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Effects of moisture dynamics on bryophyte carbon fluxes in a tropical cloud forest

Metcalfe, Daniel B. LU and Ahlstrand, Jenny C.M. (2019) In New Phytologist 222(4). p.1766-1777
Abstract


Bryophytes play key roles in the ecological function of a number of major world biomes but remain understudied compared with vascular plants. Little is known about bryophyte responses to different aspects of predicted changes in moisture dynamics with climate change. In this study, CO
2
fluxes and photosynthetic light responses were measured within bryophyte mesocosms, being subjected to different amounts, frequencies, and types (mist or rainfall) of water addition, both before and after different periods of complete desiccation. Bryophyte... (More)


Bryophytes play key roles in the ecological function of a number of major world biomes but remain understudied compared with vascular plants. Little is known about bryophyte responses to different aspects of predicted changes in moisture dynamics with climate change. In this study, CO
2
fluxes and photosynthetic light responses were measured within bryophyte mesocosms, being subjected to different amounts, frequencies, and types (mist or rainfall) of water addition, both before and after different periods of complete desiccation. Bryophyte carbon fluxes and photosynthetic light response were generally affected by the magnitude and type, but not frequency, of watering events. Desiccation suppressed bryophyte carbon uptake even after rehydration, and the degree of uptake suppression progressively increased with desiccation duration. Estimated ecosystem-level bryophyte respiration and net carbon uptake were c. 58% and c. 3%, respectively, of corresponding fluxes from tree foliage at the site. Our results suggest that a simplified representation of precipitation processes may be sufficient to accurately model bryophyte carbon cycling under future climate scenarios. Further, we find that projected increases in drought could have strong negative impacts on bryophyte and ecosystem carbon storage, with major consequences for a wide range of ecosystem processes.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ecophysiology, global change ecology, mesocosm experiment, photosynthesis, plant–climate interactions, rainfall frequency, respiration, tropical montane cloud forest
in
New Phytologist
volume
222
issue
4
pages
1766 - 1777
publisher
Wiley-Blackwell
external identifiers
  • pmid:30716175
  • scopus:85062448444
ISSN
0028-646X
DOI
10.1111/nph.15727
language
English
LU publication?
yes
id
1d0cf706-c7d5-4765-ab7e-238f2c6d8865
date added to LUP
2019-03-14 12:33:02
date last changed
2020-01-13 01:33:13
@article{1d0cf706-c7d5-4765-ab7e-238f2c6d8865,
  abstract     = {<p><br>
                                                         Bryophytes play key roles in the ecological function of a number of major world biomes but remain understudied compared with vascular plants. Little is known about bryophyte responses to different aspects of predicted changes in moisture dynamics with climate change. In this study, CO                             <br>
                            <sub>2</sub><br>
                                                          fluxes and photosynthetic light responses were measured within bryophyte mesocosms, being subjected to different amounts, frequencies, and types (mist or rainfall) of water addition, both before and after different periods of complete desiccation. Bryophyte carbon fluxes and photosynthetic light response were generally affected by the magnitude and type, but not frequency, of watering events. Desiccation suppressed bryophyte carbon uptake even after rehydration, and the degree of uptake suppression progressively increased with desiccation duration. Estimated ecosystem-level bryophyte respiration and net carbon uptake were c. 58% and c. 3%, respectively, of corresponding fluxes from tree foliage at the site. Our results suggest that a simplified representation of precipitation processes may be sufficient to accurately model bryophyte carbon cycling under future climate scenarios. Further, we find that projected increases in drought could have strong negative impacts on bryophyte and ecosystem carbon storage, with major consequences for a wide range of ecosystem processes.                         <br>
                        </p>},
  author       = {Metcalfe, Daniel B. and Ahlstrand, Jenny C.M.},
  issn         = {0028-646X},
  language     = {eng},
  month        = {02},
  number       = {4},
  pages        = {1766--1777},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Effects of moisture dynamics on bryophyte carbon fluxes in a tropical cloud forest},
  url          = {http://dx.doi.org/10.1111/nph.15727},
  doi          = {10.1111/nph.15727},
  volume       = {222},
  year         = {2019},
}