Browsing Research Articles (University of Pretoria) by UP Author "Hagenah, Nicole"

Browsing Research Articles (University of Pretoria) by UP Author "Hagenah, Nicole"

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  • Belowground biomass response to nutrient enrichment depends on light limitation across globally distributed grasslands 
    Cleland, Elsa E.; Lind, Eric M.; DeCrappeo, Nicole M.; DeLorenze, Elizabeth; Wilkins, Rachel Abbott; Adler, Peter B.; Bakker, Jonathan D.; Brown, Cynthia S.; Davies, Kendi F.; Esch, Ellen; Firn, Jennifer; Gressard, Scott; Gruner, Daniel S.; Hagenah, Nicole; Harpole, W. Stanley; Hautier, Yann; Hobbie, Sarah E.; Hofmockel, Kirsten S.; Kirkman, Kevin; Knops, Johannes M.H.; Kopp, Christopher W.; La Pierre, Kimberly J.; MacDougall, Andrew; McCulley, Rebecca L.; Melbourne, Brett A.; Moore, Joslin L.; Prober, Suzanne M.; Riggs, Charlotte; Risch, Anita C.; Schuetz, Martin; Stevens, Carly; Wragg, Peter D.; Wright, Justin; Borer, Elizabeth T. (Springer, 2019-11)
    Anthropogenic activities are increasing nutrient inputs to ecosystems worldwide, with consequences for global carbon and nutrient cycles. Recent meta-analyses show that aboveground primary production is often co-limited ...
  • A comprehensive profile of reproductive hormones in eusocial Damaraland mole-rats (Fukomys damarensis) 
    Wallace, Kyra Mary Elizabeth; Hart, Daniel William; Hagenah, Nicole; Ganswindt, Andre; Bennett, Nigel Charles (Elsevier, 2023-03)
    In species where sociality and group cohesion are primarily determined by the maintenance of a reproductive division of labour and cooperative behaviours, the eusocial Damaraland mole-rat (Fukomys damarensis) presents a ...
  • Dominant native and non-native graminoids differ in key leaf traits irrespective of nutrient availability 
    Broadbent, Arthur A.D.; Firn, Jennifer; McGree, James M.; Borer, Elizabeth T.; Buckley, Yvonne M.; Harpole, W. Stanley; Komatsu, Kimberly J.; MacDougall, Andrew S.; Orwin, Kate H.; Ostle, Nicholas J.; Seabloom, Eric W.; Bakker, Jonathan D.; Biederman, Lori; Caldeira, Maria C.; Eisenhauer, Nico; Hagenah, Nicole; Hautier, Yann; Moore, Joslin L.; Nogueira, Carla; Peri, Pablo L.; Risch, Anita C.; Roscher, Christiane; Schutz, Martin; Stevens, Carly J. (Wiley, 2020-07)
    AIM : Nutrient enrichment is associated with plant invasions and biodiversity loss. Functional trait advantages may predict the ascendancy of invasive plants following nutrient enrichment but this is rarely tested. Here, ...
  • Effect of colony disruption and social isolation on naked mole-rat endocrine correlates 
    Blecher, Arantxa Silvia; Bennett, Nigel Charles; Medger, Katarina; Hagenah, Nicole; Ganswindt, Andre; Oosthuizen, Maria Kathleen (Elsevier, 2020-09)
    The social environment of animals can have profound implications on their behaviour and physiology. Naked mole-rats (Heterocephalus glaber) are highly social with complex dominance hierarchies that influence both stress- ...
  • The endocrine control of reproductive suppression in an aseasonally breeding social subterranean rodent, the Mahali mole-rat (Cryptomys hottentotus mahali) 
    Hart, Daniel William; Janse van Vuuren, Andries Koch; Erasmus, Andine; Suess, Tobias; Hagenah, Nicole; Hagenah, Nicole; Ganswindt, Andre; Bennett, Nigel Charles (Elsevier, 2022-06)
    Cooperative behaviour, sociality and reproductive suppression in African mole-rats have been extensively studied. Nevertheless, endocrine correlates of some species of social mole-rats have been neglected, and these species ...
  • Herbivory and eutrophication mediate grassland plant nutrient responses across a global climatic gradient 
    Anderson, T. Michael; Griffith, Daniel M.; Grace, James B.; Lind, Eric M.; Adler, Peter B.; Biederman, Lori A.; Blumenthal, Dana M.; Daleo, Pedro; Firn, Jennifer; Hagenah, Nicole; Harpole, W. Stanley; MacDougall, Andrew S.; McCulley, Rebecca L.; Prober, Suzanne M.; Risch, Anita C.; Sankaran, Mahesh; Schutz, Martin; Seabloom, Eric W.; Stevens, Carly J.; Sullivan, Lauren L.; Wragg, Peter D.; Borer, Elizabeth T. (Ecological Society of America, 2018-04)
    Plant stoichiometry, the relative concentration of elements, is a key regulator of ecosystem functioning and is also being altered by human activities. In this paper we sought to understand the global drivers of plant ...
