Albert, Matthias

[["dc.bibliographiccitation.firstpage","733"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Reproduction"],["dc.bibliographiccitation.lastpage","742"],["dc.bibliographiccitation.volume","140"],["dc.contributor.author","Albert, S"],["dc.contributor.author","Ehmcke, J"],["dc.contributor.author","Wistuba, J"],["dc.contributor.author","Eildermann, K"],["dc.contributor.author","Behr, R"],["dc.contributor.author","Schlatt, S"],["dc.contributor.author","Gromoll, J"],["dc.date.accessioned","2022-10-06T13:26:26Z"],["dc.date.available","2022-10-06T13:26:26Z"],["dc.date.issued","2010"],["dc.description.abstract","The seminiferous epithelium in the nonhuman primate\r\n Callithrix jacchus\r\n is similarly organized to man. This monkey has therefore been used as a preclinical model for spermatogenesis and testicular stem cell physiology. However, little is known about the developmental dynamics of germ cells in the postnatal primate testis. In this study, we analyzed testes of newborn, 8-week-old, and adult marmosets employing immunohistochemistry using pluripotent stem cell and germ cell markers\r\n DDX4\r\n (\r\n VASA\r\n ),\r\n POU5F1\r\n (\r\n OCT3/4\r\n ), and\r\n TFAP2C\r\n (\r\n AP-2\r\n γ\r\n ). Stereological and morphometric techniques were applied for quantitative analysis of germ cell populations and testicular histological changes. Quantitative RT-PCR (qRT-PCR) of testicular mRNA was applied using 16 marker genes establishing the corresponding profiles during postnatal testicular development. Testis size increased during the first 8 weeks of life with the main driver being longitudinal outgrowth of seminiferous cords. The number of DDX4-positive cells per testis doubled between birth and 8 weeks of age whereas TFAP2C- and POU5F1-positive cells remained unchanged. This increase in DDX4-expressing cells indicates dynamic growth of the differentiated A-spermatogonial population. The presence of cells expressing POU5F1 and TFAP2C after 8 weeks reveals the persistence of less differentiated germ cells. The mRNA and protein profiles determined by qRT-PCR and western blot in newborn, 8-week-old, and adult marmosets corroborated the immunohistochemical findings. In conclusion, we demonstrated the presence of distinct spermatogonial subpopulations in the primate testis exhibiting different dynamics during early testicular development. Our study demonstrates the suitability of the marmoset testis as a model for human testicular development."],["dc.identifier.doi","10.1530/REP-10-0235"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/115088"],["dc.notes.intern","DOI-Import GROB-602"],["dc.relation.eissn","1741-7899"],["dc.relation.issn","1470-1626"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.title","Germ cell dynamics in the testis of the postnatal common marmoset monkey (Callithrix jacchus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Forest Ecosystems"],["dc.bibliographiccitation.volume","2"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","Hansen, Jan"],["dc.contributor.author","Nagel, Jürgen"],["dc.contributor.author","Schmidt, Matthias"],["dc.contributor.author","Spellmann, Hermann"],["dc.date.accessioned","2022-11-04T10:55:29Z"],["dc.date.available","2022-11-04T10:55:29Z"],["dc.date.issued","2015"],["dc.description.abstract","Background\r\n\r\nForest management faces a climate induced shift in growth potential and increasing current and emerging new risks. Vulnerability analysis provides decision support based on projections of natural resources taking risks and uncertainties into account. In this paper we (1) characterize differences in forest dynamics under three management scenarios, (2) analyse the effects of the three scenarios on two risk factors, windthrow and drought stress, and (3) quantify the effects and the amount of uncertainty arising from climate projections on height increment and drought stress.\r\nMethods\r\n\r\nIn four regions in northern Germany, we apply three contrasting management scenarios and project forest development under climate change until 2070. Three climate runs (minimum, median, maximum) based on the emission scenario RCP 8.5 control the site-sensitive forest growth functions. The minimum and maximum climate run define the range of prospective climate development.\r\nResults\r\n\r\nThe projections of different management regimes until 2070 show the diverging medium-term effects of thinnings and harvests and long-term effects of species conversion on a regional scale. Examples of windthrow vulnerability and drought stress reveal how adaptation measures depend on the applied management path and the decision-maker’s risk attitude. Uncertainty analysis shows the increasing variability of drought risk projections with time. The effect of climate projections on height growth are quantified and uncertainty analysis reveals that height growth of young trees is dominated by the age-trend whereas the climate signal in height increment of older trees is decisive.