Peer Review History

Original SubmissionNovember 15, 2021
Decision Letter - Juan J Loor, Editor
Transfer Alert

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PONE-D-21-36303Daily feeding rhythm linked to microbiome composition in two zooplankton speciesPLOS ONE

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PLOS ONE

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: The original research presented by this group investigating the links between biological rhythms, feeding behaviors and microbial composition in Daphnia models was incredibly novel and interesting. While the data show that Daphnia species have daily differences in microbial composition that is directly related to feeding behavior, I have a few questions regarding some the statistical analyses.

In a Materials and Methods subsection titled "Sequence analysis, visualization and statistics", authors describe the use of individual t-test on amplicon sequence variants to examine taxa across time points. In many cases, the use of t-test on high-dimensional data can leave room for major error. If possible, can authors please answer the following question: Were there adjustments for p values and false discovery rates? Are there other studies that have used individual t-test to compare ASVs?

The Results and Discussion sections were well written and easy to follow. I appreciated the authors describing how the taxa affected during feeding phases may be involved in different metabolic processes. This also leaves room for deeper analysis and the development of future circadian rhythm-microbiome studies in other animal models.

Overall, I believe this manuscript could add to the overall scope of knowledge in this field.

********** 

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Reviewer #1: No

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Revision 1

Dear Editor,

With this I submit a revision of our manuscript, “Daily feeding rhythm linked to microbiome composition in two zooplankton species”, by myself, R.O. Copper, and C.E. Cressler. The original submission received a thoughtful review. We have revised the manuscript in accordance with the suggestion of the reviewer. Below we discuss our response (tabbed) to the reviewer’s comment.

In addition, we included a copy of S1 Table in the revision and updated citation 59 with the correct information.

We hope you will find that we have addressed all the concerns of the reviewers satisfactorily, and that the revised manuscript will be suitable for publication.

Sincerely,

Alaina C. Pfenning-Butterworth

alainapfenning@gmail.com

Reviewer #1: The original research presented by this group investigating the links between biological rhythms, feeding behaviors and microbial composition in Daphnia models was incredibly novel and interesting. While the data show that Daphnia species have daily differences in microbial composition that is directly related to feeding behavior, I have a few questions regarding some the statistical analyses.

In a Materials and Methods subsection titled "Sequence analysis, visualization and statistics", authors describe the use of individual t-test on amplicon sequence variants to examine taxa across time points. In many cases, the use of t-test on high-dimensional data can leave room for major error. If possible, can authors please answer the following question: Were there adjustments for p values and false discovery rates? Are there other studies that have used individual t-test to compare ASVs?

We used t-tests to compare the relative abundance of each individual ASV at day versus night within a host species (Lines 127-129). We did not compare the relative abundance of different ASVs to one another within the same host species. Because we are not conducting multiple comparisons within each host species-by-timepoint dataset and we are substantially reducing the high-dimensional dataset to only ASVs at relatively high abundance, we do not believe it is necessary to include a correction for multiple comparison. Other studies have used t-tests and ANOVAs to compare ASVs (see Wang et al. 2020 “Characterizing changes in soil microbiome abundance and diversity due to different cover crop techniques”; Lutz et al. 2019 “A Simple Microbiome in the European Common Cuttlefish, Sepia officinalis”; Aira et al. 2019 “Microbiome dynamics during cast ageing in the earthworm Aporrectodea caliginosa”).

We reworded the sentence to describe the comparison more clearly. Lines 127 – 132 now read:

To find taxa that differed significantly between time points, we focused on relatively common ASVs (≥0.005 relative abundance) and compared day-versus-night relative abundance using two statistical tests. For ASVs that were unique to one host species, we compared the relative abundance of each ASV at day versus night using a t-test. For ASVs abundant in both host species we compared the relative abundances of each ASV at day versus night using ANOVA.

The Results and Discussion sections were well written and easy to follow. I appreciated the authors describing how the taxa affected during feeding phases may be involved in different metabolic processes. This also leaves room for deeper analysis and the development of future circadian rhythm-microbiome studies in other animal models.

Overall, I believe this manuscript could add to the overall scope of knowledge in this field.

Attachments
Attachment
Submitted filename: Response_to_reviewers.docx
Decision Letter - Juan J Loor, Editor

Daily feeding rhythm linked to microbiome composition in two zooplankton species

PONE-D-21-36303R1

Dear Dr. Pfenning-Butterworth,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Juan J Loor

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

**********

3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

**********

4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

**********

5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

**********

6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Special thanks to the authors for addressing the comments regarding statistics and rewording sentences for clarity. I believe the authors have addressed all of my comments and now the manuscript reads very well.

**********

7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: Yes: Meli'sa Shaunte Crawford

Formally Accepted
Acceptance Letter - Juan J Loor, Editor

PONE-D-21-36303R1

Daily feeding rhythm linked to microbiome composition in two zooplankton species

Dear Dr. Pfenning-Butterworth:

I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now with our production department.

If your institution or institutions have a press office, please let them know about your upcoming paper now to help maximize its impact. If they'll be preparing press materials, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information please contact onepress@plos.org.

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Kind regards,

PLOS ONE Editorial Office Staff

on behalf of

Dr. Juan J Loor

Academic Editor

PLOS ONE

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