Saulo Jacques

UERJ - Universidade do Estado do Rio de Janeiro / Rio de Janeiro State University, Pós Graduação em Ecologia e Evolução, Graduate Student

Universidade Federal do Rio de Janeiro (UFRJ), Departamento de Ecologia, PhD Researcher

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Biologist, PhD in Ecology and Evolution at Rio de Janeiro State University studying the impacts of climate changes on diversity and role of microbial community in aquatic ecosystems.

Currently I'm researcher and developer at LANA where my activities are related to the shift on ecological paradigm, the knowledge in the era of big data and free technology as social technology.
Address: https://citizenscience.gitlab.io/

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Robert Lee Webb

Renato Figueiredo

Instituto Politecnico do Porto

Editor IJRET

Josh Bond

Eugene Vasserman

Kansas State University

Albert Zomaya

The University of Sydney

Sonia Jahid

University of Illinois at Urbana-Champaign

Jaydip Sen

Praxis Business School

Nimesh Kumar

Symbiosis International University Pune India

Karl Aberer

Ecole Polytechnique Federale de Lausanne

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Papers by Saulo Jacques

The LAIA Database A Secure and Decentralized Platform for Environmental Data

Lana, 2019

The current big amount of data also brings a question: How much we could trust on the sources we ... more The current big amount of data also brings a question: How much we could trust on the sources we access? At the same time we face a threat of groups considering socio-environmental data as an obstacle for the industrial and agribusiness interests. LAIA purposes a secure and trusted database where data is protected from censorship and access restrictions at the same time that ensure the trust on accessed data using an eective reputation score method. The paper presents the basic concepts of LAIA database and its potentialities as a safe and ecient platform for academics , citizen scientists and stakeholders.

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As Pesquisas Sem Relevância e o Interesse Público

by Saulo Jacques and S. Jacques

Lana, 2019

Em meio à crise sistêmica que enfrentamos, diversos grupos ensaiam a redução ainda mais radical d... more Em meio à crise sistêmica que enfrentamos, diversos grupos ensaiam a redução ainda mais radical dos investimentos em educação e pesquisa. Uma das justiicativas tenta comparar pesquisa cientííca à logica consumista do mercado. Neste pequeno texto, publicado originalmente na BioBox Magazine em 2017, levanto alguns dos pontos que considero relevantes para começarmos uma reavaliação do nosso papel no "fazer ciência" e para uma retomada do diálogo com a sociedade.

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Potential changes in bacterial metabolism associated with increased water temperature and nutrient inputs in tropical humic lagoons

by Saulo Jacques and Jean Remy Daveé Guimarães

Frontiers in Microbiology, 2015

Scofield V, Jacques SMS, Guimarães JRD and Farjalla VF (2015) Potential changes in bacterial meta... more Scofield V, Jacques SMS, Guimarães JRD and Farjalla VF (2015) Potential changes in bacterial metabolism associated with increased water temperature and nutrient inputs in tropical humic lagoons. Front. Microbiol. 6:310. Temperature and nutrient concentrations regulate aquatic bacterial metabolism. However, few studies have focused on the effect of the interaction between these factors on bacterial processes, and none have been performed in tropical aquatic ecosystems. We analyzed the main and interactive effects of changes in water temperature and N and P concentrations on bacterioplankton production (BP), bacterioplankton respiration (BR) and bacterial growth efficiency (BGE) in tropical coastal lagoons. We used a factorial design with three levels of water temperature (25, 30, and 35 • C) and four levels of N and/or P additions (Control, N, P, and NP additions) in five tropical humic lagoons. When data for all lagoons were pooled together, a weak interaction was observed between the increase in water temperature and the addition of nutrients. Water temperature alone had the greatest impact on bacterial metabolism by increasing BR, decreasing BP, and decreasing BGE. An increase of 1 • C lead to an increase of ∼4% in BR, a decrease of ∼0.9% in BP, and a decrease of ∼4% in BGE. When data were analyzed separately, lagoons responded differently to nutrient additions depending on Dissolved Organic Carbon (DOC) concentration. Lagoons with lowest DOC concentrations showed the strongest responses to nutrient additions: BP increased in response to N, P, and their interaction, BR increased in response to N and the interaction between N and P, and BGE was negatively affected, mainly by the interaction between N and P additions. Lagoons with the highest DOC concentrations showed almost no significant relationship with nutrient additions. Taken together, these results show that different environmental drivers impact bacterial processes at different scales. Changes of bacterial metabolism related to the increase of water temperature are consistent between lagoons, therefore their consequences can be predicted at a regional scale, while the effect of nutrient inputs is specific to different lagoons but seems to be related to the DOC concentration.

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Origin, concentration, availability and fate of dissolved organic carbon in coastal lagoons of the Rio de Janeiro State

by André Amado, Frederico Meirelles-pereira, and Saulo Jacques

Acta Limnologica Brasiliensia, 2013

The coastal lagoons in the northern Rio de Janeiro State (Brazil) present a wide gradient of diss... more The coastal lagoons in the northern Rio de Janeiro State (Brazil) present a wide gradient of dissolved organic carbon (DOC) and water color, with the highest DOC concentrations reported in the literature for aquatic ecosystems. Thus, they represent a peculiar set of ecosystems for the study of the origin, processing and fate of DOC in inland waters. We reviewed data from 2 decades of studies on the carbon cycle in these coastal lagoons and discussed the fluctuations in the concentration and quality of DOC, factors affecting DOC microbial and photochemical degradation, CO 2 emission, as well as the role of humic and non-humic carbon to the energy flow through the trophic chains. We show that DOC quality, not its quantity, determines the rates of photochemical and microbial degradation both seasonally (within system) and spatially (among systems), with the exception of DOC photo-oxidation among lagoons, which is partially explained by DOC concentration at regional scale. In humic lagoons, there is a fairly predictable pattern of seasonal variation in DOC concentration associated to rainfall-induced inputs of allochthonous C. However, little is known about the exact timing of these allochthonous inputs and how they relate to the seasonal variation of DOC chemical properties (i.e. its quality). Depth-integrated photo-oxidation rates were less representative in highly humic lagoons, due to strong light attenuation in the water column. Nevertheless, the potential contribution of photo-oxidation and bacterial respiration to total CO 2 efflux (~11%) did not differ significantly when all lagoons were pooled together. Contrary to prevailing paradigms for humic waters, microalgae seem to be the main C source in humic lagoons, sustaining pelagic food webs through zooplankton, in spite of some contribution of allochthonous C. Thus, the predominant role of the microbial loop in the DOC recovery to food webs in such systems is to be questioned.

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The LAIA Database A Secure and Decentralized Platform for Environmental Data

Lana, 2019

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As Pesquisas Sem Relevância e o Interesse Público

by Saulo Jacques and S. Jacques

Lana, 2019

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Potential changes in bacterial metabolism associated with increased water temperature and nutrient inputs in tropical humic lagoons

by Saulo Jacques and Jean Remy Daveé Guimarães

Frontiers in Microbiology, 2015

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