WorldCat Identities

Biologie des organismes et écosystèmes aquatiques (Paris / 2009-....).

Overview
Works: 4 works in 6 publications in 2 languages and 6 library holdings
Roles: Other
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Most widely held works by Biologie des organismes et écosystèmes aquatiques (Paris / 2009-....).
Etude du cumul d'impact autour du parc éolien offshore de la Baie de Seine : quelles conséquences pour le fonctionnement trophique de l'écosystème, sa résilience et les services écosystémiques? by Quentin Nogues( )

2 editions published in 2021 in French and held by 2 WorldCat member libraries worldwide

As the human population grows, the number and the intensity of anthropogenic activities increases oncoastal systems. These activities can have significant effects on the environment and on ecosystems.Furthermore, the wide range of coastal activities implies that coastal ecosystems are almost always subject tomultiple ecological drivers induced by humans. These drivers can interact with each other, leading to cumulativeeffects, which can have significant, and difficult to predict, consequences on ecosystems. In the context of thedevelopment of marine renewable energy in France, this thesis implements innovative methods to quantify theseparate and combined effects of multiple ecological drivers, including: the future Courseulles-sur-Mer offshorewind farm, climate change, and the effect of Brexit on fishing regimes. We studied the combined effects ofthese drivers on the functioning and resilience of the Seine Bay ecosystem using holistic ecosystem approaches.Our results indicate that interactions between drivers are numerous and complex, yet the potentialstructuring effects of drivers on ecosystem functioning play a determining role in the formation of cumulativeeffects. Cumulative effects appear to be heterogeneous between the functional properties of ecosystems andspecific to the studied ecosystems. It is therefore important to carry out local functional studies of thecombination of multiple drivers, to determine the effects of humans on ecosystems, as well as to evaluate theeffects of combined drivers on the provisioning of ecosystem services
Rôle de la colonnisation d'infrastructures marines sur la production et la biodiversité des écosystèmes côtiers en Manche by Baptiste Vivier( )

2 editions published in 2021 in French and held by 2 WorldCat member libraries worldwide

L'accroissement des pressions anthropiques sur les écosystèmes marins et côtiers, en particulier en Manche, provoquent des modifications des habitats, des écosystèmes et des différentes fonctions écosystémiques associées. La construction d'ouvrages maritimes et côtiers tels que les digues ou des ouvrages portuaires ainsi que l'émergence de plusieurs projets d'implantation d'éoliennes off-shore est en augmentation constante sur les côtes de la Manche française. Avec ces différents projets, la bétonisation de certains habitats devient inévitable, il est donc primordial d'évaluer leurs impacts écosystémiques, et, si possible, de les limiter. Le projet MARINEFF est né dans ce contexte, il vise à concilier développement humain et bénéfice écologique. Le développement de ces nombreuses infrastructures côtières crée de nouveaux habitats. L'objectif de ces travaux a été d'évaluer les processus de colonisation biologique à différentes échelles ainsi que certaines fonctions écologiques comme la production primaire sur différents types d'infrastructures marines en conditions contrôlées et en situation in situ dans deux sites La Rade de Cherbourg et la baie de Seine. Les mesures de fluorescence modulée (PAM) réalisées sur les différents compartiments de producteurs primaires benthiques ont permis d'évaluer la fonction de production primaire et son évolution en fonction des forçages testés ou observés. Une part importante de ce travail s'est concentrée sur l'étude du microphytobenthos de substrat dur, sa croissance, sa photobiologie en relation avec le type de substrat colonisé, sa structure de surface et l'impact de différents forçages sur ces paramètres. A une plus grande échelle, le développement des communautés benthiques a également été caractérisé sur les deux sites et sur différentes infrastructures. Des mesures de production primaire in situ associées à des mesures de biodiversité et de PAM ont permis de décrire les processus de colonisation d'infrastructures artificielles et d'évaluer leur efficacité. Ces travaux apportent une nouvelle vision à l'écologie benthique associée aux substrats durs artificiels et apportent des estimations fiables de l'impact de ces structures sur l'écosystème
Sensory adaptations in shrimp from deep hydrothermal vents : Comparison of chemo- and thermo-sensory abilities in the vent species Mirocaris fortunata and the coastal species Palaemon elegans by Julia Machon( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Alvinocaridid shrimp are an emblematic taxon at hydrothermal vents on the Mid-Atlantic Ridge, but how they locate active vents and detect their habitat is still enigmatic. They might use the chemical and thermal signatures of the hydrothermal fluid as orientation cues. The chemo- and thermosensory abilities of the hydrothermal species Mirocaris fortunata and the coastal species Palaemon elegans were investigated using various approaches. Structural features of the peripheral and central nervous system were used as rough estimates of their olfactory abilities. The co-ionotropic receptor IR25a, involved in chemodetection, was identified and located in the antennal appendages. A new electroantennography method was developed to test the detection of hydrothermal fluid chemicals. Several attraction tests were conducted at atmospheric and in situ pressure to investigate the behavior of the vent and shallow-water species when exposed to a food odor, sulfide and warm temperatures. Altogether, these results provide advances in the knowledge of the chemosensory biology of vent shrimp, and a substantial background for future researches on sensory adaptations to the hydrothermal environment
Inférence des interactions entre processus évolutifs by Abdelkader Behdenna( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

In this thesis, we have developed a tool to detect co-evolution, ie the joined evolution of different biological entities (nucleotides, amino acids, organic functions), on different scales (molecular, organ). This tool is applied to phylogenetic trees on which evolutionary events (mutations, gain / loss of biological functions) are placed. We consider an abstract framework in order to work on the processes leading to the emergence of evolutionary events along the lineages of a phylogenetic tree. This tool consists of two separate parts, each with its own specificities.On the one hand, we have produced a first simple, highly effective method to detect from a very large number of such processes, which pairs events seem to appear jointly in the tree. Using a mathematical formalism using the properties of the bilinear algebra, exact calculations of expectancy, variance and even probability distributions are possible and allow to associate exact p-values to these pairs, making this method very precise.On the other hand, we have developed a model of coevolution between such evolutionary processes. This mathematical model severely limits the number of parameters used and allows us to calculate and maximize a likelihood function. This optimization is similar to searching the parameters of a model explaining the best the observed contemporary data, and allows us as well, according to our model, to determine the most likely scenario that led to the observed data.This second method requires more computing time, which invites to combine the two methods in a pipeline allowing us to efficiently process a large number of pairs before proceeding further in our study and test the most promising pairs using our mathematical model in order to describe a scenario interpreted in a biological context. We have tested this tool by using simulations, before applying it to two very different biological examples: the link between intracellularity and loss of flagellum in Escherichia coli, and the study of all the pairs of nucleotides in sequences 16S rRNA of a sample of gamma-Enterobacteria
 
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Alternative Names
Biologie des mollusques marins et des écosystèmes associés (Caen)

Biologie des Organismes et Écosystèmes Aquatiques facility in Paris, France

Biologie des organismes marins et écosystèmes (Paris)

BIOMEA (Caen)

BOME (Paris)

BOREA (Dinard, Ille-et-Vilaine)

BOREA (Paris)

FRE 2030

Laboratoire de biologie des organismes et écosystèmes aquatiques (Paris)

UMR 7208

UMR 8067

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