Gerold, Gerhard

[["dc.bibliographiccitation.firstpage","168"],["dc.bibliographiccitation.journal","Geoderma"],["dc.bibliographiccitation.lastpage","175"],["dc.bibliographiccitation.volume","170"],["dc.contributor.author","Heitkamp, Felix"],["dc.contributor.author","Wendland, Matthias"],["dc.contributor.author","Offenberger, Konrad"],["dc.contributor.author","Gerold, Gerhard"],["dc.date.accessioned","2018-11-07T09:14:23Z"],["dc.date.available","2018-11-07T09:14:23Z"],["dc.date.issued","2012"],["dc.description.abstract","Effects of fertilisation and cropland management on soil organic carbon (SOC) dynamics can be assessed best in long-term experiments. Using data from the long-term fertilisation experiment in Puch, Germany (part of the series \"Internationale Organische Stickstoff Dauerversuche\", IOSDV), we tested the performance of the Rothamsted Carbon Model 26.3 (RothC). The objectives of this work were: (i) quantify the C-input and the efficiency of SOC stabilisation, (ii) test the performance of different input estimates on predictive power of the RothC and (iii) test implementations of residue quality and C-saturation on model predictions. The experiment is a full-factorial strip design, the factors being \"organic amendment\" and \"level of N-fertiliser\". Each treatment was replicated three times. The crop rotation is silage maize-winter wheat-winter barley. Five levels of the factor \"organic amendment\" were considered: (i) CON: no organic amendment; (ii) SLU: slurry application (on average 0.8 Mg C ha(-1) year(-1)); (iii) FYM: application of farmyard manure (30 to 40 Mg ha(-1) fresh mass every third year to maize, on average 1.0 Mg C ha(-1) year(-1)). (iv) STR: straw incorporation after harvest of wheat and barley (depending on straw yield on average 0.7 to 2.2 Mg C ha(-1) year(-1)): (v) STSL: slurry application plus straw incorporation (on average 1.1 to 2.4 Mg C ha(-1) year(-1)). All treatments (including CON) were combined with five different levels of N-fertilisation (N0 to N4), whereas N0 was nil N application and N4 averaged 177 kg N ha(-1) year(-1). N-rates increased gradually and differed depending on the crop. Starting values for SOC stocks (Mg hat) were measured in 1983 as a mean among N-rates for organic amendment treatments (CON: 42; SLU: 39.8; FYM: 40.5; STR 39.8; STSL: 40.5). SOC stocks (0-25 cm) in 2004 (35.5 to 46.6 Mg C ha(-1)) were in the order STSL> FYM = SLU > STR = CON (p <= 0.001). However, slightly different starting values indicated a higher loss of SOC after 21 years in the CON (11-14%) compared to the SIR treatments (1-10%). Effect of N-rate was not significant. The observed relation between change of SOC and C-input was quadratic (Y-O = -13.4 + 7.5x - 0.9x(2); R-2 = 0.74, p <= 0.001), which contrasted the linear relationship predicted by RothC (Y-P = -12.9 + 5.5x; R-2 = 0.97, p <= 0.0001). Serious deviation between observed and predicted relationship occurred above C-inputs of 2.5 Mg C ha(-1) year(-1). Mechanistic explanation (e.g. C-saturation or increased mineralisation by N-fertilisation) for the observation needs further exploration, but implication on regional estimates for C-accumulation for different cropland management scenarios is obvious: potential gain in SOC storage by increasing C-inputs may be overestimated, at least under conditions of the Puch site. Independent model predictions (i.e. no parameter adjustment and independent estimation and measurement of C-input) were successful for treatments without straw incorporation (CON, SLU, FYM). Using a regression between crop yields and crop residue input yielded better results than using a constant belowground-to-aboveground biomass ratio. SOC stocks of treatments STR and STSL were seriously overestimated by the model. Using a higher decomposability of crop residue improved result only marginally and required the change of a standard parameter. Using a simple implementation of C-saturtion improved predictions for STR and STSL but failed to simulate dynamics in all other treatments. Overall, our results showed that it is important to recognise that relation between SOC change and C-input is not necessarily linear. However, the RothC model predicted SOC dynamics well at lower input levels. Observation that a regression equation for input estimation is superior to a constant biomass ratio for modelling purposes has to be tested further. An implementation of residue quality or saturation capacity in the RothC model may be promising for a better mechanistic understanding of SOC dynamics. However, this requires careful calibration and will increase the number of parameters to be fitted. (C) 2011 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","Bayrische Landesanstalt fur Landwirtschaft, state of Bavaria, Germany"],["dc.identifier.doi","10.1016/j.geoderma.2011.11.005"],["dc.identifier.isi","000300743100020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27394"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0016-7061"],["dc.title","Implications of input estimation, residue quality and carbon saturation on the predictive power of the Rothamsted Carbon