\r\nConclusions\r\n\r\nDrought risk is a serious issue in the eastern regions independent of the applied silvicultural scenario, but adaptation measures are limited as the proportion of the most drought tolerant species Scots pine is already high. Windthrow risk is no serious overall threat in any region, but adequate counter-measures such as species conversion, species mixture or reduction of target diameter can be taken. This simulation study of three silvicultural scenarios and three climate runs spans a decision space of potential forest development to be used for decision making. Which adaptation measures to counteract climate induced risks and uncertainty are to be taken is, however, a matter of individual risk attitude."],["dc.identifier.doi","10.1186/s40663-015-0036-5"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116943"],["dc.identifier.url","http://dx.doi.org/10.1186/s40663-015-0036-5"],["dc.language.iso","en"],["dc.relation.issn","2197-5620"],["dc.relation.orgunit","Nordwestdeutsche Forstliche Versuchsanstalt"],["dc.rights","CC BY 4.0"],["dc.title","Assessing risks and uncertainties in forest dynamics under different management scenarios and climate change"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","11"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Forest Ecosystems"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Daume, Stefan"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","von Gadow, Klaus"],["dc.date.accessioned","2019-07-09T11:40:37Z"],["dc.date.available","2019-07-09T11:40:37Z"],["dc.date.issued","2014"],["dc.description.abstract","Background With mounting global environmental, social and economic pressures the resilience and stability of forests and thus the provisioning of vital ecosystem services is increasingly threatened. Intensified monitoring can help to detect ecological threats and changes earlier, but monitoring resources are limited. Participatory forest monitoring with the help of “citizen scientists” can provide additional resources for forest monitoring and at the same time help to communicate with stakeholders and the general public. Examples for citizen science projects in the forestry domain can be found but a solid, applicable larger framework to utilise public participation in the area of forest monitoring seems to be lacking. We propose that a better understanding of shared and related topics in citizen science and forest monitoring might be a first step towards such a framework. Methods We conduct a systematic meta-analysis of 1015 publication abstracts addressing “forest monitoring” and “citizen science” in order to explore the combined topical landscape of these subjects. We employ ‘topic modelling’, an unsupervised probabilistic machine learning method, to identify latent shared topics in the analysed publications. Results We find that large shared topics exist, but that these are primarily topics that would be expected in scientific publications in general. Common domain-specific topics are under-represented and indicate a topical separation of the two document sets on “forest monitoring” and “citizen science” and thus the represented domains. While topic modelling as a method proves to be a scalable and useful analytical tool, we propose that our approach could deliver even more useful data if a larger document set and full-text publications would be available for analysis. Conclusions We propose that these results, together with the observation of non-shared but related topics, point at under-utilised opportunities for public participation in forest monitoring. Citizen science could be applied as a versatile tool in forest ecosystems monitoring, complementing traditional forest monitoring programmes, assisting early threat recognition and helping to connect forest management with the general public. We conclude that our presented approach should be pursued further as it may aid the understanding and setup of citizen science efforts in the forest monitoring domain."],["dc.format.extent","12"],["dc.identifier.doi","10.1186/s40663-014-0011-6"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11149"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58216"],["dc.language.iso","en"],["dc.relation.issn","2197-5620"],["dc.rights.access","openAccess"],["dc.title","Assessing citizen science opportunities in forest monitoring using probabilistic topic modelling"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","9"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","20"],["dc.bibliographiccitation.volume","316"],["dc.contributor.author","Daume, Stefan"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","von Gadow, Klaus"],["dc.date.accessioned","2018-11-07T09:42:32Z"],["dc.date.available","2018-11-07T09:42:32Z"],["dc.date.issued","2014"],["dc.description.abstract","Forest monitoring captures human impacts and other biotic and abiotic influences on forests and is a prerequisite for the sustainable use and