Article
Environmental Sciences
Viviana Pasquini, Pierantonio Addis, Ambra Angelica Giglioli, Davide Moccia, Antonio Pusceddu
Summary: This study investigated the effects of Holothuria tubulosa on sedimentary organic matter quantity, biochemical composition, and nutritional quality. The results showed that Holothuria tubulosa can increase protein and lipid content through their defecation, making them a more labile food source for other benthic organisms.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Environmental
YingXun Du, ShiLin An, Hu He, ShuaiLong Wen, Peng Xing, HongTao Duan
Summary: This study investigates the role of sediments in the biogeochemical transformation of organic matter during algal blooms in a shallow eutrophic lake in China. The results show that sediments have a significant positive effect on nutrients, metals, phytoplankton, particulate organic matter, and dissolved organic matter. The findings highlight the importance of sediments in the carbon cycle and organic carbon formation.
Article
Environmental Sciences
Chao Guo, Leicheng Guo, Sarah Bass, Andrew J. Manning, Zhongwu Jin, Yinjun Zhou
Summary: The effects of different types of organic matter on fine sediment flocculation were investigated through laboratory tank experiments. Results demonstrated that the introduction of organic polymers (such as xanthan gum and guar gum) significantly enhanced flocculation, while the addition of humic acid had minimal influence. The nonionic polymer guar gum showed greater efficacy in promoting larger and more fractal flocs compared to the anionic polymer, xanthan gum. Non-linear trends were observed in the evolution of floc size and structure with increasing ratios of organic polymer concentration to kaolinite concentration.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Shiquan Chen, Ke Pan, Wenqin Li, Dandan Duan
Summary: The rapid development of coastal aquaculture has led to excessive discharge of organic matter and nutrients, potentially causing eutrophication and metal accumulation. The study found that algae-derived organic matter and effluent nitrogen were significantly associated with the enriched zinc, cadmium, and tin.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Oceanography
Jong-Ku Gal, Sun-Yong Ha, Jisoo Park, Kyung-Hoon Shin, Dongseon Kim, Nan-Young Kim, Sung-Ho Kang, Eun Jin Yang
Summary: Satellite observations and modeling data show an increase in net primary production in the Arctic Ocean due to retreating sea ice and warming, with under-ice blooms becoming more important. The role of sea-ice algae in these blooms is still unknown due to limited observations.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Environmental Sciences
Claude Kiki, Ying Qiu, Qi Wang, Binessi Edouard Ifon, Dan Qin, Kassim Chabi, Chang-Ping Yu, Yong-Guan Zhu, Qian Sun
Summary: The biofouling and aging of microplastics by microalgae can significantly alter the properties of microplastics, enhance the adsorption capacity of certain plastics, and affect the adsorption of organic micropollutants.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Ecology
Ismail Akcay, Suleyman Tugrul, Koray Ozhan
Summary: This study investigated the coastal eutrophication and its relationship with terrestrial nutrient and particulate organic matter (POM) inputs in the Mersin Bay of the Northeastern Mediterranean Sea. The results revealed that nutrient concentrations were significantly increased due to regional river and wastewater discharges, resulting in eutrophication and elevated POM concentrations in the bay's surface waters. The higher C/N and C/P ratios in the sediment indicated selective decay of N and P-containing organic matter buried in muddy sediments, and sediment organic matter was positively correlated with mud content.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
Yan Chen, Chun Hu, Gui-Peng Yang, Xian-Chi Gao
Summary: Sedimentary organic matter (SOM) in the South Yellow Sea and East China Sea was analyzed for total organic carbon (TOC), total nitrogen (TN), stable carbon isotope (delta 13C), and total hydrolysable amino acids (THAA). The results showed a mixture of marine organic matter and soil-derived organic matter in the study area, with relatively fresh organic matter found near the Shandong Peninsula, but overall significant degradation of SOM.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Engineering, Environmental
Moshan Chen, Carter A. Rholl, Shane L. Persaud, Zixuan Wang, Zhen He, Kimberly M. Parker
Summary: During harmful algal blooms (HABS), permanganate can be used as a preoxidant to improve drinking water quality by removing algal cells and degrading algal toxins. However, permanganate oxidation also alters the precursors of disinfection byproducts (DBPs) from intracellular algal organic matter (AOM), affecting DBP formation during disinfection. This study evaluated the impacts of permanganate preoxidation on DBP generation during chlorination and chloramination of AOM. The results showed that permanganate preoxidation increased the formation of certain DBPs and decreased others, indicating a complex interaction between permanganate and AOM.