Model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","19"],["dc.bibliographiccitation.journal","Forest Policy and Economics"],["dc.bibliographiccitation.lastpage","28"],["dc.bibliographiccitation.volume","83"],["dc.contributor.author","Loaiza, T."],["dc.contributor.author","Borja, M.O."],["dc.contributor.author","Nehren, U."],["dc.contributor.author","Gerold, G."],["dc.date.accessioned","2020-12-10T14:24:07Z"],["dc.date.available","2020-12-10T14:24:07Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1016/j.forpol.2017.05.005"],["dc.identifier.issn","1389-9341"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72149"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Analysis of land management and legal arrangements in the Ecuadorian Northeastern Amazon as preconditions for REDD+ implementation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","109"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Erdkunde"],["dc.bibliographiccitation.lastpage","122"],["dc.bibliographiccitation.volume","67"],["dc.contributor.author","Köhler, Stefan"],["dc.contributor.author","Jungkunst, Hermann F."],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Gerold, Gerhard"],["dc.date.accessioned","2018-11-07T09:26:10Z"],["dc.date.accessioned","2020-05-11T13:17:09Z"],["dc.date.available","2018-11-07T09:26:10Z"],["dc.date.available","2020-05-11T13:17:09Z"],["dc.date.issued","2013"],["dc.description.abstract","Deposition rates in remote areas due to anthropogenic emissions are increasing in Asian countries and elsewhere. The burning of biomass in slash-and-burn activities, in addition to burning fossil fuel result in higher rates of atmospheric deposition at forest and agricultural sites. An investigation of bulk depositions in Central Sulawesi was conducted at 13 field sites along a land use cover gradient that included natural and unused sites, slash-and-burn sites, and consolidated agricultural systems around and in the Lore Lindu National Park, an area of more than 2310 km(2). Bulk depositions rates were measured with passive ion exchange collectors. Our results show that Central Sulawesi generally experiences low deposition rates. Depositions that originate mainly from anthropogenic sources, such as nitrate, are very low, i.e. between 0.1 and 0.8 kg ha(-1) a(-1), but increase to 2.4 nitrate kg ha(-1) a(-1) near slash-and-burn areas. Similar patterns were found for elements such as potassium and calcium. Indeterminate depositions were found for geogenic elements such as iron, manganese and aluminium and in some cases phosphorus. A principal component analysis allowed differentiation between the contributions of different sources and different element to the total deposition impact in most cases. Specific deposition rates were recorded for different land use systems. The main factor that generated different deposition patterns was biomass burning resulting from slash-and-burn activities. The latter determined the composition of atmospheric depositions of nearby sites, but the more distant sites inside the national park do not appear to be influenced by these anthropogenic activities yet."],["dc.description.sponsorship","German Research Foundation (DFG) [SFB 552]"],["dc.identifier.doi","10.3112/erdkunde.2013.02.01"],["dc.identifier.isi","000324807900001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65017"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0014-0015"],["dc.title","The effects of land use change on atmospheric nutrientdeposition in Central Sulawesi"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4973"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Proceedings of the National Academy of Sciences"],["dc.bibliographiccitation.lastpage","4978"],["dc.bibliographiccitation.volume","104"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Barkmann, Jan"],["dc.contributor.author","Bos, Merijn M."],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Faust, Heiko"],["dc.contributor.author","Gerold, Gerhard"],["dc.contributor.author","Glenk, Klaus"],["dc.contributor.author","Gradstein, S. Robbert"],["dc.contributor.author","Guhardja, Edi"],["dc.contributor.author","Harteveld, Marieke"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Höhn, Patrick"],["dc.contributor.author","Kappas, Martin"],["dc.contributor.author","Köhler, Stefan"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Maertens, Miet"],["dc.contributor.author","Marggraf, Rainer"],["dc.contributor.author","Migge-Kleian, Sonja"],["dc.contributor.author","Mogea, Johanis"],["dc.contributor.author","Pitopang, Ramadhanil"],["dc.contributor.author","Schaefer, Matthias"],["dc.contributor.author","Schwarze, Stefan"],["dc.contributor.author","Sporn, Simone G."],["dc.contributor.author","Steingrebe, Andrea"],["dc.contributor.author","Tjitrosoedirdjo, Sri Sudarmiyati"],["dc.contributor.author","Tjitrosoemito, Soekisman"],["dc.contributor.author","Twele, André"],["dc.contributor.author","Weber, Robert"],["dc.contributor.author","Woltmann, Lars"],["dc.contributor.author","Zeller, Manfred"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:44:51Z"],["dc.date.accessioned","2020-05-11T13:28:11Z"],["dc.date.available","2017-09-07T11:44:51Z"],["dc.date.available","2020-05-11T13:28:11Z"],["dc.date.issued","2007"],["dc.description.abstract","Losses