Possible pathways for balancing CO2 emissions and sinks as agreed in Paris COP21 [Posibles escenarios energéticos con vistas al cumplimiento del Acuerdo de París]

Peñuelas, J., Sardans, J., Walsh, B., Ciais, P., Janssens, I.A., Riahi, K., Rydzak, F., Van Vuuren, D., Obersteiner, M. (2017) Possible pathways for balancing CO2 emissions and sinks as agreed in Paris COP21 [Posibles escenarios energéticos con vistas al cumplimiento del Acuerdo de París]. Ecosistemas. 26: 103-105.
Enlace
Doi: 10.7818/ECOS.2017.26-3.12

Resumen:

Changes in nutrient concentrations of leaves and roots in response to global change factors

Sardans J., Grau O., Chen H.Y.H., Janssens I.A., Ciais P., Piao S., Peñuelas J. (2017) Changes in nutrient concentrations of leaves and roots in response to global change factors. Global Change Biology. 23: 3849-3856.
Enlace
Doi: 10.1111/gcb.13721

Resumen:

Global change impacts on biogeochemical cycles have been widely studied, but our understanding of whether the responses of plant elemental composition to global change drivers differ between above- and belowground plant organs remains incomplete. We conducted a meta-analysis of 201 reports including 1,687 observations of studies that have analyzed simultaneously N and P concentrations changes in leaves and roots in the same plants in response to drought, elevated [CO2], and N and P fertilization around the world, and contrasted the results within those obtained with a general database (838 reports and 14,772 observations) that analyzed the changes in N and P concentrations in leaves and/or roots of plants submitted to the commented global change drivers. At global level, elevated [CO2] decreased N concentrations in leaves and roots and decreased N:P ratio in roots but no in leaves, but was not related to P concentration changes. However, the response differed among vegetation types. In temperate forests, elevated [CO2] was related with lower N concentrations in leaves but not in roots, whereas in crops, the contrary patterns were observed. Elevated [CO2] decreased N concentrations in leaves and roots in tundra plants, whereas not clear relationships were observed in temperate grasslands. However, when elevated [CO2] and N fertilization coincided, leaves had lower N concentrations, whereas root had higher N concentrations suggesting that more nutrients will be allocated to roots to improve uptake of the soil resources not directly provided by the global change drivers. N fertilization and drought increased foliar and root N concentrations while the effects on P concentrations were less clear. The changes in N and P allocation to leaves and root, especially those occurring in opposite direction between them have the capacity to differentially affect above- and belowground ecosystem functions, such as litter mineralization and above- and belowground food webs. © 2017 John Wiley & Sons Ltd

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Plant community composition affects the species biogeochemical niche

Urbina, I., Sardans, J., Grau, O., Beierkuhnlein, C., Jentsch, A., Kreyling, J., Peñuelas, J. (2017) Plant community composition affects the species biogeochemical niche. Ecosphere. 8: 0-0.
Enlace
Doi: 10.1002/ecs2.1801

Resumen:

INDUSTRIAL AND AGRICULTURAL WASTES DECREASED GREENHOUSE-GAS EMISSIONS AND INCREASED RICE GRAIN YIELD IN A SUBTROPICAL PADDY FIELD

WANG, W., ZENG, C., SARDANS, J., ZENG, D., WANG, C., BARTRONS, M., PEÑUELAS, J. (2017) INDUSTRIAL AND AGRICULTURAL WASTES DECREASED GREENHOUSE-GAS EMISSIONS AND INCREASED RICE GRAIN YIELD IN A SUBTROPICAL PADDY FIELD. Experimental Agriculture. : 1-18.
Enlace
Doi: 10.1017/S001447971700031X

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Factors related with CH<inf>4</inf> and N<inf>2</inf>O emissions from a paddy field: Clues for management implications

Wang, C., Lai, D.Y.F., Sardans, J., Wang, W., Zeng, C., Peñuelas, J. (2017) Factors related with CH4 and N2O emissions from a paddy field: Clues for management implications. PLoS ONE. 12: 0-0.
Enlace
Doi: 10.1371/journal.pone.0169254

Resumen:

Global forest carbon uptake due to nitrogen and phosphorus deposition from 1850 to 2100

