Season to supply an annual estimate. Keller et al. (2010) measured strontium isotope ratios (87Sr86Sr), which decrease with depth in soils in the Arctic LTER, to estimate the growing depth of water flow RE-640 price inside the soil. Applying the point-frame system described by Walker (1996), Gould and Mercado-Diaz (in Shaver et al. 2014) monitored the response of plant communities to ambient climate in 155 permanent plots. Measurements were created at 5- to 7-year intervals due to the fact 1989 in two 1 km2 grids setTable two Environmental and ecological variables measured over the long-term at Toolik and Zackenberg web pages Web-site Toolik Internet site Climate Thaw depth Biology Kuparuk River Climate, physics Biology Climatic norms for river basin (1989010) and discharge and temperature (1972010) are in Bowden et al. (2014) Main production and respiration (1984998), epilithic chlorophyll (1983010), bryophyte cover (1992006), benthic insect taxa (1984998), and grayling development (1985005) data are in Bowden et al. (2014) Epilimnion temperature (July, 1985007) and summer time alkalinity (1975011) information are in Luecke et al. (2014) Chlorophyll (July, 1985010) data are in Luecke et al. (2014) Temperature, 1991005, wind path and speed (1985005), and precipitation, 1997005, are offered in Hansen et al. (2008). Information are available at Greenland Ecosystem Monitoring (http:www.information.g-e-m.dk) The summer season thaw depth progression from June 1 to September 7 at ZEROCALM-2, 1996005, is provided in Christiansen et al. (2008) Plant communities were analyzed (1997, 2008) in relation to summer season temperature and spring snow cover. Five replicate plots in eight plant communities have been sampled (Schmidt et al. 2012). NDVI measures (Tagesson et al. 2012) gave gross main production at the peak in the developing season from 1992 to 2008 Precipitation, temperature, and snow depth measured hourly (1996010). Abundance of six plant species, six taxa of arthropods, 4 species of birds, and 3 mammals measured weekly and seasonally (Mortensen et al. 2014). At two lakes, temperature, ice cover, and nutrients have been measured (1997005) too as volume of phytoplankton and abundance of zooplankton (Christoffersen et al. 2008) Air temperature, precipitation, wind speed and direction, and expanding season dates for 1989010 are in Cherry et al. (2014) Summer season depths of thaw for July and August in the Tussock Watershed, 1989010, are in Kling et al. (2014) Net principal production aboveground for moist acidic tundra from six harvests 1989000 and point-frame data (four harvests 1989008) are in Shaver et al. (2014) Environmental and ecological variablesToolik Lake Physics and chemistry Biology Zackenberg Physics Thaw depth Plant communities and production Variations and trends in biotic and abiotic PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21300681 ecosystem compartmentsThe Author(s) 2017. This article is published with open access at Springerlink.com www.kva.seenAmbio 2017, 46(Suppl. 1):S160SFig. 2 Annual mean Barrow SAT (surface air temperature, closed circles) for 1950014, annual mean Toolik SAT (x’s) for 1989-2014, and Zackenberg SAT (open squares) for 1996014. Also shown will be the linear regressions for Barrow 1950014 (dashed dot line), Barrow 1996014 (short-dashed line), Toolik 1996014 (long-dashed line), and Zackenberg 1996014 (dotted line). Regression lines and coefficients are ordered from top rated to bottom as Toolik, Zackenberg, Barrow (1996014), and Barrow (1950014). Only the Barrow 1950014 and Zackenberg 1996014 linear regressions are important (p \ 0.01). Data from Alaska Climate Analysis Ce.