of biodiversity and ecosystem functioning due to rainforest destruction and agricultural intensification are prime concerns for science and society alike. Potentially, ecosystems show nonlinear responses to land-use intensification that would open management options with limited ecological losses but satisfying economic gains. However, multidisciplinary studies to quantify ecological losses and socioeconomic tradeoffs under different management options are rare. Here, we evaluate opposing land use strategies in cacao agroforestry in Sulawesi, Indonesia, by using data on species richness of nine plant and animal taxa, six related ecosystem functions, and on socioeconomic drivers of agroforestry expansion. Expansion of cacao cultivation by 230% in the last two decades was triggered not only by economic market mechanisms, but also by rarely considered cultural factors. Transformation from near-primary forest to agroforestry had little effect on overall species richness, but reduced plant biomass and carbon storage by ≈75% and species richness of forest-using species by ≈60%. In contrast, increased land use intensity in cacao agroforestry, coupled with a reduction in shade tree cover from 80% to 40%, caused only minor quantitative changes in biodiversity and maintained high levels of ecosystem functioning while doubling farmers' net income. However, unshaded systems further increased income by ≈40%, implying that current economic incentives and cultural preferences for new intensification practices put shaded systems at risk. We conclude that low-shade agroforestry provides the best available compromise between economic forces and ecological needs. Certification schemes for shade-grown crops may provide a market-based mechanism to slow down current intensification trends."],["dc.identifier.doi","10.1073/pnas.0608409104"],["dc.identifier.gro","3148984"],["dc.identifier.scopus","2-s2.0-34247633507"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5623"],["dc.identifier.url","http://www.scopus.com/inward/record.url?eid=2-s2.0-34247633507&partnerID=MN8TOARS"],["dc.language.iso","en"],["dc.notes.intern","Faust Crossref Import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.eissn","1091-6490"],["dc.relation.issn","0027-8424"],["dc.title","Tradeoffs between income, biodiversity, and ecosystem functioning during tropical rainforest conversion and agroforestry intensification"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","177"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Erdkunde"],["dc.bibliographiccitation.lastpage","193"],["dc.bibliographiccitation.volume","71"],["dc.contributor.author","Schönenberg, Regine"],["dc.contributor.author","Boy, Jens"],["dc.contributor.author","Hartberger, Korbinian"],["dc.contributor.author","Schumann, Charlotte"],["dc.contributor.author","Guggenberger, Georg"],["dc.contributor.author","Siebold, Matthias"],["dc.contributor.author","Lakes, Tobia"],["dc.contributor.author","Lamparter, Gabriele"],["dc.contributor.author","Schindewolf, Marcus"],["dc.contributor.author","Schaldach, Rüdiger"],["dc.contributor.author","Nendel, Claas"],["dc.contributor.author","Hohnwald, Stefan"],["dc.contributor.author","Meurer, Katharina H. E."],["dc.contributor.author","Gerold, Gerhard"],["dc.contributor.author","Klingler, Michael"],["dc.date.accessioned","2020-12-10T18:43:57Z"],["dc.date.available","2020-12-10T18:43:57Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.3112/erdkunde.2017.03.02"],["dc.identifier.issn","0014-0015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78276"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Experiences of inter- and transdisciplinary research – a trajectory of knowledge integration within a large research consortium"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3"],["dc.bibliographiccitation.lastpage","7"],["dc.bibliographiccitation.volume","377"],["dc.contributor.author","Nóbrega, Rodolfo Luiz Bezerra"],["dc.contributor.author","Lamparter, Gabriele"],["dc.contributor.author","Hughes, Harold"],["dc.contributor.author","Guzha, Alphonce Chenjerayi"],["dc.contributor.author","Amorim, Ricardo Santos Silva"],["dc.contributor.author","Gerold, Gerhard"],["dc.contributor.editor","Mahe, G."],["dc.contributor.editor","Heal, K."],["dc.contributor.editor","Gupta, A. B."],["dc.contributor.editor","Aksoy, H."],["dc.date.accessioned","2020-12-10T18:47:54Z"],["dc.date.available","2020-12-10T18:47:54Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.5194/piahs-377-3-2018"],["dc.identifier.eissn","2199-899X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78940"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.conference","IAHS Scientific Assembly 2017"],["dc.relation.eventend","2017-07-14"],["dc.relation.eventlocation","Port Elizabeth, South Africa"],["dc.relation.eventstart","2017-07-10"],["dc.relation.ispartof","Water quality and sediment transport issues in surface water"],["dc.title","A multi-approach and multi-scale study on water quantity and quality changes in the Tapajós River basin, Amazon"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","194008291877108"],["dc.bibliographiccitation.journal","Tropical