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1. Change in functional trait diversity mediates the effects of nutrient addition on grassland stability.

Author

Chen, Qingqing, Wang, Shaopeng, Seabloom, Eric W., Isbell, Forest, Borer, Elizabeth T., Bakker, Jonathan D., Bharath, Siddharth, Roscher, Christiane, Peri, Pablo Luis, Power, Sally A., Donohue, Ian, Stevens, Carly, Ebeling, Anne, Nogueira, Carla, Caldeira, Maria C., MacDougall, Andrew S., Moore, Joslin L., Bagchi, Sumanta, Jentsch, Anke, and Tedder, Michelle

Subjects
CLIMATE extremes, PLANT diversity, SPECIES diversity, BIOMASS production, RAINFALL
Abstract

Nutrient enrichment impacts grassland plant diversity such as species richness, functional trait composition and diversity, but whether and how these changes affect ecosystem stability in the face of increasing climate extremes remains largely unknown.We quantified the direct and diversity‐mediated effects of nutrient addition (by nitrogen, phosphorus, and potassium) on the stability of above‐ground biomass production in 10 long‐term grassland experimental sites. We measured five facets of stability as the temporal invariability, resistance during and recovery after extreme dry and wet growing seasons.Leaf traits (leaf carbon, nitrogen, phosphorus, potassium, and specific leaf area) were measured under ambient and nutrient addition conditions in the field and were used to construct the leaf economic spectrum (LES). We calculated functional trait composition and diversity of LES and of single leaf traits. We quantified the contribution of intraspecific trait shifts and species replacement to change in functional trait composition as responses to nutrient addition and its implications for ecosystem stability.Nutrient addition decreased functional trait diversity and drove grassland communities to the faster end of the LES primarily through intraspecific trait shifts, suggesting that intraspecific trait shifts should be included for accurately predicting ecosystem stability. Moreover, the change in functional trait diversity of the LES in turn influenced different facets of stability. That said, these diversity‐mediated effects were overall weak and/or overwhelmed by the direct effects of nutrient addition on stability. As a result, nutrient addition did not strongly impact any of the stability facets. These results were generally consistent using individual leaf traits but the dominant pathways differed. Importantly, major influencing pathways differed using average trait values extracted from global trait databases (e.g. TRY).Synthesis. Investigating changes in multiple facets of plant diversity and their impacts on multidimensional stability under global changes such as nutrient enrichment can improve our understanding of the processes and mechanisms maintaining ecosystem stability. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Percutaneous transhepatic cholangiography in the era of magnetic resonance cholangiopancreatography: A prospective comparative analysis in preoperative evaluation of benign biliary stricture

Author

Kailash C Kurdia, Santhosh Irrinki, Bharath Siddharth, Vikas Gupta, Anupam Lal, and Thakur D Yadav

Subjects
benign biliary stricture, cholecystectomy, magnetic resonance cholangiopancreatography, percutaneous transhepatic cholangiography, Roux‐en‐Y hepatico‐jejunostomy, Diseases of the digestive system. Gastroenterology, RC799-869
Abstract

Abstract Background and Aim Accurate anatomical delineation is the key before definitive repair for benign biliary stricture (BBS). The role of percutaneous transhepatic cholangiography (PTC) as a road map is less studied in the era of magnetic resonance cholangiopancreatography (MRCP). Methods A prospective observational study, performed between July 2012 and December 2013. All patients of post‐cholecystectomy BBS were evaluated with MRCP and PTC prior to definitive repair. Findings of MRCP and PTC were compared with intraoperative details. Results Thirty patients with BBS were included in the study. MRCP was performed in all but PTC was amenable in 28 of 30 (93.3%) patients. PTC was comparable to MRCP in diagnosing stricture type (96.4% vs 89.3%), intrahepatic stones (75% vs 75%), and biliary anomalies (95.6% vs 100%). Additionally, PTC revealed internal biliary fistula in 4 (85.7% vs 61.4%; P value 0.04). PTC‐related minor complications were noted in 2 (7.1%) patients. Conclusion PTC is comparable to MRCP in diagnosing the stricture type, intrahepatic biliary stones, and biliary anomalies. Though comparable to MRCP, the authors could not reveal any additional information that could change the course of management in BBS.