protection of forest ecosystems. Forest inventories for example are a key tool to plan sustainable harvesting, whereas Forest Observational Studies provide the empirical basis for an improved understanding and long-term evaluation of forest ecosystem dynamics. To that end detailed data is collected at stand level, often integrated in larger forest observational networks, which feeds into forest ecosystem models. Forests exist however in a constantly changing societal context and the direct or indirect impact of human activity has become a crucial driver on all types of ecosystems. The Millenium Ecosystem Assessment underlines the linkage between social and ecological systems, highlighting the centrality of ecosystem services to human well-being and the requirement for ecosystem monitoring in the \"anthropocene\" to provide a holistic view of ecosystems as social-ecological systems. Framing information about the social context of a forest ecosystem, gaining the expertise and providing resources to collect this type of information is usually outside the scope of data collection for forest inventories and monitoring. Studies in other domains faced a similar challenge and turned to data mining informal online information sources to supplement traditional monitoring and data collection strategies. This paper explores how forest monitoring approaches especially Forest Observational Studies with their long-term and large-scale focus may be complemented by social media mining. We outline (a) how social media mining methods from other domains could be applied to forest monitoring, (b) discuss identification of stakeholders, events and demands on forest ecosystems as examples of social contextual information that could be obtained via this route and (c) explain how this information could be automatically mined from social media, online news and other similar online information sources. The proposed approach is discussed on the basis of examples from a broad set of other domains. (c) 2013 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.foreco.2013.09.004"],["dc.identifier.isi","000332906500003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33977"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-7042"],["dc.relation.issn","0378-1127"],["dc.title","Forest monitoring and social media - Complementary data sources for ecosystem surveillance?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","363"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Albert, Matthias"],["dc.date.accessioned","2022-11-07T10:07:01Z"],["dc.date.available","2022-11-07T10:07:01Z"],["dc.date.issued","2017"],["dc.description.abstract","Rapid climate change leads to significant shifts in the site-productivity relationship of tree species and alters abiotic and biotic risks well beyond classical rotation ages on many forest sites worldwide. Forest conversion may be an adequate measure to counter possible negative effects of climate change. Unfortunately, climate-driven changes in abiotic and biotic risks bear a significant source of intrinsic uncertainty inherent in climate projections. It is our goal to appraise uncertainty in species selection under drought stress, one of the most important risk factors for many forests. We derive a method to assess drought restrictions and demonstrate the uncertainty in the process of species selection by applying three climate scenarios. Furthermore, we interpret the consequences of climate uncertainty in the light of different management goals, i.e., a business-as-usual silviculture, a climate protection strategy favoring CO2 sequestration and a biodiversity strategy increasing diversity. The methods are applied to two representative regions in the North German Plain. The results clearly show the strong need for adaptive planning when drought restrictions are considered. However, different silvicultural management objectives may alter the extent of adaptive planning. The uncertainty in the planning process arising from different underlying climate projections strongly depends on the regional site characteristics and on forest management strategy. In conclusion, it is most important in forest planning to clearly state the management goals and to carefully explore if the goals can be met under climate change and if the uncertainty due to climate projections significantly affects the results of species selection."],["dc.identifier.doi","10.3390/f8100363"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116965"],["dc.identifier.url","http://www.mdpi.com/1999-4907/8/10/363"],["dc.language.iso","en"],["dc.relation.issn","1999-4907"],["dc.relation.orgunit","Nordwestdeutsche Forstliche Versuchsanstalt"],["dc.rights","CC BY 4.0"],["dc.title","Tree Species Selection in the Face of Drought Risk—Uncertainty in Forest Planning"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","AFZ, der