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GBZ General Biology, Zoology & Biophilosophy --- bacteria --- general biology --- heterotrophic bacteria --- keys

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With a volcanic origin, Lake Kivu is deep and meromictic, and shows a very particular limnology and some astonishing features. The data available on its limnology and phytoplanktic communities are limited, dispersed or outdated. This is the first deep, long term study (2002-2004) on limnology and phytoplankton ecology of Lake Kivu, combining different techniques: HPLC analysis of marker pigments, flow cytometry, light, epifluorescence and electron microscopy. Lake Kivu combines a relatively shallow euphotic layer (~18m) usually smaller than its mixed layer (20 – 60 m), and with a weak thermal gradient in the mixolimnion. With an annual average chlorophyll a in the mixed layer of 2.2 mg m-3 and low nutrient levels in the euphotic zone, the lake is clearly oligotrophic. Concerning its phytoplanktonic composition, the most common species were the pennate diatoms Nitzschia bacata Hust. and Fragilaria danica (Kütz.) Lange Bert., and the cyanobacteria Planktolyngbya limnetica (Lemm.) Komárková-Legnerová and Cronberg and Synechococcus sp. Diatoms were the dominant group in the lake, particularly during the dry season episodes of deep mixing. During the rainy season, the stratified water column, with high light and lower nutrient availability, favoured dominance of cyanobacteria. Phycoerythrin-rich phototrophic picoplankton and heterotrophic bacteria cell numbers were constantly high, with relatively subtle spatial, seasonal and vertical variations. In open lake waters, where allochthonous carbon inputs are most probably inconsequential, HNA heterotrophic bacteria abundance is strongly correlated with chlorophyll a. Recent investigations revealed an increasing methane production in the deep waters during the past three decades, leading to an accumulation of gas and the subsequent lowering of the energy required to trigger a devastating release of gasses. The role of primary producers and the probable changes on the export ratio of the organic matter into deep waters after t

inter-annual variations --- phytoplankton ecology --- Lake Kivu --- seasonality --- East African Great Lakes --- methane --- Synechococcus --- picoplankton --- heterotrophic bacteria --- algae --- diversity --- taxonomy --- large tropical lake --- stoichiometry --- East Africa --- large lake --- primary production --- phytoplankton --- tropical and oligotrophic lake --- functional classification

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Air pollution, due to natural and anthropogenic sources, incurs enormous environmental costs. The issue of healthy living spaces and good air quality is a global concern, because each individual inhales 15,000 L of air every 24 h. Thus, contemporary monitoring and reducing exposure to air pollutants presents a particular challenge. One of the crucial indicators of indoor and outdoor air quality is bioaerosols. They play an instrumental role as risk factors when it comes to adverse health outcome. These indicators, also known as primary biological airborne particles (PBAPs), have been linked to various health effects such as infectious diseases, toxic effects, allergies, and even cancer. PBAPs include all particles with a biological source in suspension in the air (bacteria, fungi, viruses, and pollen), as well as biomolecules (toxins, and debris from membranes). To foster our current scientific knowledge on bioaerosols, research related to the characteristics of biological aerosols in indoor and outdoor environments, the methods used to improve air quality, as well as the health effects of and exposure assessments to bioaerosols, have been collected in this book.

radiant catalytic ionization --- Enterococcus spp. --- Clostridioides difficile --- Staphylococcus aureus --- MRSA --- indoor air --- microbiological indoor air quality (MIAQ) --- bacterial aerosol (BA) --- size distribution --- gymnastic hall --- multi-antibiotic resistance (MAR) --- indoor microclimate --- decentralized façade ventilation --- air quality --- indoor air quality --- microbiological contamination --- heterotrophic bacteria --- antimicrobial resistance --- mannitol-positive staphylococci --- fungi --- biological air pollutants --- fungal aerosol --- air cleaner --- life cycle assessment --- n/a --- decentralized façade ventilation

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The dazzling variation in plant chemistry is a primary mediator of trophic interactions, including herbivory, predation, parasitism, and disease. At the same time, such interactions feed back to influence spatial and temporal variation in the chemistry of plants. In this book, Mark Hunter provides a novel approach to linking the trophic interactions of organisms with the cycling of nutrients in ecosystems.Hunter introduces the concept of the "phytochemical landscape"-the shifting spatial and temporal mosaic of plant chemistry that serves as the nexus between trophic interactions and nutrient dynamics. He shows how plant chemistry is both a cause and consequence of trophic interactions, and how it also mediates ecosystem processes such as nutrient cycling. Nutrients and organic molecules in plant tissues affect decomposition rates and the fluxes of elements such as carbon, nitrogen, and phosphorus. The availability of these same nutrients influences the chemistry of cells and tissues that plants produce. In combination, these feedback routes generate pathways by which trophic interactions influence nutrient dynamics and vice versa, mediated through plant chemistry. Hunter provides evidence from terrestrial and aquatic systems for each of these pathways, and describes how a focus on the phytochemical landscape enables us to better understand and manage the ecosystems in which we live.Essential reading for students and researchers alike, this book offers an integrated approach to population-, community-, and ecosystem-level ecological processes.

Variation (Biology) --- Environmental chemistry. --- Botanical chemistry. --- Phytochemicals. --- Animal-plant relationships. --- Autotrophic bacteria. --- Heterotrophic bacteria. --- Bacteria, Heterotrophic --- Bacteria --- Bacteria, Autotrophic --- Animal-plant interactions --- Animals and plants --- Interactions, Animal-plant --- Plant-animal interactions --- Plant-animal relationships --- Plants and animals --- Relationships, Animal-plant --- Ecology --- Botanical chemicals --- Plant chemicals --- Chemicals --- Botanical chemistry --- Phytochemistry --- Plant biochemistry --- Plant chemistry --- Biochemistry --- Botany --- Phytochemicals --- Plant biochemical genetics --- Chemistry, Environmental --- Chemistry --- Biological variation --- Biology --- Heredity --- Genetics --- Mutation (Biology)