Published
2021
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4. Closing Notes

Author

Bharath, Siddharth, primary, Musaifer, Sara, additional, and Nagar, Richa, additional

Published
2019
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5. Linking changes in species composition and biomass in a globally distributed grassland experiment

Author

Ladouceur, Emma, primary, Blowes, Shane A., additional, Chase, Jonathan M., additional, Clark, Adam T., additional, Garbowski, Magda, additional, Alberti, Juan, additional, Arnillas, Carlos Alberto, additional, Bakker, Jonathan D., additional, Barrio, Isabel C., additional, Bharath, Siddharth, additional, Borer, Elizabeth T., additional, Brudvig, Lars A., additional, Cadotte, Marc W., additional, Chen, Qingqing, additional, Collins, Scott L., additional, Dickman, Christopher R., additional, Donohue, Ian, additional, Du, Guozhen, additional, Ebeling, Anne, additional, Eisenhauer, Nico, additional, Fay, Philip A., additional, Hagenah, Nicole, additional, Hautier, Yann, additional, Jentsch, Anke, additional, Jónsdóttir, Ingibjörg S., additional, Komatsu, Kimberly, additional, MacDougall, Andrew, additional, Martina, Jason P., additional, Moore, Joslin L., additional, Morgan, John W., additional, Peri, Pablo L., additional, Power, Sally A., additional, Ren, Zhengwei, additional, Risch, Anita C., additional, Roscher, Christiane, additional, Schuchardt, Max A., additional, Seabloom, Eric W., additional, Stevens, Carly J., additional, Veen, G.F. (Ciska), additional, Virtanen, Risto, additional, Wardle, Glenda M., additional, Wilfahrt, Peter A., additional, and Harpole, W. Stanley, additional

Published
2022
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6. Nutrient addition increases grassland resistance during dry and wet climate extremes despite functional diversity loss

Author

Chen, Qingqing, primary, Wang, Shaopeng, additional, Seabloom, Eric W., additional, Isbell, Forest, additional, Borer, Elizabeth T., additional, Bakker, Jonathan D., additional, Bharath, Siddharth, additional, Roscher, Christiane, additional, Peri, Pablo Luis, additional, Power, Sally A., additional, Donohue, Ian, additional, Stevens, Carly, additional, Ebeling, Anne, additional, Nogueira, Carla, additional, Caldeira, Maria C, additional, MacDougall, Andrew S., additional, Moore, Joslin L., additional, Bagchi, Sumanta, additional, Jentsch, Anke, additional, Tedder, Michelle, additional, Kirkman, Kevin, additional, Alberti, Juan, additional, and Hautier, Yann, additional

Published
2022
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7. Percutaneous transhepatic cholangiography in the era of magnetic resonance cholangiopancreatography: A prospective comparative analysis in preoperative evaluation of benign biliary stricture

Author

Bharath Siddharth, Thakur Deen Yadav, Santhosh Irrinki, Anupam Lal, Vikas Gupta, and Kailash C Kurdia

Subjects
medicine.medical_specialty, endocrine system diseases, medicine.medical_treatment, RC799-869, cholecystectomy, Percutaneous transhepatic cholangiography, Roux‐en‐Y hepatico‐jejunostomy, Biliary anomalies, medicine, percutaneous transhepatic cholangiography, Magnetic resonance cholangiopancreatography, Hepatology, medicine.diagnostic_test, business.industry, Biliary fistula, Gastroenterology, Original Articles, Diseases of the digestive system. Gastroenterology, medicine.disease, benign biliary stricture, magnetic resonance cholangiopancreatography, Original Article, Cholecystectomy, Radiology, business, BILIARY STONES
Abstract

