Erratum to An indepth look into a tropical lowla

Authors: Birgit Koehler Marife D Corre Kristin Steger Reinhard Well Erwin Zehe Juvia P Sueta Edzo Veldkamp

Publish Date: 2012/08/24

Volume: 111, Issue: 1-3, Pages: 715-717

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Abstract

In the calculations of the depthintegrated areabased gas contents in soil air and water we conducted a mistake by summing up the volumebased gas contents and multiplying them with the volumes of the topsoil and subsoil This resulted in overestimations of the respective values in Table 2 We corrected the integration over depth using the trapezoidal rule and give the resulting values in the corrected Table 2 A few slight changes in the result paragraphs about the soil gaseous contents are highlighted in bold font in the text below and the reader is asked to refer to these instead of to the ones in the article We may not anymore support the statement in the abstract that ‘the pronounced seasonality in soil respiration was largely attributable to enhanced topsoil respiration’ because in the corrected analysis also the subsoil CO2C contents in the soil air of the control plots were larger during wet than dry season and the fractions of CO2C contents in the topsoil were not consistently larger during wet than dry season as previously the case The respective three sentences in the discussion about the dynamics of carbon dioxide in the control plots ie ‘Soil respiration in the studied lowland forest’ to ‘as well as fine root growth biomass and turnover during wet than dry season at our site’ are therefore not anymore valid Also in the second to last sentence of the discussion section about methane the information in brackets is not anymore valid but this does not change the interpretation Apart from these the results interpretations and conclusions remain unchanged throughout the articleLongterm Naddition did not affect dryseason soil N2ON contents increased wetseason soil N2ON contents did not affect 15N signatures of NO 3 − and reduced wetseason 15N signatures of N2O compared to the control plots … The Naddition plots showed reduced dryseason topsoil CH4C contents and threshold CH4 concentrations were reached at a shallower depth compared to the control plots revealing an Ninduced stimulation of methanotrophic activityIn both treatments N 2 ON contents were generally larger during wet than dry season P  0047 except for the contents in topsoil air in the control plots with P = 0729 Table 2 Dryseason N2ON contents did not differ between treatments but wetseason N2ON contents were larger in the Naddition compared to the control plots in soil air P  0039 and in subsoil water P = 0009 The fractions of N2ON contents located in the topsoil did not differ seasonally in either the control or Naddition plots During dry season the N 2 ON fractions located in the topsoil were larger in the control than in the Naddition plots P = 0039 Table  2 In both treatments and seasons the water phase contained 52–60  of the overall soil N2ON contents Table 2In both treatments topsoil CO 2 C contents were larger during wet than dry season P  0044 The same was the case for the subsoil of the control plots P  0021 and albeit not significant on the 5  significance level a similar trend appeared in the subsoil of the Naddition plots P = 0089 in air and P = 0052 in water Seasonal soil CO2C contents were unaffected by Naddition Table 2 In the control plots the fractions of CO 2 C content located in the topsoil water were larger during wet than dry season P = 0044 They did not differ seasonally in the subsoil water or in soil air and did not differ in any season or depth in the Naddition plots or between treatments In both treatments and seasons the water phase contained 64–69  of the overall soil CO2C contents Table 2

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