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OCEANOLOGIE --- DISTRIBUTION DES NUTRIMENTS --- EUROPE --- PORTUGAL

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A narrative account of how estuaries around the world are being altered by human forces and human-induced global climate changes, Climate Change and Coastal Ecosystems: Long-Term Effects of Climate and Nutrient Loading on Trophic Organization chronicles a more than 40-year-old research effort conducted by Dr. Robert J. Livingston and his research team at Florida State University. Designed to evaluate system-level responses to natural and anthropogenic nutrient loading and long-term climate changes, the study focused on the northeast Gulf of Mexico river-bay systems, and concentrated on phytoplankton/benthic macrophyte productivity and associated food web organization. It addressed the changes of food web structure relative to long-term trends of climatological conditions, and was carried out using a combination of field-descriptive and experimental approaches.

Coastal ecology --- Climatic changes --- Nutrient pollution of water --- Écologie des rivages --- Climat --- Eau --- Changements --- Pollution par les nutriments

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Comprehensive resource providing holistic coverage of the effect of body microbiomes on the health of dogs and catsVeterinary Small Animal Microbiomes and Nutrition offers new perspective on the prevention and treatment of common health conditions in dogs and cats that arise from or result in dysbiosis of the body's microbiomes, along with providing alternative first-line solutions of utilizing nutrients--less invasive procedures in comparison to prescription drugs to treat dysbiosis in the body's microbiomes. This practical manual guides the reader through body systems that are commonly influenced by the microbiota in the microbiomes as well as accompanying dietary recommendations.Initially, an overview of the body's microbiome including common terminology and functions of microbiomes precede the chapters on development of the body's microbiomes and factors influencing their diversity and density. The following three sections provide readers with a different perspective of commonly observed health conditions by focusing on the state of the microbiome and how the condition may be prevented and/or treated with the use of nutrients.Written by a highly qualified author with significant experience in the field, Veterinary Small Animal Microbiomes and Nutrition includes information on sample topics such as:* Results of research on alternative diets and emerging ingredients' effect on the microbiomes and how to have the discussions with pet parents* Nutrition focused calculations, feeding directions, and templates for history, and recommendation for follow-up conversations with pet parents* Factors affecting the diversity and density of the microbiomes, such as genetics, age, sex, environment, stress, antibiotic therapy, and nutrition* Integumentary microbiomes, covering the skin's microbiome, dysfunctional barrier syndrome, atopy (atopic dermatitis), and key nutritional factorsVeterinary Small Animal Microbiomes and Nutrition is an essential resource for students completing companion animal health courses in two- and four-year programs, particularly those in veterinary technology, veterinary technician, and animal health technology diplomas and degrees, and it is also highly useful for students in other veterinary and animal science focused programs. Additionally, this book is essential in the library of veterinary practices as they introduce microbiome medicine into their practices.

Animal Nutritional Physiological Phenomena. --- Dogs. --- Cats. --- Gastrointestinal Microbiome. --- Animal Husbandry. --- Nutrients. --- Dysbiosis --- Chien. --- Chat domestique. --- Flore intestinale. --- Élevage. --- Dysbiose --- Nutriments. --- veterinary. --- Chez les animaux.

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Nutrient pollution of water --- Eutrophication --- Water quality --- Eau --- Eutrophisation --- Pollution par les nutriments --- Qualité --- Water --- Nitrogen content --- Phosphorus content --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Environmental Engineering --- Hydrology --- Freshwater --- Freshwater quality --- Marine water quality --- Quality of water --- Seawater --- Seawater quality --- Environmental quality --- Lakes --- Nutrient pollution of rivers, lakes, etc. --- Rivers --- Limnology --- Lake restoration --- Quality --- Composition --- Nutrient pollution --- Pollution

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Following the decrease in fundings for the Sahrawi refugees crisis, the average food basket has shrinked in terms of quantity and diversity, especially with fresh vegetables. With hopes of promoting local agriculture, chicken droppings underwent anaerobic digestion then aerobic digestion to create four bioponic solutions with different initial concentrations in minerals based on nitrogen (N) (65mgN/L, 90mgN/L, 115mgN/L and 140mgN/L) for lettuce culture. The nitrification efficiencies were calculated, the causes of the loss of nitrogen were discussed, several physical parameters were monitored and bioponics was compared to conventional hydroponics. 
Bioponics and conventional hydroponics were equal in terms of the quantity produced. However the former led to lettuce richer in calcium, magnesium, zinc, manganese and sodium based on fresh weight. Conversely, those cultivated in hydroponics were richer in nitrogen.
In addition, it would be best to create bioponic nutrient solutions with initial nitrogen concentrations between 65mgN/L and 90mgN/L, then to add organic matter by fractions during culture. In fact, all the different concentrations led to similar productivity. However higher initial concentrations led to greater mineral losses, and lower nitrification efficiencies. 
Moreover, it was speculated that most nitrogen losses were linked to the incorporation of this element into bacterial biomass, the sedimentation of solid residues on the NFT systems and plant roots, and ammonia volatilization. The latter could have been responsible for up to 30% of the losses. Suite à la diminution des financements alloués à la crise des réfugiés Sahraouis, le panier alimentaire moyen fut réduit en termes de quantité et de diversité, surtout en matière de fruits et légumes. Avec l’intention de promouvoir l’agriculture locale, des fientes de poules ont subi une digestion anaérobie, suivie d’une digestion aérobie pour créer quatre solutions bioponiques avec différentes concentrations initiales en minéraux, basées sur l’azote (N) (65mgN/L, 90mgN/L, 115mgN/L and 140mgN/L) pour la culture de laitues. Les efficiences de nitrification furent calculées, les causes de perte en azote furent discutées, plusieurs paramètres physiques furent suivis et la bioponie fut comparée à l’hydroponie conventionnelle. 
La bioponie et l’hydroponie conventionnelle étaient égales en termes de quantité produite. Cependant, la bioponie a abouti à des laitues plus riches en calcium, magnésium, zinc, manganèse et sodium sur poids frais. Mais, celles produites en hydroponie étaient plus riches en azote. 
De plus, il serait préférable de créer des solutions nutritives bioponiques avec des concentrations initiales en azote entre 65mgN/L et 90mgN/L, puis de fractionner les ajouts de la matière organique durant la culture. Effectivement, toutes les différentes concentrations ont abouti à des productivités similaires. Néanmoins, des concentrations initiales plus élevées ont conduit à des pertes de minéraux plus importantes et des efficiences de nitrification plus faibles. 
Enfin, la perte d’azote est probablement liée à l'incorporation de cet élément dans la biomasse bactérienne, la sédimentation des résidus solides sur les systèmes NFT et les racines des plantes, et à la volatilisation de l’ammonium. Cette dernière pourrait être responsable de jusqu’à 30% des pertes en azote.

Bioponics --- Organic hydroponics --- Nitrification --- Aerobic digestion --- Anaerobic digestion --- Organic fertilisers --- Chicken faeces --- Lettuce --- Nitrogen loss --- Nutrient solution --- Nutrient uptake --- Bioponie --- Hydroponie organique --- Nitrification --- Digestion aérobie --- Digestion anaérobie --- Fertilisant organique --- Déjection de poules --- Laitues --- Perte d'azote --- Prélèvement de nutriments --- Solution nutritive --- Sciences du vivant > Agriculture & agronomie