Article
Environmental Sciences
Katja Klun, Primoz Sket, Alfred Beran, Ingrid Falnoga, Jadran Faganeli
Summary: This study isolated colloidal organic matter (COM) from phytoplankton exudates and analyzed its composition using C elemental analysis and H-1 NMR spectroscopy. The results revealed that phytoplankton COM is mainly composed of polysaccharides, with minor contributions from proteins and lipids. Thus, phytoplankton COM predominantly contributes to the marine COM pool in the polysaccharide fraction.
Article
Environmental Sciences
Wenwen Wang, Junyi Chen, Shuhang Wang, Wei Li
Summary: This study compares the properties and sources of SOM and SPOM in Hulun Lake, a typical lake in the cold and arid region of China. The results show that the content of SOM and SPOM is higher in the northern and western regions of the lake, and that SOM and SPOM mainly originate from terrestrial sources, closely related to climate change.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Peiyun Wei, Heyun Fu, Zhaoyi Xu, Dongqiang Zhu, Xiaolei Qu
Summary: Algal organic matter (AOM) exhibits non-monotonic hydrophobicity changes in aquatic systems, influenced by algae activity, which affects the bioavailability of hydrophobic organic compounds in aquatic systems.
ENVIRONMENTAL POLLUTION
(2021)
Article
Oceanography
Gabrielle Nadai, Eva-Maria Noethig, Louis Fortier, Catherine Lalande
Summary: This study investigated the impact of snow and sea ice cover on microalgal fluxes in the Beaufort Sea, finding that delayed sea ice breakup and early snowmelt in 2016 contributed to higher diatom fluxes, while delayed sea ice algae release led to lower diatom and PPC fluxes when snowmelt occurred late. The ongoing sea ice reduction due to global warming may increase PPC fluxes to the seafloor and carbon sequestration at depth in the Arctic Ocean.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Fisheries
Chuandeng Tu, Chao Liu, Wei Gao, Hongwei Shan, Weiyang Bao
Summary: Natural biofilms are often used as settlement substrates for sea cucumber larvae in Chinese hatcheries, but they have low efficiency and form quickly. This study improved the surface characteristics of corrugated plates by coating them with oyster shell powders, resulting in dense biofilm formation and increased larval settlement efficiency. Additionally, the induction activity of bacteria for sea cucumber larvae settlement was found to be species-specific.
Article
Engineering, Marine
Mingyong Wang, Bowen Zhang, Xihua Cao, Fang Li, Xiuxian Song, Zhiming Yu
Summary: Modified clay (MC) technology has been widely used to control harmful algal blooms (HABs) with effective results. This study investigated the effect of dissolved algal organic matter (dAOM) on MC flocculation and found that a small amount of dAOM can enhance the flocculation efficiency of MC, while large amounts of dAOM inhibit the flocculation. The study also revealed that the dosage of MC needs to be increased to achieve the best algal removal efficiency.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Oceanography
Jean Beth S. Jontila, Harold M. Monteclaro, Gerald F. Quinitio, Sheila Mae Santander-de Leon, Jon P. Altamirano
OCEAN & COASTAL MANAGEMENT
(2018)
Article
Environmental Sciences
Jon P. Altamirano, Jurgenne H. Primavera, Ma. Regina N. Banaticla, Hisashi Kurokura
WETLANDS ECOLOGY AND MANAGEMENT
(2010)
Article
Fisheries
Jon P. Altamirano, Roselyn D. Noran-Baylon
Article
Fisheries
Jon P. Altamirano, Minin J. Sinsona, Olivier Josh C. Caasi, Margarita de la Torre-de la Cruz, Wilfredo H. Uy, Roselyn Noran-Baylon, Marie Antonette Juinio-Menez
Summary: The hatchery production of tropical sea cucumber Holothuria scabra has faced challenges in up-scaling production in the Philippines due to limited land-based facilities, leading to research on ocean-based sandfish nurseries. Wind stress was found to be the most significant driver of variability in sandfish culture performances, impacting growth and survival of juveniles. The study provides valuable information on suitable ocean nursery conditions and spatial-temporal considerations for optimizing production of H. scabra juveniles.
