36 research outputs found
N values in southern Patagonia's semiarid rangelands
No full textNitrogen (N) cycling in rangeland soils could potentially be controlled by water supply, stocking rates, or a range of other variables, such as ecosystem N stocks. To gauge the relative importance and elucidate possible interactions among these factors, we
measured many abiotic variables to identify first-order controls of δ15N for Patagonia’s rangeland soils under contrasting historical grazing intensities. The results showed that δ15N values declined as water availability increased. The effects of precipitation and stocking rate on soil δ15N values were additive, and the effect of precipitation far outweighed the effects of grazing pressure. The soil N stock was a weak predictive variable for modeling variation in δ15N of the soil. Earlier assumptions about an inflection point for N cycling and δ15N values related to aridity were not confirmed. We conclude that variation in water availability drives variation in δ15N
values irrespective of grazing intensity. We also conclude that meaningful interpretation of δ15N in soil will require a better mechanistic understanding of the interactions between water and N in the vadose zone than we currently possess.EEA Santa CruzFil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina.Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Duarte Guardia, Sandra. Universidad Nacional de la Patagonia Austral; Argentina.Fil: Duarte Guardia, Sandra. Instituto Nacional de Innovación Agraria (INIA). Laboratorio Nacional de Suelos, Aguas y Foliares-LABSAF; Perú.Fil: Amelung, Wulf. University of Bonn. Institute of Crop Science and Resource Conservation (INRES). Soil Science and Soil Ecology; AlemaniaFil: Ladd, Brenton. Universidad Científica del Sur. Escuela de Agroforestería; Perú
Biophysical and socioeconomic factors influencing soil carbon stocks: a global assessment. Appendix S1: Raw Dataset [Conjunto de datos]
No full textSupplementary information of the: Duarte-Guardia, S., Peri, P., Amelung, W. et al. Biophysical and socioeconomic factors influencing soil carbon stocks: a global assessment. Mitig Adapt Strateg Glob Change 25, 1129–1148 (2020).EEA Santa CruzFil: Duarte Guardia, Sandra. Universidad Nacional de la Patagonia Austral; Argentina.Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral (UNPA). Santa Cruz; Argentina.Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina.Fil: Amelung, Wulf. University of Bonn. Soil Science and Soil Ecology. Institute of Crop Science and Resource Conservation (INRES). Bonn; Alemania.Fil: Thomas, Evert. Bioversity International. Lima; Perú.Fil: Borchard, Nils. Natural Resources Institute Finland (Luke). Plant Production. Helsinki; Finlandia.Fil: Baldi, Germán. Universidad Nacional de San Luis. Instituto de Matemática Aplicada. San Luis; Argentina.Fil: Baldi, Germán. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). San Luis; Argentina.Fil: Cowie, Annette L. NSW Department of Primary Industries. Armidale. NSW; Australia.Fil: Cowie, Annette L. University of New England. School of Environmental and Rural Science. Armidale. NSW; Australia.Fil: Ladd, Brenton. Universidad Científica del Sur. Escuela de Agroforestería. Lima; Perú
The relative importance of soil properties and regional climate as drivers of productivity in southern Patagonia’s Nothofagus antarctica forests
No full textKey message: Soil texture and temperature-related variables were the variables that most contributed toNothofagus antarcticaforest height in southern Patagonia. This information may be useful for improving forest management, for instance related to the establishment of silvopastoral systems or selection of suitable sites for forest reforestation in southern Patagonia. Context: Changes in forest productivity result from a combination of climate, topography, and soil properties. Aims: The relative importance of edaphic and climatic variables as drivers of productivity in Nothofagus antarctica forests of southern Patagonia, Argentina, was evaluated. Methods: A total of 48 mature stands of N. antarctica were selected. For each study site, we measured the height of three mature dominant trees, as an indicator of productivity. Seven soil, five spatial, and 19 climatic features were determined and related to forest productivity. Through partial least squares regression analyses, we obtained a model that was an effective predictor of height of mature dominant trees in the regional data set presented here. Results: The four variables that most contributed to the predictive power of the model were altitude, temperature annual range, soil texture, and temperature seasonality. Conclusion: The information gathered in this study suggested that the incidence of the soil and temperature-related variables on the height of dominant trees, at the regionally evaluated scale, was higher than the effect of water-related variables.Fil: Bahamonde, Héctor Alejandro. Universidad Nacional de la Patagonia Austral; Argentina. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Martínez Pastur, Guillermo José. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Soler Esteban, Rosina Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Rosas, Yamina Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Ladd, Brenton. Universidad Cientifica del Sur; Perú. University of New South Wales; AustraliaFil: Guardia, Sandra Duarte. Universidad Cientifica del Sur; PerúFil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Soils need to be considered when assessing the impacts of land-use change on carbon sequestration
No full text201
Biophysical and socioeconomic factors influencing soil carbon stocks: a global assessment
No full text202
A Mídia no trecho: um estudo de recepção junto a trecheiros albergados em Florianópolis
No full textTCC (graduação) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Curso de Jornalismo.Os #trecheiros# são indivíduos que apresentam um alto grau de nomadismo, migrando entre cidades com bastante frequência e constituindo-se como parte da chamada #população de rua#. Esta pesquisa realiza um estudo da recepção das notícias veiculadas pela imprensa junto a tais indivíduos na cidade. Para tal, são utilizadas as técnicas da pesquisa de campo características da etnografia urbana, além de um aprofundamento teórico sobre os temas tratados no estudo e da área dos Estudos de Recepção
Vestígios da cultura popular em Angela Lago: conto recontado é segredo revelado
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-graduação em LiteraturaA presente dissertação elabora, sob o domínio da cultura popular, e configura, sob o viés do conto popular recontado, a leitura de algumas obras da escritora brasileira para crianças, Angela Lago. Pretende-se, em primeiro lugar, identificar nos recontos da escritora, a persistência dos modelos narrativos que a tradição popular de cunho escrito manteve vivo; em segundo, verificar se nesses recontos as narrativas assumiram modelos diferenciados dos tradicionais da cultura popular. Na seqüência, busca-se comprovar a presença de forças que ora aproximam, ora afastam os textos do fundo comum da tradição e constatar o modo particular do reconto de Angela Lago
Vozes do Carandiru: o rap de cárcere e os estigmas sociais
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Literatura, Florianópolis, 2015.A presente dissertação busca apresentar o rap produzido no cárcere como literatura de cárcere, oral e performática a partir de dois grupos de rap procedentes do Complexo Carcerário do Carandiru, a maior prisão da América Latina, extinta em 2002. Os grupos surgiram entre os anos de 1996 e 1999, a saber, ?Detentos do Rap? ou ?DTS? e ?509-E?, respectivamente. Pelo que se percebeu durante a pesquisa, o rap carcerário ainda não havia sido incluso na categoria das literaturas de cárceres do país, que tem como principal expoente o livro de Graciliano Ramos ?Memórias do cárcere?, mas também os testemunhos surgidos após o massacre ocorrido no Carandiru em 1992, que fez com que diversos autores escrevessem sobre este ambiente. No entanto, sendo a prosa ainda predominante é importante que o rap como uma lírica contemporânea possa complementar esse rol literário. Através da junção de conceitos que perpassam pela dialética da marginalidade; pelas sociologias das ausências e das emergências; pela literatura como inscrição do eu; pelo realismo afetivo e pelas performances poético-musicais pretendeu-se delinear uma estética de sobrevivência na qual os sujeitos, aqui duplamente marginalizados pela sociedade conforme se constatou, apresentem e se representem através das poesias selecionadas. Seus estigmas de presidiários e o caráter de exclusão foram potencializados positivamente em suas vidas através do lirismo poético e ácido destas poesias de violência. Tais poesias, a partir daí surgem como uma tentativa de fuga desses sujeitos encarcerados no sentido de buscar uma redenção para si através das palavras, além de falar pela corporeidade representada nas performances audiovisuais cujo cenário cruel e histórico é o próprio Carandiru. A política da memória fez-se, neste trabalho, aprisionada pela linguagem poética de resistência