000			01908nam a2200253Ia 4500
008			220216s9999 xx 000 0 und d
100			_aArndal MF
245		0	_aNet root growth and nutrient acquisition in response to predicted climate change in two contrasting healthland species
260			_bPlant and Soil _c2013
300			_a615-629
520			_aBackground and aims: Accurate predictions of nutrient acquisition by plant roots and mycorrhizas are critical in modelling plant responses to climate change. Methods: We conducted a field experiment with the aim to investigate root nutrient uptake in a future climate and studied root production by ingrowth cores, mycorrhizal colonization, and fine root N and P uptake by root assay of Deschampsia flexuosaand Calluna vulgaris.Results: Net root growth increased under elevated CO2, warming and drought, with additive effects among the factors. Arbuscular mycorrhizal colonization increased in response to elevated CO2, while ericoid mycorrhizal colonization was unchanged. The uptake of N and P was not increased proportionally with root growth after 5 years of treatment. Conclusion: While aboveground biomass was unchanged, the root growth was increased under elevated CO2. The results suggest that plant production may be limited by N (but not P) when exposed to elevated CO2. The species-specific response to the treatments suggests different sensitivity to global change factors, which could result in changed plant competitive interactions and belowground nutrient pool sizes in response to future climate change.
650			_aArbuscular mycorrhiza
650			_aCalluna vulgaris
650			_aClimat change
650			_aEricoid mycorrhiza
650			_aFace
650			_aIngrowth core
700			_aBeier C
700			_aMerrild MP
700			_aMichelsen A
700			_aMikkelsen TN
700			_aSchmidt IK
942			_cJS
999			_c63727 _d63727