Article
Multidisciplinary Sciences
Jack R. R. Davison, Rahim Rajwani, Gengxiang Zhao, Carole A. A. Bewley
Summary: Chrysophaeum taylorii is an understudied marine algae that can cause harmful coastal blooms and accumulate bioactive natural products, such as antibiotics. Whole genome sequencing revealed a diverse set of secondary metabolite biosynthetic genes in C. taylorii, along with a limited microbiome with less biosynthetic potential. Analysis of microbiome and biosynthetic genes supported an algal origin for the chrysophaentins, possibly through non-canonical polyketide synthase genes.
SCIENTIFIC REPORTS
(2023)
Article
Marine & Freshwater Biology
Setsuko Sakamoto, Weol Ae Lim, Douding Lu, Xinfeng Dai, Tatiana Orlova, Mitsunori Iwataki
Summary: Occurrences of harmful algal blooms (HABs) and associated fisheries damage have been continuously monitored since the 1970s along the coasts of East Asia. The highest bloom numbers were recorded in 1980 (Japan), in 1998 (Korea) and in 2003 (China), followed by decreasing trends in these countries. The shift in microalgal species composition, from dominance by diatoms to dinoflagellates after the 1980s in Korea and from diatoms to small haptophytes and cyanobacteria after 2013 in eastern Russia, has been observed.
Article
Biotechnology & Applied Microbiology
Colin Benitt, Craig S. Young, Laine H. Sylvers, Christopher J. Gobler
Summary: This study investigates the effects of two red seaweeds, Gracilaria tikvahiae and Dasysiphonia japonica, on A. anophagefferens and finds that they can reduce the cell concentrations of A. anophagefferens, thereby mitigating harmful algal blooms. The algicidal effects of Dasysiphonia japonica are significantly stronger than those of Gracilaria tikvahiae and other seaweeds.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Environmental Sciences
Jianan Zhu, Zhiming Yu, Liyan He, Xihua Cao, Hena Ji, Xiuxian Song
Summary: Based on field experience, it was found that modified clay (MC) can effectively inhibit the growth of residual algal cells and control harmful algal blooms (HABs) by changing the physical and chemical properties of clay particles on the surface, leading to chemical and electrochemical effects and physical collisions with residual cells. This study provides insights into the mechanism by which MC mitigates HABs through a combination of physical and chemical effects on residual cells, ultimately achieving a significant reduction in algal growth.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Engineering, Civil
Patrick Barrineau, Rens Janmaat, Tim Kana
Summary: Depth of closure (DOC) is commonly used to describe significant elevation changes along beach profiles, with various formulations often over-estimating values compared to empirical observations. In wave-dominant environments, modeled DOC values tend to be more accurate than in mixed-energy sites, where discrepancies can range from 1.0 to 5.7 meters deeper than observed values.
COASTAL ENGINEERING
(2021)
Article
Biology
Nina Guerin, Marta Ciccarella, Elisa Flamant, Paul Fremont, Sophie Mangenot, Benjamin Istace, Benjamin Noel, Caroline Belser, Laurie Bertrand, Karine Labadie, Corinne Cruaud, Sarah Romac, Charles Bachy, Martin Gachenot, Eric Pelletier, Adriana Alberti, Olivier Jaillon, Patrick Wincker, Jean-Marc Aury, Quentin Carradec
Summary: The smallest phytoplankton species play a crucial role in ocean biogeochemical cycling and are affected by global environmental changes. This study analyzed the abundance, ecological niche, and potential for adaptation of Pelagomonas calceolata in all oceans based on its complete assembled genome sequence. The results showed that P. calceolata is one of the most abundant eukaryotic species in the oceans, with its abundance favored by high temperature, low-light, and iron-poor conditions. Climate change projections suggest that the habitat of P. calceolata may extend towards the poles by the end of this century. The study also identified specific gene repertoire and expression level variations that may contribute to its ecological success in low-iron and low-nitrate environments.
COMMUNICATIONS BIOLOGY
(2022)
Article
Environmental Sciences
Zhengxi Zhou, Fanzhou Kong, Qingchun Zhang, Yan Gao, Florian Koch, Christopher J. Gobler, Zhenfan Chen, Yunfeng Wang, Rencheng Yu
Summary: The unique nutrient profile (rich in dissolved organic nitrogen but deficient in dissolved inorganic nitrogen) in the inshore waters of the Qinhuangdao coastal area could support the outbreak of brown tides caused by the pelagophyte Aureococcus anophagefferens. During the brown tides, the concentration of dissolved organic nitrogen was nearly five times higher than that of dissolved inorganic nitrogen. High levels of phytoplankton biomass and nutrients were observed in the inshore waters, and the distribution patterns of different nutrients were heterogeneous.
