Recent climate hiatus revealed dual control by temperature and drought on the stem growth of Mediterranean <i>Quercus ilex</i>. Lempereur, M., Limousin, J., M., Guibal, F., F., Ourcival, J., M., Rambal, S., Ruffault, J., & Mouillot, F. Global Change Biology, 2016. ![Recent climate hiatus revealed dual control by temperature and drought on the stem growth of Mediterranean <i>Quercus ilex</i> [link]](https://bibbase.org/img/filetypes/link.svg "link")
Website doi abstract bibtex A better understanding of stem growth phenology and its climate drivers would improve projections of the impact of climate change on forest productivity. Under a Mediterranean climate, tree growth is primarily limited by soil water availability during summer, but cold temperatures in winter also prevent tree growth in evergreen forests. In the wide-spread Mediterranean evergreen tree species Quercus ilex, the duration of stem growth has been shown to predict annual stem increment, and to be limited by winter temperatures on the one hand, and by the summer drought onset on the other hand. We tested how these climatic controls of Q. ilex growth varied with recent climate change by correlat-ing a 40-year tree ring record and a 30-year annual diameter inventory against winter temperature, spring precipitation, and simulated growth duration. Our results showed that growth duration was the best predictor of annual tree growth. We predicted that recent climate changes have resulted in earlier growth onset (À10 days) due to winter warming and earlier growth cessation (À26 days) due to earlier drought onset. These climatic trends partly offset one another, as we observed no significant trend of change in tree growth between 1968 and 2008. A moving-window correlation analysis revealed that in the past, Q. ilex growth was only correlated with water availability, but that since the 2000s, growth suddenly became correlated with winter temperature in addition to spring drought. This change in the climate–growth correlations matches the start of the recent atmospheric warming pause also known as the 'climate hiatus'. The duration of growth of Q. ilex is thus shortened because winter warming has stopped compensating for increasing drought in the last decade. Decoupled trends in precipitation and temperature, a neglected aspect of climate change, might reduce for-est productivity through phenological constraints and have more consequences than climate warming alone. Abbreviations FS = long-term field survey of diameter at breast height (DBH), measured from 1986 to 2013 RW = ring-width series, measured from 1942 to 2008 AD = automatic dendrometer series, measured from 2004 to 2013 Pu echabon station = weather station located in the study site since 1984 SML station = weather station located in St Martin-de-Londres, 12 km away from the study site, data available from 1966 to 2013 (Meteo France) T JFM = mean of daily temperature from January to March (°C) P AMJ = sum of precipitation from April to June (mm) WSI = water stress integral, a time-cumulated drought severity index (MPa day) t 0 = day of year when stem growth starts t 1 = day of year when stem growth stops in early summer ∆t t0–t1 = duration of the period between t 0 and t 1 computed for each set of simu-lated phenological thresholds BAI = basal area increment of the stems, expressed in mm² yr À1 PET = potential evapotranspiration (mm)
@article{
title = {Recent climate hiatus revealed dual control by temperature and drought on the stem growth of Mediterranean <i>Quercus ilex</i>},
type = {article},
year = {2016},
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abstract = {A better understanding of stem growth phenology and its climate drivers would improve projections of the impact of climate change on forest productivity. Under a Mediterranean climate, tree growth is primarily limited by soil water availability during summer, but cold temperatures in winter also prevent tree growth in evergreen forests. In the wide-spread Mediterranean evergreen tree species Quercus ilex, the duration of stem growth has been shown to predict annual stem increment, and to be limited by winter temperatures on the one hand, and by the summer drought onset on the other hand. We tested how these climatic controls of Q. ilex growth varied with recent climate change by correlat-ing a 40-year tree ring record and a 30-year annual diameter inventory against winter temperature, spring precipitation, and simulated growth duration. Our results showed that growth duration was the best predictor of annual tree growth. We predicted that recent climate changes have resulted in earlier growth onset (À10 days) due to winter warming and earlier growth cessation (À26 days) due to earlier drought onset. These climatic trends partly offset one another, as we observed no significant trend of change in tree growth between 1968 and 2008. A moving-window correlation analysis revealed that in the past, Q. ilex growth was only correlated with water availability, but that since the 2000s, growth suddenly became correlated with winter temperature in addition to spring drought. This change in the climate–growth correlations matches the start of the recent atmospheric warming pause also known as the 'climate hiatus'. The duration of growth of Q. ilex is thus shortened because winter warming has stopped compensating for