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2. Microbial competition for phosphorus limits the CO2 response of a mature forest

Author

Jiang, Mingkai, Crous, Kristine Y., Carrillo, Yolima, Macdonald, Catriona A., Anderson, Ian C., Boer, Matthias M., Farrell, Mark, Gherlenda, Andrew N., Castañeda-Gómez, Laura, Hasegawa, Shun, Jarosch, Klaus, Milham, Paul J., Ochoa-Hueso, Rául, Pathare, Varsha, Pihlblad, Johanna, Piñeiro, Juan, Powell, Jeff R., Power, Sally A., Reich, Peter B., Riegler, Markus, Zaehle, Sönke, Smith, Benjamin, Medlyn, Belinda E., and Ellsworth, David S.

Published
2024
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4. Mathematical Problem-Solving in Two Teachers' Knowledge Models: A Critical Analysis

Author

Piñeiro, Juan Luis, Castro-Rodríguez, Elena, and Castro, Enrique

Abstract

Two of the teachers' knowledge models most widely used in the literature are the Mathematical Knowledge for Teaching (MKT) and the Knowledge Quartet (KQ). We develop an analysis of the limitations of the knowledge required for teaching problem-solving published during 1990-2018 which includes these models. This analysis revealed that MKT takes neither the nature of the process nor the knowledge accumulated by problem-solving research into consideration. While the KQ issubject to similar omissions, its major drawback is element overlap. We conclude that the knowledge required to teach problem-solving is not clearly envisaged in the theoretical teachers' knowledge models analysed.

Published
2021

8. ¿CÓMO ATIENDEN, INTERPRETAN Y DECIDEN FUTURAS MAESTRAS AL INTERACTUAR CON EL PENSAMIENTO ALGEBRAICO DE NIÑAS? EL CASO DE LAS IGUALDADES NUMÉRICAS.

Author

Pinto, Eder, Luis Piñeiro, Juan, Cortés, Camila, and Martínez Videla, Mariya Victoria

Subjects
*PRIMARY school teachers, *ELEMENTARY school teachers, *DECISION making, *TEACHERS, *PROFESSIONAL employees
Abstract

In this research, we explore how a group of 21 future primary school teachers attend to, interpret, and make decisions based on the algebraic thinking demonstrated by girls when solving numerical equalities. We adopt the conceptual perspectives of Noticing and MTSK to deepen the participants' professional knowledge. The future teachers participated in a course on teaching and learning school algebra, which followed a video analysis methodology. The main results show that the participants consider the algebraic elements involved in the situation, although the use of evidence is limited. Additionally, we highlight the mobilization of various mathematical knowledge for teaching school algebra. [ABSTRACT FROM AUTHOR]

Published
2024
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18. The fate of carbon in a mature forest under carbon dioxide enrichment

Author

Jiang, Mingkai, Medlyn, Belinda E., Drake, John E., Duursma, Remko A., Anderson, Ian C., Barton, Craig V. M., Boer, Matthias M., Carrillo, Yolima, Castañeda-Gómez, Laura, Collins, Luke, Crous, Kristine Y., De Kauwe, Martin G., dos Santos, Bruna M., Emmerson, Kathryn M., Facey, Sarah L., Gherlenda, Andrew N., Gimeno, Teresa E., Hasegawa, Shun, Johnson, Scott N., Kännaste, Astrid, Macdonald, Catriona A., Mahmud, Kashif, Moore, Ben D., Nazaries, Loïc, Neilson, Elizabeth H. J., Nielsen, Uffe N., Niinemets, Ülo, Noh, Nam Jin, Ochoa-Hueso, Raúl, Pathare, Varsha S., Pendall, Elise, Pihlblad, Johanna, Piñeiro, Juan, Powell, Jeff R., Power, Sally A., Reich, Peter B., Renchon, Alexandre A., Riegler, Markus, Rinnan, Riikka, Rymer, Paul D., Salomón, Roberto L., Singh, Brajesh K., Smith, Benjamin, Tjoelker, Mark G., Walker, Jennifer K. M., Wujeska-Klause, Agnieszka, Yang, Jinyan, Zaehle, Sönke, and Ellsworth, David S.

Published
2020
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21. Litter and soil biodiversity jointly drive ecosystem functions

Author

National Natural Science Foundation of China, China Postdoctoral Science Foundation, Yunnan Provincial Academy of Science and Technology, Alexander von Humboldt Foundation, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), European Agricultural Fund for Rural Development, European Association of Innovation, Australian Research Council, European Commission, Liu, Shengen [0000-0002-4730-5202], Plaza de Carlos, César [0000-0001-8616-7001], Ochoa-Hueso, Raúl [0000-0002-1839-6926], Wang, Jun-Tao [0000-0002-1822-2176], Trivedi, Pankaj [0000-0003-0173-2804], Zhou, Guiyao [0000-0002-1385-3913], Piñeiro, Juan [0000-0002-0825-4174], Singh, Brajesh K. [0000-0003-4413-4185], Delgado-Baquerizo, Manuel [0000-0002-6499-576X], Liu, Shengen, Plaza de Carlos, César, Ochoa-Hueso, Raúl, Trivedi, Chanda, Wang, Jun-Tao, Trivedi, Pankaj, Zhou, Guiyao, Piñeiro, Juan, Martins, Catarina S. C., Singh, Brajesh K., Delgado-Baquerizo, Manuel, National Natural Science Foundation of China, China Postdoctoral Science Foundation, Yunnan Provincial Academy of Science and Technology, Alexander von Humboldt Foundation, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), European Agricultural Fund for Rural Development, European Association of Innovation, Australian Research Council, European Commission, Liu, Shengen [0000-0002-4730-5202], Plaza de Carlos, César [0000-0001-8616-7001], Ochoa-Hueso, Raúl [0000-0002-1839-6926], Wang, Jun-Tao [0000-0002-1822-2176], Trivedi, Pankaj [0000-0003-0173-2804], Zhou, Guiyao [0000-0002-1385-3913], Piñeiro, Juan [0000-0002-0825-4174], Singh, Brajesh K. [0000-0003-4413-4185], Delgado-Baquerizo, Manuel [0000-0002-6499-576X], Liu, Shengen, Plaza de Carlos, César, Ochoa-Hueso, Raúl, Trivedi, Chanda, Wang, Jun-Tao, Trivedi, Pankaj, Zhou, Guiyao, Piñeiro, Juan, Martins, Catarina S. C., Singh, Brajesh K., and Delgado-Baquerizo, Manuel