Article
Fisheries
Jay R. C. Gorospe, Jon P. Altamirano, Marie Antonette Juinio-Menez
AQUACULTURE RESEARCH
(2017)
Article
Marine & Freshwater Biology
J. H. Primavera, J. P. Altamirano, M. J. H. L. Lebata, A. A. delos Reyes, C. L. Pitogo
BULLETIN OF MARINE SCIENCE
(2007)
Meeting Abstract
Marine & Freshwater Biology
Jon P. Altamirano
BULLETIN OF MARINE SCIENCE
(2007)
Article
Fisheries
Miguel Petrere Jr, Davi Butturi-Gomes
Summary: This short communication aims to raise awareness about the misuse of confidence intervals in Ecology and Fisheries statistical models that ignore the lack of independence.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Peter-John F. Hulson, Benjamin C. Williams
Summary: This study evaluates the impact of considering ageing error and growth variability on the determination of input sample size (ISS) in statistical catch-at-age assessment models. The results show that including these sources of uncertainty decreases the ISS determined through bootstrap methods. This indicates that there is more variability in age composition and conditional age-at-length data than previously accounted for. Including these sources of uncertainty improves the estimation of ISS and subsequently improves the quality of stock assessment models.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jason M. Cope
Summary: Fishery resource assessment is a complex and challenging task, but with the use of different analysis methods and tools, effective management guidance can be provided even with limited data and resources.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Regina L. Cunha, Joana I. Robalo, Sara M. Francisco, Ines Farias, Rita Castilho, Ivone Figueiredo
Summary: Recent advances in genomics have greatly contributed to the assessment of fish stocks by providing precise identification of genetic boundaries. This study used a genotyping-by-sequencing approach to reveal the existence of an additional genetic cluster of blackspot seabream in the northeast Atlantic, which was not previously identified. Factors such as ocean circulation patterns and local upwelling may play a role in the genetic differentiation observed in this study.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Huihua Lee, Mark N. Maunder, Kevin R. Piner
Summary: Estimating growth is important for fish population assessment. Integrated assessment models and the influence of misfitting size composition data have renewed interest in how growth is modeled. The available data types control how the length-at-age relationship is estimated. Estimating length-at-age is complex due to multiple sources of biological variability and difficulties in obtaining representative samples.
FISHERIES RESEARCH
(2024)
Article
Fisheries
A. Ladino, I. Perez-Arjona, V. Espinosa, M. Chillaron, V. Vidal, L. M. Godinho, G. Moreno, G. Boyra
Summary: This study examines the acoustic properties of skipjack tuna and Atlantic mackerel, both bladderless pelagic fish species, and explains the significant differences observed. The research shows that the differences in material properties of their tissues predict a more than 10 dB greater reduced target strength in skipjack compared to mackerel at certain frequencies.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Nelly Pena-Cutimbo, Cristel Cordero-Maldonado, Clara Ortiz-Alvarez, Joanna Alfaro-Shigueto, Jeffrey C. Mangel
Summary: Bycatch is a global problem for marine megafauna. This study assessed the bycatch interactions of the Peruvian artisanal purse-seine fishery in 2019 and found that all taxa groups were affected by bycatch. Dusky dolphins, guanay cormorants, and eagle rays were the most frequently reported bycatch species.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jen-Ming Liu, Po-Yuk So
Summary: The set-net fishery is an environmentally friendly fishery posing little risk to the marine ecosystem. This study identified ocean temperature, sea surface factors, and climatic factors as the main factors affecting the installation of set-nets.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Josie L. Palmer, Carina Armstrong, Hasan D. Akbora, Damla Beton, Cigdem Caglar, Brendan J. Godley, Kristian Metcalfe, Meryem Ozkan, Robin T. E. Snape, Annette C. Broderick
Summary: Small-scale fisheries are vital for global food security and cultural heritage, but the lack of information hampers effective management and mitigation of ecological impacts. This study provides the first comprehensive overview of the small-scale fishery fleet in Northern Cyprus. The fleet operates mainly over the continental shelf, using static and demersal gear types, and catches a diverse range of species, some of which are threatened. The findings can be used to improve fisheries management and conservation measures.
FISHERIES RESEARCH
(2024)