Conservation Science"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Gómez-Díaz, Jorge Antonio"],["dc.contributor.author","Brast, Kristina"],["dc.contributor.author","Degener, Jan"],["dc.contributor.author","Krömer, Thorsten"],["dc.contributor.author","Ellis, Edward"],["dc.contributor.author","Heitkamp, Felix"],["dc.contributor.author","Gerold, Gerhard"],["dc.date.accessioned","2020-12-10T18:38:38Z"],["dc.date.available","2020-12-10T18:38:38Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1177/1940082918771089"],["dc.identifier.eissn","1940-0829"],["dc.identifier.issn","1940-0829"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77394"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Long-Term Changes in Forest Cover in Central Veracruz, Mexico (1993–2014)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","438"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Wood Chemistry and Technology"],["dc.bibliographiccitation.lastpage","449"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Koehler, S."],["dc.contributor.author","Levia, D. F."],["dc.contributor.author","Jungkunst, Hermann F."],["dc.contributor.author","Gerold, Gerhard"],["dc.date.accessioned","2018-11-07T10:02:54Z"],["dc.date.available","2018-11-07T10:02:54Z"],["dc.date.issued","2015"],["dc.description.abstract","Bark pH is an essential parameter which partly governs the chemistry of the bark as well as its suitability as a microhabitat to a wide range of epiphytic organisms. Bark pH is known to vary with tree species, epiphytic cover, stemflow channelization, and anthropogenic influences. To date, reliable methods to quantify the spatial and temporal dimensions of bark pH have remained elusive. The aim of the present study was to develop and validate an in situ method to measure the surface pH of bark with high spatial resolution. Agar-agar panels, prepared with a pH indicator, were used to quantify and map the spatial variation of bark pH for cacao trees in Indonesia. Fine-scale changes of bark pH were clearly detectable and quantifiable with our bark pH mapping method. Bark pH was found to vary as a function of bark microrelief and the presence of epiphytes. The use of pH reference panels validated the bark pH measurements obtained from our method. The bark pH measurement method developed, described, and validated in this article is inexpensive and straightforward. It has the potential for wide adoption by scientists across disciplines who are interested in bark pH and its effect on life in the cortisphere. Unlike conventional methods to measure bark pH in deionized water or KCl extracts, our method is able to identify fine-scale spatial changes in bark pH that are relevant for the colonization of bark by organisms."],["dc.description.sponsorship","German Research Foundation (DFG) [SFB 552.]"],["dc.identifier.doi","10.1080/02773813.2015.1025285"],["dc.identifier.isi","000362649600005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38329"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Taylor & Francis Inc"],["dc.relation.issn","1532-2319"],["dc.relation.issn","0277-3813"],["dc.title","AN IN SITU METHOD TO MEASURE AND MAP BARK PH"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","259"],["dc.bibliographiccitation.journal","Science of The Total Environment"],["dc.bibliographiccitation.lastpage","274"],["dc.bibliographiccitation.volume","635"],["dc.contributor.author","Nóbrega, Rodolfo L.B."],["dc.contributor.author","Guzha, Alphonce C."],["dc.contributor.author","Lamparter, Gabriele"],["dc.contributor.author","Amorim, Ricardo S.S."],["dc.contributor.author","Couto, Eduardo G."],["dc.contributor.author","Hughes, Harold J."],["dc.contributor.author","Jungkunst, Hermann F."],["dc.contributor.author","Gerold, Gerhard"],["dc.date.accessioned","2020-12-10T15:21:12Z"],["dc.date.available","2020-12-10T15:21:12Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.scitotenv.2018.03.356"],["dc.identifier.issn","0048-9697"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72947"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Impacts of land-use and land-cover change on stream hydrochemistry in the Cerrado and Amazon biomes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","91"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Regional Environmental Change"],["dc.bibliographiccitation.lastpage","103"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Lamparter, Gabriele"],["dc.contributor.author","Nobrega, Rodolfo Luiz Bezerra"],["dc.contributor.author","Kovacs, Kristof"],["dc.contributor.author","Amorim, Ricardo Santos"],["dc.contributor.author","Gerold, Gerhard"],["dc.date.accessioned","2020-12-10T14:11:11Z"],["dc.date.available","2020-12-10T14:11:11Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1007/s10113-016-1015-2"],["dc.identifier.eissn","1436-378X"],["dc.identifier.issn","1436-3798"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70992"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Modelling hydrological impacts of agricultural expansion in two macro-catchments in Southern Amazonia, Brazil"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]