Article
Oceanography
W. Navarro, A. Orfila, A. Orejarena-Rondon, J. C. Velez, S. Lonin
Summary: A novel approach using X-Band radar technology was studied to estimate wave energy dissipation on a coral reef barrier, revealing prominent features of coral reefs including reef morphological structure and wave energy dissipation. The results showed that the reef attenuates incident waves by approximately 75% due to frictional processes and wave breaking, and the estimated parameters are comparable to those reported in other shallow coral reef lagoons.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Marine & Freshwater Biology
Alexis Chaigneau, Olaegbe Victor Okpeitcha, Yves Morel, Thomas Stieglitz, Arnaud Assogba, Morgane Benoist, Pierre Allamel, Jules Honfo, Thierry Derol Awoulmbang Sakpak, Fabien Retif, Thomas Duhaut, Christophe Peugeot, Zacharie Sohou
Summary: This study investigated the main water-level variability modes of Nokoue Lagoon in Benin. Seasonal and weak interannual variations are mainly influenced by rainfall regime and river inflow, while tidal conditions vary with river inflow and ocean tide amplitude. Diurnal modulation and asymmetry of the tide are stronger during high water period.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Review
Environmental Sciences
Christopher Burns, Barbara Bollard, Ajit Narayanan
Summary: Mapping and monitoring coral reef benthic composition using remotely sensed imagery is essential in marine science and management, and the choice of machine-learning algorithms and spatio-temporal generalisation are crucial for scalability.
Article
Marine & Freshwater Biology
Raquel Marques, Marta Rufino, Audrey M. Darnaude, Frederique Carcaillet, Marie Meffre, Delphine Bonnet
Summary: The study found that the rapid disappearance of jellyfish in Thau is mainly due to their fast degradation and consumption by local microorganisms, while most benthic scavengers had limited impact on the removal of dead jellyfish.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Environmental Sciences
Thomas Trombetta, Francois-Yves Bouget, Christine Felix, Behzad Mostajir, Francesca Vidussi
Summary: Temperature and light are the main drivers of seasonal dynamics in microbial planktonic diversity in coastal ecosystems, but separating their effects is challenging. This study conducted weekly sampling in a coastal lagoon in the south of France to investigate the effects of temperature on microbial community diversity and succession. Results showed that water temperature was the main driver of community diversity and succession from winter to spring.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Oceanography
Maryam R. Al-Shehhi, David Nelson, Rashed Farzanah, Rashid Alshihi, Kourosh Salehi-Ashtiani
Summary: The study compared the occurrences of algal blooms in the Arabian Gulf and the Sea of Oman, demonstrating a decreasing trend in shallow waters and an increasing trend in deep waters. Algal blooms showed the highest frequency and concentration during winter and spring seasons.
OCEAN & COASTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Juan V. Molner, Juan M. Soria, Rebeca Perez-Gonzalez, Xavier Soria-Perpinya
Summary: Water transparency, a crucial environmental indicator, was assessed using the Secchi disk depth (ZSD) and three optical models were explored to establish a robust algorithm for ZSD estimation. The R560/R705 index was found to be the most optimal for turbid lakes. Remote sensing imagery from the Sentinel-2 mission was employed to validate the algorithm. The study contributes to improved water quality assessment and resource management.
Article
Geosciences, Multidisciplinary
Tiziana Ciuffardi, Zoi Kokkini, Maristella Berta, Marina Locritani, Andrea Bordone, Ivana Delbono, Mireno Borghini, Maurizio Demarte, Roberta Ivaldi, Federica Pannacciulli, Anna Vetrano, Davide Marini, Giovanni Caprino
Summary: This article presents a 2-year dataset from a stand-alone mooring deployed in the Levante Canyon of the eastern Ligurian Sea in November 2020. The Levante Canyon Mooring (LCM) is a deep submarine observatory located at 608 m depth in a crucial ecosystem area. The dataset includes measurements of hydrodynamics and thermohaline properties conducted with current meters and CTD probes across the water column. The ongoing observatory and regularly updated dataset are publicly available and of significant scientific interest.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Ecology
I. C. Tiddy, D. Kaullysing, D. M. Bailey, S. S. Killen, A. Le Vin, R. Bhagooli
Summary: Predation is a significant stressor for many coral species, and understanding its interaction with factors such as climate change is crucial for coral conservation. This study found that predation on bleaching-resilient massive corals was lower within Stegastes spp. territories regardless of corallivore density. The presence of Stegastes spp. and their branching Acropora habitats may also affect corallivorous fish density in areas with low coral diversity.
