Arroniz-Crespo, Maria; Gwynn-Jones, Dylan; Callaghan, Terry V; Núñez-Olivera, E; Martínez-Abaigar, J; Horton, P; Phoenix, Gareth K (2011): (Table 1) Chlorophyll concentration and pigment composition of carotenoids in three heathland bryophytes, northern Sweden [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.807081, Supplement to: Arroniz-Crespo, M et al. (2011): Impacts of long-term enhanced UV-B radiation on bryophytes in two sub-Arctic heathland sites of contrasting water availability. Annals of Botany, 108(3), 557-565, https://doi.org/10.1093/aob/mcr178
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Abstract:
Background and Aims: Anthropogenic depletion of stratospheric ozone in Arctic latitudes has resulted in an increase of ultraviolet-B radiation (UV-B) reaching the biosphere. UV-B exposure is known to reduce aboveground biomass and plant height, to increase DNA damage and cause accumulation of UV-absorbing compounds in polar plants. However, many studies on Arctic mosses tended to be inconclusive. The importance of different water availability in influencing UV-B impacts on lower plants in the Arctic has been poorly explored and might partially explain the observed wide variation of responses, given the importance of water in controlling bryophyte physiology. This study aimed to assess the long-term responses of three common sub-Arctic bryophytes to enhanced UV-B radiation (+UV-B) and to elucidate the influence of water supply on those responses.
Results: Responses were species specific: H. splendens responded most to +UV-B, with reduction in both annual growth (-22%) and sporophyte production (-44%), together with increased b-carotene, violaxanthin, total chlorophyll and NPQ, and decreased zeaxanthin and de-epoxidation of the xanthophyll cycle pool (DES). Barbilophozia lycopodioides responded less to +UV-B, showing increased b-carotene and sclerophylly and decreased UV-absorbing compounds. Polytrichum commune only showed small morphogenetic changes. No effect of UV-B on bryophyte cover was observed. Water availability had profound effects on bryophyte ecophysiology, and plants showed, in general, lower growth and ETR, together with a higher photoprotection in the drier site. Water availability also influenced bryophyte responses to +UV-B and, in particular, responses were less detectable in the drier site.
Conclusions: Impacts of UV-B exposure on Arctic bryophytes were significant, in contrast to modest or absent UV-B effects measured in previous studies. The impacts were more easily detectable in species with high plasticity such as H. splendens and less obvious, or more subtle, under drier conditions. Species biology and water supply greatly influences the impact of UV-B on at least some Arctic bryophytes and could contribute to the wide variation of responses observed previously.
Project(s):
Coverage:
Latitude: 68.350000 * Longitude: 18.817000
Minimum Elevation: 340.0 m * Maximum Elevation: 400.0 m
Event(s):
Abisko_ANS (Abisko Scientific Research Station) * Latitude: 68.350000 * Longitude: 18.817000 * Elevation Start: 340.0 m * Elevation End: 400.0 m * Location: Abisko, Lappland, northern Sweden
Comment:
Sample amount (n) = 4 for all. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
288 data points
Data
