Skip to main content

Advertisement

Log in

Oxygen isotopes in tree rings of Cedrela odorata L. as an indicator of hydroclimate variations in a seasonally dry tropical forest in northeastern Brazil

  • Original Article
  • Published:
Trees Aims and scope Submit manuscript

Abstract

Key message

We present the first δ18O chronology of a tropical dry forest tree species in Brazil. Our results showed a strong relationship of δ18O with inter-annual variation of moisture conditions during the growing season.

Abstract

In seasonally dry tropical environments, natural archives of isotopes present in cellulose of tree rings can be used to study changes in the hydrological cycle. We investigated the stable oxygen isotope ratios in tree-ring cellulose (δ18OTRC) of Cedrela odorata L. from Caatinga forest, northeastern Brazil, and tested if δ18OTRC is correlated to climate parameters. We extracted the α-cellulose from the most recent 50 tree rings (1968–2017). The inter-annual variation of δ18OTRC was strongly synchronized (r = 0.65) among all five studied individuals and closely related to changes in humidity during the growing season. The δ18OTRC was significantly correlated (p < 0.01) with precipitation (r = − 0.59), relative humidity (r = − 0.37), air temperature (r = 0.55), soil water deficit (r = 0.62) and PDSI drought index (r = − 0.62), with most significant correlation during wet season and in the first month of the dry season. The relationship with local climate variables reflects the effect of evaporative enrichment of leaf water on δ18OTRC, whereby dry soil conditions, the low relative humidity and high air temperature reduce stomatal conductance and lead to increased evaporative enrichment of δ18OTRC. Spatial correlations revealed a strong impact of PDSI in δ18OTRC. Our results also show an increase in δ18OTRC values from the 1990s onwards due to extreme and recurring droughts in northeastern Brazil. We conclude that δ18OTRC variations are related to the climatic conditions, especially during the wet period due to the greater water availability for plant physiological processes.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

References

Download references

Acknowledgements

We are particularly grateful to Ms Iris Burchardt for technical assistance during sample preparation and Ms Roswitha Hoefner-Stich for laboratory analyses. We would like to thank the anonymous reviewers for their helpful comments. The first author expresses a deep appreciation to the tree-ring research group of the Institute of Geography, University of Erlangen-Nuremberg for their assistance during the Post-Doctoral internship.

Funding

This study was funded by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—CAPES, Post-Doctoral Research Abroad (88881.170289/2018-01) and was also by Conselho Nacional de Desenvolvimento Científico e Tecnológico—CNPq (MCTI/CNPQ/UNIVERSAL 14/2011-449668/2014-2).

Author information

Authors and Affiliations

Authors

Contributions

MAP, conducted the fieldwork, established the chronology, performed the isotope analysis and wrote the manuscript. IRNM, contributed to the interpretation of the results and helped in writing the manuscript. CMC, participated in the fieldwork and contributed to the chronology. CSL, supervised the research and the tree ring analyses. AB, supervised the research, the tree ring and isotope analyses, provide critical feedback and helped shape the research. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Mariana Alves Pagotto.

Ethics declarations

Conflict of interest

The authors declare that there is no conflict of interest.

Additional information

Communicated by S. Leavitt .

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (PDF 470 KB)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Pagotto, M.A., Menezes, I.R.N., Costa, C.M. et al. Oxygen isotopes in tree rings of Cedrela odorata L. as an indicator of hydroclimate variations in a seasonally dry tropical forest in northeastern Brazil. Trees 35, 1889–1903 (2021). https://doi.org/10.1007/s00468-021-02158-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00468-021-02158-z

Keywords

Navigation