Wald"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","Nagel, Jürgen"],["dc.contributor.author","Schmidt, Matthias"],["dc.contributor.author","Nagel, Ralf-Volker"],["dc.contributor.author","Spellmann, Hermann"],["dc.date.accessioned","2022-11-07T10:03:43Z"],["dc.date.available","2022-11-07T10:03:43Z"],["dc.date.issued","2022"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116944"],["dc.language.iso","en"],["dc.relation.orgunit","Nordwestdeutsche Forstliche Versuchsanstalt"],["dc.title","Eine neue Generation von Ertragstafeln"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","30"],["dc.bibliographiccitation.journal","Ecological Modelling"],["dc.bibliographiccitation.lastpage","47"],["dc.bibliographiccitation.volume","346"],["dc.contributor.author","Thiele, Jan Christoph"],["dc.contributor.author","Nuske, Robert S."],["dc.contributor.author","Ahrends, Bernd"],["dc.contributor.author","Panferov, Oleg"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","Staupendahl, Kai"],["dc.contributor.author","Junghans, Udo"],["dc.contributor.author","Jansen, Martin"],["dc.contributor.author","Saborowski, Joachim"],["dc.date.accessioned","2018-11-07T10:27:13Z"],["dc.date.available","2018-11-07T10:27:13Z"],["dc.date.issued","2017"],["dc.description.abstract","Projected climate change implies that site conditions can no longer be expected to remain constant over a tree's lifetime. The fast and complex changes in site characteristics and growth patterns diminish the value of traditional knowledge and profoundly alter the conditions of forest management. One way to tackle the inherent uncertainties are simulation studies addressing these new dynamics and mechanisms. The aim of this study is to present such a simulation model system comprising various established and validated process-based and statistical models assessing the complex and dynamic response of a forest stand to climate change. For a given climate scenario, these coupled models estimate the potential growth and yield and various risks considering changing site and stand conditions. As an example, the model system is applied to managed forest stands of Norway spruce (Picea abies (L) H. Karst.) in a forest district located in central western Germany. For the changing climate conditions according to SRES B1 and A1 B, the model results suggest a positive effect on the site index and, by contrast, a negative impact on tree survival of increasing risks regarding drought stress mortality, wind damage, and bark beetle infestation given the climate change scenario. The annual contribution margin of timber production under consideration of damage risks by drought stress mortality, wind, and bark beetle infestation reveals that, in this case, the increased growth is able to compensate for the higher risks with few exceptions. Furthermore, we discuss the advantages and challenges of employing a dynamic complex simulation model system for climate change impact assessment based on high-resolution climate data. (C) 2016 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.ecolmodel.2016.11.013"],["dc.identifier.isi","000393248900004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43203"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","1872-7026"],["dc.relation.issn","0304-3800"],["dc.relation.orgunit","Abteilung Ökoinformatik, Biometrie und Waldwachstum"],["dc.title","Climate change impact assessment-A simulation experiment with Norway spruce for a forest district in Central Europe"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Forest Ecosystems"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","Nagel, Ralf-Volker"],["dc.contributor.author","Sutmöller, Johannes"],["dc.contributor.author","Schmidt, Matthias"],["dc.date.accessioned","2022-10-25T08:41:49Z"],["dc.date.available","2022-10-25T08:41:49Z"],["dc.date.issued","2018"],["dc.description.abstract","Forest management decisions are based on expectations of future developments. For sound decisions it is essential to accurately predict the expected values in future developments and to account for their inherent uncertainty, for example the impact of climate change on forests. Changing climatic conditions affect forest productivity and alter the risk profile of forests and forest enterprises. Intensifying drought stress is seen as one major risk factor threatening forest management in the north German lowlands. Drought stress reduces tree growth and vitality and might even trigger mortality. But so far, it is not possible to quantify effects of a persistent dryer climate on forest productivity at a level suitable for forest management.\r\nMethods\r\n\r\nWe apply a well-established single-tree forest growth simulator to quantify the effect of persistent dryer climates on future forest productivity. We analyse the growth of Scots pine (Pinus sylvestris L.), European beech (Fagus sylvatica L.) and oak (Quercus robur L. and Quercus petraea (Matt.) Liebl.) in two forest regions in the north German lowlands for a time interval of 60 years until 2070. The growth response under three different climate projections is compared to a baseline scenario.