  • Increasing effects of chronic nutrient enrichment on plant diversity loss and ecosystem productivity over time 
    Seabloom, E.W.; Adler, P.B.; Alberti, J.; Biederman, L.; Buckley, Y.M.; Cadotte, M.W.; Collins, S.L.; Dee, L.; Fay, P.A.; Firn, J.; Hagenah, Nicole; Harpole, W.S.; Hautier, Y.; Hector, A.; Hobbie, S.E.; Isbell, F.; Knops, Johannes M.H.; Komatsu, K.J.; Laungani, R.; MacDougall, A.; McCulley, R.L.; Moore, J.L.; Morgan, J.W.; Ohlert, T.; Prober, S.M.; Risch, A.C.; Schuetz, M.; Stevens, C.J.; Borer, Elizabeth T. (Ecological Society of America, 2021-02)
    Human activities are enriching many of Earth’s ecosystems with biologically limiting mineral nutrients such as nitrogen (N) and phosphorus (P). In grasslands, this enrichment generally reduces plant diversity and increases ...
  • Leaf nutrients, not specific leaf area, are consistent indicators of elevated nutrient inputs 
    Firn, Jennifer; McGree, James M.; Harvey, Eric; Flores-Moreno, Habacuc; Schütz, Martin; Buckley, Yvonne M.; Borer, Elizabeth T.; Seabloom, Eric W.; La Pierre, Kimberly J.; MacDougall, Andrew M.; Prober, Suzanne M.; Stevens, Carly J.; Sullivan, Lauren L.; Porter, Erica; Ladouceur, Emma; Allen, Charlotte; Moromizato, Karine H.; Morgan, John W.; Harpole, W. Stanley; Hautier, Yann; Eisenhauer, Nico; Wright, Justin P.; Adler, Peter B.; Arnillas, Carlos Alberto; Bakker, Jonathan D.; Biederman, Lori; Broadbent, Arthur A.D.; Brown, Cynthia S.; Bugalho, Miguel N.; Caldeira, Maria C.; Cleland, Elsa E.; Ebeling, Anne; Fay, Philip A.; Hagenah, Nicole; Kleinhesselink, Andrew R.; Mitchell, Rachel; Moore, Joslin L.; Nogueira, Carla; Peri, Pablo Luis; Roscher, Christiane; Smith, Melinda D.; Wragg, Peter D.; Risch, Anita C. (Nature Research, 2019-02)
    Leaf traits are frequently measured in ecology to provide a ‘common currency’ for predicting how anthropogenic pressures impact ecosystem function. Here, we test whether leaf traits consistently respond to experimental ...
  • Linking changes in species composition and biomass in a globally distributed grassland experiment 
    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; 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; Jonsdottir, Ingibjorg S.; Komatsu, Kimberly J.; 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 (Wiley, 2022-12)
    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 ...
  • Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide 
    Tognetti, Pedro M.; Prober, Suzanne M.; Baez, Selene; Chaneton, Enrique J.; Firn, Jennifer; Risch, Anita C.; Schuetz, Martin; Simonsen, Anna K.; Yahdjian, Laura; Borer, Elizabeth; Seabloom, Eric W.; Arnillas, Carlos Alberto; Bakker, Jonathan D.; Brown, Cynthia S.; Cadotte, Marc W.; Caldeira, Maria C.; Daleo, Pedro; Dwyer, John M.; Fay, Philip A.; Gherardi, Laureano A.; Hagenah, Nicole; Hautier, Yann; Komatsu, Kimberly J.; McCulley, Rebecca L.; Price, Jodi N.; Standish, Rachel J.; Stevens, Carly J.; Wragg, Peter D.; Sankaran, Mahesh (National Academy of Sciences, 2021-07)
    Anthropogenic nutrient enrichment is driving global biodiversity decline and modifying ecosystem functions. Theory suggests that plant functional types that fix atmospheric nitrogen have a competitive advantage in nitrogen-poor ...
  • Nutrient addition drives declines in grassland species richness primarily via enhanced species loss 
    Muehleisen, Andrew J.; Watkins, Carmen R.E.; Altmire, Gabriella R.; Shaw, E. Ashley; Case, Madelon F.; Aoyama, Lina; Brambila, Alejandro; Reed, Paul B.; LaForgia, Marina; Borer, Elizabeth; Seabloom, Eric W.; Bakker, Jonathan D.; Amillas, Carlos Alberto; Biederman, Lori; Chen, Qingqing; Cleland, Elsa E.; Fay, Philip A.; Hagenah, Nicole; Harpole, Stan; Hautier, Yann; Henning, Jeremiah A.; Knops, Johannes M.H.; Komatsu, Kimberly J.; Ladouceur, Emma; MacDougall, Andrew; McCulley, Rebecca L.; Moore, Joslin L.; Ohlert, Tim; Power, Sally A.; Stevens, Carly J.; Wilfahrt, Peter A.; Hallett, Lauren M. (Wiley, 2023-03)
    Declines in grassland diversity in response to nutrient addition are a general consequence of global change. This decline in species richness may be driven by multiple underlying processes operating at different time-scales. ...
