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Soil organic carbon stocks in native forest of Argentina:a useful surrogate for mitigation and conservation planning under climate variability

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Ecological Processes 2024年第1期13卷 3-24页

作者： Pablo L.Peri Juan Gaitán matías Mastr.n.elo marcelo nosetto Pablo E.Villagra Ezequiel Balducci martín Pinazo roxana P.Eclesia Alejandra Von Wallis Sebastián Villar.n. Fr.n.isco Alaggia Mar.n. gon.ález Polo Silvina Manrique Pablo A.Meglioli Julián rodríguez-Souilla martín Mónaco Jimena E.Chaves Ariel Medina Ignacio Gasparri Eugenio Alvarez Arnesi mar.a Paula Barral Axel von Müller.n.rberto M.Pahr Josefina Uribe Echevarria Pedro Fernández Mar.n. Morsucci Dardo López Juan Manuel Cellini Leandro Alvarez Ignacio Barberis Hernán Colomb Ludmila La Manna Sebastián Barbaro Cecilia Blundo Ximena Sirimarco Laura Cavallero Gualberto Zalazar Guillermo martínez Pastur Instituto nacional de tecnología Agropecuaria (IntA) Universidad nacional de la Patagon.a Austral (UnPA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Universidad nacional de Luján Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Grupo de Estudio de Agroecosistemas y Paisajes rurales (GEAP) Universidad Nacional de Mar del Plata Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET ) CCt San Luis Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto Argentino de nivología Glaciología y Ciencias Ambientales (IANIGLA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Universidad Nacional de Cuyo Instituto de Investigaciones en Biodiversidad y Medioambiente (InIBIOMA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto de Investigaciones en Energía no Convencional CCT Salta-JujuyConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Laboratorio de recursos Agroforestales Centro Austral de Investigaciones Científicas (CADIC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Dirección nacional de Bosques Ministerio de Ambiente y Desarrollo Sostenible de la Nación Instituto de Ecología regional Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )Universidad Nacional de Tucumán Universidad nacional de rosario Instituto de Investigaciones en Ciencias Agrarias de Rosario Centro Científico Tecnológico CONICET Grupo de Estudio de Agroecosistemas y Paisajes rurales (GEAP) Universidad Nacional de Mar del Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Laboratorio de Investigaciones en Maderas (LIMAD) Universidad Nacional de La Plata (UNLP) Administración de Parques nacionales (APn) Parque Nacional Los Alerces Centro de Estudios Ambientales Integrados (CEAI) Universidad Nacional de la Patagonia San Juan Bosco (UNPASJB) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )

Background the nationally determined contribution（nDC） presented by Argentina within the framework of the Paris Agreement is aligned with the decisions made in the context of the United nations Framework Conven-tion on Climate Change（UnFCCC） on the reduction of emissions derived from deforestation and forest degradation, as well as forest carbon conservation（rEDD+）. In addition, climate change constitutes one of the greatest threats to forest biodiversity and ecosystem services. However, the soil organic carbon（SOC） stocks of native forests have not been incorporated into the Forest refer.n.e Emission Levels calculations and for conservation planning under cli-mate variability due to a lack of information. the objectives of this study were:（i） to model SOC stocks to 30 cm of native forests at a national scale using climatic, topographic and vegetation as predictor variables, and（ii） to relate SOC stocks with spatial–temporal remotely sensed indices to determine biodiversity conservation concerns due to threats from high inter-annual climate *** We used 1040 forest soil samples（0–30 cm） to generate spatially explicit estimates of SOC native forests in Argentina at a spatial resolution of approximately 200 m. We selected 52 potential predictive envir.n.ental covari-ates, which represent key factors for the spatial distribution of SOC. All covariate maps were uploaded to the Google Earth Engine cloud-based computing platform for subsequent modelling. to determine the biodiversity threats from high inter-annual climate variability, we employed the spatial–temporal satellite-derived indices based on Enhanced Vegetation Index（EVI） and land surface temperature（LSt） images from Landsat *** SOC model（0–30 cm depth） prediction accounted for 69% of the variation of this soil property across the whole native forest coverage in Argentina. total mean SOC stock reached 2.81 Pg C（2.71–2.84 Pg C with a probability of 90%） for a total area of 460,790 km2,

关键词： Soil organic carbon Biodiversity native forest Climate change mitigation Modelling resilience

