Skip to main content
Have a personal or library account? Click to login
Atmospheric nitrogen deposition and canopy retention influences on photosynthetic performance at two high nitrogen deposition Swiss forests Cover

Atmospheric nitrogen deposition and canopy retention influences on photosynthetic performance at two high nitrogen deposition Swiss forests

Tellus B: Chemical and Physical Meteorology
Volume 64 (2012): Issue 1
By: ,  ,  ,  ,  ,  ,   and    
Open Access
|Jan 2012
Figures & tables

Figures & Tables

Table 1. Daily mean fluorometry and photosynthetic performance data at Novaggio oak forest in 2008 for N-treated foliage and control foliage. The daily means were calculated from all trees in each treatment group. Paired t-test results between the treatment groups were significant at p<0.05. Standard deviations (SD) for the daily mean values and the N treatment vs. control treatment ratios are also shown

N-treated foliage (daily mean values) Control foliage (daily mean values) Novaggio oak dates Fv/Fm Yield NPQ qN qP Fv/Fm Yield NPQ qN qP 6/25/2008 0.766 0.485 0.330 1.574 0.677 0.681 0.758 0.452 0.300 1.814 0.717 0.659 6/26/2008 0.765 0.489 0.318 1.575 0.695 0.649 0.749 0.454 0.312 1.807 0.743 0.693 6/27/2008 0.760 0.470 0.309 1.576 0.747 0.658 0.750 0.436 0.279 1.851 0.783 0.643 6/28/2008 0.739 0.523 0.318 1.108 0.803 0.610 0.738 0.469 0.304 1.406 0.845 0.655 6/29/2008 0.747 0.479 0.252 1.484 0.680 0.530 0.735 0.430 0.248 1.782 0.760 0.568 6/30/2008 0.747 0.448 0.251 1.782 0.741 0.560 0.739 0.424 0.253 1.820 0.770 0.591 7/1/2008 0.748 0.379 0.219 Outlier 0.822 0.570 0.741 0.323 0.195 Outlier 0.869 0.585 7/2/2008 0.750 0.447 0.258 1.758 0.738 0.564 0.737 0.391 0.248 2.165 0.801 0.632 7/3/2008 0.756 No high-light data collected this date 0.728 No high-light data collected this date 7/4/2008 0.749 0.471 0.259 1.363 0.697 0.568 0.741 0.424 0.277 1.804 0.746 0.641 7/5/2008 0.743 0.475 0.277 1.395 0.709 0.585 0.740 0.423 0.221 1.750 0.773 0.521 7/6/2008 0.748 No high-light data collected this date 0.742 No high-light data collected this date 7/8/2008 0.746 0.478 0.266 1.414 0.702 0.553 0.739 0.424 0.234 1.726 0.766 0.542 7/9/2008 0.734 0.477 0.230 1.317 0.481 0.487 0.730 0.425 0.222 1.558 0.553 0.527 7/10/2008 0.724 0.490 0.251 1.198 0.877 0.520 0.715 0.415 0.232 1.568 0.915 0.561 7/11/2008 0.737 0.499 0.232 1.448 0.871 0.474 0.728 0.434 0.226 1.865 0.915 0.525 7/16/2008 0.737 0.513 0.289 1.165 0.631 0.576 0.725 0.461 0.255 1.467 0.723 0.557 7/30/2008 0.731 0.540 0.309 1.079 0.605 0.594 0.720 0.493 0.292 1.327 0.688 0.627 8/5/2008 0.764 0.543 0.265 1.228 0.862 0.511 0.749 0.526 0.283 1.265 0.876 0.555 Mean 0.747 0.483 0.273 1.461 0.726 0.570 0.737 0.436 0.258 1.686 0.779 0.593 SD 0.012 0.038 0.034 0.216 0.103 0.057 0.011 0.043 0.034 0.235 0.090 0.054 p (T>t) <0.001 <0.001 0.0046 <0.001 <0.001 0.02 – – – – – – Mean N:C ratio 1.013 1.108 1.058 0.833 0.932 0.961 – – – – – –
Fig. 1. 