Background and Aim Accurate anatomical delineation is the key before definitive repair for benign biliary stricture (BBS). The role of percutaneous transhepatic cholangiography (PTC) as a road map is less studied in the era of magnetic resonance cholangiopancreatography (MRCP). Methods A prospective observational study, performed between July 2012 and December 2013. All patients of post‐cholecystectomy BBS were evaluated with MRCP and PTC prior to definitive repair. Findings of MRCP and PTC were compared with intraoperative details. Results Thirty patients with BBS were included in the study. MRCP was performed in all but PTC was amenable in 28 of 30 (93.3%) patients. PTC was comparable to MRCP in diagnosing stricture type (96.4% vs 89.3%), intrahepatic stones (75% vs 75%), and biliary anomalies (95.6% vs 100%). Additionally, PTC revealed internal biliary fistula in 4 (85.7% vs 61.4%; P value 0.04). PTC‐related minor complications were noted in 2 (7.1%) patients. Conclusion PTC is comparable to MRCP in diagnosing the stricture type, intrahepatic biliary stones, and biliary anomalies. Though comparable to MRCP, the authors could not reveal any additional information that could change the course of management in BBS., Magnetic resonance cholangiopancreatography (MRCP) appears to be an optimum preoperative roadmap, as it yielded additional information like collections or intra‐abdominal abscess for deciding the management in benign biliary stricture (BBS). MRCP has been found to be inferior to percutaneous transhepatic cholangiography (PTC) in recognizing internal biliary fistulae. PTC was more in concordance with the intraoperative findings with respect to the type of stricture when compared with MRCP. Though PTC yielded some additional information over MRCP, it could not alter the course of management in BBS.

Published
2021

8. Linking changes in species composition and biomass in a globally distributed grassland experiment

Author

Ladouceur, Emma, Blowes, Shane A, Chase, Jonathan M, Clark, Adam T, Garbowski, Magda, Alberti, Juan, Arnillas, Carlos Alberto, Bakker, Jonathan D, Barrio, Isabel C, Bharath, Siddharth, Borer, Elizabeth T, Brudvig, Lars A, Cadotte, Marc W, Chen, Qingqing, Collins, Scott L, Dickman, Christopher R, Donohue, Ian, Du, Guozhen, Ebeling, Anne, Eisenhauer, Nico, Fay, Philip A, Hagenah, Nicole, Hautier, Yann, Jentsch, Anke, Jónsdóttir, Ingibjörg S, Komatsu, Kimberly, MacDougall, Andrew, Martina, Jason P, Moore, Joslin L, Morgan, John W, Peri, Pablo L, Power, Sally A, Ren, Zhengwei, Risch, Anita C, Roscher, Christiane, Schuchardt, Max A, Seabloom, Eric W, Stevens, Carly J, Veen, G F Ciska, Virtanen, Risto, Wardle, Glenda M, Wilfahrt, Peter A, Harpole, W Stanley, Ladouceur, Emma, Blowes, Shane A, Chase, Jonathan M, Clark, Adam T, Garbowski, Magda, Alberti, Juan, Arnillas, Carlos Alberto, Bakker, Jonathan D, Barrio, Isabel C, Bharath, Siddharth, Borer, Elizabeth T, Brudvig, Lars A, Cadotte, Marc W, Chen, Qingqing, Collins, Scott L, Dickman, Christopher R, Donohue, Ian, Du, Guozhen, Ebeling, Anne, Eisenhauer, Nico, Fay, Philip A, Hagenah, Nicole, Hautier, Yann, Jentsch, Anke, Jónsdóttir, Ingibjörg S, Komatsu, Kimberly, MacDougall, Andrew, Martina, Jason P, Moore, Joslin L, Morgan, John W, Peri, Pablo L, Power, Sally A, Ren, Zhengwei, Risch, Anita C, Roscher, Christiane, Schuchardt, Max A, Seabloom, Eric W, Stevens, Carly J, Veen, G F Ciska, Virtanen, Risto, Wardle, Glenda M, Wilfahrt, Peter A, and Harpole, W Stanley

