Influence of spring and autumn phenological transitions on forest ecosystem productivity
Andrew D. Richardson,T. Andy Black,Philippe Ciais,Nicolas Delbart,Mark A. Friedl,Nadine Gobron,David Y. Hollinger,Werner L. Kutsch,Bernard Longdoz,Sebastiaan Luyssaert,Sebastiaan Luyssaert,Mirco Migliavacca,Leonardo Montagnani,Leonardo Montagnani,J. William Munger,Eddy Moors,Shilong Piao,Corinna Rebmann,Markus Reichstein,Nobuko Saigusa,Enrico Tomelleri,Rodrigo Vargas,Andrej Varlagin +22 more
TLDR
Investigation of relationships between phenology and productivity in temperate and boreal forests finds the productivity of evergreen needleleaf forests is less sensitive to phenology than is productivity of deciduous broadleaf forests, which has implications for how climate change may drive shifts in competition within mixed-species stands.Abstract:
We use eddy covariance measurements of net ecosystem productivity (NEP) from 21 FLUXNET sites (153 site-years of data) to investigate relationships between phenology and productivity (in terms of both NEP and gross ecosystem photosynthesis, GEP) in temperate and boreal forests. Results are used to evaluate the plausibility of four different conceptual models. Phenological indicators were derived from the eddy covariance time series, and from remote sensing and models. We examine spatial patterns (across sites) and temporal patterns (across years); an important conclusion is that it is likely that neither of these accurately represents how productivity will respond to future phenological shifts resulting from ongoing climate change. In spring and autumn, increased GEP resulting from an 'extra' day tends to be offset by concurrent, but smaller, increases in ecosystem respiration, and thus the effect on NEP is still positive. Spring productivity anomalies appear to have carry-over effects that translate to productivity anomalies in the following autumn, but it is not clear that these result directly from phenological anomalies. Finally, the productivity of evergreen needleleaf forests is less sensitive to phenology than is productivity of deciduous broadleaf forests. This has implications for how climate change may drive shifts in competition within mixed-species stands.read more
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Usability of time-lapse digital camera images to detect characteristics of tree phenology in a tropical rainforest
Shin Nagai,Tomoaki Ichie,Aogu Yoneyama,Hideki Kobayashi,Tomoharu Inoue,Reiichiro Ishii,Rikie Suzuki,Takao Itioka +7 more
TL;DR: The results show the importance of installing multiple time-lapse digital cameras in tropical rainforests to accurately evaluate the sensitivity of tree phenology to meteorological and climatic changes and more work needs to be done to adequately describe whole-canopy changes.
Journal ArticleDOI
Timing of seed germination correlated with temperature-based environmental conditions during seed development in conifers
Yang Liu,Yousry A. El-Kassaby +1 more
TL;DR: Insight is provided into the germination niche as affected by global warming, indicating that conifers' seed dormancy in BC (north of 54°N) tends to increase and the changes associated with early spring warm-up are expected to accelerate seedling emergence, as shortened winters would have a minimal effect on dormancy decay.
Journal ArticleDOI
Corrigendum: Contrasting response of grassland versus forest carbon and water fluxes to spring drought in Switzerland (2013 Environ. Res. Lett. 8 035007)
Sebastian Wolf,Sebastian Wolf,Werner Eugster,Christof Ammann,Matthias Häni,S. Zielis,Rebecca Hiller,J. Stieger,Dennis Imer,Lutz Merbold,Nina Buchmann +10 more
TL;DR: In this article, the authors synthesize Swiss FluxNet data from three grassland and two forest ecosystems to investigate the effects of this spring drought, and they found that the grassland productivity did not recover following grass cuts.
Journal ArticleDOI
Spring- and fall-flowering species show diverging phenological responses to climate in the Southeast USA
TL;DR: The results suggest that even warm, humid regions may experience phenological shifts and thus be susceptible to potentially detrimental effects such as plant-pollinator asynchrony.
Journal ArticleDOI
Determination of the gas exchange phenology in an evergreen coniferous forest from 7 years of eddy covariance flux data using an extended big-leaf analysis
Yoshiko Kosugi,Satoru Takanashi,Masahito Ueyama,Shinjiro Ohkubo,Hiroki Tanaka,Kazuho Matsumoto,Natsuko Yoshifuji,Mioko Ataka,Ayaka Sakabe +8 more
TL;DR: In this paper, the authors defined gas exchange phenology as the seasonality of the gas exchange characteristics of a forest canopy, and investigated how the gas-exchange phenology could be directly detected from an eddy covariance (EC) dataset and its influence on the canopy fluxes within an evergreen Japanese cypress forest.
References
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Shifting plant phenology in response to global change
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