increasing drought in the last decade. Decoupled trends in precipitation and temperature, a neglected aspect of climate change, might reduce for-est productivity through phenological constraints and have more consequences than climate warming alone. Abbreviations FS = long-term field survey of diameter at breast height (DBH), measured from 1986 to 2013 RW = ring-width series, measured from 1942 to 2008 AD = automatic dendrometer series, measured from 2004 to 2013 Pu echabon station = weather station located in the study site since 1984 SML station = weather station located in St Martin-de-Londres, 12 km away from the study site, data available from 1966 to 2013 (Meteo France) T JFM = mean of daily temperature from January to March (°C) P AMJ = sum of precipitation from April to June (mm) WSI = water stress integral, a time-cumulated drought severity index (MPa day) t 0 = day of year when stem growth starts t 1 = day of year when stem growth stops in early summer ∆t t0–t1 = duration of the period between t 0 and t 1 computed for each set of simu-lated phenological thresholds BAI = basal area increment of the stems, expressed in mm² yr À1 PET = potential evapotranspiration (mm)},
bibtype = {article},
author = {Lempereur, Morine and Limousin, Jean-Marc Marc and Guibal, Fr??d??ric Frédéric and Ourcival, Jean-Marc Marc and Rambal, Serge and Ruffault, Julien and Mouillot, Florent},
doi = {10.1111/gcb.13495},
journal = {Global Change Biology}
}
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These climatic trends partly offset one another, as we observed no significant trend of change in tree growth between 1968 and 2008. A moving-window correlation analysis revealed that in the past, Q. ilex growth was only correlated with water availability, but that since the 2000s, growth suddenly became correlated with winter temperature in addition to spring drought. This change in the climate–growth correlations matches the start of the recent atmospheric warming pause also known as the 'climate hiatus'. The duration of growth of Q. ilex is thus shortened because winter warming has stopped compensating for increasing drought in the last decade. Decoupled trends in precipitation and temperature, a neglected aspect of climate change, might reduce for-est productivity through phenological constraints and have more consequences than climate warming alone. Abbreviations FS = long-term field survey of diameter at breast height (DBH), measured from 1986 to 2013 RW = ring-width series, measured from 1942 to 2008 AD = automatic dendrometer series, measured from 2004 to 2013 Pu echabon station = weather station located in the study site since 1984 SML station = weather station located in St Martin-de-Londres, 12 km away from the study site, data available from 1966 to 2013 (Meteo France) T JFM = mean of daily temperature from January to March (°C) P AMJ = sum of precipitation from April to June (mm) WSI = water stress integral, a time-cumulated drought severity index (MPa day) t 0 = day of year when stem growth starts t 1 = day of year when stem growth stops in early summer ∆t t0–t1 = duration of the period between t 0 and t 1 computed for each set of simu-lated phenological thresholds BAI = basal area increment of the stems, expressed in mm² yr À1 PET = potential evapotranspiration (mm)","bibtype":"article","author":"Lempereur, Morine and Limousin, Jean-Marc Marc and Guibal, Fr??d??ric Frédéric and Ourcival, Jean-Marc Marc and Rambal, Serge and Ruffault, Julien and Mouillot, Florent","doi":"10.1111/gcb.13495","journal":"Global Change Biology","bibtex":"@article{\n title = {Recent climate hiatus revealed dual control by temperature and drought on the stem growth of Mediterranean <i>Quercus ilex</i>},\n type = {article},\n year = {2016},\n keywords = {FR_PUE},\n pages = {1-14},\n websites = {http://doi.wiley.com/10.1111/gcb.13495},\n id = {d6599adb-b29b-39c0-b487-ea26c6e7d995},\n created = {2020-08-28T15:56:02.399Z},\n file_attached = {false},\n profile_id = {5c1040db-25e3-36ea-a919-0994a44709e7},\n group_id = {c4af41cc-7e3c-3fd3-9982-bdb923596eee},\n last_modified = {2020-08-28T15:56:02.399Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {Lempereur2016},\n private_publication = {false},\n abstract = {A better understanding of stem growth phenology and its climate drivers would improve projections of the impact of climate change on forest productivity. 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These climatic trends partly offset one another, as we observed no significant trend of change in tree growth between 1968 and 2008. A moving-window correlation analysis revealed that in the past, Q. ilex growth was only correlated with water availability, but that since the 2000s, growth suddenly became correlated with winter temperature in addition to spring drought. This change in the climate–growth correlations matches the start of the recent atmospheric warming pause also known as the 'climate hiatus'. The duration of growth of Q. ilex is thus shortened because winter warming has stopped compensating for increasing drought in the last decade. Decoupled trends in precipitation and temperature, a neglected aspect of climate change, might reduce for-est productivity through phenological constraints and have more consequences than climate warming alone. 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