Integrating Hyperspectral Reflectance and Physiological Parameters to Detect Urban Tree Stress: A Study of Drought and Simulated Acid Rain

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Authors conducted pot experiments to examine the response of hyperspectral reflectance and physiological parameters of Prunus yedoensis to drought and simulated acid rain stress, providing a theoretical basis for detecting stress in urban trees. Overall, the manuscript is written well, but there are some issues that need to be addressed.

Title: It is necessary to revise it as only drought and simulated acid rain are analyzed. The current title does not include this information.

Introduction

L50: Typically, Leaf chlorophyll…?

The hypothesis or research question needs to be clearly stated.

The reason why authors are concerned about drought and simulated acid rain needs to be enhanced.

Results and Discussions

The abbreviations “Chl a, CK, DT, and SAT” need to be given their full names when they first appear in the Figures and Tables. As suggested, legends should be added to Figures. Please examine other figures for similar problems.

The units of data need to be provided in the Figures and Tables.

If the authors determined the net photosynthesis rate, it is suggested to provide it.

PCA results reveal that the cumulative percentage (PC1+PC2) is relatively low (< 60%), please clarify it.

It is recommended that discussions be presented as a separate section. Additionally, it should be enhanced. In this section, the width and depth are both important. The authors made some comparisons with previous studies, but it could be enhanced. The reason why physiological parameters change under stress conditions is not clearly stated.

Research limitations and future research should be included.

Author Response

Title: It is necessary to revise it as only drought and simulated acid rain are analyzed. The current title does not include this information.

As requested, we have revised the title.

Introduction

L50: Typically, Leaf chlorophyll…?

We have revised the sentence.

The hypothesis or research question needs to be clearly stated.

We have supplemented the content.

The reason why authors are concerned about drought and simulated acid rain needs to be enhanced.

We have included the reasons in the introduction.

Results and Discussions

The abbreviations “Chl a, CK, DT, and SAT” need to be given their full names when they first appear in the Figures and Tables. As suggested, legends should be added to Figures. Please examine other figures for similar problems.

As requested, we have made the revisions.

The units of data need to be provided in the Figures and Tables.

As requested, we have made the revisions.

If the authors determined the net photosynthesis rate, it is suggested to provide it.

We have included the net photosynthesis rate along with the WUE values in the sentence.

PCA results reveal that the cumulative percentage (PC1+PC2) is relatively low (< 60%), please clarify it.

We have presented the cumulative percentage in the results section and discussed future research directions in the discussion section.

It is recommended that discussions be presented as a separate section. Additionally, it should be enhanced. In this section, the width and depth are both important. The authors made some comparisons with previous studies, but it could be enhanced. The reason why physiological parameters change under stress conditions is not clearly stated.

We have added the ‘4. Discussion’ section to address the requested points.

Research limitations and future research should be included.

We have added the '5. Limitations and Future Study' section.

Reviewer 2 Report

Comments and Suggestions for Authors

1 Include the limitations of your study, for example the sample size, the specific conditions under which the experiments were conducted, and any other factors that may have influenced the results.

 

2 Add directions for future research that could address these limitations.

 

3 Explain the practical implications of your results, for example, how your findings can be applied in the management and conservation of urban trees, especially in the context of climate change in urban areas. This could include recommendations for monitoring and maintaining the health of trees in urban areas, as well as some policies and practices that cities could implement to mitigate the impact of climate change on their green spaces.

Author Response

1 Include the limitations of your study, for example the sample size, the specific conditions under which the experiments were conducted, and any other factors that may have influenced the results.

2 Add directions for future research that could address these limitations.

3 Explain the practical implications of your results, for example, how your findings can be applied in the management and conservation of urban trees, especially in the context of climate change in urban areas. This could include recommendations for monitoring and maintaining the health of trees in urban areas, as well as some policies and practices that cities could implement to mitigate the impact of climate change on their green spaces.

We added the '5. Limitations and Future Study' section. Please check.

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

All comments have been addressed. I have no new comments.