Dear Constance Choquel and Co-Workers,

thank you for submitting your responses to the reviewers. Both official as well as the external reviewer highly value your research and found only minor modifications necessary. I agree with this evaluation.

However, all three reviewers expressed one major concern, which is the the categorization of Nonionella as an invasive species. It seems your data are not sufficient to make such a statement. I therefore have to request that you remove the term "Invasive" and exchange it by the term "Non-Indigenous". I see no problem with this change for the outcome of your study. I also find your suggested new title appropriate.

I further sympathize with the comment of one reviewer to include Table S1 into the main manuscript. The data appear to be crucial to the study.

From your responses to the reviewers it is sometimes not clear to me how you plan to implement changes into your manuscript. I will assume that all requested information and clarification will find its way into the revised version.

Please be invited to submit your revised manuscript. Please highlight all implemented changes (e.g. via track changes or with a marker) in the manuscript.

Let me know in case you have any questions.
All the best
Tina Treude

Dear Constance Choquel and Co-workers,

scientifically I am very pleased with your revision. However, the English language is in part awkward and needs editing. Some sentences are incomplete or finish very abruptly. There is also some overuse of "thus".

I recommend that you let a native English speaker read over the manuscript to smoothen the sentences. I marked the most critical parts in pink in the attached file.

Please also remove the weblink in line 114 and replace it by a permanent source (citation or DOI). Weblinks are not permanent.

These adaptations are only of technical nature, but I selected "minor revision", to be able to read over your manuscript one more time before it goes to our production team for publication.

Let me know in case you have any questions.
Alle the best
Tina Treude