Abstract

Global change drivers, such as anthropogenic nutrient inputs, are increasing globally. Nutrient deposition simultaneously alters plant biodiversity, species composition and ecosystem processes like aboveground biomass production. These changes are underpinned by species extinction, colonisation and shifting relative abundance. Here, we use the Price equation to quantify and link the contributions of species that are lost, gained or that persist to change in aboveground biomass in 59 experimental grassland sites. Under ambient (control) conditions, compositional and biomass turnover was high, and losses (i.e. local extinctions) were balanced by gains (i.e. colonisation). Under fertilisation, the decline in species richness resulted from increased species loss and decreases in species gained. Biomass increase under fertilisation resulted mostly from species that persist and to a lesser extent from species gained. Drivers of ecological change can interact relatively independently with diversity, composition and ecosystem processes and functions such as aboveground biomass due to the individual contributions of species lost, gained or persisting.

Published
2022

9. Nutrient identity modifies the destabilising effects of eutrophication in grasslands

Author

Carroll, Oliver, Batzer, Evan, Bharath, Siddharth, Borer, Elizabeth T, Campana, Sofía, Esch, Ellen, Hautier, Yann, Ohlert, Timothy, Seabloom, Eric W, Adler, Peter B, Bakker, Jonathan D, Biederman, Lori, Bugalho, Miguel N, Caldeira, Maria, Chen, Qingqing, Davies, Kendi F, Fay, Philip A, Knops, Johannes M H, Komatsu, Kimberly, Martina, Jason P, McCann, Kevin S, Moore, Joslin L, Morgan, John W, Muraina, Taofeek O, Osborne, Brooke, Risch, Anita C, Stevens, Carly, Wilfahrt, Peter A, Yahdjian, Laura, MacDougall, Andrew S, Carroll, Oliver, Batzer, Evan, Bharath, Siddharth, Borer, Elizabeth T, Campana, Sofía, Esch, Ellen, Hautier, Yann, Ohlert, Timothy, Seabloom, Eric W, Adler, Peter B, Bakker, Jonathan D, Biederman, Lori, Bugalho, Miguel N, Caldeira, Maria, Chen, Qingqing, Davies, Kendi F, Fay, Philip A, Knops, Johannes M H, Komatsu, Kimberly, Martina, Jason P, McCann, Kevin S, Moore, Joslin L, Morgan, John W, Muraina, Taofeek O, Osborne, Brooke, Risch, Anita C, Stevens, Carly, Wilfahrt, Peter A, Yahdjian, Laura, and MacDougall, Andrew S

Abstract

Nutrient enrichment can simultaneously increase and destabilise plant biomass production, with co-limitation by multiple nutrients potentially intensifying these effects. Here, we test how factorial additions of nitrogen (N), phosphorus (P) and potassium with essential nutrients (K+) affect the stability (mean/standard deviation) of aboveground biomass in 34 grasslands over 7 years. Destabilisation with fertilisation was prevalent but was driven by single nutrients, not synergistic nutrient interactions. On average, N-based treatments increased mean biomass production by 21-51% but increased its standard deviation by 40-68% and so consistently reduced stability. Adding P increased interannual variability and reduced stability without altering mean biomass, while K+ had no general effects. Declines in stability were largest in the most nutrient-limited grasslands, or where nutrients reduced species richness or intensified species synchrony. We show that nutrients can differentially impact the stability of biomass production, with N and P in particular disproportionately increasing its interannual variability.