Abstract

The decomposition of litter and the supply of nutrients into and from the soil are two fundamental processes through which the above- and belowground world interact. Microbial biodiversity, and especially that of decomposers, plays a key role in these processes by helping litter decomposition. Yet the relative contribution of litter diversity and soil biodiversity in supporting multiple ecosystem services remains virtually unknown. Here we conducted a mesocosm experiment where leaf litter and soil biodiversity were manipulated to investigate their influence on plant productivity, litter decomposition, soil respiration, and enzymatic activity in the littersphere. We showed that both leaf litter diversity and soil microbial diversity (richness and community composition) independently contributed to explain multiple ecosystem functions. Fungal saprobes community composition was especially important for supporting ecosystem multifunctionality (EMF), plant production, litter decomposition, and activity of soil phosphatase when compared with bacteria or other fungal functional groups and litter species richness. Moreover, leaf litter diversity and soil microbial diversity exerted previously undescribed and significantly interactive effects on EMF and multiple individual ecosystem functions, such as litter decomposition and plant production. Together, our work provides experimental evidence supporting the independent and interactive roles of litter and belowground soil biodiversity to maintain ecosystem functions and multiple services.

Published
2023

22. Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts

Author

Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), Ministerio de Universidades (España), European Commission, Junta de Andalucía, Fundación Biodiversidad, Belgian American Educational Foundation, Research Foundation - Flanders, European Agricultural Fund for Rural Development, Czech Science Foundation, Academy of Sciences of the Czech Republic, National Science Foundation (US), National Institute of Food and Agriculture (US), DePaul University, Huron Mountain Wildlife Foundation, Ochoa-Hueso, Raúl [0000-0002-1839-6926], Delgado-Baquerizo, Manuel [0000-0002-6499-576X], Britton, A.J. [0000-0002-0603-7432], Camarero, Jesús Julio [0000-0003-2436-2922], Earl, Stevan [0000-0002-4465-452X], Epstein, Howard [0000-0003-2817-4486], Felton, Andrew [0000-0002-1533-6071], Halde, Caroline [0000-0002-4974-1411], Hanslin, Hans M. [0000-0002-3224-2368], Harris, Lorna I. [0000-0002-2637-4030], Hartsock, Jeremy [0000-0002-0468-2630], Hovstad, Knut Anders [0000-0002-7108-0787], Khalsa, Sat Darshan S. [0000-0003-1995-2469], LaMontagne, Jalene M. [0000-0001-7713-8591], Lavergne, Stéphanie [0000-0002-7197-107X], Littke, Kim [0000-0002-0187-1663], Licht, Mark A. [0000-0001-6640-7856], McDaniel, Marshall D. [0000-0001-6267-7293], McIntosh, Anne C. S. [0000-0002-7802-2205], Miesel, Jessica R. [0000-0001-7446-464X], Moreno, Gerardo [0000-0001-8053-2696], Pakeman, Robin J. [0000-0001-6248-4133], Pinno, Bradley D., Piñeiro, Juan [0000-0002-0825-4174], Rolo, Víctor [0000-0001-5854-9512], Rutherford, P. Michael [0000-0002-5065-7700], Sayer, Emma J. [0000-0002-3322-4487], Van Sundert, Kevin [0000-0001-6180-3075], Vitkova, Michaela [0000-0002-2848-7725], Weigel, R. [0000-0001-9685-6783], Wilton, Meaghan [0000-0003-2915-3863], Ochoa-Hueso, Raúl, Delgado-Baquerizo, Manuel, Risch, Anita C., Ashton, Louise, Augustine, David, Bélanger, Nicolas, Bridgham, Scott, Britton, A.J., Bruckman, Viktor J., Camarero, Jesús Julio, Cornelissen, Gerard, Crawford John A., Dijkstra, Feike A., Diochon, Amanda, Earl, Stevan, Edgerley, James, Epstein, Howard, Felton, Andrew, Fortier, Julien, Gagnon, Daniel, Greer, Ken, Griffiths, Hannah M, Halde, Caroline, Hanslin, Hans M., Harris, Lorna I., Hartsock, Jeremy, Hendrickson, Paul, Hovstad, Knut Anders, Hu, Jia, Jani. Arun D., Kent, Kelcy, Kerdraon-Byrne, Deirdre, Khalsa, Sat Darshan S., Lai, Derrick Y. F., Lambert, France, LaMontagne, Jalene M., Lavergne, Stéphanie, Lawrence. Beth A., Littke, Kim, Leeper, Abigail C., Licht, Mark A., Liebig, Mark A., Lynn, Joshua S., Maclean, Janet E., Martinsen, Vegard, McDaniel, Marshall D., McIntosh, Anne C. S., Miesel, Jessica R., Miller, Jim, Mulvaney, Michael J., Moreno, Gerardo, Newstead, Laura, Pakeman, Robin J., Pergl, Jan, Piñeiro, Juan, Quigley, Kathleen, Radtke, Troy M., Reed, Paul, Rolo, Víctor, Rudgers, Jennifer, Rutherford, P. Michael, Sayer, Emma J., Serrano-Grijalva, Lilia, Strack, Maria, Sukdeo, Nicole, Taylor, Andy F. S., Truax, Benoit, Tsuji, Leonard J. S., Van Gestel, Natasja, Vaness, Brenda M., Van Sundert, Kevin, Vitkova, Michaela, Weigel, R., Wilton, Meaghan, Yano, Yuriko, Teen, Ewing, Bremer, Eric, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), Ministerio de Universidades (España), European Commission, Junta de Andalucía, Fundación Biodiversidad, Belgian American Educational Foundation, Research Foundation - Flanders, European Agricultural Fund for Rural Development, Czech Science Foundation, Academy of Sciences of the Czech Republic, National Science Foundation (US), National Institute of Food and Agriculture (US), DePaul University, Huron Mountain Wildlife Foundation, Ochoa-Hueso, Raúl [0000-0002-1839-6926], Delgado-Baquerizo, Manuel [0000-0002-6499-576X], Britton, A.J. [0000-0002-0603-7432], Camarero, Jesús Julio [0000-0003-2436-2922], Earl, Stevan [0000-0002-4465-452X], Epstein, Howard [0000-0003-2817-4486], Felton, Andrew [0000-0002-1533-6071], Halde, Caroline [0000-0002-4974-1411], Hanslin, Hans M. [0000-0002-3224-2368], Harris, Lorna I. [0000-0002-2637-4030], Hartsock, Jeremy [0000-0002-0468-2630], Hovstad, Knut Anders [0000-0002-7108-0787], Khalsa, Sat Darshan S. [0000-0003-1995-2469], LaMontagne, Jalene M. [0000-0001-7713-8591], Lavergne, Stéphanie [0000-0002-7197-107X], Littke, Kim [0000-0002-0187-1663], Licht, Mark A. [0000-0001-6640-7856], McDaniel, Marshall D. [0000-0001-6267-7293], McIntosh, Anne C. S. [0000-0002-7802-2205], Miesel, Jessica R. [0000-0001-7446-464X], Moreno, Gerardo [0000-0001-8053-2696], Pakeman, Robin J. [0000-0001-6248-4133], Pinno, Bradley D., Piñeiro, Juan [0000-0002-0825-4174], Rolo, Víctor [0000-0001-5854-9512], Rutherford, P. Michael [0000-0002-5065-7700], Sayer, Emma J. [0000-0002-3322-4487], Van Sundert, Kevin [0000-0001-6180-3075], Vitkova, Michaela [0000-0002-2848-7725], Weigel, R. [0000-0001-9685-6783], Wilton, Meaghan [0000-0003-2915-3863], Ochoa-Hueso, Raúl, Delgado-Baquerizo, Manuel, Risch, Anita C., Ashton, Louise, Augustine, David, Bélanger, Nicolas, Bridgham, Scott, Britton, A.J., Bruckman, Viktor J., Camarero, Jesús Julio, Cornelissen, Gerard, Crawford John A., Dijkstra, Feike A., Diochon, Amanda, Earl, Stevan, Edgerley, James, Epstein, Howard, Felton, Andrew, Fortier, Julien, Gagnon, Daniel, Greer, Ken, Griffiths, Hannah M, Halde, Caroline, Hanslin, Hans M., Harris, Lorna I., Hartsock, Jeremy, Hendrickson, Paul, Hovstad, Knut Anders, Hu, Jia, Jani. Arun D., Kent, Kelcy, Kerdraon-Byrne, Deirdre, Khalsa, Sat Darshan S., Lai, Derrick Y. F., Lambert, France, LaMontagne, Jalene M., Lavergne, Stéphanie, Lawrence. Beth A., Littke, Kim, Leeper, Abigail C., Licht, Mark A., Liebig, Mark A., Lynn, Joshua S., Maclean, Janet E., Martinsen, Vegard, McDaniel, Marshall D., McIntosh, Anne C. S., Miesel, Jessica R., Miller, Jim, Mulvaney, Michael J., Moreno, Gerardo, Newstead, Laura, Pakeman, Robin J., Pergl, Jan, Piñeiro, Juan, Quigley, Kathleen, Radtke, Troy M., Reed, Paul, Rolo, Víctor, Rudgers, Jennifer, Rutherford, P. Michael, Sayer, Emma J., Serrano-Grijalva, Lilia, Strack, Maria, Sukdeo, Nicole, Taylor, Andy F. S., Truax, Benoit, Tsuji, Leonard J. S., Van Gestel, Natasja, Vaness, Brenda M., Van Sundert, Kevin, Vitkova, Michaela, Weigel, R., Wilton, Meaghan, Yano, Yuriko, Teen, Ewing, and Bremer, Eric