Wang, R., Goll, D., Balkanski, Y., Hauglustaine, D., Boucher, O., Ciais, P., Janssens, I., Penuelas, J., Guenet, B., Sardans, J., Bopp, L., Vuichard, N., Zhou, F., Li, B., Piao, S., Peng, S., Huang, Y., Tao, S. (2017) Global forest carbon uptake due to nitrogen and phosphorus deposition from 1850 to 2100. Global Change Biology. : 0-0.
Enlace
Doi: 10.1111/gcb.13766

Resumen:

Straw application strategy to optimize nutrient release in a southeastern China rice cropland

Wang, W., Sardans, J., Wang, C., Pan, T., Zeng, C., Lai, D.Y.F., Bartrons, M., Peñuelas, J. (2017) Straw application strategy to optimize nutrient release in a southeastern China rice cropland. Agronomy. 7: 0-0.
Enlace
Doi: 10.3390/agronomy7040084

Resumen:

Relationships between the potential production of the greenhouse gases CO<inf>2</inf>, CH<inf>4</inf> and N<inf>2</inf>O and soil concentrations of C, N and P across 26 paddy fields in southeastern China

Wang, W., Sardans, J., Wang, C., Zeng, C., Tong, C., Asensio, D., Peñuelas, J. (2017) Relationships between the potential production of the greenhouse gases CO2, CH4 and N2O and soil concentrations of C, N and P across 26 paddy fields in southeastern China. Atmospheric Environment. : 0-0.
Enlace
Doi: 10.1016/j.atmosenv.2017.06.023

Resumen:

Experimental and observational studies find contrasting responses of soil nutrients to climate change

Yuan, Z.Y., Jiao, F., Shi, X.R., Sardans, J., Maestre, F.T., Delgado-Baquerizo, M., Reich, P.B., Peñuelas, J. (2017) Experimental and observational studies find contrasting responses of soil nutrients to climate change. eLife. 6: 0-0.
Enlace
Doi: 10.7554/eLife.23255

Resumen:

Trends in soil solution dissolved organic carbon (DOC) concentrations across European forests

Camino-Serrano M., Graf Pannatier E., Vicca S., Luyssaert S., Jonard M., Ciais P., Guenet B., Gielen B., Peñuelas J., Sardans J., Waldner P., Etzold S., Cecchini G., Clarke N., Galić Z., Gandois L., Hansen K., Johnson J., Klinck U., Lachmanová Z., Lindroos A.J., Meesenburg H., Nieminen T.M., Sanders T.G.M., Sawicka K., Seidling W., Thimonier A., Vanguelova E., Verstraeten A., Vesterdal L., Janssens I.A. (2016) Trends in soil solution dissolved organic carbon (DOC) concentrations across European forests. Biogeosciences Discussions. 2016: 0-0.
Enlace
Doi: 10.5194/bg-2015-632

Resumen:

Dissolved organic carbon (DOC) in soil solution is connected to DOC in surface waters through hydrological flows. Therefore, it is expected that long-term dynamics of DOC in surface waters reflect DOC trends in soil solution. However, a multitude of site-studies has failed so far to establish consistent trends in soil solution DOC, whereas increasing concentrations in European surface waters over the past decades appear to be the norm, possibly as a result from acidification recovery. The objectives of this study were therefore to understand the long-term trends of soil solution DOC from a large number of European forests (ICP Forests Level II plots) and determine their main physico-chemical and biological controls. We applied trend analys is at two levels: 1) to the entire European dataset and 2) to the individual time series and related trends with plot characteristics, i.e., soil and vegetation properties, soil solution chemistry and atmospheric deposition loads. Analyses of the entire dataset showed an overall increasing trend in DOC concentrations in the organic layers, but, at individual plots and depths, there was no clear overall trend in soil solution DOC across Europe with temporal slopes of soil solution DOC ranging between -16.8% yr-1 and +23% yr-1 (median= +0.4% yr-1). The non-significant trends (40%) outnumbered the increasing (35%) and decreasing trends (25%) across the 97 ICP Forests Level II sites. By means of multivariate statistics, we found increasing DOC concentrations with increasing mean nitrate (NO3 -) deposition and decreasing DOC concentrations with decreasing mean sulphate (SO4 2-) deposition, with the magnitude of these relationships depending on plot deposition history. While the attribution of increasing trends in DOC to the reduction of SO4 2- deposition could be confirmed in N-poorer forests, in agreement with observations in surface waters, this was not the case in N-richer forests. In conclusion, long-term trends of soil solution DOC reflected the interactions between controls acting at local (soil and vegetation properties) and regional (atmospheric deposition of SO4 2- and inorganic N) scales. © Author(s) 2016.

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