Published
2022

10. Nutrient identity modifies the destabilising effects of eutrophication in grasslands

Author

Sub Ecology and Biodiversity, Ecology and Biodiversity, Carroll, Oliver, Batzer, Evan, Bharath, Siddharth, Borer, Elizabeth T, Campana, Sofía, Esch, Ellen, Hautier, Yann, Ohlert, Timothy, Seabloom, Eric W, Adler, Peter B, Bakker, Jonathan D, Biederman, Lori, Bugalho, Miguel N, Caldeira, Maria, Chen, Qingqing, Davies, Kendi F, Fay, Philip A, Knops, Johannes M H, Komatsu, Kimberly, Martina, Jason P, McCann, Kevin S, Moore, Joslin L, Morgan, John W, Muraina, Taofeek O, Osborne, Brooke, Risch, Anita C, Stevens, Carly, Wilfahrt, Peter A, Yahdjian, Laura, MacDougall, Andrew S, Sub Ecology and Biodiversity, Ecology and Biodiversity, Carroll, Oliver, Batzer, Evan, Bharath, Siddharth, Borer, Elizabeth T, Campana, Sofía, Esch, Ellen, Hautier, Yann, Ohlert, Timothy, Seabloom, Eric W, Adler, Peter B, Bakker, Jonathan D, Biederman, Lori, Bugalho, Miguel N, Caldeira, Maria, Chen, Qingqing, Davies, Kendi F, Fay, Philip A, Knops, Johannes M H, Komatsu, Kimberly, Martina, Jason P, McCann, Kevin S, Moore, Joslin L, Morgan, John W, Muraina, Taofeek O, Osborne, Brooke, Risch, Anita C, Stevens, Carly, Wilfahrt, Peter A, Yahdjian, Laura, and MacDougall, Andrew S

Published
2022

11. Linking changes in species composition and biomass in a globally distributed grassland experiment

Author

Sub Ecology and Biodiversity, Ecology and Biodiversity, Ladouceur, Emma, Blowes, Shane A, Chase, Jonathan M, Clark, Adam T, Garbowski, Magda, Alberti, Juan, Arnillas, Carlos Alberto, Bakker, Jonathan D, Barrio, Isabel C, Bharath, Siddharth, Borer, Elizabeth T, Brudvig, Lars A, Cadotte, Marc W, Chen, Qingqing, Collins, Scott L, Dickman, Christopher R, Donohue, Ian, Du, Guozhen, Ebeling, Anne, Eisenhauer, Nico, Fay, Philip A, Hagenah, Nicole, Hautier, Yann, Jentsch, Anke, Jónsdóttir, Ingibjörg S, Komatsu, Kimberly, MacDougall, Andrew, Martina, Jason P, Moore, Joslin L, Morgan, John W, Peri, Pablo L, Power, Sally A, Ren, Zhengwei, Risch, Anita C, Roscher, Christiane, Schuchardt, Max A, Seabloom, Eric W, Stevens, Carly J, Veen, G F Ciska, Virtanen, Risto, Wardle, Glenda M, Wilfahrt, Peter A, Harpole, W Stanley, Sub Ecology and Biodiversity, Ecology and Biodiversity, Ladouceur, Emma, Blowes, Shane A, Chase, Jonathan M, Clark, Adam T, Garbowski, Magda, Alberti, Juan, Arnillas, Carlos Alberto, Bakker, Jonathan D, Barrio, Isabel C, Bharath, Siddharth, Borer, Elizabeth T, Brudvig, Lars A, Cadotte, Marc W, Chen, Qingqing, Collins, Scott L, Dickman, Christopher R, Donohue, Ian, Du, Guozhen, Ebeling, Anne, Eisenhauer, Nico, Fay, Philip A, Hagenah, Nicole, Hautier, Yann, Jentsch, Anke, Jónsdóttir, Ingibjörg S, Komatsu, Kimberly, MacDougall, Andrew, Martina, Jason P, Moore, Joslin L, Morgan, John W, Peri, Pablo L, Power, Sally A, Ren, Zhengwei, Risch, Anita C, Roscher, Christiane, Schuchardt, Max A, Seabloom, Eric W, Stevens, Carly J, Veen, G F Ciska, Virtanen, Risto, Wardle, Glenda M, Wilfahrt, Peter A, and Harpole, W Stanley

