Article
Plant Sciences
Brian P. Ulaski, Brenda Konar
Summary: The study examined how the high latitude estuarine bull kelp Nereocystis luetkeana foregoes the free-living microscopic stages by releasing embryonic sporophytes directly from sori. The research found that there were no significant differences in the release of embryonic sporophytes from sori based on parental age or attachment status. This direct release of embryonic sporophytes from adult sporophytes may have ecological advantages for N. luetkeana.
Article
Plant Sciences
Brooke L. Weigel, Sadie L. Small, Helen D. Berry, Megan N. Dethier
Summary: Warming ocean temperatures and low nutrient concentrations have led to declines in bull kelp populations in the Salish Sea. In laboratory experiments, high temperatures had a more negative impact on microscopic stages of bull kelp compared to low nitrogen levels. Gametophytes were most abundant between 10 and 16℃, while sporophyte production peaked at 10-14℃. Field observations confirmed that the thermal limits for gametophyte growth (18℃) and sporophyte production (16-18℃) were reached during the summer. Caution should be taken to prevent prolonged exposure of bull kelp gametophytes to temperatures above 16℃, as it could limit reproduction and recruitment of adult sporophytes.
JOURNAL OF PHYCOLOGY
(2023)
Article
Plant Sciences
Pablo P. Leal, Michael Y. Roleda, Pamela A. Fernandez, Udo Nitschke, Catriona L. Hurd
Summary: The study found that M. pyrifera reproduces year-round in different wave exposure environments in southern New Zealand, with similar patterns under different wave exposure conditions. Morphological characteristics vary with wave exposure, with individuals from wave-protected sites having larger and longer blades.
JOURNAL OF PHYCOLOGY
(2021)
Article
Plant Sciences
Fernando Tempera, David Milla-Figueras, Ana Luisa Sinde-Mano, Elizabeth Atchoi, Pedro Afonso
Summary: New kelp records in the Azores extend the known distribution range and highlight poor knowledge of mesophotic environments in Macaronesia. These new occurrences add conservation value to coastal areas but also raise management needs and climate change impacts.
JOURNAL OF PHYCOLOGY
(2021)
Article
Plant Sciences
Jordan A. Hollarsmith, Juliana C. Cornett, Emily Evenson, Alex Tugaw
Summary: This study examines the changes in spatial coverage and species composition of kelp in coastal Alaska over the past century. The results show an increase in the spatial extent of kelp in the Gulf of Alaska, with extensive recovery in Southcentral Alaska after the eruption of the Novarupta volcano. The persistence and spatial increase of kelp in Southeast Alaska closely match the range expansion of sea otters. Observations also indicate an increase in thermally tolerant kelp species compared to cold-adapted species.
Article
Biotechnology & Applied Microbiology
Antonio Bevilacqua, Barbara Speranza, Leonardo Petruzzi, Milena Sinigaglia, Maria Rosaria Corbo
Summary: This research assessed the effects of different acids and pH values on A. acidoterrestris and found that ascorbic acid was the most effective compound. Activated spores showed the highest sensitivity to acids, indicating that acids may act during the outgrowing phase. The two strains exhibited different resistance at pH 3.0.
Article
Food Science & Technology
Micha Peleg
Summary: In the past, the lack of mathematical tools to handle nonlinearities hindered the modeling of microbial inactivation and growth, and chemical degradation or synthesis reactions in foods. Linearized model equations were used as a substitute, especially for microbial inactivation, which still serves as the basis for sterilization criteria. However, modern numerical methods and user-friendly computer software have now made it possible to accelerate calculations, challenge old concepts, and revise or replace traditional models.
CURRENT OPINION IN FOOD SCIENCE
(2023)
Article
Microbiology
Agnieszka Chojecka
Summary: Research on the susceptibility of anaerobic bacteria spores is crucial for evaluating the sporicidal activity of disinfectants. The diverse susceptibility of these spores may result in different disinfection parameters being determined by laboratories. This study finds that the susceptibility of Clostridium sporogenes spores to disinfectants is similar to that of Clostridioides difficile spores.
POLISH JOURNAL OF MICROBIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Yoichi Sato, Hikari Nagoe, Gregory N. Nishihara, Ryuta Terada
Summary: The study investigated the effects of photosynthetically active radiation (PAR) and temperature on the photosynthesis of Undaria pinnatifida. It was found that the optimum temperature for photosynthesis was 18 degrees Celsius, and there were differences in high temperature and irradiance tolerance between mature sporophytes and juvenile sporophytes.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Agronomy
Kenia C. Sanchez Espinosa, Maria Fernandez-Gonzalez, Michel Almaguer, Guillermo Guada, Francisco Javier Rodriguez-Rajo
Summary: Rust, a damaging disease for wheat crops in Spain, has been studied to determine its presence and quantity in the air. The study found that temperature was the most influential meteorological variable on Puccinia concentrations in the air. A modified prediction model allowed for the tentative prediction of increased Puccinia concentrations in 2022.
Article
Geosciences, Multidisciplinary
Shi Ren, Bangwen Zhang, Wei-Jie Wang, Yuan Yuan, Chao Guo
Summary: Through measures like upstream sediment trapping and sediment peak regulation, the incoming sediment load of TGR has been significantly reduced, successfully addressing sedimentation issues and providing valuable lessons for reservoir management elsewhere.
Article
Environmental Sciences
Siamak Baharvand, Biswajeet Pradhan
Summary: This study evaluated erosion and flood susceptibility using empirical models and prioritized GIS-based prone zones in the Kopet-Dagh Mountains catchment area. The results showed that the upstream catchments are most susceptible to erosion and floods. In addition, the models demonstrated good performance and sensitivity, as confirmed by the validation process.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Engineering, Environmental
Qiqi Wan, Ruihua Cao, Gang Wen, Xiangqian Xu, Yuancheng Xia, Gehui Wu, Yangfan Li, Jingyi Wang, Yingzi Lin, Tinglin Huang
Summary: The use of sequential application of UV and Cl-2 on fungal spores showed enhanced inactivation efficiency, especially in processes involving UV/Cl-2 or at a wavelength of 280 nm, promoting the formation of intracellular reactive oxygen species and leading to more severe damage to the spores.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Infectious Diseases
Sahar Torki Baghbadorani, Ebrahim Rahimi, Amir Shakerian
Summary: The present study provides data on the virulence and antibiotic resistance of Bacillus cereus isolated from various spices. The prevalence of B. cereus is high in spices, and these strains show high resistance to beta-lactam antibiotics, especially ampicillin and penicillin. Moreover, most of the isolates have the ability to produce diarrhoeal toxins. Regular surveillance of B. cereus in spices and food products is necessary to ensure food safety in Iran.
CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
C. Biancacci, J. C. Sanderson, B. Evans, D. L. Callahan, D. S. Francis, V. M. Skrzypczyk, E. E. Cumming, A. Bellgrove
Summary: Macrocystis pyrifera, also known as giant kelp, is a key species that provides important habitats and food for various species in coastal ecosystems worldwide. This study compared the effect of proximity to salmon aquaculture sites on the nutritional value and metal profiling of wild M. pyrifera populations. The results showed that lipid contents and some fatty acids were higher in samples near salmon farms, while moisture content was higher in distal samples. The concentrations of protein, ash, and carbohydrates varied inconsistently with proximity to salmon cages. Metal levels were low and not a concern for human consumption. These findings help understand the potential of farming M. pyrifera in combination with finfish aquaculture and identify possible commercial applications in the Australian market.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)