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My encyclopedia of the sea
\"Introduces the reader to facts about the sea\"-- Provided by publisher.
Book
Glyphosate: A Terrestrial Threat to Marine Plants? A Study on the Seagrass Zostera marina
Glyphosate-based herbicides (GBHs) are extensively used worldwide, raising concerns about their potential effect on non-target aquatic ecosystems. This study investigated the short-term physiological effects of a commercially available GBH on the seagrass Zostera marina under controlled mesocosm conditions. Z. marina individuals were exposed to three concentrations of glyphosate (0.165, 51, and 5100 mg L−1) for 4 days, and the impacts on photosynthetic performance, growth rate, photosynthetic pigments content and energy metabolism were assessed. Exposure to 5100 mg L−1 of glyphosate caused rapid water acidification and complete plant mortality within 24 h. Exposure to 51 mg L−1 of glyphosate significantly impaired photosynthetic efficiency and foliar growth rate. Energy availability, photosynthesis and photosynthetic pigments content were highly disrupted at both higher concentrations. Exposure to 0.165 mg L−1 of glyphosate decreased the foliar chlorophyll a/b ratio. These findings show that Z. marina can potentially be threatened by the presence of GBHs even at lower concentrations and underscore the necessity for monitoring herbicide pollution in coastal waters to protect seagrass habitats and associated ecosystems. Further research is needed to assess long-term effects and the role of herbicide formulations in mediating toxicity.
Journal Article
Exploring oceans
\"Super Explorers take you to the farthest depths of the ocean to explore the weirds places and the weird creatures and plants that live there.\"-- Provided by publisher.
Nutrient uptake in Gracilaria corticata var. cylindrica with optimized AMPEP treatment under different nutrient conditions
The nutrient uptake, growth, and biochemical changes of the red seaweed Gracilaria corticata var. cylindrica, treated with Ascophyllum marine plant extract powder (AMPEP) (0.1 g L−1, 30 min) was, estimated after in vitro cultivation with inorganic synthetic chemical media for 14 days, to evaluate its potential for biofiltration in aquaculture systems. The time course nutrient uptake study demonstrated the impact of G. corticata var. cylindrica on ammonia, nitrate, and phosphate depletion in incubation media. The results indicated that AMPEP-treated seaweed influenced the depletion rate of all three nutrients, with maximum ammonia and nitrate depletion occurring after approximately 48 h and relatively stable phosphate levels over time (nutrient uptake rate). The maximum uptake of 270 μM g− 1 DW h− 1 of ammonium was observed, followed by nitrate (58.13 μM g− 1 DW h− 1) and phosphate (19.58 μM g− 1 DW h− 1). Seaweed fragments with 32 µg ml− 1 of phosphate showed a higher significant growth rate (2.41 ± 0.07% day− 1) than the control. The highest (1365.29 ± 78.61 µg g− 1) carbohydrate content was observed in 250 µg ml− 1 concentration of ammonia. The concentration of 128 µg ml− 1 of nitrate showed the highest (521.60 ± 50.5 µg g− 1) protein content. However, at 175 µg ml− 1 ammonia, the highest levels of R-phycocyanin (152.46 ± 28 µg g− 1) and R-phycoerythrin (237.19 ± 36.1 µg g− 1) were observed. Results show that the nutrient treatment positively affects G. corticata var. cylindrica growth and development and changes the biochemical composition, especially in carbohydrate, protein, and pigment concentration. G. corticata var. cylindrica has tremendous potential to be used in Integrated Multi-Trophic Aquaculture and reduce organic matter loading into the marine environment.
Journal Article
Oceans and seas!
Explores the plants, animals, and ecology of oceans and seas. Includes 25 science projects and links to online resources.
Book
Harnessing marine plant extracts for sustainable agriculture, livestock management, industrial use, and biomedical applications
Marine plants are emerging as versatile resources for bioactive compounds with antioxidant, antibacterial, anti-inflammatory, and anticancer properties. Beyond their therapeutic potential, marine extracts offer agronomic and industrial value as biostimulants, natural pigments, biodegradable packaging materials, and green corrosion inhibitors, and serve as reducing agents in the synthesis of biomedical nanoparticles. This review integrates evidence from 256 studies (2011–2025), revealing rapid growth in the field over the past two years. The findings highlight the capacity of marine extracts to enhance crop and livestock productivity, yield stable natural dyes, create smart polysaccharide-based films, and protect metals via phenolic and sulfated polysaccharide fractions. Nanoparticles synthesized from these extracts exhibit improved biological performance. By linking agricultural, industrial, and biomedical perspectives, this work underscores the multifaceted potential of marine plant extracts and outlines future priorities in molecular characterization, strain development, and scalable green processing.
Journal Article
Evolution of primary producers in the sea
This text reference examines how photosynthesis evolved on Earth and how phytoplankton evolved through time - ultimately to permit the evolution of complex life, including human beings. The first of its kind, this book provides thorough coverage of key topics, with contributions by leading experts in biophysics, evolutionary biology, micropaleontology, marine ecology, and biogeochemistry.This exciting new book is of interest not only to students and researchers in marine science, but also to evolutionary biologists and ecologists interested in understanding the origins and diversification of life. Primary Producers of the Sea offers these students and researchers an understanding of the molecular evolution, phylogeny, fossil record, and environmental processes that collectively permits us to comprehend the rise of phytoplankton and their impact on Earth's ecology and biogeochemistry. It is certain to become the first and best word on this exhilarating topic.
* Discusses the evolution of phytoplankton in the world's oceans as the first living organisms and the first and basic producers in the earths food chain* Includes the latest developments in the evolution and ecology of marine phytoplankton specifically with additional information on marine ecosystems and biogeochemical cycles* The only book to consider of the evolution of phytoplankton and its role in molecular evolution, biogeochemistry, paleontology, and oceanographic aspects * Written at a level suitable for related reading use in courses on the Evolution of the Biosphere, Ecological and Biological oceanography and marine biology, and Biodiversity
eBook
Dory story
While taking a bath with his new red toy dory, a boy imagines himself alone on the ocean getting a first-hand look at the ocean's food chain.
Book
Management of Green Waste Streams from Different Origins: Assessment of Different Composting Scenarios
The organic wastes of plant origin and, in particular, those coming from sources related to tourism activities, such as those generated from golf courses and touristic coasts, constitute an increasing concern due to the rise in their production and their unsuitable management. Thus, this work aimed to assess the use of different composting strategies to manage these specific green wastes, such as grass clippings and pruning waste from a golf course and marine plant debris, mainly from posidonia (Posidonia oceanica L.). To this end, two composting scenarios were established: the first only considered green wastes in the composition of the composting mixtures, and the second used sewage sludge as a co-composting agent. The temperature of the piles was monitored, and physicochemical and chemical parameters were also studied throughout the process. The results obtained showed that composting is a feasible method to manage and recycle this type of green waste, obtaining end products with suitable physicochemical and chemical characteristics. However, proportions of sea plant wastes in the composting mixture higher than 30% can compromise the fertilizing value of the final compost. Moreover, the use of an additional co-composting agent (sewage sludge) improved the characteristics of the end products obtained, provided that this co-composting agent had suitable initial characteristics.
Journal Article