Nuuk Basic:BioBasis programme

• Main Authors: Olsen, Maia, Nymand, Josephine, Raundrup, Katrine, Aastrup, Peter, Krogh, Paul Henning, Lauridsen, Torben Linding, Lund, Magnus, Albert, Kristian Rost
• Other Authors: Magelund Jensen, Lillian, Christensen, Torben Røjle
• Format: Other Non-Article Part of Journal/Newspaper
• Language: English
• Published: Aarhus University, DCE - Danish Centre for Environment and Energy 2014
• Subjects: Nuuk; Empetrum nigrum
• Online Access: https://pure.au.dk/portal/da/publications/nuuk-basic(df031201-5b99-40f1-bfdf-01ab619a59a8).html; http://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Oevrige_udgivelser/NERO_7th_Annual_Report_2014.pdf

Results of the seventh year of the BioBasis monitoring programme at Nuuk arepresented. Reproductive phenology: In L. procumbens and S. acaulis vegetative phenology is similar to that of 2012, although there was a tendency to produce larger numbers of flowers in most plots. The timing of 50 % flowering was within the same range as previous years. The flower bud production, the onset of flowering, and the peak flower production of L. procumbens occurred at approximately the same timeas in 2012. A second bud production was recorded 3 September Day of Year (DOY) 246. All plots produced more flowers in 2013 than in 2012. The first senescent flowers were recorded about the same time as in 2012. Timing of budding, flowering and senescence in S. acaulis was later thanin 2012. S. glauca buds were observed aweek later compared to the earliest year 2010. First flowering male catkins were observed 13 June (DOY 164) and first female catkins 18 June (DOY 169). The first female flowers with hair were observed 11 July. A higher number of flowers were produced in 2013 than in 2012. During April the area was exposed to two weeks of severe snowmelt, followed by heavy snowfall in May, resulting in late snowmelt. A preliminary review of data related to flowering indicates that 2013 was characterized by no larval outbreak of the noctuid moth E. occulta , and large numbers of flowers produced in L. procumbens and S. glauca compared to 2012. Vegetation greening: Empetrum nigrum reached the highest Normalised Difference Vegetation Index (NDVI) values of all the species, and NDVI was consistently high throughout the season. The values were at the same level or higher than in 2012, which was the highest recorded so far. Generally, the vegetation greening in 2013 was very similar to that in 2012. The NDVI values were in many cases higher throughout the season compared to previous years, with an intermediate to late peak. The vegetation seems to have recovered after the outbreak of the noctuid moth larvae. Carbon dioxide exchange: Since ...