Street, Lorna E; Shaver, Gauis R; Rastetter, Edward B; van Wijk, Mark T; Kaye, Brooke A; Williams, Mathew (2012): (Table 3) Leaf area and leaf nitrogen for deciduous, evergreen, forb and graminoid species at Barrow, Svalbard and Zackenberg [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.837943, Supplement to: Street, LE et al. (2012): Incident radiation and the allocation of nitrogen within Arctic plant canopies: implications for predicting gross primary productivity. Global Change Biology, 18(9), 2838-2852, https://doi.org/10.1111/j.1365-2486.2012.02754.x
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Arctic vegetation is characterized by high spatial variability in plant functional type (PFT) composition and gross primary productivity (P). Despite this variability, the two main drivers of P in sub-Arctic tundra are leaf area index (LT) and total foliar nitrogen (NT). LT and NT have been shown to be tightly coupled across PFTs in sub-Arctic tundra vegetation, which simplifies up-scaling by allowing quantification of the main drivers of P from remotely sensed LT. Our objective was to test the LT-NT relationship across multiple Arctic latitudes and to assess LT as a predictor of P for the pan-Arctic. Including PFT-specific parameters in models of LT-NT coupling provided only incremental improvements in model fit, but significant improvements were gained from including site-specific parameters. The degree of curvature in the LT-NT relationship, controlled by a fitted canopy nitrogen extinction co-efficient, was negatively related to average levels of diffuse radiation at a site. This is consistent with theoretical predictions of more uniform vertical canopy N distributions under diffuse light conditions. Higher latitude sites had higher average leaf N content by mass (NM), and we show for the first time that LT-NT coupling is achieved across latitudes via canopy-scale trade-offs between NM and leaf mass per unit leaf area (LM). Site-specific parameters provided small but significant improvements in models of P based on LT and moss cover. Our results suggest that differences in LT-NT coupling between sites could be used to improve pan-Arctic models of P and we provide unique evidence that prevailing radiation conditions can significantly affect N allocation over regional scales.
Project(s):
Coverage:
Median Latitude: 74.891020 * Median Longitude: -53.069833 * South-bound Latitude: 71.300000 * West-bound Longitude: -156.667000 * North-bound Latitude: 78.900000 * East-bound Longitude: 18.010000
Minimum Elevation: 7.0 m * Maximum Elevation: 7.0 m
Event(s):
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Area/locality | Area | Street, Lorna E | |||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Species | Species | Street, Lorna E | |||
| 5 | Sample amount | N | # | Street, Lorna E | ||
| 6 | Vegetation type | Vegetation type | Street, Lorna E | D = deciduous, E = evergreen, F = forb, G = graminoid | ||
| 7 | Nitrogen per area | N area | g/m2 | Street, Lorna E | per leaf area | |
| 8 | Nitrogen, standard deviation | N std dev | ± | Street, Lorna E | N/area | |
| 9 | Nitrogen, organic | N org | mg/kg | Street, Lorna E | per leaf mass | |
| 10 | Nitrogen, standard deviation | N std dev | ± | Street, Lorna E | N/mass | |
| 11 | Leaf area, specific, per mass dry weight | LA spec DW | mm2/mg | Street, Lorna E | ||
| 12 | Standard deviation | Std dev | ± | Street, Lorna E | leaf area |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
300 data points