Nothing lasts forever: Dominant species decline under rapid environmental change in global grasslands
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In: Journal of Ecology, Vol. 111, No. 11, 11.2023, p. 2472-2482.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Nothing lasts forever: Dominant species decline under rapid environmental change in global grasslands
AU - Wilfahrt, Peter A.
AU - Seabloom, Eric W.
AU - Bakker, Jonathan D.
AU - Biederman, Lori
AU - Bugalho, Miguel N.
AU - Cadotte, Marc W.
AU - Caldeira, Maria C.
AU - Catford, Jane A.
AU - Chen, Qingqing
AU - Donohue, Ian
AU - Ebeling, Anne
AU - Eisenhauer, Nico
AU - Haider, Sylvia
AU - Heckman, Robert W.
AU - Jentsch, Anke
AU - Koerner, Sally E.
AU - Komatsu, Kimberly J.
AU - Laungani, Ramesh
AU - MacDougall, Andrew
AU - Martina, Jason P.
AU - Martinson, Holly
AU - Moore, Joslin L.
AU - Niu, Yujie
AU - Ohlert, Timothy
AU - Venterink, Harry Olde
AU - Orr, Devyn
AU - Peri, Pablo
AU - Pos, Edwin
AU - Price, Jodi
AU - Raynaud, Xavier
AU - Ren, Zhengwei
AU - Roscher, Christiane
AU - Smith, Nicholas G.
AU - Stevens, Carly J.
AU - Sullivan, Lauren L.
AU - Tedder, Michelle
AU - Tognetti, Pedro M.
AU - Veen, Ciska
AU - Wheeler, George
AU - Young, Alyssa L.
AU - Young, Hillary
AU - Borer, Elizabeth T.
N1 - Publisher Copyright: © 2023 The Authors. Journal of Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society.
PY - 2023/11
Y1 - 2023/11
N2 - Dominance often indicates one or a few species being best suited for resource capture and retention in a given environment. Press perturbations that change availability of limiting resources can restructure competitive hierarchies, allowing new species to capture or retain resources and leaving once dominant species fated to decline. However, dominant species may maintain high abundances even when their new environments no longer favour them due to stochastic processes associated with their high abundance, impeding deterministic processes that would otherwise diminish them. Here, we quantify the persistence of dominance by tracking the rate of decline in dominant species at 90 globally distributed grassland sites under experimentally elevated soil nutrient supply and reduced vertebrate consumer pressure. We found that chronic experimental nutrient addition and vertebrate exclusion caused certain subsets of species to lose dominance more quickly than in control plots. In control plots, perennial species and species with high initial cover maintained dominance for longer than annual species and those with low initial cover respectively. In fertilized plots, species with high initial cover maintained dominance at similar rates to control plots, while those with lower initial cover lost dominance even faster than similar species in controls. High initial cover increased the estimated time to dominance loss more strongly in plots with vertebrate exclosures than in controls. Vertebrate exclosures caused a slight decrease in the persistence of dominance for perennials, while fertilization brought perennials' rate of dominance loss in line with those of annuals. Annual species lost dominance at similar rates regardless of treatments. Synthesis. Collectively, these results point to a strong role of a species' historical abundance in maintaining dominance following environmental perturbations. Because dominant species play an outsized role in driving ecosystem processes, their ability to remain dominant—regardless of environmental conditions—is critical to anticipating expected rates of change in the structure and function of grasslands. Species that maintain dominance while no longer competitively favoured following press perturbations due to their historical abundances may result in community compositions that do not maximize resource capture, a key process of system responses to global change.
AB - Dominance often indicates one or a few species being best suited for resource capture and retention in a given environment. Press perturbations that change availability of limiting resources can restructure competitive hierarchies, allowing new species to capture or retain resources and leaving once dominant species fated to decline. However, dominant species may maintain high abundances even when their new environments no longer favour them due to stochastic processes associated with their high abundance, impeding deterministic processes that would otherwise diminish them. Here, we quantify the persistence of dominance by tracking the rate of decline in dominant species at 90 globally distributed grassland sites under experimentally elevated soil nutrient supply and reduced vertebrate consumer pressure. We found that chronic experimental nutrient addition and vertebrate exclusion caused certain subsets of species to lose dominance more quickly than in control plots. In control plots, perennial species and species with high initial cover maintained dominance for longer than annual species and those with low initial cover respectively. In fertilized plots, species with high initial cover maintained dominance at similar rates to control plots, while those with lower initial cover lost dominance even faster than similar species in controls. High initial cover increased the estimated time to dominance loss more strongly in plots with vertebrate exclosures than in controls. Vertebrate exclosures caused a slight decrease in the persistence of dominance for perennials, while fertilization brought perennials' rate of dominance loss in line with those of annuals. Annual species lost dominance at similar rates regardless of treatments. Synthesis. Collectively, these results point to a strong role of a species' historical abundance in maintaining dominance following environmental perturbations. Because dominant species play an outsized role in driving ecosystem processes, their ability to remain dominant—regardless of environmental conditions—is critical to anticipating expected rates of change in the structure and function of grasslands. Species that maintain dominance while no longer competitively favoured following press perturbations due to their historical abundances may result in community compositions that do not maximize resource capture, a key process of system responses to global change.
KW - determinants of plant community diversity and structure
KW - dominance
KW - fertilization
KW - global change ecology
KW - historical contigency
KW - plant population and community dynamics
KW - plant–herbivore interactions
KW - Biology
UR - http://www.scopus.com/inward/record.url?scp=85171849575&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/dcdbe0d9-6281-34c4-9b16-e26b926c6387/
U2 - 10.1111/1365-2745.14198
DO - 10.1111/1365-2745.14198
M3 - Journal articles
AN - SCOPUS:85171849575
VL - 111
SP - 2472
EP - 2482
JO - Journal of Ecology
JF - Journal of Ecology
SN - 0022-0477
IS - 11
ER -