Leita frttum mbl.is

Hva gerist tndrunni vi hlnun jarar?

Tndran er margslungin, ftk af tegundum en auug af lfmassa, stug en einnig vikvm og hn er eitt mikilvgasta vistkerfi sem verur fyrir hrifum hnattrnna loftslagsbreytinga.

Fstudagnn 13. aprl kl. 12.30 skju N-131, mun Ingibjrg Svala Jnsdttir, prfessor vi Lf- og umhverfisvsindadeild, kynna rannsknir snar fyrirlestrarr Lffristofu:

Erindi hennar verur flutt ensku, og nefnist Phenological responses to climate warming across the tundra biome

a_141.jpggrip erindis birtist einnig vefsu lffristofu H.

During more than two decades valuable data has been collected within the research network International Tundra Experiment (ITEX) aiming at answering the question how climate warming affects tundra plant communities and ecosystems. The large number of research sites widely distributed across the tundra biome, the use of standardized protocols and the combination of experimental warming and monitoring make this network unique. Several data syntheses have provided groundbreaking insights into how climate warming affects growth and reproduction of individual tundra plants and tundra plant communities. In this talk I will focus on more recent synthesis of phenological data. As expected, they show that warming accelerates phenology in general. Furthermore, the syntheses reveal that plants at colder sites (high Arctic) are more sensitive to a given increase in summer temperatures than plants at warmer sites (low Arctic and Alpine), that warming shortens the flowering season for Arctic and alpine plants and more so for late flowering species than early flowering. I will discuss the implications of these differential phenological responses to warming for plant reproductive success, plant establishment and trophic interactions in tundra ecosystems.

Dagskr fstudagsfyrirlestra Lffristofu


Sasta frsla | Nsta frsla

Athugasemdir

1 Smmynd: Valdimar Samelsson

Kri Arnar. a sem skeur Tndrum norlgrasla er a 7mnuirsins er engin uppgufun vegna kulda og sfrera. essa rfu mnui mestalagi 3 gti einhva borist andrmslofti af Methane. etta er allt of sumt. Ef vi eigum a vara reikna t hva mannskapur og dr prumpa miki held g a vsindamenn su farnir a ganga of langt en held samt a mia vi grur essum svum skapi ekki eins miki methand en sulgari slum enda Tndrugrur.

Valdimar Samelsson, 13.4.2018 kl. 11:19

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