Published
2022

12. Linking changes in species composition and biomass in a globally distributed grassland experiment

Author

Ladeuceur, E, Blowes, S, Chase, J, Clark, A., Grabowski, M, Alberti, Juan, Arnillas, C.A., Bharath, Siddharth, Borer, E.T., Brudvig, Lars A., Cadotte, Marc, Chen, Q.Q., Collins, Scott, Dickman, C. R., Donohue, C, Du, GZ, Ebling, A, Eisenhauer, N., Fay, P.A., Hagenah, N., Hautier, Y., Anke, J, Jonsottir, I.S., Komatsu, K.J., MacDougall, A.S., Martina, J.P., Moore, J., Morgan, J., Peri, Paolo, Power, S.A., Zhengwei, R, Risch, A., Roscher, C., Schuchardt, C, Seabloom, Eric W., Stevens, Carly, Veen, C, Virtanen, R, Wardle, Glenda M., Wilfahrt, P.A., Harpole, W.S., Ladeuceur, E, Blowes, S, Chase, J, Clark, A., Grabowski, M, Alberti, Juan, Arnillas, C.A., Bharath, Siddharth, Borer, E.T., Brudvig, Lars A., Cadotte, Marc, Chen, Q.Q., Collins, Scott, Dickman, C. R., Donohue, C, Du, GZ, Ebling, A, Eisenhauer, N., Fay, P.A., Hagenah, N., Hautier, Y., Anke, J, Jonsottir, I.S., Komatsu, K.J., MacDougall, A.S., Martina, J.P., Moore, J., Morgan, J., Peri, Paolo, Power, S.A., Zhengwei, R, Risch, A., Roscher, C., Schuchardt, C, Seabloom, Eric W., Stevens, Carly, Veen, C, Virtanen, R, Wardle, Glenda M., Wilfahrt, P.A., and Harpole, W.S.

Published
2022

13. Species losses, gains, and changes in persistent species are associated with distinct effects on ecosystem functioning in global grasslands

Author

Ladouceur, Emma, primary, Blowes, Shane, additional, Chase, Jonathan, additional, Clark, Adam, additional, Garbowski, Magda, additional, Alberti, Juan, additional, Arnillas, Carlos, additional, Bakker, Jonathan, additional, Barrio, Isabel C., additional, Bharath, Siddharth, additional, Borer, Elizabeth, additional, Brudvig, Lars, additional, Cadotte, Marc, additional, Chen, Q. Q., additional, Collins, Scott, additional, Dickman, Christopher, additional, Donohue, Ian, additional, Du, Guo-Zhen, additional, Ebeling, Anne, additional, Eisenhauer, Nico, additional, Fay, Philip, additional, Hagenah, Nicole, additional, Hautier, Yann, additional, Jentsch, Anke, additional, Jónsdóttir, Ingibjörg Svala, additional, Komatsu, Kimberly, additional, MacDougall, Andrew, additional, Martina, Jason, additional, Moore, Joslin, additional, Morgan, John, additional, Peri, Pablo, additional, Power, Sally A, additional, Ren, Zhengwei, additional, Risch, Anita, additional, Roscher, Christiane, additional, Schuchardt, Max, additional, Seabloom, Eric, additional, Stevens, Carly, additional, Veen, Ciska, additional, Virtanen, Risto, additional, Wardle, Glenda, additional, Wilfahrt, Peter, additional, and Harpole, Stan, additional

Published
2022
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14. Nutrient identity modifies the destabilising effects of eutrophication in grasslands

Author

Carroll, Oliver, primary, Batzer, Evan, additional, Bharath, Siddharth, additional, Borer, Elizabeth T., additional, Campana, Sofía, additional, Esch, Ellen, additional, Hautier, Yann, additional, Ohlert, Timothy, additional, Seabloom, Eric W., additional, Adler, Peter B., additional, Bakker, Jonathan D., additional, Biederman, Lori, additional, Bugalho, Miguel N., additional, Caldeira, Maria, additional, Chen, Qingqing, additional, Davies, Kendi F., additional, Fay, Philip A., additional, Knops, Johannes M. H., additional, Komatsu, Kimberly, additional, Martina, Jason P., additional, McCann, Kevin S., additional, Moore, Joslin L., additional, Morgan, John W., additional, Muraina, Taofeek O., additional, Osborne, Brooke, additional, Risch, Anita C., additional, Stevens, Carly, additional, Wilfahrt, Peter A., additional, Yahdjian, Laura, additional, and MacDougall, Andrew S., additional