| 1 Description (water regime) | 2 Species | 3 Type (of bryophyte) | 4 Treat (radiation regime) | 5 Chl tot [mg/m2] (Spectrophotometry) | 6 Chl tot std [±] (Spectrophotometry) | 7 Ratio (Chl a/b) | 8 Std dev [±] (ratio Chl a/b) | 9 Neo [%] (of total carotenoids, High Pe...) | 10 Neo std [±] (High Performance Liquid Chrom...) | 11 Lut [%] (of total carotenoids, High Pe...) | 12 Lut std [±] (High Performance Liquid Chrom...) | 13 bb-Car [%] (of total carotenoids, High Pe...) | 14 bb-Car std [±] (High Performance Liquid Chrom...) | 15 Viola [%] (of total carotenoids, High Pe...) | 16 Viola std [±] (High Performance Liquid Chrom...) | 17 Anthera [%] (of total carotenoids, High Pe...) | 18 Anthera std dev [±] (High Performance Liquid Chrom...) | 19 Zea [%] (of total carotenoids, High Pe...) | 20 Zea std [±] (High Performance Liquid Chrom...) | 21 Sum [%] (xanthophylls involved in the ...) | 22 Std dev [±] (sum (XC)) | 23 Perc [%] (extent of de-epoxidation of t...) | 24 Std dev [±] (perc of de-epoxidation (DES)) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mesic | Hylocomium splendens | feather moss | Control | 33.1 | 1.9 | 2.15 | 0.07 | 6.7 | 0.3 | 57.9 | 0.8 | 18.0 | 0.6 | 1.5 | 0.3 | 2.2 | 0.1 | 13.7 | 0.5 | 17.4 | 0.3 | 89.5 | 0.8 |
| mesic | Hylocomium splendens | feather moss | +UVB | 34.9 | 0.9 | 2.22 | 0.04 | 6.2 | 0.1 | 55.3 | 1.5 | 22.0 | 0.9 | 1.8 | 0.2 | 2.2 | 0.2 | 12.4 | 0.6 | 16.5 | 0.7 | 88.3 | 1.6 |
| drier | Hylocomium splendens | feather moss | Control | 26.3 | 0.6 | 2.61 | 0.01 | 5.6 | 0.5 | 48.7 | 0.9 | 24.7 | 0.9 | 3.2 | 0.3 | 2.9 | 0.1 | 14.8 | 1.0 | 21.0 | 0.8 | 84.5 | 2.5 |
| drier | Hylocomium splendens | feather moss | +UVB | 37.7 | 3.8 | 2.50 | 0.05 | 7.6 | 0.3 | 51.0 | 0.6 | 22.3 | 0.5 | 4.0 | 0.2 | 2.7 | 0.2 | 12.2 | 0.8 | 19.0 | 0.7 | 77.2 | 1.6 |
| mesic | Polytrichum commune | common haircap moss | Control | 84.4 | 6.1 | 2.50 | 0.08 | 9.3 | 0.2 | 54.7 | 0.4 | 23.1 | 0.3 | 6.3 | 0.2 | 1.2 | 0.1 | 5.3 | 0.3 | 12.8 | 0.7 | 50.2 | 0.8 |
| mesic | Polytrichum commune | common haircap moss | +UVB | 65.1 | 7.1 | 2.53 | 0.04 | 8.8 | 0.3 | 55.1 | 0.9 | 23.6 | 0.7 | 7.0 | 0.1 | 1.3 | 0.1 | 4.0 | 0.6 | 12.3 | 0.5 | 42.5 | 3.3 |
| drier | Polytrichum commune | common haircap moss | Control | 151.4 | 11.7 | 2.56 | 0.05 | 8.0 | 0.4 | 51.0 | 1.0 | 25.2 | 0.5 | 7.4 | 0.9 | 2.5 | 0.3 | 5.7 | 1.4 | 15.7 | 0.9 | 51.2 | 8.1 |
| drier | Polytrichum commune | common haircap moss | +UVB | 143.1 | 9.7 | 2.47 | 0.04 | 8.9 | 0.1 | 53.7 | 0.9 | 22.1 | 2.4 | 8.5 | 0.3 | 2.2 | 0.4 | 4.5 | 1.2 | 15.1 | 1.6 | 42.7 | 5.6 |
| mesic | Barbilophozia lycopodioides | foliose liverwort | Control | 69.1 | 3.4 | 2.03 | 0.02 | 10.1 | 0.2 | 59.9 | 0.5 | 19.8 | 0.2 | 3.7 | 0.3 | 1.7 | 0.3 | 4.8 | 0.7 | 10.2 | 0.6 | 61.5 | 5.7 |
| mesic | Barbilophozia lycopodioides | foliose liverwort | +UVB | 60.1 | 5.8 | 2.05 | 0.05 | 10.4 | 0.4 | 60.1 | 0.2 | 19.5 | 0.3 | 3.9 | 0.5 | 1.8 | 0.2 | 4.2 | 0.6 | 9.9 | 0.4 | 59.4 | 6.2 |
| drier | Barbilophozia lycopodioides | foliose liverwort | Control | 48.2 | 11.7 | 2.19 | 0.07 | 10.0 | 0.9 | 56.6 | 0.5 | 18.4 | 0.2 | 8.1 | 0.5 | 2.2 | 0.4 | 4.6 | 1.4 | 15.0 | 1.4 | 43.4 | 7.1 |
| drier | Barbilophozia lycopodioides | foliose liverwort | +UVB | 42.3 | 9.7 | 2.26 | 0.03 | 10.6 | 0.3 | 55.7 | 0.2 | 19.5 | 0.3 | 8.1 | 0.3 | 1.9 | 0.1 | 4.1 | 0.4 | 14.0 | 0.3 | 41.2 | 2.2 |