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Involvement of parathyroid hormone-related peptide in the aggressive phenotype of colorectal cancer cells

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World Journal of Gastroenterology 2021年第41期27卷 7025-7040页

作者： mar.a Belén novoa Díaz Pedro matías Carriere mar.a Julia martín natalia Calvo Claudia Gentili Departamento de Biología Bioquímica y FarmaciaUniversidad Nacional del Sur(UNS)-INBIOSUR(CONICET-UNS)Bahía Blanca 8000Buenos AiresArgentina Departamento de Química Universidad Nacional del Sur(UNS)-INQUISUR(CONICET-UNS)Bahía Blanca 8000Buenos AiresArgentina

Colorectal cancer(CrC)remains one of the leading causes of mortality from malignant diseases *** general terms,CrC presents high heterogeneity due to the influence of differ.n. genetic and envir.n.ental factors;also,the neoplastic cells are str.n.ly influenced by the extracellular matrix and several surrounding cells,known together as the tumor microenvir.n.ent(tME).Bidirectional communication takes place between the tumor and the tME through the release of autocr.n. and paracr.n. *** hormone-related peptide(PtHrP)is a cytokine secreted by a wide variety of tissues and is able to regulate several cellular functions both in physiological as well as in pathological *** exerts its effects as a paracr.n./autocr.n. factor,although its mode of action is mainly *** has been shown that this peptide is expressed by several tumors and that the tumor secretion of PtHrP is responsible for the malignant humoral *** years ago,when our research group started studying PtHrP effects in the experimental models derived from intestinal tumors,the literature available at the time addressing the effects of PtHrP on colorectal tumors was limited,and no articles had been published regarding to the paracr.n. action of PtHrP in CrC *** on this and on our previous findings regarding the role of PtH in CrC cells,our purpose in recent years has been to explore the role of PtHrP in *** analyzed the behavior of CrC cells treated with exogenous PtHrP,focalizing in the study of the following events:Survival,cell cycle progression and proliferation,migration,chemoresistance,tumor-associated angiogenesis,epithelial to mesenchymal tr.n.ition program and other events also associated with invasion,such us the induction of cancer stem cells *** work summarizes the major findings obtained by our investigation group using in vitro and in vivo CrC models that evidence the participation of PtHrP in the acquisition of an aggressiv

关键词： Parathyroid hormone-related protein Colorectal cancer tumor biomarkers neoplastic processes Drug resistance tumor microenvir.n.ent

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Hematotesticular barrier is altered from early stages of liver cirrhosis:Effect of insulin-like growth factor 1

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World Journal of Gastroenterology 2004年第17期10卷 2529-2534页

作者： Inma Castilla-Cortázar.n.eves Diez mar.a García-Fernández Juan Enrique Puche Fernando Diez-Caballero Jorge Quiroga matías Díaz-Sánchez Alberto Castilla Amelia Díaz Casares Isabel Varela-nieto Jesǘs Prieto Salvador gon.ález-Barón Department of Human Physiology University of NavarraPamplonaNavarraSpain Department of Human physiologySchool of MedicineUniversity of MlagaMalagaSpain Department of Human Physiology University of NavarraPamplonaNavarraSpain Department of Human Physiology School of MedicineUniversity of MálagaMalagaSpain Instituto de Investigaciones Biomédicas "Alberto Sols" Consejo Superior de Investigaciones CientificasUniversidad Autónoma de Madrid (CSIC-UAM)MadridSpain Supported by the Spanish Program I+DSAF 99/0072 and SAF 2001/1672 Department of Internal Medicine Hospital SierrallanaTollelavega and School of MedicineUniversity of the Basque Country-Vitoria-GasteizSpain Instituto de Investigaciones Biomedicas"Alberto Sols"Consejo Superior de Investigaciones Cientificas Universidad Autonoma de Madrid(CSIC-UAM) MadridSpain Department of Internal Medicine Liver Unit University of navarra PamplonaNavarraSpain

