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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Phenology of leaf morphological, photosynthetic, and nitrogen use characteristics of canopy trees in a cool-temperate deciduous broadleaf forest at Takayama, central Japan
Hibiki M. Noda,Hiroyuki Muraoka,Kenlo Nishida Nasahara,Nobuko Saigusa,Shohei Murayama,Hiroshi Koizumi +5 more
TL;DR: The timings (calendar dates) of leaf expansion, maturity, and senescence differed among the 7 years, indicating that interannual variations in micrometeorological conditions strongly affected leaf phenological events.
Journal ArticleDOI
Inter-annual and seasonal trends of vegetation condition in the Upper Blue Nile (Abay) Basin: dual-scale time series analysis
TL;DR: In this paper, the authors examined inter-annual and seasonal trends of vegetation cover in the Upper Blue Nile (UBN) or Abbay Basin using the Advanced Very High Resolution Radiometer (AVHRR)-based Global Inventory, Monitoring, and Modeling Studies (GIMMS) normalized difference vegetation index (NDVI) at low spatial resolution.
Journal ArticleDOI
Changes in the geographical distribution of plant species and climatic variables on the West Cornwall peninsula (South West UK).
Aleksandra Kosanic,Aleksandra Kosanic,Karen Anderson,Stephan Harrison,Thea Turkington,Jonathan Bennie +5 more
TL;DR: A method to manually geo-reference botanical records from a historical herbarium to track changes in the geographical distributions of plant species in West Cornwall (South West England) using both historical (pre- 1900) and contemporary (post-1900) distribution records is described.
Journal ArticleDOI
Phenology plays an important role in the regulation of terrestrial ecosystem water-use efficiency in the Northern Hemisphere
TL;DR: It is argued that phenology plays an important role in the regulation of WUE by analyzing seasonal WUE responses to variability of photosynthetic phenological factors in terrestrial ecosystems of the Northern Hemisphere using MODIS satellite observations during 2000–2014.
Journal ArticleDOI
Ecosystem response more than climate variability drives the inter-annual variability of carbon fluxes in three Chinese grasslands
Tao Zhang,Yangjian Zhang,Mingjie Xu,Mingjie Xu,Yi Xi,Juntao Zhu,Xianzhou Zhang,Yanfen Wang,Yingnian Li,Peili Shi,Guirui Yu,Xiaomin Sun +11 more
TL;DR: In this paper, the authors used eddy covariance (EC) measurements over three typical grasslands in China to investigate the dynamics of NEP and its two components − gross primary productivity and ecosystem respiration and their driving forces.
References
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