para dar visibilidade a um universo sombrio e apontar que a literatura parece ainda, em meio ao caos estabelecido, tocar as subjetividades de diferentes formas. Percebeu-se que tais perspectivas de leitura só são possíveis através dos estudos culturais que procuram aproximar a literatura e a performance na contemporaneidade para dar voz aos diferentes entrelaçamentos que se fazem presentes nestas formas de artes.Abstract : This work aims to present the rap produced in prison as a prison literature, oral and performative from two rap groups coming from Prison Complex of Carandiru, the largest prison in Latin America extinct in 2002. The groups have emerged between the years 1996 and 2000, namely "Detentos do Rap" or "DTS" and "509-E" respectively. From what we saw during the search, the prison rap had not been included in the category of the country's prison literature, whose main exponent is the book by Graciliano Ramos ?Memórias do Cárcere?, but also the evidence arising after the massacre occurred in Carandiru in 1992 meant that many authors write about this environment. However, with the still predominant prose is important that the rap as a contemporary lyric can complement this literary list. By combining concepts that underlie the dialectic of marginality; the sociology of absences and emergencies; the literature as description of the self; the affective realism and the poetic-musical performances intended to outline a survival aesthetic in which subjects, here doubly marginalized by society as it was found, present and represent through selected poems. Its stigmata of prisoners and the exclusion of character were boosted positively in their lives through the poetic lyricism and poetry of these acid violence. Such poetry from then appear as an attempt to escape these individuals incarcerated in order to seek redemption for themselves through words, and speak for the embodiment represented in audiovisual performances whose cruel scenery and history is the Carandiru itself. The politics of memory was made, in this work, imprisoned by the poetic language of resistance to give visibility to a dark universe and point out that the literature still seems to be in the chaos set to touch subjectivities in different ways. It was felt that such reading prospects are only possible through cultural studies looking approach to literature and performance in contemporary times to allow different twists that are present in these forms of arts
Biophysical and socioeconomic factors influencing soil carbon stocks: a global assessment
No full textSoil is the most important terrestrial carbon (C) reservoir but is greatly impacted by land use change (LUC). Previous analyses of LUC impacts on soil C have focused on biophysical variables, leaving aside the influence of socioeconomics. The aim of our study was to determine global soil organic carbon (SOC) change patterns after LUC and to assess the impacts of both biophysical and socioeconomic factors that influence stocks of SOC after LUC simultaneously. This was done at a global scale using 817 sites from 99 peer-reviewed publications. We performed separate analyses for cases in which there were gains and losses of SOC. The best predictors of SOC stock changes were the type of LUC and predictors related to sampling depth, climate, biome, soil order, relief, geology, years since LUC, and primary productivity. However, also, socioeconomic variables such as indices of poverty, population growth, and levels of corruption were important. They explained 33% of the variability in SOC on their own and helped improve model accuracy from 42 to 53% when considered in combination with biophysical variables. SOC losses were highly correlated to the type of LUC and social variables, while SOC gains correlated most strongly with years since LUC and the biophysical variables. The analyses confirm that one of the biggest drivers of SOC loss is conversion to agroindustrial scale cropping, whereas with regard to the recuperation of SOC after LUC, the factor "time since conversion" emerged as the most important predictive variable, which must be better integrated in respective policy expectations. We conclude that policies should more than ever incentivize holistic approaches that prevent additional loss of native SOC, while at the same time promoting sustainable intensification of existing agricultural regions. Finally future investments on LUC to regain SOC should be aligned with efforts to alleviate poverty and corruption for their potential to achieve mutual gains in soil fertility and socio-economic parameters