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
(2023)
Article
Biodiversity Conservation
Joseph W. P. Nakoa, John H. R. Burns, Kanoelani Steward, Lauren M. Kapono, Clifford A. Kapono
Summary: Coral reefs are declining due to various factors, and diseases affecting corals have increased in recent decades. However, the etiology of most diseases is still poorly understood. In this study, a 3D molecular cartographic platform was used to investigate the molecular characteristics of healthy and diseased coral tissues. The results showed differences in microbial diversity and molecular composition between healthy and diseased tissues, providing new insights into how diseases affect the molecular landscape of corals.
Article
Multidisciplinary Sciences
Maximilian Berthold, Martin Paar
Summary: Aquatic ecosystems are facing continuous pressure from recent or historical events. Increased nutrient supply leads to the replacement of submerged macrophytes by phytoplankton, while reducing nutrients does not restore habitats for submerged macrophytes. Constant net-heterotrophy may prevent the re-establishment of macrophytes and favor phytoplankton growth.
Article
Engineering, Marine
Tong Wang, Lin Su, Qunyan Ren, He Li, Yuqing Jia, Li Ma
Summary: The relationship between modal elevation angle and the relative arrival time between modes, derived from exploiting modal dispersion, provides less environmentally influenced source information. However, the standard method based on modal dispersion has limitations. To overcome this, we propose a hybrid method that combines deep learning with short-time conventional beamforming to estimate source range of low-frequency underwater acoustic-pulse signals. Experimental results show that our method outperforms matched-field processing, with a mean relative-error reduction of 71%, mean root-squared error reduction of 2.25 km, and an accuracy of 85%.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Marine & Freshwater Biology
Anitha Gera, M. Kumaraswami, V. Ranga Rao, Akhilesh Vijay, R. S. Pandiyarajan, P. Ezhilarasan, M. V. Ramana Murthy
Summary: This study investigates the temperature and salinity trends in the Pulicat lagoon, highlighting the significant fluctuations in salinity and the influence of hydrology and solar heat fluxes. Extremely high salinities, exceeding values during severe drought conditions, were observed during the study period. Additionally, the occurrence of meromixis with high subsurface temperature and salinity during winter months in a specific region of the lagoon is reported.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Geography, Physical
Zhi Dong, Xuefa Shi, Jianjun Zou, Xinqing Zou, Ruxi Dou, Yonghua Wu, Yanguang Liu, Chendong Ge, Sergey Gorbarenko
Summary: This study investigates ventilation variations in the Japan Sea over the last 25 ka by analyzing radiolarian assemblages in sediment cores from different regions. It reveals a transition from weak ventilation during the Last Glacial Maximum to oxygen richer conditions during the early Holocene, with various regions re-ventilating at different times during the deglaciation. The weakening ventilation in the northwest during the Bølling-Allerød and Younger Dryas was likely due to sea ice blocking effects, while increased shallow water export during the Bølling-Allerød possibly caused poorly oxygenated deep-water conditions in the southwest.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Environmental Sciences
Jiwei Li, Gregory P. Asner
Summary: Three-dimensional shallow benthic complexity provides valuable information for coral reef conservation and management, as it reflects the physical conditions and biodiversity of shallow coral reef environments. This study mapped global shallow water benthic complexity using satellite images and found that high complexity regions are mainly concentrated in areas with high benthic biodiversity. However, a significant portion of coral reef regions with high benthic complexity remains unprotected. The global coral reef benthic complexity map generated in this study can contribute to improving marine protected areas, reef conservation, and management.
ENVIRONMENTAL RESEARCH LETTERS
(2023)