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Hill, Geoff B; Henry, Gregory HR (2011): (Table 1) Biomass and total standing crop of major wet sedge tundra species at five sites at Alexandra Fiord in 1981 and 2005. PANGAEA, https://doi.org/10.1594/PANGAEA.811179, Supplement to: Hill, GB; Henry, GHR (2011): Responses of High Arctic wet sedge tundra to climate warming since 1980. Global Change Biology, 17(1), 276-287, https://doi.org/10.1111/j.1365-2486.2010.02244.x

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Abstract:
The global climate is changing rapidly and Arctic regions are showing responses to recent warming. Responses of tundra ecosystems to climate change have been examined primarily through short-term experimental manipulations, with few studies of long-term ambient change. We investigated changes in above- and belowground biomass of wet sedge tundra to the warming climate of the Canadian High Arctic over the past 25 years. Aboveground standing crop was harvested from five sedge meadow sites and belowground biomass was sampled from one of the sites in the early 1980s and in 2005 using the same methods. Aboveground biomass was on average 158% greater in 2005 than in the early 1980s. The belowground biomass was also much greater in 2005: root biomass increased by 67% and rhizome biomass by 139% since the early 1980s. Dominant species from each functional group (graminoids, shrubs and forbs) showed significant increases in aboveground biomass. Responsive species included the dominant sedge species Carex aquatilis stans, C. membranacea, and Eriophorum angustifolium, as well as the dwarf shrub Salix arctica and the forb Polygonum viviparum. However, diversity measures were not different between the sample years. The greater biomass correlated strongly with increased annual and summer temperatures over the same time period, and was significantly greater than the annual variation in biomass measured in 1980-1983. Increased decomposition and mineralization rates, stimulated by warmer soils, were likely a major cause of the elevated productivity, as no differences in the mass of litter were found between sample periods. Our results are corroborated by published short-term experimental studies, conducted in other wet sedge tundra communities which link warming and fertilization with elevated decomposition, mineralization and tundra productivity. We believe that this is the first study to show responses in High Arctic wet sedge tundra to recent climate change.
Coverage:
Latitude: 78.883300 * Longitude: -75.916700
Date/Time Start: 1981-01-01T00:00:00 * Date/Time End: 2005-01-01T00:00:00
Event(s):
Alexandra_Fiord_sites * Latitude: 78.883300 * Longitude: -75.916700 * Location: Ellesmere Island, Canadian Arctic Archipelago * Method/Device: Sampling by hand (HAND)
Comment:
Biomass refers to all live above- or belowground plant tissue. Standing crop refers to all live and attached dead plant material, above- or belowground. Litter is unattached aboveground dead plant material. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1SiteSiteHill, Geoff B
2DATE/TIMEDate/TimeGeocode
3Sample amountN#Hill, Geoff B
4Carex spp., biomassCarex spp. biomg/m2Hill, Geoff BWeighing of dry specimens
5Carex spp., standard deviationCarex spp. std dev±Hill, Geoff BWeighing of dry specimensbiomass
6Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensCarex spp.
7Carex spp., standard deviationCarex spp. std dev±Hill, Geoff BWeighing of dry specimensstanding crop
8Carex misandra, biomassC. misandra biomg/m2Hill, Geoff BWeighing of dry specimens
9Carex misandra, standard deviationC. misandra std dev±Hill, Geoff BWeighing of dry specimensbiomass
10Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensCarex misandra
11Carex misandra, standard deviationC. misandra std dev±Hill, Geoff BWeighing of dry specimensstanding crop
12Eriophorum angustifolium, biomassE. angustifolium biomg/m2Hill, Geoff BWeighing of dry specimens
13Eriophorum angustifolium, standard deviationE. angustifolium std dev±Hill, Geoff BWeighing of dry specimensbiomass
14Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensEriophorum angustifolium
15Eriophorum angustifolium, standard deviationE. angustifolium std dev±Hill, Geoff BWeighing of dry specimensstanding crop
16Kobresia spp., biomassKobresia spp. biomg/m2Hill, Geoff BWeighing of dry specimens
17Kobresia spp., standard deviationKobresia spp. std dev±Hill, Geoff BWeighing of dry specimensbiomass
18Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensKobresia spp.
19Kobresia spp., standard deviationKobresia spp. std dev±Hill, Geoff BWeighing of dry specimensstanding crop
20Arctagrostis latifolia, biomassA. latifolia biomg/m2Hill, Geoff BWeighing of dry specimens
21Arctagrostis latifolia, standard deviationA. latifolia std dev±Hill, Geoff BWeighing of dry specimensbiomass
22Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensArctagrostis latifolia
23Arctagrostis latifolia, standard deviationA. latifolia std dev±Hill, Geoff BWeighing of dry specimensstanding crop
24Juncus biglumis, biomassJ. biglumis biomg/m2Hill, Geoff BWeighing of dry specimens
25Juncus biglumis, standard deviationJ. biglumis std dev±Hill, Geoff BWeighing of dry specimensbiomass
26Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensJuncus biglumis
27Juncus biglumis, standard deviationJ. biglumis std dev±Hill, Geoff BWeighing of dry specimensstanding crop
28Polygonum viviparum, biomassP. viviparum biomg/m2Hill, Geoff BWeighing of dry specimens
29Polygonum viviparum, standard deviationP. viviparum std dev±Hill, Geoff BWeighing of dry specimensbiomass
30Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensPolygonum viviparum
31Polygonum viviparum, standard deviationP. viviparum std dev±Hill, Geoff BWeighing of dry specimensstanding crop
32Equisetum spp., biomassEquisetum spp. biomg/m2Hill, Geoff BWeighing of dry specimens
33Equisetum spp., standard deviationEquisetum spp. std dev±Hill, Geoff BWeighing of dry specimensbiomass
34Dryas integrifolia, biomassD. integrifolia biomg/m2Hill, Geoff BWeighing of dry specimens
35Dryas integrifolia, standard deviationD. integrifolia std dev±Hill, Geoff BWeighing of dry specimensbiomass
36Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensDryas integrifolia
37Dryas integrifolia, standard deviationD. integrifolia std dev±Hill, Geoff BWeighing of dry specimensstanding crop
38Salix arctica, biomassS. arctica biomg/m2Hill, Geoff BWeighing of dry specimens
39Salix arctica, standard deviationS. arctica std dev±Hill, Geoff BWeighing of dry specimensbiomass
40Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimensSalix arctica
41Salix arctica, standard deviationS. arctica std dev±Hill, Geoff BWeighing of dry specimensstanding crop
42Plants, total vascular, biomassPlants vasc biomg/m2Hill, Geoff BWeighing of dry specimens
43Standard deviationStd dev±Hill, Geoff BWeighing of dry specimenstotal vascular biomass
44Standing crop, vegetationStand crop vegg/m2Hill, Geoff BWeighing of dry specimenstotal vascular
45Standard deviationStd dev±Hill, Geoff BWeighing of dry specimenstotal vascular standing crop
46Bryophyta, biomassBryophyta biomg/m2Hill, Geoff BWeighing of dry specimens
47Standard deviationStd dev±Hill, Geoff BWeighing of dry specimensbryophyta biomass
48Litter, biomassLitter biomg/m2Hill, Geoff BWeighing of dry specimens
49Standard deviationStd dev±Hill, Geoff BWeighing of dry specimenslitter biomass
Size:
550 data points

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