skip to main content

DOE PAGESDOE PAGES

Title: Methanol and isoprene emissions from the fast growing tropical pioneer species Vismia guianensis (Aubl.) Pers. (Hypericaceae) in the central Amazon forest

Isoprene (Is) emissions by plants represent a loss of carbon and energy resources leading to the initial hypothesis that fast growing pioneer species in secondary tropical forests allocate carbon primarily to growth at the expense of isoprenoid defenses. In this study, we quantified leaf isoprene and methanol emissions from the abundant pantropical pioneer tree species Vismia guianensis and ambient isoprene concentrations above a diverse secondary forest in the central Amazon. As photosynthetically active radiation (PAR) was varied (0 to 3000 µmol m -2 s -1) under standard leaf temperature (30 °C), isoprene emissions from V. guianensis increased without saturation up to 80 nmol m -2 s -1. A nonlinear increase in isoprene emissions with respect to net photosynthesis (Pn) resulted in the fraction of Pn dedicated to isoprene emissions increasing with light intensity (up to 2 % of Pn). Emission responses to temperature under standard light conditions (PAR of 1000 µmol m -2 s -1) resulted in the classic uncoupling of isoprene emissions ( T opt, iso > 40 °C) from net photosynthesis ( T opt, Pn = 30.0–32.5 °C) with up to 7 % of Pn emitted as isoprene at 40 °C. Under standard environmental conditions of PAR andmore » leaf temperature, young V. guianensis leaves showed high methanol emissions, low Pn, and low isoprene emissions. In contrast, mature leaves showed high Pn, high isoprene emissions, and low methanol emissions, highlighting the differential control of leaf phenology over methanol and isoprene emissions. High daytime ambient isoprene concentrations (11 ppbv) were observed above a secondary Amazon rainforest, suggesting that isoprene emissions are common among neotropical pioneer species. The results are not consistent with the initial hypothesis and support a functional role of methanol during leaf expansion and the establishment of photosynthetic machinery and a protective role of isoprene for photosynthesis during high temperature extremes regularly experienced in secondary rainforest ecosystems.« less
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division
  2. National Inst. for Amazon Research (INPA), Manaus (Brazil)
  3. Harvard Univ., Cambridge, MA (United States). School of Engineering and Applied Sciences, Dept. of Earth and Planetary Sciences
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Geography
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Published Article
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 16; Journal Issue: 10; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES
OSTI Identifier:
1254520
Alternate Identifier(s):
OSTI ID: 1379357

Jardine, Kolby J., Jardine, Angela B., Souza, Vinicius F., Carneiro, Vilany, Ceron, Joao V., Gimenez, Bruno O., Soares, Cilene P., Durgante, Flavia M., Higuchi, Niro, Manzi, Antonio O., Gonçalves, José F. C., Garcia, Sabrina, Martin, Scot T., Zorzanelli, Raquel F., Piva, Luani R., and Chambers, Jeff Q.. Methanol and isoprene emissions from the fast growing tropical pioneer species Vismia guianensis (Aubl.) Pers. (Hypericaceae) in the central Amazon forest. United States: N. p., Web. doi:10.5194/acp-16-6441-2016.
Jardine, Kolby J., Jardine, Angela B., Souza, Vinicius F., Carneiro, Vilany, Ceron, Joao V., Gimenez, Bruno O., Soares, Cilene P., Durgante, Flavia M., Higuchi, Niro, Manzi, Antonio O., Gonçalves, José F. C., Garcia, Sabrina, Martin, Scot T., Zorzanelli, Raquel F., Piva, Luani R., & Chambers, Jeff Q.. Methanol and isoprene emissions from the fast growing tropical pioneer species Vismia guianensis (Aubl.) Pers. (Hypericaceae) in the central Amazon forest. United States. doi:10.5194/acp-16-6441-2016.
Jardine, Kolby J., Jardine, Angela B., Souza, Vinicius F., Carneiro, Vilany, Ceron, Joao V., Gimenez, Bruno O., Soares, Cilene P., Durgante, Flavia M., Higuchi, Niro, Manzi, Antonio O., Gonçalves, José F. C., Garcia, Sabrina, Martin, Scot T., Zorzanelli, Raquel F., Piva, Luani R., and Chambers, Jeff Q.. 2016. "Methanol and isoprene emissions from the fast growing tropical pioneer species Vismia guianensis (Aubl.) Pers. (Hypericaceae) in the central Amazon forest". United States. doi:10.5194/acp-16-6441-2016.
@article{osti_1254520,
title = {Methanol and isoprene emissions from the fast growing tropical pioneer species Vismia guianensis (Aubl.) Pers. (Hypericaceae) in the central Amazon forest},
author = {Jardine, Kolby J. and Jardine, Angela B. and Souza, Vinicius F. and Carneiro, Vilany and Ceron, Joao V. and Gimenez, Bruno O. and Soares, Cilene P. and Durgante, Flavia M. and Higuchi, Niro and Manzi, Antonio O. and Gonçalves, José F. C. and Garcia, Sabrina and Martin, Scot T. and Zorzanelli, Raquel F. and Piva, Luani R. and Chambers, Jeff Q.},
abstractNote = {Isoprene (Is) emissions by plants represent a loss of carbon and energy resources leading to the initial hypothesis that fast growing pioneer species in secondary tropical forests allocate carbon primarily to growth at the expense of isoprenoid defenses. In this study, we quantified leaf isoprene and methanol emissions from the abundant pantropical pioneer tree species Vismia guianensis and ambient isoprene concentrations above a diverse secondary forest in the central Amazon. As photosynthetically active radiation (PAR) was varied (0 to 3000 µmol m-2 s-1) under standard leaf temperature (30 °C), isoprene emissions from V. guianensis increased without saturation up to 80 nmol m-2 s-1. A nonlinear increase in isoprene emissions with respect to net photosynthesis (Pn) resulted in the fraction of Pn dedicated to isoprene emissions increasing with light intensity (up to 2 % of Pn). Emission responses to temperature under standard light conditions (PAR of 1000 µmol m-2 s-1) resulted in the classic uncoupling of isoprene emissions (Topt, iso > 40 °C) from net photosynthesis (Topt, Pn = 30.0–32.5 °C) with up to 7 % of Pn emitted as isoprene at 40 °C. Under standard environmental conditions of PAR and leaf temperature, young V. guianensis leaves showed high methanol emissions, low Pn, and low isoprene emissions. In contrast, mature leaves showed high Pn, high isoprene emissions, and low methanol emissions, highlighting the differential control of leaf phenology over methanol and isoprene emissions. High daytime ambient isoprene concentrations (11 ppbv) were observed above a secondary Amazon rainforest, suggesting that isoprene emissions are common among neotropical pioneer species. The results are not consistent with the initial hypothesis and support a functional role of methanol during leaf expansion and the establishment of photosynthetic machinery and a protective role of isoprene for photosynthesis during high temperature extremes regularly experienced in secondary rainforest ecosystems.},
doi = {10.5194/acp-16-6441-2016},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 10,
volume = 16,
place = {United States},
year = {2016},
month = {5}
}