Published
2021
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15. Fertilized graminoids intensify negative drought effects on grassland productivity

Author

Van Sundert, Kevin, primary, Arfin Khan, Mohammed A. S., additional, Bharath, Siddharth, additional, Buckley, Yvonne M., additional, Caldeira, Maria C., additional, Donohue, Ian, additional, Dubbert, Maren, additional, Ebeling, Anne, additional, Eisenhauer, Nico, additional, Eskelinen, Anu, additional, Finn, Alain, additional, Gebauer, Tobias, additional, Haider, Sylvia, additional, Hansart, Amandine, additional, Jentsch, Anke, additional, Kübert, Angelika, additional, Nijs, Ivan, additional, Nock, Charles A., additional, Nogueira, Carla, additional, Porath‐Krause, Anita J., additional, Radujković, Dajana, additional, Raynaud, Xavier, additional, Risch, Anita C., additional, Roscher, Christiane, additional, Scherer‐Lorenzen, Michael, additional, Schuchardt, Max A., additional, Schütz, Martin, additional, Siebert, Julia, additional, Sitters, Judith, additional, Spohn, Marie, additional, Virtanen, Risto, additional, Werner, Christiane, additional, Wilfahrt, Peter, additional, and Vicca, Sara, additional

Published
2021
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16. Multiple resource limitations explain biomass-precipitation relationships in grasslands

Author

Bharath, Siddharth, primary, Adler, Peter B., additional, Fay, Philip A., additional, Seabloom, Eric W., additional, Hautier, Yann, additional, Biederman, Lori, additional, Bugalho, Miguel N., additional, Caldeira, Maria, additional, Eskelinen, Anu, additional, Knops, Johannes M.H., additional, McCulley, Rebecca, additional, Morgan, John, additional, Power, Sally A, additional, Risch, Anita C., additional, Schuetz, Martin, additional, Stevens, Carly J., additional, Ohlert, Timothy, additional, Virtanen, Risto, additional, and Borer, Elizabeth T., additional

Published
2021
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17. Nutrient identity modifies the destabilising effects of eutrophication in grasslands.

Author

Carroll O, Batzer E, Bharath S, Borer ET, Campana S, Esch E, Hautier Y, Ohlert T, Seabloom EW, Adler PB, Bakker JD, Biederman L, Bugalho MN, Caldeira M, Chen Q, Davies KF, Fay PA, Knops JMH, Komatsu K, Martina JP, McCann KS, Moore JL, Morgan JW, Muraina TO, Osborne B, Risch AC, Stevens C, Wilfahrt PA, Yahdjian L, and MacDougall AS

Subjects
Biodiversity, Biomass, Eutrophication, Nitrogen, Nutrients, Ecosystem, Grassland
Abstract

Nutrient enrichment can simultaneously increase and destabilise plant biomass production, with co-limitation by multiple nutrients potentially intensifying these effects. Here, we test how factorial additions of nitrogen (N), phosphorus (P) and potassium with essential nutrients (K+) affect the stability (mean/standard deviation) of aboveground biomass in 34 grasslands over 7 years. Destabilisation with fertilisation was prevalent but was driven by single nutrients, not synergistic nutrient interactions. On average, N-based treatments increased mean biomass production by 21-51% but increased its standard deviation by 40-68% and so consistently reduced stability. Adding P increased interannual variability and reduced stability without altering mean biomass, while K+ had no general effects. Declines in stability were largest in the most nutrient-limited grasslands, or where nutrients reduced species richness or intensified species synchrony. We show that nutrients can differentially impact the stability of biomass production, with N and P in particular disproportionately increasing its interannual variability., (© 2021 John Wiley & Sons Ltd.)

Published
2022
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