Abstract

Understanding the chemical composition of our planet's crust was one of the biggest questions of the 20th century. More than 100 years later, we are still far from understanding the global patterns in the bioavailability and spatial coupling of elements in topsoils worldwide, despite their importance for the productivity and functioning of terrestrial ecosystems. Here, we measured the bioavailability and coupling of thirteen macro- and micronutrients and phytotoxic elements in topsoils (3–8 cm) from a range of terrestrial ecosystems across all continents (∼10,000 observations) and in response to global change manipulations (∼5,000 observations). For this, we incubated between 1 and 4 pairs of anionic and cationic exchange membranes per site for a mean period of 53 days. The most bioavailable elements (Ca, Mg, and K) were also amongst the most abundant in the crust. Patterns of bioavailability were biome-dependent and controlled by soil properties such as pH, organic matter content and texture, plant cover, and climate. However, global change simulations resulted in important alterations in the bioavailability of elements. Elements were highly coupled, and coupling was predictable by the atomic properties of elements, particularly mass, mass to charge ratio, and second ionization energy. Deviations from the predictable coupling-atomic mass relationship were attributed to global change and agriculture. Our work illustrates the tight links between the bioavailability and coupling of topsoil elements and environmental context, human activities, and atomic properties of elements, thus deeply enhancing our integrated understanding of the biogeochemical connections that underlie the productivity and functioning of terrestrial ecosystems in a changing world.

Published
2023

23. Anatomical drivers of stomatal conductance in sorghum lines with different leaf widths grown under different temperatures

Author

Centre of Excellence for Translational Photosynthesis (Australia), Agencia Estatal de Investigación (España), Al-Salman, Yazen [0000-0002-5448-7497], Cano, F. J. [0000-0001-5720-5865], Piñeiro, Juan [0000-0002-0825-4174], Jordan, David [0000-0002-8128-1304], Ghannoum, Oula [0000-0002-1341-0741], Al-Salman, Yazen, Cano, F. J., Pan, Ling, Koller, Fiona, Piñeiro, Juan, Jordan, David, Ghannoum, Oula, Centre of Excellence for Translational Photosynthesis (Australia), Agencia Estatal de Investigación (España), Al-Salman, Yazen [0000-0002-5448-7497], Cano, F. J. [0000-0001-5720-5865], Piñeiro, Juan [0000-0002-0825-4174], Jordan, David [0000-0002-8128-1304], Ghannoum, Oula [0000-0002-1341-0741], Al-Salman, Yazen, Cano, F. J., Pan, Ling, Koller, Fiona, Piñeiro, Juan, Jordan, David, and Ghannoum, Oula

Abstract

Sustaining crop productivity and resilience in water-limited environments and under rising temperatures are matters of concern worldwide. We investigated the leaf anatomical traits that underpin our recently identified link between leaf width (LW) and intrinsic water use efficiency (iWUE), as traits of interest in plant breeding. Ten sorghum lines with varying LW were grown under three temperatures to expand the range of variation of both LW and gas exchange rates. Leaf gas exchange, surface morphology and cross-sectional anatomy were measured and analysed using structural equations modelling. Narrower leaves had lower stomatal conductance (gs ) and higher iWUE across growth temperatures. They also had smaller intercellular airspaces, stomatal size, percentage of open stomatal aperture relative to maximum, hydraulic pathway, mesophyll thickness, and leaf mass per area. Structural modelling revealed a developmental association among leaf anatomical traits that underpinned gs variation in sorghum. Growing temperature and LW both impacted leaf gas exchange rates, but only LW directly impacted leaf anatomy. Wider leaves may be more productive under well-watered conditions, but consume more water for growth and development, which is detrimental under water stress.

