Data from: Isotopic evidence for oligotrophication of terrestrial ecosystems

Craine, Joseph M.; Elmore, Andrew J.; Wang, Lixin; Aranibar, Julieta N.; Bauters, Marijn; Boeckx, Pascal; Crowley, Brooke E.; Dawes, Melissa A.; Delzon, Sylvain; Fajardo, Alex; Fang, Yunting; Fujiyoshi, Lei; Gray, Alan; Guerrieri, Rossella; Gundale, Michael J.; Hawke, David J.; Hietz, Peter; Jonard, Mathieu; Tanaka, Kenzö; Макаров, М. И.; Sarà, Maurizio; McGlynn, Terrence P.; McNeil, Brenden E.; Mosher, Stella G.; Nelson, David M.; Peri, Pablo Luís; Roggy, Jean Christophe; Sanders‐DeMott, Rebecca; Song, Minghua; Szpak, Paul; Templer, Pamela H.; Colff, Dewidine Van der; Werner, Christiane; Xu, Xingliang; Yang, Yang; Yu, Guirui; Zmudczyńska-Skarbek, Katarzyna

doi:10.5061/dryad.v2k2607

Cited by 1 publication

(2 citation statements)

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“…We extracted foliar d 15 N and [N] data from Craine et al (2018) (Craine et al, 2019), in which each d 15 N and [N] value represents an average for a given species at a given site (defined by 0.1°l atitude/longitude or c. 11 km) in 1 yr. We subsampled this data to only include EM and AM plants in the United States (n = 2138: n EM = 845, n AM = 1293, n species = 299). While we were initially only interested in trees, data from AM trees were far less abundant than EM trees, resulting in an imbalanced dataset.…”

Section: Spatial Foliar D 15 N Analysis: Data Compilationmentioning

confidence: 99%

“…Specifically, we tested whether (1) plant and fungal N concentrations and d 15 N declined in an area experiencing CO 2 rise and increasing N deposition and (2) trajectories of plant d 15 N and N concentrations diverged by mycorrhizal type. We also analyzed a subset of previously published foliar d 15 N values (Craine et al, 2019) to parse the effects of CO 2 rise, N deposition, and mycorrhizal controls of d 15 N. In this second dataset, we tested the extent to which (1) CO 2 rise or N deposition explains declines in foliar d 15 N and (2) d 15 N trajectories diverged by mycorrhizal type with CO 2 rise or N deposition.…”

Section: Introductionmentioning

confidence: 99%

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Herbarium specimens reveal that mycorrhizal type does not mediate declining temperate tree nitrogen status over a century of environmental change

Michaud,

Cline,

Hobbie

et al. 2023

New Phytologist

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Summary Rising atmospheric carbon dioxide concentrations (CO2) and atmospheric nitrogen (N) deposition have contrasting effects on ectomycorrhizal (EM) and arbuscular mycorrhizal (AM) symbioses, potentially mediating forest responses to environmental change. In this study, we evaluated the cumulative effects of historical environmental change on N concentrations and δ15N values in AM plants, EM plants, EM fungi, and saprotrophic fungi using herbarium specimens collected in Minnesota, USA from 1871 to 2016. To better understand mycorrhizal mediation of foliar δ15N, we also analyzed a subset of previously published foliar δ15N values from across the United States to parse the effects of N deposition and CO2 rise. Over the last century in Minnesota, N concentrations declined among all groups except saprotrophic fungi. δ15N also declined among all groups of plants and fungi; however, foliar δ15N declined less in EM plants than in AM plants. In the analysis of previously published foliar δ15N values, this slope difference between EM and AM plants was better explained by nitrogen deposition than by CO2 rise. Mycorrhizal type did not explain trajectories of plant N concentrations. Instead, plants and EM fungi exhibited similar declines in N concentrations, consistent with declining forest N status despite moderate levels of N deposition.

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Section: Spatial Foliar D 15 N Analysis: Data Compilationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%