coral Reefs, 2006
The impact of grazing by herbivorous fishes (Acanthuridae, Scaridae, and Pomacentridae) on low coral-cover reefs was assessed by measuring rates of benthic algal production and consumption on inshore and offshore reefs in the upper Florida Keys. Algal production rates, determined in situ with caged and uncaged experimental plates, were low (mean 1.05 g
Michelle J. Paddack, Robert K. Cowen, Su Sponaugle   +2 more
openaire   +1 more source

Coral cover and partial mortality on anthropogenically impacted coral reefs at Eilat, northern Red Sea

Marine Pollution Bulletin, 2004
A photographic analysis was conducted at five shallow reef sites (5-6 m) at Eilat (northern Red Sea) to study changes in live coral cover during a 2-year period. Logit regression analysis showed that levels of total oxidized nitrogen (TON; NO(2)+NO(3)) and the presence of SCUBA divers were significant explicative variables of coral partial mortality ...
Jeffrey, Wielgus, Nanette E, Chadwick-Furman, Zvy, Dubinsky   +2 more
openaire   +2 more sources

Spectral classifying base on color of live corals and dead corals covered with algae

SPIE Proceedings, 2016
Pigments in the host tissues of corals can make a significant contribution to their spectral signature and can affect their apparent color as perceived by a human observer. The aim of this study is classifying the spectral reflectance of corals base on different color.
Nurjannah Nurdin, Teruhisa Komatsu, Laurent Barille, M. Akbar A. S., Shuhei Sawayama, Muh. Nur Fitrah, Hermansyah Prasyad   +6 more
openaire   +1 more source

Coral cover remains suppressed three years after derelict net removal in a remote shallow water coral reef ecosystem

Marine Pollution Bulletin, 2023
The uninhabited Northwestern Hawaiian Islands (NWHI) contain 70 % of the shallow water coral reefs in the United States. An estimated 52 metric tons of derelict fishing nets accumulate here annually, becoming entangled in the reef structure and reducing coral cover.
Ariel A, Halperin, Frances, Lichowski, James, Morioka, Kevin, O'Brien, Rhonda, Suka, Brittany, Huntington   +5 more
openaire   +2 more sources

The hidden dynamics of low coral cover communities

Hydrobiologia, 2018
The coral reef crisis has resulted in many reefs stabilizing in a low coral cover state, and this condition is exemplified by the fringing reefs of St. John, US Virgin Islands, where coral cover has remained low for decades. To evaluate the demographic features maintaining this condition, a decade of coral abundance was examined in three domains ...
openaire   +1 more source

Mapping coral reef benthic cover with fused IKONOS imagery

SPIE Proceedings, 2007
In this article, we present some experiments on coral reef benthic cover mapping with fused IKONOS image. The objective of our study is to establish an efficient approach for the classification task on hand. Four scenarios are designed and in each scenario two classification methods (Maximum Likelihood and Decision Tree) are implemented.
Yuanyuan Wang, Yunhao Chen, Jing Li
openaire   +1 more source

Indirect benefits of high coral cover for non-corallivorous butterflyfishes

Coral Reefs, 2014
Extensive coral loss often leads to pronounced declines in the abundance of fishes, which are not necessarily limited to those fishes that are directly reliant on live coral for food or shelter. This study explored changes in the abundance of two non-corallivorous butterflyfish, Chaetadon auriga and Chaetodon vagabundus, during declines in coral cover ...
Pratchett, Morgan S., Blowes, Shane A., Coker, Darren James, Kubacki, E., Nowicki, Jessica P., Hoey, Andrew   +5 more
openaire   +2 more sources