Published
2023

24. Prospective primary teachers' initial mathematical problem-solving knowledge.

Author

Piñeiro, Juan Luis, Chapman, Olive, Castro-Rodríguez, Elena, and Castro, Enrique

Subjects
*PRIMARY school teachers, *MATHEMATICS education, *MATHEMATICS teachers, *PROBLEM solving, *TEACHER education
Abstract

Mathematics teacher candidates enter teacher education with knowledge that could support or limit their learning. It is therefore important to gain insights of this knowledge to inform teacher education. This paper offers such insights for prospective mathematics teachers' initial knowledge of problem solving (PS) for teaching at the beginning of their teacher education programme. It reports on a study that investigated three categories of problem-solving knowledge for teaching: problem characterization, the PS process, and PS disposition. Participants were 109 prospective primary teachers at a university in Spain. Data sources were questionnaires designed for the study to explore the initial knowledge held by the participants for three categories of problem-solving knowledge. Findings indicated that the participants' knowledge was stronger regarding the PS process and disposition than for problem characterization but had limitations that needed to be addressed in their teacher preparation programme. [ABSTRACT FROM AUTHOR]

Published
2024
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25. LOS SUPUESTOS TEÓRICOS ACERCA DE LA FUNCIÓN DE I+D EN LA EVALUACIÓN INSTITUCIONAL CONEAU. EL CASO DE LA UNIVERSIDAD NACIONAL DE LA MATANZA.

Author

Pablo PIÑEIRO, Juan, LEVY, Melina, and AMARILLA, Yanina

Subjects
UNIVERSITY rankings, UNIVERSITY & college accreditation, DECISION making, MANAGEMENT science, POSSIBILITY
Abstract

Copyright of Artefactos: Revista de Estudios Sobre La Ciencia Y La Tecnologia is the property of Ediciones Universidad de Salamanca and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2024
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26. Microbial competition for phosphorus limits the CO2 response of a mature forest.

Author

Jiang, Mingkai, Crous, Kristine Y., Carrillo, Yolima, Macdonald, Catriona A., Anderson, Ian C., Boer, Matthias M., Farrell, Mark, Gherlenda, Andrew N., Castañeda-Gómez, Laura, Hasegawa, Shun, Jarosch, Klaus, Milham, Paul J., Ochoa-Hueso, Rául, Pathare, Varsha, Pihlblad, Johanna, Piñeiro, Juan, Powell, Jeff R., Power, Sally A., Reich, Peter B., and Riegler, Markus

Abstract

The capacity for terrestrial ecosystems to sequester additional carbon (C) with rising CO2 concentrations depends on soil nutrient availability1,2. Previous evidence suggested that mature forests growing on phosphorus (P)-deprived soils had limited capacity to sequester extra biomass under elevated CO2 (refs. 3–6), but uncertainty about ecosystem P cycling and its CO2 response represents a crucial bottleneck for mechanistic prediction of the land C sink under climate change7. Here, by compiling the first comprehensive P budget for a P-limited mature forest exposed to elevated CO2, we show a high likelihood that P captured by soil microorganisms constrains ecosystem P recycling and availability for plant uptake. Trees used P efficiently, but microbial pre-emption of mineralized soil P seemed to limit the capacity of trees for increased P uptake and assimilation under elevated CO2 and, therefore, their capacity to sequester extra C. Plant strategies to stimulate microbial P cycling and plant P uptake, such as increasing rhizosphere C release to soil, will probably be necessary for P-limited forests to increase C capture into new biomass. Our results identify the key mechanisms by which P availability limits CO2 fertilization of tree growth and will guide the development of Earth system models to predict future long-term C storage.Microbial pre-emption of mineralized soil P limits the capacity of trees for increased P uptake and assimilation under elevated CO2 and therefore restricts their capacity to sequester extra C. [ABSTRACT FROM AUTHOR]

Published
2024
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29. What Makes a Task a Problem in Early Childhood Education?

Author

Ramírez-Uclés, Rafael, Castro-Rodríguez, Elena, Piñeiro, Juan Luis, and Ruiz-Hidalgo, Juan F.

Abstract

This article begins with a theoretical discussion of the characteristics that a task should feature to be regarded as a mathematics problem suitable for pre-primary students. Those considerations are followed by a report of a classroom experience in which three problems involving quotative or partitive division were posed to pre-primary school children to determine the presence of otherwise of the respective characteristics. The findings show that the characteristics of pre-primary education problems depend on two factors: mathematical activity that engages children and a structure that favours both their understanding of the problem and the application and verification of the solutions.

Published
2018
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31. Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts

Author

Ochoa-Hueso, Raúl, Delgado-Baquerizo, Manuel, Risch, Anita C., Ashton, Louise, Augustine, David, Bélanger, Nicolas, Bridgham, Scott, Britton, A.J., Bruckman, Viktor J., Camarero, Jesús Julio, Cornelissen, Gerard, Crawford John A., Dijkstra, Feike A., Diochon, Amanda, Earl, Stevan, Edgerley, James, Epstein, Howard, Felton, Andrew, Fortier, Julien, Gagnon, Daniel, Greer, Ken, Griffiths, Hannah M, Halde, Caroline, Hanslin, Hans M., Harris, Lorna I., Hartsock, Jeremy, Hendrickson, Paul, Hovstad, Knut Anders, Hu, Jia, Jani. Arun D., Kent, Kelcy, Kerdraon-Byrne, Deirdre, Khalsa, Sat Darshan S., Lai, Derrick Y. F., Lambert, France, LaMontagne, Jalene M., Lavergne, Stéphanie, Lawrence. Beth A., Littke, Kim, Leeper, Abigail C., Licht, Mark A., Liebig, Mark A., Lynn, Joshua S., Maclean, Janet E., Martinsen, Vegard, McDaniel, Marshall D., McIntosh, Anne C. S., Miesel, Jessica R., Miller, Jim, Mulvaney, Michael J., Moreno, Gerardo, Newstead, Laura, Pakeman, Robin J., Pergl, Jan, Piñeiro, Juan, Quigley, Kathleen, Radtke, Troy M., Reed, Paul, Rolo, Víctor, Rudgers, Jennifer, Rutherford, P. Michael, Sayer, Emma J., Serrano-Grijalva, Lilia, Strack, Maria, Sukdeo, Nicole, Taylor, Andy F. S., Truax, Benoit, Tsuji, Leonard J. S., Van Gestel, Natasja, Vaness, Brenda M., Van Sundert, Kevin, Vitkova, Michaela, Weigel, R., Wilton, Meaghan, Yano, Yuriko, Teen, Ewing, Bremer, Eric, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), Ministerio de Universidades (España), European Commission, Junta de Andalucía, Fundación Biodiversidad, National Science Foundation Macrosystems Biology, Belgian American Educational Foundation, Fulbright Program and the Fund for Scientific Research-Flanders, European Agricultural Fund for Rural Development, Czech Science Foundation, Czech Academy of Sciences, National Science Foundation (US), National Institute of Food and Agriculture (US), DePaul University, Huron Mountain Wildlife Foundation, Ochoa-Hueso, Raúl, Delgado-Baquerizo, Manuel, Britton, A.J., Camarero, Jesús Julio, Earl, Stevan, Epstein, Howard, Felton, Andrew, Halde, Caroline, Hanslin, Hans M., Harris, Lorna I., Hartsock, Jeremy, Hovstad, Knut Anders, Khalsa, Sat Darshan S., LaMontagne, Jalene M., Lavergne, Stéphanie, Littke, Kim, Licht, Mark A., McDaniel, Marshall D., McIntosh, Anne C. S., Miesel, Jessica R., Moreno, Gerardo, Pakeman, Robin J., Pinno, Bradley D., Piñeiro, Juan, Rolo, Víctor, Rutherford, P. Michael, Sayer, Emma J., Van Sundert, Kevin, Vitkova, Michaela, Weigel, R., and Wilton, Meaghan

Abstract

14 páginas.- 6 figuras.- 53 referencias, Understanding the chemical composition of our planet's crust was one of the biggest questions of the 20th century. More than 100 years later, we are still far from understanding the global patterns in the bioavailability and spatial coupling of elements in topsoils worldwide, despite their importance for the productivity and functioning of terrestrial ecosystems. Here, we measured the bioavailability and coupling of thirteen macro- and micronutrients and phytotoxic elements in topsoils (3–8 cm) from a range of terrestrial ecosystems across all continents (∼10,000 observations) and in response to global change manipulations (∼5,000 observations). For this, we incubated between 1 and 4 pairs of anionic and cationic exchange membranes per site for a mean period of 53 days. The most bioavailable elements (Ca, Mg, and K) were also amongst the most abundant in the crust. Patterns of bioavailability were biome-dependent and controlled by soil properties such as pH, organic matter content and texture, plant cover, and climate. However, global change simulations resulted in important alterations in the bioavailability of elements. Elements were highly coupled, and coupling was predictable by the atomic properties of elements, particularly mass, mass to charge ratio, and second ionization energy. Deviations from the predictable coupling-atomic mass relationship were attributed to global change and agriculture. Our work illustrates the tight links between the bioavailability and coupling of topsoil elements and environmental context, human activities, and atomic properties of elements, thus deeply enhancing our integrated understanding of the biogeochemical connections that underlie the productivity and functioning of terrestrial ecosystems in a changing world., We acknowledge the following people as additional data contributors: Drs. G. Blume-Werry, V. Bruckman, J. Buss, S. Collins, E. Dorrepaal, K.N. Egger, J. Fridley, Gibson-Roy, R. Harrison, J. Heberling, K. Helsen, E. Hinman, A. K olstad, N. Lemoine, M. Lesser, E. Li, S. E. Macdonald, E. Mallory, E. Massicotte, H.B. Massicotte, T. Moore, C. Morris, L. Nijs, M. Smith, Suojala-Ahlfors, E. Thiffault, K. Trepanier, R. Uusitalo, L. Van Langenhove, S. Vicca, F. Wang, M. Werner, K. White and S. Wilson. R.O.H. was funded by the Ramón y Cajal program of the MICINN (RYC-2017 22032), by the R&D Project of the Ministry of Science and Innovation PID2019-106004RA-I00 funded by MCIN/AEI/10.13039/501100011033, by the program José Castillejo” of the “Ministry of Universities” (CAS21/00125), by a project of the European Regional Development Fund (FEDER) and the Ministry of Economic Transformation, Industry, Knowledge and Universities of the Junta de Andalucía (ERDF Andalucía 2014–2020 Thematic objective “01—Reinforcement of research, technological development and innovation”): P20_00323 (FUTURE-VINES), by the European Agricultural Fund for Rural Development (EAFRD) through the “Aid to operational groups of the European Association of Innovation (AEI) in terms of agricultural productivity and sustainability,” Reference: GOPC-CA-20-0001, and from Fundación Biodiversidad (SOILBIO). M.D-B. was supported by a Ramón y Cajal Grant (RYC2018-025483-I), a project from the Spanish Ministry of Science and Innovation (PID2020-115813RA-I00), and a project PAIDI 2020 from the Junta de Andalucía (P20_00879). JP acknowl-edges funding from MICINN (RYC–2021–033454). S. Bridgham and P. Reed were supported from National Science Foundation Macrosystems Biology Grant 1340847. KVS acknowledges support from the Belgian American Educational Foundation (Paul Vernel Fellow), the Fulbright Program and the Fund for Scientific Research-Flanders. J. Pergl and M. Vítková were partly supported by 17-19025S, EXPRO Grant 19-28807X (Czech Science Foundation), BiodivClim Call 2019 (Grant TACR SS70010001) and long-term research development project RVO 67985939 (Czech Academy of Sciences). Natasja van Gestel was funded by the National Science Foundation Grant 1643871. Stevan Earl was partially supported by the National Science Foundation under Grant DEB-2224662, Central Arizona-Phoenix Long-Term Ecological Research Program (CAP LTER). Lilia Serrano-Grijalva has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 890874. Kevin van Sundert acknowledges support from the Fund for Scientific Research-Flanders. Yuriko Yano acknowledges USDA, National Institute of Food and Agriculture Grant, Award number 2015-67020-23454. A. Leeper, B. Lawrence, and J. LaMontagne acknowledge support from National Science Foundation Grant DEB-1745496, the University Research Council Collaborative Grant from DePaul University, and the Huron Mountain Wildlife Foundation.