(a) Dark-adapted photosynthetic efficiency (Fv/Fm) fluorometry values for N and control treatments at Novaggio oak forest in 2008. (b) High-light photosynthetic efficiency () fluorometry values for N and control treatments at Novaggio oak forest in 2008. (c) Non-photochemical quenching (qN) fluorometry values for N and control treatments at Novaggio oak forest in 2008. (d) Daily depression of photosynthetic efficiency,% DDPE, for N-amended leaves and control leaves at Novaggio oak forest vs. 2008 sampling date. Bars are the 95% confidence intervals at each data point.

Table 2. Mean daily depression of photosynthetic efficiency (DDPE) data for the Novaggio oak forests. DDPE values shown were calculated using the daily maximum Fv/Fm leaf mean among the five tree branches

N-treated foliage Control foliage Site Fv/Fm DDPE (%) Fv/Fm DDPE (%) Novaggio oak 0.747 0.483 36.8 0.737 0.436 42.8

Table 3. Daily mean photosynthetic efficiency (PE) data at Lägeren beech and spruce forests in 2007 for N-treated foliage and for control foliage

N-treated foliage Control foliage Lägeren Sample date Fv/Fm Fv/Fm Beech 7/7/2007 0.708 0.336 0.742 0.408 7/13/2007 0.705 0.352 0.709 0.349 7/17/2007 0.713 0.330 0.712 0.355 7/18/2007 0.710 0.366 0.719 0.480 7/19/2007 0.722 0.356 0.732 0.408 7/23/2007 0.738 0.348 0.739 0.384 7/25/2007 0.656 0.330 0.689 0.343 7/26/2007 0.707 0.285 0.709 0.362 7/30/2007 0.716 0.341 0.722 0.403 7/31/2007 0.704 0.210 0.738 0.307 8/1/2007 0.672 0.307 0.717 0.380 8/6/2007 0.651 0.264 0.697 0.354 Mean 0.700 0.319 0.719 0.378 Spruce 7/12/2007 0.779 0.565 0.766 0.549 7/23/2007 0.746 0.528 0.786 0.471 7/25/2007 0.768 0.465 0.751 0.421 7/26/2007 0.735 0.428 0.741 0.469 7/30/2007 0.779 0.409 0.772 0.500 7/31/2007 0.749 0.463 0.762 0.407 8/1/2007 0.762 0.435 0.764 0.431 Mean 0.760 0.470 0.763 0.464

Table 4. Foliar elemental ratios at Novaggio oak forest and Lägeren beech and spruce forests for N treatment and control foliage. The leaf/needle concentration increases in element ratios due to N treatment, relative difference, are also shown

Site/species, N treatment and control Ratio N/P N/K N/Mg Novaggio oak N treatment 24.0 3.63 28.0 Control 24.8 3.72 29.1 Relative difference (%) −3 −2 −4 Lägeren beech N treatment 21.4 4.66 12.4 Control 20.2 3.91 12.7 Relative difference (%) 6 19 −2 Lägeren spruce N treatment 11.3 17.5 18.1 Control 11.4 17.9 16.4 Relative difference (%) −1 −2 10
DOI: https://doi.org/10.3402/tellusb.v64i0.17216 | Journal eISSN: 1600-0889
Journal RSS Feed
Language: English
Page range: 17216 - 17216
Submitted on: Jan 13, 2012
Accepted on: May 2, 2012
Published on: Jan 1, 2012
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services
Keywords:
atmospheric nitrogen deposition,
fluorometry,
canopy nitrogen uptake,
photosynthetic efficiency,
carbon storage

© 2012 E. Wortman, T. Tomaszewski, P. Waldner, P. Schleppi, A. Thimonier, W. Eugster, N. Buchmann, H. Sievering, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 64 (2012): Issue 1
Previous article
Next article