Skip header and navigation

1 records – page 1 of 1.

Both seed germination and seedling mortality increase with experimental warming and fertilization in a subarctic tundra.

https://arctichealth.org/en/permalink/ahliterature286227
Source
AoB Plants. 2017 Sep;9(5):plx040
Publication Type
Article
Date
Sep-2017
Author
Ann Milbau
Nicolas Vandeplas
Fred Kockelbergh
Ivan Nijs
Source
AoB Plants. 2017 Sep;9(5):plx040
Date
Sep-2017
Language
English
Publication Type
Article
Abstract
Climate change is expected to force many species in arctic regions to migrate and track their climatic niche. This requires recruitment from seed, which currently shows very low rates in arctic regions, where long-lived and vegetatively reproducing plants dominate. Therefore, we pose the question whether recruitment (germination and seedling establishment) in arctic regions will significantly improve in a warmer world, and thus allow species to follow their climatic niche. We used a full factorial experiment to examine if realistic warmer temperatures (+3 ?C; infrared radiation) and increased nitrogen availability (+1.4 g N m(-2) year(-1)) affected germination, seedling survival and above- and below-ground seedling biomass in five species common in subarctic regions (Anthoxanthum odoratum, Betula nana, Pinus sylvestris, Solidago virgaurea, Vaccinium myrtillus). We found that warming increased seedling emergence in all species, but that subsequent mortality also increased, resulting in no net warming effect on seedling establishment. Warming slightly increased above-ground seedling biomass. Fertilization, on the other hand, did not influence seedling biomass, but it increased seedling establishment in B. nana while it reduced establishment in V. myrtillus. This may help B. nana dominate over V. myrtillus in warmer tundra. Surprisingly, no interactive effects between warming and fertilization were found. The lack of a general positive response of seedling establishment to warmer and more nutrient-rich conditions suggests that (sub)arctic species may experience difficulties in tracking their climatic niche. Predictions of future species distributions in arctic regions solely based on abiotic factors may therefore overestimate species' ranges due to their poor establishment. Also, the opposite response to fertilization of two key (sub)arctic dwarf shrubs, i.e. B. nana and V. myrtillus, could have important implications for the future development of arctic plant communities and argues for more research into the role of fertilization for plant establishment.
Notes
Cites: PLoS One. 2014 Feb 26;9(2):e8966424586947
Cites: Ann Bot. 2009 Aug;104(2):287-9619443459
Cites: Oecologia. 2001 Feb;126(4):543-56228547240
Cites: Ambio. 2011 Sep;40(6):683-9221954730
Cites: Am J Bot. 2005 Mar;92(3):422-3121652418
Cites: Oecologia. 1995 Jun;102(4):478-48928306891
Cites: Oecologia. 1996 Jan;105(1):1-1228307116
Cites: Oecologia. 1996 Nov;108(3):389-41128307854
Cites: New Phytol. 2013 Feb;197(3):1002-1123206238
Cites: Oecologia. 2009 Apr;159(4):705-1519137328
Cites: New Phytol. 2008 Jul;179(2):428-3919086179
Cites: New Phytol. 2011 Jun;190(4):1019-3121342202
Cites: Oecologia. 2015 Oct;179(2):599-60826065402
Cites: New Phytol. 2015 Jan;205(1):34-5825209220
Cites: J Exp Bot. 2014 Jan;65(1):299-31024220655
Cites: Ecol Lett. 2007 Dec;10(12):1135-4217922835
Cites: Ann Bot. 2011 Jul;108(1):177-8321624960
Cites: Nature. 2004 Sep 23;431(7007):440-315386009
Cites: Oecologia. 2011 Jun;166(2):565-7621170749
Cites: Proc Natl Acad Sci U S A. 2006 Jan 31;103(5):1342-616428292
Cites: Am Nat. 2007 Jul;170(1):128-4217853997
Cites: New Phytol. 2012 Jan;193(2):474-8021988606
PubMed ID
29026511 View in PubMed
Less detail