Published
2023

34. Two-Dose Ceftiofur Treatment Increases Cephamycinase Gene Quantities and Fecal Microbiome Diversity in Dairy Cows Diagnosed with Metritis

Author

Ossa-Trujillo, Claudia, primary, Taylor, Ethan A., additional, Sarwar, Fatima, additional, Vinasco, Javier, additional, Jordan, Ellen R., additional, Buitrago, Jose A. García, additional, Hagevoort, G. Robert, additional, Lawhon, Sara D., additional, Piñeiro, Juan M., additional, Galloway-Peña, Jessica, additional, Norman, Keri N., additional, and Scott, Harvey Morgan, additional

Published
2023
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35. 352 Effects of Including a Novel High-Anthocyanin Corn Cob Meal in a High-Roughage Diet on Performance and Gas Flux of Beef Cattle

Author

Long, Nathan S, primary, Proctor, Jarret A, additional, Xu, Wenwei W, additional, Molsbee, Morgan K, additional, Piñeiro, Juan M, additional, Gouvea, Vinicius N, additional, Duhatschek, Douglas, additional, Foster, Ryan C, additional, Beck, Matthew R, additional, Griffin, MacKenzie L, additional, and Smith, Jason K, additional

Published
2023
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41. Microbial competition for phosphorus limits the CO2response of a mature forest

Author

Jiang, Mingkai, Crous, Kristine Y., Carrillo, Yolima, Macdonald, Catriona A., Anderson, Ian C., Boer, Matthias M., Farrell, Mark, Gherlenda, Andrew N., Castañeda-Gómez, Laura, Hasegawa, Shun, Jarosch, Klaus, Milham, Paul J., Ochoa-Hueso, Rául, Pathare, Varsha, Pihlblad, Johanna, Piñeiro, Juan, Powell, Jeff R., Power, Sally A., Reich, Peter B., Riegler, Markus, Zaehle, Sönke, Smith, Benjamin, Medlyn, Belinda E., and Ellsworth, David S.

Abstract

The capacity for terrestrial ecosystems to sequester additional carbon (C) with rising CO2concentrations depends on soil nutrient availability1,2. Previous evidence suggested that mature forests growing on phosphorus (P)-deprived soils had limited capacity to sequester extra biomass under elevated CO2(refs. 3–6), but uncertainty about ecosystem P cycling and its CO2response represents a crucial bottleneck for mechanistic prediction of the land C sink under climate change7. Here, by compiling the first comprehensive P budget for a P-limited mature forest exposed to elevated CO2, we show a high likelihood that P captured by soil microorganisms constrains ecosystem P recycling and availability for plant uptake. Trees used P efficiently, but microbial pre-emption of mineralized soil P seemed to limit the capacity of trees for increased P uptake and assimilation under elevated CO2and, therefore, their capacity to sequester extra C. Plant strategies to stimulate microbial P cycling and plant P uptake, such as increasing rhizosphere C release to soil, will probably be necessary for P-limited forests to increase C capture into new biomass. Our results identify the key mechanisms by which P availability limits CO2fertilization of tree growth and will guide the development of Earth system models to predict future long-term C storage.

Published
2024
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42. La toma de decisiones de futuros maestros de primaria al interactuar con el pensamiento algebraico de niños.

Author

Pinto, Eder, Luis Piñeiro, Juan, Cortés, Camila, and Martínez-Videla, M. Victoria

Subjects
*PRIMARY school teachers, *ELEMENTARY school teachers, *MATHEMATICAL equivalence, *ALGEBRA education, *RESEARCH questions
Abstract

This study focuses on the research question: How do prospective elementary school teachers (FT) make decisions when considering the algebraic thinking of 9-year-old children? A specific type of noticing was used to describe the decisions of 21 FT when observing the strategies employed by 3 children to solve the equation 6+4=+5. The FT participated in a six-session course on the teaching and learning of algebra, based on video analysis as a means to approach teaching practice. Focusing on sessions 1 and 2, the written responses of the FT to two distinct questions were examined. The main results show that, although the FT's decisions frequently lacked evidential support, their reasoning aligned with specific aspects of algebraic thinking and research covered during the course. Finally, two positions adopted by the FT in decision making were identified: a) arithmetic, centred on the calculations that children should follow, and (b) relational, focused on the interplay of operations through the equals sign. The role of noticing and video analysis as tools to bring future primary school teachers closer to the practice of teaching algebra in primary education was discussed. [ABSTRACT FROM AUTHOR]

Published
2024
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43. Litter and soil biodiversity jointly drive ecosystem functions

Author

Liu, Shengen, primary, Plaza, César, additional, Ochoa‐Hueso, Raúl, additional, Trivedi, Chanda, additional, Wang, Juntao, additional, Trivedi, Pankaj, additional, Zhou, Guiyao, additional, Piñeiro, Juan, additional, Martins, Catarina S. C., additional, Singh, Brajesh K., additional, and Delgado‐Baquerizo, Manuel, additional

Published
2023
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45. Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts

Author

Ochoa‐Hueso, Raúl, primary, Delgado‐Baquerizo, Manuel, additional, Risch, Anita C., additional, Ashton, Louise, additional, Augustine, David, additional, Bélanger, Nicolas, additional, Bridgham, Scott, additional, Britton, Andrea J., additional, Bruckman, Viktor J., additional, Camarero, J. Julio, additional, Cornelissen, Gerard, additional, Crawford, John A., additional, Dijkstra, Feike A., additional, Diochon, Amanda, additional, Earl, Stevan, additional, Edgerley, James, additional, Epstein, Howard, additional, Felton, Andrew, additional, Fortier, Julien, additional, Gagnon, Daniel, additional, Greer, Ken, additional, Griffiths, Hannah M., additional, Halde, Caroline, additional, Hanslin, Hans Martin, additional, Harris, Lorna I., additional, Hartsock, Jeremy A., additional, Hendrickson, Paul, additional, Hovstad, Knut Anders, additional, Hu, Jia, additional, Jani, Arun D., additional, Kent, Kelcy, additional, Kerdraon‐Byrne, Deirdre, additional, Khalsa, Sat Darshan S., additional, Lai, Derrick Y. F., additional, Lambert, France, additional, LaMontagne, Jalene M., additional, Lavergne, Stéphanie, additional, Lawrence, Beth A., additional, Littke, Kim, additional, Leeper, Abigail C., additional, Licht, Mark A., additional, Liebig, Mark A., additional, Lynn, Joshua S., additional, Maclean, Janet E., additional, Martinsen, Vegard, additional, McDaniel, Marshall D., additional, McIntosh, Anne C. S., additional, Miesel, Jessica R., additional, Miller, Jim, additional, Mulvaney, Michael J., additional, Moreno, Gerardo, additional, Newstead, Laura, additional, Pakeman, Robin J., additional, Pergl, Jan, additional, Pinno, Bradley D., additional, Piñeiro, Juan, additional, Quigley, Kathleen, additional, Radtke, Troy M., additional, Reed, Paul, additional, Rolo, Víctor, additional, Rudgers, Jennifer, additional, Rutherford, P. Michael, additional, Sayer, Emma J., additional, Serrano‐Grijalva, Lilia, additional, Strack, Maria, additional, Sukdeo, Nicole, additional, Taylor, Andy F. S., additional, Truax, Benoit, additional, Tsuji, Leonard J. S., additional, van Gestel, Natasja, additional, Vaness, Brenda M., additional, Van Sundert, Kevin, additional, Vítková, Michaela, additional, Weigel, Robert, additional, Wilton, Meaghan J., additional, Yano, Yuriko, additional, Teen, Ewing, additional, and Bremer, Eric, additional

Published
2023
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46. Anatomical drivers of stomatal conductance in sorghum lines with different leaf widths grown under different temperatures

Author

Al-Salman, Yazen, Cano, Francisco J., Pan, Ling, Koller, Fiona, Piñeiro, Juan, Jordan, David R., Ghannoum, Oula, Al-Salman, Yazen, Cano, Francisco J., Pan, Ling, Koller, Fiona, Piñeiro, Juan, Jordan, David R., and Ghannoum, Oula

Abstract

Sustaining crop productivity and resilience in water-limited environments and under rising temperatures are matters of concern worldwide. We investigated the leaf anatomical traits that underpin our recently identified link between leaf width (LW) and intrinsic water use efficiency (iWUE), as traits of interest in plant breeding. Ten sorghum lines with varying LW were grown under three temperatures to expand the range of variation of both LW and gas exchange rates. Leaf gas exchange, surface morphology and cross-sectional anatomy were measured and analysed using structural equations modelling. Narrower leaves had lower stomatal conductance (gs) and higher iWUE across growth temperatures. They also had smaller intercellular airspaces, stomatal size, percentage of open stomatal aperture relative to maximum, hydraulic pathway, mesophyll thickness, and leaf mass per area. Structural modelling revealed a developmental association among leaf anatomical traits that underpinned gs variation in sorghum. Growing temperature and LW both impacted leaf gas exchange rates, but only LW directly impacted leaf anatomy. Wider leaves may be more productive under well-watered conditions, but consume more water for growth and development, which is detrimental under water stress.

Published
2023

47. Bioavailability of macro and micronutrients across global topsoils : Main drivers and global change impacts

Author

Ochoa‐Hueso, Raúl, Delgado‐Baquerizo, Manuel, Risch, Anita C., Ashton, Louise, Augustine, David, Bélanger, Nicolas, Bridgham, Scott, Britton, Andrea J., Bruckman, Viktor J., Camarero, J. Julio, Cornelissen, Gerard, Crawford, John A., Dijkstra, Feike A., Diochon, Amanda, Earl, Stevan, Edgerley, James, Epstein, Howard, Felton, Andrew, Fortier, Julien, Gagnon, Daniel, Greer, Ken, Griffiths, Hannah M, Halde, Caroline, Hanslin, Hans Martin, Harris, Lorna I., Hartsock, Jeremy A., Hendrickson, Paul, Hovstad, Knut Anders, Hu, Jia, Jani, Arun D., Kent, Kelcy, Kerdraon‐Byrne, Deirdre, Khalsa, Sat Darshan S., Lai, Derrick Y.F., Lambert, France, LaMontagne, Jalene M., Lavergne, Stéphanie, Lawrence, Beth A., Littke, Kim, Leeper, Abigail C., Licht, Mark A., Liebig, Mark A., Lynn, Joshua S., Maclean, Janet E., Martinsen, Vegard, McDaniel, Marshall D., McIntosh, Anne C. S., Miesel, Jessica R., Miller, Jim, Mulvaney, Michael J., Moreno, Gerardo, Newstead, Laura, Pakeman, Robin J., Pergl, Jan, Pinno, Bradley D., Piñeiro, Juan, Quigley, Kathleen, Radtke, Troy M., Reed, Paul, Rolo, Víctor, Rudgers, Jennifer, Rutherford, P. Michael, Sayer, Emma J., Serrano‐Grijalva, Lilia, Strack, Maria, Sukdeo, Nicole, Taylor, Andy F.S., Truax, Benoit, Tsuji, Leonard J. S., van Gestel, Natasja, Vaness, Brenda M., Van Sundert, Kevin, Vítková, Michaela, Weigel, Robert, Wilton, Meaghan J., Yano, Yuriko, Teen, Ewing, Bremer, Eric, Ochoa‐Hueso, Raúl, Delgado‐Baquerizo, Manuel, Risch, Anita C., Ashton, Louise, Augustine, David, Bélanger, Nicolas, Bridgham, Scott, Britton, Andrea J., Bruckman, Viktor J., Camarero, J. Julio, Cornelissen, Gerard, Crawford, John A., Dijkstra, Feike A., Diochon, Amanda, Earl, Stevan, Edgerley, James, Epstein, Howard, Felton, Andrew, Fortier, Julien, Gagnon, Daniel, Greer, Ken, Griffiths, Hannah M, Halde, Caroline, Hanslin, Hans Martin, Harris, Lorna I., Hartsock, Jeremy A., Hendrickson, Paul, Hovstad, Knut Anders, Hu, Jia, Jani, Arun D., Kent, Kelcy, Kerdraon‐Byrne, Deirdre, Khalsa, Sat Darshan S., Lai, Derrick Y.F., Lambert, France, LaMontagne, Jalene M., Lavergne, Stéphanie, Lawrence, Beth A., Littke, Kim, Leeper, Abigail C., Licht, Mark A., Liebig, Mark A., Lynn, Joshua S., Maclean, Janet E., Martinsen, Vegard, McDaniel, Marshall D., McIntosh, Anne C. S., Miesel, Jessica R., Miller, Jim, Mulvaney, Michael J., Moreno, Gerardo, Newstead, Laura, Pakeman, Robin J., Pergl, Jan, Pinno, Bradley D., Piñeiro, Juan, Quigley, Kathleen, Radtke, Troy M., Reed, Paul, Rolo, Víctor, Rudgers, Jennifer, Rutherford, P. Michael, Sayer, Emma J., Serrano‐Grijalva, Lilia, Strack, Maria, Sukdeo, Nicole, Taylor, Andy F.S., Truax, Benoit, Tsuji, Leonard J. S., van Gestel, Natasja, Vaness, Brenda M., Van Sundert, Kevin, Vítková, Michaela, Weigel, Robert, Wilton, Meaghan J., Yano, Yuriko, Teen, Ewing, and Bremer, Eric

