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We investigated the validity of Autonomous Reef Monitoring Structures (ARMS) as monitoring tools for hard bottoms across a wide geographic and environmental range. We deployed 36 ARMS in the northeast Atlantic, northwest Mediterranean, Adriatic and Red Sea at 7-17 m depth. After 12-16 months, community composition was inferred from photographs, in six plate-faces for each ARMS. Overall, we found a highly significant effect of sea region, site (within seas), and plate-face on community composition. Plate-faces thus represent distinct micro-habitats and provide pseudo-replicates, increasing statistical power. Within each sea region taken individually, there was also a highly significant effect of site and plate-face. Because strong effects were obtained despite the fusion of taxonomic categories at high taxonomic ranks (to ensure comparability among biogeographic provinces), ARMS photo-analysis appears a promising monitoring tool for each sea region. We recommend keeping three ARMS per site and analyzing more numerous sites within a sea region to investigate environmental effects.
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http://dx.doi.org/10.1016/j.marpolbul.2019.02.066 | DOI Listing |
Nat Ecol Evol
September 2025
Princeton School of Public and International Affairs, Princeton University, Princeton, NJ, USA.
The decline of migratory shorebirds in the East Asian-Australasian Flyway has attracted global attention. Conservation efforts thus far have targeted habitat loss and degradation in the Yellow Sea region, with little attention having been given to direct mortality by humans. Here we studied the impacts of direct mortality of shorebirds along China's coast during migration from hunting, fishery bycatch and, at aquaculture sites, bird deterrence measures.
View Article and Find Full Text PDFBiol Lett
September 2025
Sea Power Reinforcement·Security Research Department, Korea Institute of Ocean Science & Technology, Busan, Republic of Korea.
Passive acoustic monitoring is an observation method for detecting and characterizing ocean soundscapes, and it has recently been used to observe underwater marine life. The brown croaker () is an important fish species in the Northwest Pacific Ocean that produces biological sounds. In this study, the sounds of 150 adult brown croakers were recorded continuously for three weeks using a self-recording hydrophone.
View Article and Find Full Text PDFMar Environ Res
September 2025
Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China; Key Laborator
Sri Lanka is uniquely situated at the junction of the Bay of Bengal (BOB) and the Arabian Sea (AS), where phytoplankton community may be strongly influenced by ocean dynamical processes, particularly mesoscale eddies and the East Indian Coastal Current (EICC). Here, to explore these regulatory mechanisms, phytoplankton and physicochemical parameters were collected from the top 200 m water column in the eastern and southern seas of Sri Lanka during the winter monsoon. Results showed higher concentrations of nutrients and phytoplankton abundance within the regions affected by EICC and cyclonic eddy (CE) compared to anticyclonic eddy (ACE).
View Article and Find Full Text PDFMar Environ Res
September 2025
Division of Earth and Environmental System Sciences, Pukyong National University, Busan, 48513, Republic of Korea. Electronic address:
A total of 27 Alexandrium catenella strains isolated from Jinhae-Masan Bay were examined to assess differences in the toxicity and composition of paralytic shellfish toxins (PST). The strains exhibited widely variable toxicity, ranging from 0.02 to 360.
View Article and Find Full Text PDFMar Pollut Bull
September 2025
CSIR-National Institute of Oceanography, Dona Paula, Goa, 403004, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
The Indian Sundarban Delta (ISD), located at the confluence of the Ganga-Brahmaputra-Meghna river system along India's eastern coast, is among the world's most geomorphologically dynamic and environmentally vulnerable deltaic systems. Over the past five decades, the region has undergone substantial morphodynamic changes driven by natural forces such as relative sea-level rise, wave action, and sediment flux, as well as anthropogenic factors like upstream water regulation via dams and barrages. This study examines the long-term evolution of shoreline and island morphology across the ISD from 1972 to 2025 using multi-temporal Landsat datasets under consistent tidal conditions.
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