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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Marco A. Molina-Montenegro conceived and designed the experiments, performed the experiments, authored or reviewed drafts of the paper, approved the final draft, final edition of draft.

Gabriel I. Ballesteros analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft, final edition of draft.

Eduardo Castro-Nallar conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft, final edition of draft.

Claudio Meneses conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Cristian Torres-Díaz analyzed the data, contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Jorge Gallardo-Cerda conceived and designed the experiments, performed the experiments, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Field Study Permissions

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

Instituto Antártico Chileno (INACH) provided authorization to collect sample of plant and soil in Antarctic territory.

Data Deposition

The following information was supplied regarding data availability:

All supplementary material (both figures and tables) are available at: https://figshare.com/s/5d7961c1859f33067dab

Funding

This work was supported by FONDECYT grant 3160333, PII20150126 and FONDECYT 11160905. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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