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Additional Information

Competing Interests

The authors declare they have no competing interests.

Author Contributions

Edison A. Díaz-Álvarez conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Roberto Lindig-Cisneros conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper, closely supervised the plant nutrition portion of the experiments.

Casandra Reyes-García conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper, adviced and supervised on the stable isotopes portion of the study.

Erick de la Barrera conceived and designed the experiments, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Field Study Permissions

The following information was supplied relating to field study approvals (i.e., approving body and any reference numbers):

Institutional botanical collection permit of the Centro de Investigaciones en Ecosistemas issued by Mexico's Secretaría de Medio Ambiente y Recursos Naturales (Oficio SGPA/DGGFS/712/2767/14).

Funding

This work was funded by the Dirección General del Personal Académico, UNAM an institutional funds of Centro de Investigaciones en Ecosistemas, UNAM. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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