NDLI: Nutrient dynamics along a precipitation gradient in European beech forests

Content Provider	Springer Nature Link
Author	Meier, Ina C. Leuschner, Christoph
Copyright Year	2014
Abstract	Precipitation as a key determinant of forest productivity influences forest ecosystems also indirectly through alteration of the nutrient status of the soil, but this interaction is not well understood. Along a steep precipitation gradient, we studied the consequences of reduced precipitation for the soil and biomass nutrient pools and dynamics in 14 mature European beech (Fagus sylvatica L.) forests on Triassic sandstone. We tested the hypotheses that lowered summer precipitation (1) is associated with less acid soils and (2) a reduced accumulation of organic matter on the forest floor, and (3) reduces nutrient supply from the soil and leads to decreasing foliar and root nutrient concentrations. Soil acidity, the amount of forest floor organic matter, and the associated organic matter N and P pools decreased to about a half from wet to dry sites; the C/P and N/P ratios, but not the C/N ratio, of forest floor organic matter were reduced as well. Net N mineralization and P and K pools in the mineral soil did not change with decreasing precipitation. Foliar P and K concentrations (beech sun leaves) increased while N remained constant, resulting in decreasing foliar N/P and N/K ratios. Estimated N resorption efficiency increased toward the dry sites. We conclude that a reduction in summer rainfall significantly reduces the soil C, N and P pools but does not result in decreasing foliar N and P contents in beech. However, the decreasing foliar N/P ratios towards the dry stands indicate that the importance of P limitation for tree growth declines with decreasing precipitation.
Starting Page	51
Ending Page	69
Page Count	19
File Format	PDF
ISSN	01682563
Journal	Biogeochemistry
Volume Number	120
Issue Number	1-3
e-ISSN	1573515X
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-04-17
Publisher Place	Cham
Access Restriction	Subscribed
Subject Keyword	δ15N signature Fagus sylvatica Leaf litter N/P ratio Resorption efficiency Soil acidity Biogeosciences Ecosystems Environmental Chemistry Life Sciences
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Environmental Chemistry Water Science and Technology

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