ENVIRONMENTAL RESEARCH
(2023)
Article
Plant Sciences
Andre V. F. Faria, Nuno T. Martins, Ligia M. Ayres-Ostrock, Carlos F. D. Gurgel, Estela M. Plastino
Summary: This study investigated the population genetic diversity and structure of Gracilariopsis tenuifrons in Brazil, revealing a significant genetic separation between the northeast and southeast regions, which are located near the Vitoria-Trindade seamount chain, suggesting it as the main biogeographical barrier to gene flow.
JOURNAL OF PHYCOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Seongho Ahn, Vincent S. Neary, Mohammad Nabi Allahdadi, Ruoying He
Summary: This study conducted a feasibility level characterization of nearshore wave energy resources on the East Coast of the United States, delineating eight wave energy climate regions to inform regional energy planning, WEC project development, and operation.
Article
Environmental Sciences
Phyllis A. Klarmann, John Scarpa, James X. Hartmann
Summary: Recurring brown tide algal blooms of Aureoumbra lagunensis in the lagoons of central Florida have had significant ecological impacts. This study investigates the feeding behavior of the pleated tunicate Styela plicata in response to A. lagunensis and Aureococcus anophagefferens. The results show that both brown tide species significantly impact the hourly filtration rates of the tunicate, suggesting their potential role in top-down control of these bloom-forming microalgae.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Gaelle F. Gilson, Hester Jiskoot, Soukeyna Gueye, John H. van Boxel
Summary: This study presents a comprehensive climatology of coastal fog along the East Greenland coast. Results indicate that the fog in the warm season is mainly advection fog, while in the cold season, it is primarily mixed-phase fog.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2023)
Article
Environmental Sciences
Nathaniel B. Weston, Elise Rodriguez, Brian Donnelly, Elena Solohin, Kristen Jezycki, Sandra Demberger, Lori A. Sutter, James T. Morris, Scott C. Neubauer, Christopher B. Craft
Summary: The stability of coastal wetlands is influenced by sea level, plant primary production, sediment supply, and wetland vertical accretion. Human activities have impacted sediment delivery to coastal areas along the U.S East Coast. Wetlands in areas with low sediment supply may struggle to keep pace with rising sea levels. This study shows that the vertical accretion and carbon accumulation in tidal wetlands along the U.S East Coast can be explained by relative sea level rise, sediment concentration in rivers, and coastal temperature.
Article
Multidisciplinary Sciences
Seaver Wang, Weiyi Tang, Erwan Delage, Scott Gifford, Hannah Whitby, Aridane G. Gonzalez, Damien Eveillard, Helene Planquette, Nicolas Cassar
Summary: The variation in microbial cycling of nutrients and carbon in the ocean is found to be an emergent property of complex planktonic communities, with a focus on the diversity and distribution of nitrogen fixing marine diazotrophs. Research shows a negative relationship between eukaryotic diversity and nitrogen fixation, with high rates of nitrogen fixation occurring at sites with high abundances of mixotrophic stramenopiles.
SCIENTIFIC REPORTS
(2021)
Article
Limnology
Jian Gao, Yuelei Dong, Xiaoyu Zhou, Lei Cui, Songhui Lu
Summary: Since 2009, a large-scale algal bloom caused by Aureococcus anophagefferens has been a problem in the coastal embayment of Qinhuangdao, China. This has negatively impacted the bay scallop agriculture industry. Researchers investigated the nutritional value of the brown tide cells and found that when cultured in nitrate, the cells had similar biochemical composition and polyunsaturated fatty acid content to commonly used species in bivalve feeding. However, the nutritional value decreased when cultured in urea.
JOURNAL OF OCEANOLOGY AND LIMNOLOGY
(2022)
Article
Environmental Sciences
Quang Nguyen Hao, Satoshi Takewaka
Summary: The study revealed that the 2011 Great East Japan Earthquake had a significant impact on the shoreline of northern Ibaraki Coast, causing a sudden retreat of 20-40 meters. The recovery speed of the shoreline varied depending on beach conditions, ranging from +2.6 meters/year to +6.6 meters/year.