Abstract

Understanding the chemical composition of our planet's crust was one of the biggest questions of the 20th century. More than 100 years later, we are still far from understanding the global patterns in the bioavailability and spatial coupling of elements in topsoils worldwide, despite their importance for the productivity and functioning of terrestrial ecosystems. Here, we measured the bioavailability and coupling of thirteen macro‐ and micronutrients and phytotoxic elements in topsoils (3–8 cm) from a range of terrestrial ecosystems across all continents (∼10,000 observations) and in response to global change manipulations (∼5,000 observations). For this, we incubated between 1 and 4 pairs of anionic and cationic exchange membranes per site for a mean period of 53 days. The most bioavailable elements (Ca, Mg, and K) were also amongst the most abundant in the crust. Patterns of bioavailability were biome‐dependent and controlled by soil properties such as pH, organic matter content and texture, plant cover, and climate. However, global change simulations resulted in important alterations in the bioavailability of elements. Elements were highly coupled, and coupling was predictable by the atomic properties of elements, particularly mass, mass to charge ratio, and second ionization energy. Deviations from the predictable coupling‐atomic mass relationship were attributed to global change and agriculture. Our work illustrates the tight links between the bioavailability and coupling of topsoil elements and environmental context, human activities, and atomic properties of elements, thus deeply enhancing our integrated understanding of the biogeochemical connections that underlie the productivity and functioning of terrestrial ecosystems in a changing world.

Published
2023

48. Litter and soil biodiversity jointly drive ecosystem functions

Author

Liu, Shengen, Plaza, César, Ochoa‐Hueso, Raúl, Trivedi, Chanda, Wang, Juntao, Trivedi, Pankaj, Zhou, Guiyao, Piñeiro, Juan, Martins, Catarina S. C., Singh, Brajesh K., Delgado‐Baquerizo, Manuel, Liu, Shengen, Plaza, César, Ochoa‐Hueso, Raúl, Trivedi, Chanda, Wang, Juntao, Trivedi, Pankaj, Zhou, Guiyao, Piñeiro, Juan, Martins, Catarina S. C., Singh, Brajesh K., and Delgado‐Baquerizo, Manuel

Abstract

The decomposition of litter and the supply of nutrients into and from the soil are two fundamental processes through which the above- and belowground world interact. Microbial biodiversity, and especially that of decomposers, plays a key role in these processes by helping litter decomposition. Yet the relative contribution of litter diversity and soil biodiversity in supporting multiple ecosystem services remains virtually unknown. Here we conducted a mesocosm experiment where leaf litter and soil biodiversity were manipulated to investigate their influence on plant productivity, litter decomposition, soil respiration, and enzymatic activity in the littersphere. We showed that both leaf litter diversity and soil microbial diversity (richness and community composition) independently contributed to explain multiple ecosystem functions. Fungal saprobes community composition was especially important for supporting ecosystem multifunctionality (EMF), plant production, litter decomposition, and activity of soil phosphatase when compared with bacteria or other fungal functional groups and litter species richness. Moreover, leaf litter diversity and soil microbial diversity exerted previously undescribed and significantly interactive effects on EMF and multiple individual ecosystem functions, such as litter decomposition and plant production. Together, our work provides experimental evidence supporting the independent and interactive roles of litter and belowground soil biodiversity to maintain ecosystem functions and multiple services.

Published
2023

49. Shifts in bacterial traits under chronic nitrogen deposition align with soil processes in arbuscular, but not ectomycorrhizal‐associated trees.

Author

Piñeiro, Juan, Dang, Chansotheary, Walkup, Jeth G. V., Kuzniar, Teagan, Winslett, Rachel, Blazewicz, Steven J., Freedman, Zachary B., Brzostek, Edward, and Morrissey, Ember M.

Subjects
*SOILS, *NUTRIENT cycles, *BACTERIAL communities, *STABLE isotopes, *MICROBIAL communities
Abstract

Nitrogen (N) deposition increases soil carbon (C) storage by reducing microbial activity. These effects vary in soil beneath trees that associate with arbuscular (AM) and ectomycorrhizal (ECM) fungi. Variation in carbon C and N uptake traits among microbes may explain differences in soil nutrient cycling between mycorrhizal associations in response to high N loads, a mechanism not previously examined due to methodological limitations. Here, we used quantitative Stable Isotope Probing (qSIP) to measure bacterial C and N assimilation rates from an added organic compound, which we conceptualize as functional traits. As such, we applied a trait‐based approach to explore whether variation in assimilation rates of bacterial taxa can inform shifts in soil function under chronic N deposition. We show taxon‐specific and community‐wide declines of bacterial C and N uptake under chronic N deposition in both AM and ECM soils. N deposition‐induced reductions in microbial activity were mirrored by declines in soil organic matter mineralization rates in AM but not ECM soils. Our findings suggest C and N uptake traits of bacterial communities can predict C cycling feedbacks to N deposition in AM soils, but additional data, for instance on the traits of fungi, may be needed to connect microbial traits with soil C and N cycling in ECM systems. Our study also highlights the potential of employing qSIP in conjunction with trait‐based analytical approaches to inform how ecological processes of microbial communities influence soil functioning. [ABSTRACT FROM AUTHOR]

Published
2024
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