  • Nutrient availability controls the impact of mammalian herbivores on soil carbon and nitrogen pools in grasslands 
    Sitters, Judith; Wubs, E.R. Jasper; Bakker, Elisabeth S.; Crowther, Thomas W.; Adler, Peter B.; Bagchi, Sumanta; Bakker, Jonathan D.; Biederman, Lori.; Borer, Elizabeth T.; Cleland, Elsa E.; Eisenhauer, Nico; Firn, Jennifer; Gherardi, Laureano; Hagenah, Nicole; Hautier, Yann; Hobbie, Sarah E.; Knops, Johannes M.H.; MacDougall, Andrew S.; McCulley, Rebecca L.; Moore, Joslin L.; Mortensen, Brent; Peri, Pablo L.; Prober, Suzanne M.; Riggs, Charlotte; Risch, Anita C.; Schütz, Martin; Seabloom, Eric W.; Siebert, Julia; Stevens, Carly J.; Veen, G. F. (Ciska) (Wiley, 2020-04)
    Grasslands are subject to considerable alteration due to human activities globally, including widespread changes in populations and composition of large mammalian herbivores and elevated supply of nutrients. Grassland ...
  • Nutrient enrichment increases invertebrate herbivory and pathogen damage in grasslands 
    Ebeling, Anne; Strauss, Alex T.; Adler, Peter B.; Arnillas, Carlos A.; Barrio, Isabel C.; Biederman, Lori A.; Borer, Elizabeth T.; Bugalho, Miguel N.; Caldeira, Maria C.; Cadotte, Marc W.; Daleo, Pedro; Eisenhauer, Nico; Eskelinen, Anu; Fay, Philip A.; Firn, Jennifer; Graff, Pamela; Hagenah, Nicole; Haider, Sylvia; Komatsu, Kimberly J.; McCulley, Rebecca L.; Mitchell, Charles E.; Moore, Joslin L.; Pascual, Jesus; Peri, Pablo L.; Power, Sally A.; Prober, Suzanne M.; Risch, Anita C.; Roscher, Christiane; Sankaran, Mahesh; Seabloom, Eric W.; Schielzeth, Holger; Schuetz, Martin; Speziale, Karina L.; Tedder, Michelle; Virtanen, Risto; Blumenthal, Dana M. (Wiley, 2022-02)
    Plant damage by invertebrate herbivores and pathogens influences the dynamics of grassland ecosystems, but anthropogenic changes in nitrogen and phosphorus availability can modify these relationships. Using a globally ...
  • Opposing community assembly patterns for dominant and nondominant plant species in herbaceous ecosystems globally 
    Arnillas, Carlos Alberto; Borer, Elizabeth; Seabloom, Eric W.; Alberti, Juan; Baez, Selene; Bakker, Jonathon; Boughton, Elizabeth; Buckley, Yvonne; Bugalho, Miguel Nuno; Donohue, Ian; Dwyer, John; Eskelinen, Anu; Firn, Jennifer; Gridzak, Riley; Hagenah, Nicole; Hautier, Yann; Helm, Aveliina; Jentsch, Anke; Knops, Johannes M.H.; Komatsu, Kimberly J.; Laanisto, Lauri; Laungani, Ramesh; McCulley, Rebecca L.; Moore, Joslin L.; Morgan, John; Peri, Pablo Luis; Power, Sally A.; Price, Jodi; Sankaran, Mahesh; Schamp, Brandon; Speziale, Karina L.; Standish, Rachel; Virtanen, Risto; Cadotte, Marc W. (Wiley Open Access, 2021-12)
    Biotic and abiotic factors interact with dominant plants—the locally most frequent or with the largest coverage—and nondominant plants differently, partially because dominant plants modify the environment where nondominant ...
  • Soil net nitrogen mineralisation across global grasslands 
    Risch, A.C.; Zimmermann, S.; Ochoa-Hueso, R.; Schutz, M.; Frey, Beat; Firn, J.L.; Fay, P.A.; Hagedorn, F.; Borer, E.T.; Seabloom, E.W.; Harpole, W.S.; Knops, Johannes M.H.; McCulley, R.L.; Broadbent, A.A.D.; Stevens, C.J.; Silveira, M.L.; Adler, P.B.; Baez, S.; Biederman, L.A.; Blair, J.M.; Brown, C.S.; Caldeira, M.C.; Collins, S.L.; Daleo, P.; Di Virgilio, A.; Ebeling, A.; Eisenhauer, N.; Esch, E.; Eskelinen, A.; Hagenah, Nicole; Hautier, Y.; Kirkman, K.P.; MacDougall, A.S.; Moore, J.L.; Power, S.A.; Prober, S.M.; Roscher, C.; Sankaran, M.; Siebert, J.; Speziale, K.L.; Tognetti, P.M.; Virtanen, R.; Yahdjian, L.; Moser, B. (Nature Research, 2019-10)
    Soil nitrogen mineralisation (Nmin), the conversion of organic into inorganic N, is important for productivity and nutrient cycling. The balance between mineralisation and immobilisation (net Nmin) varies with soil ...