1 / 14

Some slides on warming, precipitation, and biomass harvesting experiments in Oklahoma

Some slides on warming, precipitation, and biomass harvesting experiments in Oklahoma. Yiqi Luo Department of Microbiology and Plant Biology University of Oklahoma, USA. http://ecolab.ou.edu. 4-year warming, precipitation and clipping experiment . 14-year warming and clipping experiment .

knox
Download Presentation

Some slides on warming, precipitation, and biomass harvesting experiments in Oklahoma

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Some slides on warming, precipitation, and biomass harvesting experiments in Oklahoma Yiqi Luo Department of Microbiology and Plant Biology University of Oklahoma, USA http://ecolab.ou.edu

  2. 4-year warming, precipitation and clipping experiment 14-year warming and clipping experiment C3 dominant C4 dominant

  3. Long-term: 14 yearsWarming: 2oCClipping: Yearly

  4. warming x Precipitation x Bioenergy

  5. Phenology Growing season Leaf Ps Respiration Plant growth Plant & soil C Microbial community Fungi/bacteria Plant community C4/C3 species NUE Quality of bulk litter Plant N uptake Litter Decomposition Available N Luo, 2007. Ann. Rev. Ecol. Evol. System

  6. Phenology Growing season Leaf Ps Respiration Plant growth Plant & soil C Microbial community Fungi/bacteria Plant community C4/C3 species NUE Quality of bulk litter Plant N uptake Litter Decomposition Available N Sherry et al. 2007, PNAS Zhou et al. 2007a, JIPB Zhou et al. 2006, GBC; 2007b, GCB Luo et al. 2001, Nature Sherry et al. 2008, GCB Luo et al. 2009, GCB-E Sherry et al. 2010, 2011, 2012 An et al. 2005, GCB Zhang et al. 2005 GCB Zhou et al. 2012 NCC Wan et al. 2005, GBC Niu et al. 2010, Ecology Cheng et al. 2010 Agric Ecosystems

  7. Warming effects on C & N storages Plant C increased, but plant and soil N didn’t change Niu et al. 2010 Ecology

  8. Contributions of N and NUE Niu et al. 2010

  9. Mechanism: species composition changes

  10. Contrast warming effects between C3 and C4 vegetation C4 grassland C3 grassland W: -26~53% W: +32% W: -18~19% W: +12~25% W: +4~9% W: -8~18% Niu et al. 2013

  11. C3 & C4 composition determines warming effects! Niu et al. 2013

  12. Mechanism: different optimum temperature Niu et al. 2013

  13. Acclimation of soil respiration to warming Luo et al. 2001 Nature

  14. Control Panicum ♦ Warming 30 ♦ Erigeron ♦ ♦ Achillea ♦ ♦ Dichanthelium 25 ♦ ♦ ♦ ♦ ♦ Andropogon Plantago ♦ Temperature oC ♦ ♦ ♦ Bromus ♦ 20 Schizachyrium ♦ ♦ ♦ Cerastium ♦ ♦ Ambrosia ♦ Veronica ♦ ♦ 15 Viola Flowering  Advanced Flowering Delayed  60 90 120 150 180 210 240 270 300 330 A. Julian Day 2003 2x Precipitation Panicum ♦ Warming + 2x Precipitation 30 ♦ Erigeron ♦ ♦ Achillea ♦ ♦ Dichanthelium 25 ♦ ♦ Andropogon ♦ ♦ Plantago ♦ ♦ Temperature oC ♦ ♦ Bromus 20 ♦ ♦ Schizachyrium ♦ ♦ ♦ Cerastium ♦ ♦ Ambrosia ♦ Veronica 15 ♦ Flowering  Advanced Flowering Delayed  ♦ Viola 60 90 120 150 180 210 240 270 300 330 B. Julian Day 2003 Sherry et al. 2007 PNAS

More Related