\r\nResults\r\n\r\nThe results show clear differences in volume increment to persistent dryer climates between tree species. The findings exhibit regional differences and temporal trends. While mean annual increment at biological rotation age of Scots pine and oak predominantly benefits from the projected climate conditions until 2070, beech might suffer losses of up to 3 m3·ha–1·yr–1 depending on climate scenario and region. However, in the projection period 2051 to 2070 the uncertainty ranges comprise positive as well as negative climatic effects for all species.\r\nConclusions\r\n\r\nThe projected changes in forest growth serve as quantitative contributions to provide decision support in the evaluation of, for example, species future site suitability and timber supply assessments. The analysis of productivity changes under persistent dryer climate complements the drought vulnerability assessment which is applied in practical forestry in northwestern Germany today. The projected species’ productivity has strong implications for forest management and the inherent uncertainty needs to be accounted for."],["dc.identifier.doi","10.1186/s40663-018-0152-0"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116494"],["dc.identifier.url","http://dx.doi.org/10.1186/s40663-018-0152-0"],["dc.language.iso","en"],["dc.relation.issn","2197-5620"],["dc.relation.orgunit","Nordwestdeutsche Forstliche Versuchsanstalt"],["dc.rights","CC BY 4.0"],["dc.title","Quantifying the effect of persistent dryer climates on forest productivity and implications for forest planning: a case study in northern Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5105"],["dc.bibliographiccitation.issue","19"],["dc.bibliographiccitation.journal","The EMBO Journal"],["dc.bibliographiccitation.lastpage","5113"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Rak, A."],["dc.contributor.author","Fedorov, R."],["dc.contributor.author","Alexandrov, K."],["dc.contributor.author","Albert, S."],["dc.contributor.author","Goody, R.S."],["dc.contributor.author","Gallwitz, D."],["dc.contributor.author","Scheidig, A.J."],["dc.date.accessioned","2021-12-08T12:27:38Z"],["dc.date.available","2021-12-08T12:27:38Z"],["dc.date.issued","2000"],["dc.identifier.doi","10.1093/emboj/19.19.5105"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/95407"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.eissn","1460-2075"],["dc.relation.issn","0261-4189"],["dc.rights.uri","http://doi.wiley.com/10.1002/tdm_license_1.1"],["dc.title","Crystal structure of the GAP domain of Gyp1p: first insights into interaction with Ypt/Rab proteins"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","219"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","Fleck, Stefan"],["dc.contributor.author","Ahrends, Bernd"],["dc.contributor.author","Sutmöller, Johannes"],["dc.contributor.author","Evers, Jan"],["dc.contributor.author","Meesenburg, Henning"],["dc.date.accessioned","2022-11-04T11:01:50Z"],["dc.date.available","2022-11-04T11:01:50Z"],["dc.date.issued","2017"],["dc.description.abstract","The North German Lowland is a region with locally high nitrate (NO3−) concentrations in seepage water, inducing an increased susceptibility to the effects of climate change. The future risk of rising NO3− concentrations in seepage water from forests was quantified for four regions in the North German Lowland using climate projections and a modelling system comprising submodels for forest stand development (WaldPlaner), water budgets (WaSiM-ETH), and biogeochemical element cycles (VSD+). The simulations for the period from 1990 to 2070 included three different forest management scenarios (reference, biodiversity, and climate protection) and showed a general decrease in groundwater recharge which could hardly be influenced by any of the management options. The simulated soil organic matter stocks adequately represented their past increase as expected from the National Forest Soil Inventory (NFSI), but also showed a future decline under climate change conditions which leads to higher organic matter decomposition and a long-lasting increase of NO3− leaching from forest soils. While the climate protection oriented scenario shows the highest increase in NO3− concentrations during the projection period until 2070, the biodiversity scenario kept NO3− concentrations in seepage water below the legal thresholds in three of four selected model regions."],["dc.identifier.doi","10.3390/f8060219"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116947"],["dc.identifier.url","http://dx.doi.org/10.3390/f8060219"],["dc.language.iso","en"],["dc.relation.issn","1999-4907"],["dc.relation.orgunit","Nordwestdeutsche Forstliche Versuchsanstalt"],["dc.rights","CC BY 4.0"],["dc.title","Is Biomass Accumulation in Forests an Option to Prevent Climate Change Induced Increases in Nitrate Concentrations in the North German Lowland?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]