AIM:the pathogenesis of hypogon.dism in liver cirrhosis is not well *** results from our laboratory showed that IGF-1 deficiency might play a pathogenetic role in hypogon.dism of *** administration of IGF-1 for a short period of time reverted the testicular atrophy associated with advanced experimental cirrhosis. the aim of this study was to establish the historical progression of the described alterations in the testes, explore testicular morphology,histopathology,cellular proliferation,integrity of testicular barrier and hypophyso- gon.dal axis in rats with no ascitic cirrhosis. MEtHODS:Male Wistar rats with histologically-proven cirrhosis induced with carbon tetrachloride(CCI_4)for 11 wk, were allocated into two groups(n=12,each)to receive recombinant IGF-1(2 μg/100 gd,sc)for two weeks or *** rats receiving vehicle were used as control group(n=12). rESULtS:Compared to controls,rats with compensated cirrhosis showed a normal testicular size and weight and very few histopathological testicular abnormalities. However,these animals showed a significant diminution of cellular proliferation and a reduction of testicular tr.n.ferr.n.*** addition,pituitary-gon.dal axis was altered,with significant higher levels of FSH(Pntrols)and increased levels of LH in untreated cirrhotic ***,IGF-1 treatment normalized testicular tr.n.ferr.n.expression and cellular proliferation and reduced serum levels of LH(P=ns vs controls,and Pntreated cirrhotic group). COnCLUSIOn:the testicular barrier is altered from an early stage of cirrhosis,shown by a reduction of tr.n.ferr.n.expression in Sertoli cells,a diminished cellular proliferation and an altered gon.dal *** treatment with IGF-1 could be also useful in this initial stage of testicular disorder associated with compensated cirrhosis.

关键词： Animals Atrophy Carbon tetrachloride Estrogens Follicle Stimulating Hormone Hypogon.dism Insulin-Like Growth Factor I Liver Cirrhosis Luteinizing Hormone Male Pituitary Gland rats rats, Wistar research Support, non-U.S. Gov't Sertoli Cells testis testoster.n. tr.n.ferrin

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Interaction between Estuar.n. Microphytobenthos and Physical Forcings: the role of Atmospheric and Sedimentary Factors

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International Journal of Geosciences 2013年第2期4卷 352-361页

作者： Jer.n.mo Pan Constanza n. Bournod Diana G. Cuadrado Alejandro Vitale mar.a Cintia Piccolo Consejo nacional de Investigaciones Científicas y técnicas (COnICEt) Argentina Instituto Argentino de Oceanografía (IADO) Bahía Blanca Argentina Consejo nacional de Investigaciones Científicas y técnicas (COnICEt) Argentina Instituto Argentino de Oceanografía (IADO) Bahía Blanca Argentina Universidad nacional del Sur Bahía Blanca Argentina Estación Costera J. J. nágera Departamento de Ciencias Marinas Universidad Nacional de Mar del Plata Mar del Plata Argentina Consejo nacional de Investigaciones Científicas y técnicas (COnICEt) Argentina

the goal of this study was to analyze microbial mats and biofilms from the lower supratidal area of the Bahía Blanca estuary (Argentina), and explore their relationship with sediments and other physical forcings. thirteen monthly sediment samples (uppermost 10 mm) were taken and their composition and abundance in microorganisms was determined by microscopy. Physical parameters (solar radiation and sediment temperature at -5 cm) were recorded with a frequency of 5 minutes by a coastal envir.n.ental monitor.n. station. Additionally, sediment grain size and moisture content were determined for distinct layers in the uppermost20 mm, and the rate of inundation of the supratidal area was estimated from tidal gauge measurements. there were significant seasonal differ.n.es in the biomass of the microphytobenthic groups considered (filamentous cyanobacteria and epipelic diatoms), with the former consistently making up >70% of the total biomass. the relationships between microphytobenthos and sediment temperature and solar radiation fitted to linear regressions, and consistently showed an inverse relationship between microphytobenthic abundance and either one of the physical parameters. the gr.n.lometric analysis revealed a unimodal composition of muddy sediments, which were vertically and spatially homogeneous;additionally, there were significant seasonal differ.n.es in water content loss with drying conditions prevailing in the summer. Several Microbially-Induced Sedimentary Structures (MISS) were identified in the supratidal zone such as shr.n.age cracks, erosional pockets, gas domes, photosynthetic domes, mat chips and sieve-like surfaces. In contrast to studies from analogous envir.n.ents in the northern Hemisphere, we found reduced microphytobenthic biomass in summer, which were explained by increased evaporation/desiccation rates as a consequence of increased radiation, despite frequent tidal inundation. In conclusion, the observed density shifts in the benthic microbi

关键词： Biofilms Microbial mats tidal Flat Solar radiation Sediment Grain Size

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