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Effects of soil warming history on the performances of congeneric temperate and boreal herbaceous plant species and their associations with soil biota

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Journal of Plant Ecology 2017年第4期10卷 670-680页

作者： Madhav P.Thakur Peter B.Reich Cameron Wagg Nicholas A.Fisichelli Marcel Ciobanu Sarah E.Hobbie Roy L.Rich Artur Stefanski Nico Eisenhauer German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig MitteDeutscher Platz 5E04103 LeipzigGermany Institute of Biology Leipzig UniversityJohannisallee 2104103 LeipzigGermany Department of Forest Resources University of Minnesota1530 North Cleveland AvenueSt.PaulMN 55108USA Hawkesbury Institute for the Environment University of Western SydneyPenrithNew South Wales 2751Australia Institute of Evolutionary Biology and Environmental Studies University of ZurichWinterthurerstrasse 190CH-8057 ZurichSwitzerland Forest Ecology Program Schoodic Institute at Acadia National ParkWinter HarborME 04693USA Institute of Biological Research Branch of the National Institute of Research and Development for Biological Sciences48 Republicii Street400015 Cluj-NapocaRomania Department of Ecology Evolutionand BehaviorUniversity of MinnesotaSt.PaulMN 55108USA

Aims Climate warming raises the probability of range expansions of warm-adapted temperate species into areas currently dominated by cold-adapted boreal ***-induced plant range expansions could partly depend on how warming modifies relationships with soil biota that promote plant growth,such as by mineralizing ***,we grew two pairs of congeneric herbaceous plants spe-cies together in soil with a 5-year warming history(ambient,+1.7℃,+3.4℃)and related their performances to plant-beneficial soil *** Each plant pair belonged to either the mid-latitude temperate climate or the higher latitude southern boreal *** soils were extracted from a chamberless heating experiment at two field sites in the temperate-boreal ecotone of North *** isolate poten-tial effects of different soil warming histories,air temperature for the greenhouse experiment was identical across *** hypothesized that soil with a 5-year warming history in the field would enhance the performance of temperate plant species more than boreal plant species and expected improved plant performances to have positive associations with plant growth-promoting soil biota(microbial-feeding nematodes and arbuscular mycorrhizal fungi).Important Findings Our main hypothesis was partly confirmed as only one temperate spe-cies performed better in soil with warming history than in soil with his-tory of ambient ***,this effect was restricted to the site with higher soil water content in the growing season of the sampling year(prior to soil collection).One of the boreal species performed con-sistently worse in previously warmed soil,whereas the other species showed neutral responses to soil warming *** found a positive correlation between the density of microbial-feeding nematodes and the performance of one of the temperate species in previously wetter soils,but this correlation was negative at the site with previously drier *** found no signific

关键词： seedling emergence soil biota range shift ecotone aster cordifolius

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