Contrasting sensitivity to extreme winter warming events of dominant sub-Arctic heathland bryophyte and lichen species
نویسندگان
چکیده
منابع مشابه
Snow cover and extreme winter warming events control flower abundance of some, but not all species in high arctic Svalbard
The High Arctic winter is expected to be altered through ongoing and future climate change. Winter precipitation and snow depth are projected to increase and melt out dates change accordingly. Also, snow cover and depth will play an important role in protecting plant canopy from increasingly more frequent extreme winter warming events. Flower production of many Arctic plants is dependent on mel...
متن کاملImpacts of long-term enhanced UV-B radiation on bryophytes in two sub-Arctic heathland sites of contrasting water availability.
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 above-ground 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 inconclusiv...
متن کاملArctic browning: extreme events and trends reversing arctic greening.
NOAA’s recent assessment of Arctic greenness has reported a remarkable finding: the Arctic is browning (Epstein et al., 2015). Whilst a clear greening trend has been apparent for most of the satellite record’s 33 year history (indicating an increase in biomass and productivity), there is now an overall decline in greenness from 2011 to 2014. If this is a new direction of travel for arctic veget...
متن کاملThe early twentieth century warming and winter Arctic sea ice
The Arctic has featured the strongest surface warming over the globe during the recent decades, and the temperature increase has been accompanied by a rapid decline in sea ice extent. However, little is known about Arctic sea ice change during the early twentieth century warming (ETCW) during 1920–1940, also a period of a strong surface warming, both globally and in the Arctic. Here, we investi...
متن کاملContrasting effects of summer and winter warming on body mass explain population dynamics in a food-limited Arctic herbivore.
The cumulative effects of climate warming on herbivore vital rates and population dynamics are hard to predict, given that the expected effects differ between seasons. In the Arctic, warmer summers enhance plant growth which should lead to heavier and more fertile individuals in the autumn. Conversely, warm spells in winter with rainfall (rain-on-snow) can cause 'icing', restricting access to f...
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ژورنال
عنوان ژورنال: Journal of Ecology
سال: 2011
ISSN: 0022-0477
DOI: 10.1111/j.1365-2745.2011.01859.x