@article{BoseScherrerCamareroetal.2021, author = {Bose, Arun K. and Scherrer, Daniel and Camarero, j. Julio and Ziche, Daniel and Babst, Flurin and Bigler, Christof and Bolte, Andreas and Dorado-Li{\~n}{\´a}n, Isabel and Etzold, Sophia and Fonti, Patrick and Forrester, David I. and Gavinet, Jordane and Gazol, Antonio and Gonz{\´a}lez de Andr{\´e}s, Ester and Karger, Dirk Nikolaus and Lebourgeois, Francois and L{\´e}vesque, Mathieu and Mart{\´i}nez-Sancho, Elisabet and Menzel, Annette and Neuwirth, Burkhard and Nicolas, Manuel and Sanders, Tanja G. M. and Scharnweber, Tobias and Schr{\"o}der, Jens and Zweifel, Roman and Gessler, Arthur and Rigling, Andreas}, title = {Climate sensitivity and drought seasonality determine post-drought growth recovery of Quercus petraea and Quercus robur in Europe}, series = {Science of The Total Environment}, volume = {784}, journal = {Science of The Total Environment}, publisher = {Elsevier}, issn = {1879-1026}, doi = {10.1016/j.scitotenv.2021.147222}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-2609}, pages = {13}, year = {2021}, abstract = {Recent studies have identified strong relationships between delayed recovery of tree growth after drought and tree mortality caused by subsequent droughts. These observations raise concerns about forest ecosystem services and post-drought growth recovery given the projected increase in drought frequency and extremes. For quantifying the impact of extreme droughts on tree radial growth, we used a network of tree-ring width data of 1689 trees from 100 sites representing most of the distribution of two drought tolerant, deciduous oak species (Quercus petraea and Quercus robur). We first examined which climatic factors and seasons control growth of the two species and if there is any latitudinal, longitudinal or elevational trend. We then quantified the relative departure from pre-drought growth during droughts, and how fast trees were able to recover the pre-drought growth level. Our results showed that growth was more related to precipitation and climatic water balance (precipitation minus potential evapotranspiration) than to temperature. However, we did not detect any clear latitudinal, longitudinal or elevational trends except a decreasing influence of summer water balance on growth of Q. petraea with latitude. Neither species was able to maintain the pre-drought growth level during droughts. However, both species showed rapid recovery or even growth compensation after summer droughts but displayed slow recovery in response to spring droughts where none of the two species was able to fully recover the pre-drought growth-level over the three post-drought years. Collectively, our results indicate that oaks which are considered resilient to extreme droughts have also shown vulnerability when droughts occurred in spring especially at sites where long-term growth is not significantly correlated with climatic factors. This improved understanding of the role of drought seasonality and climate sensitivity of sites is key to better predict trajectories of post-drought growth recovery in response to the drier climate projected for Europe.}, language = {en} } @article{HentschelMoellerWenningetal.2018, author = {Hentschel, Rainer and M{\"o}ller, Katrin and Wenning, Aline and Degenhardt, Annett and Schr{\"o}der, Jens}, title = {Importance of Ecological Variables in Explaining Population Dynamics of Three Important Pine Pest Insects}, series = {Frontiers in Plant Science}, journal = {Frontiers in Plant Science}, number = {9}, publisher = {Frontiers Media S.A.}, issn = {1664-462X}, doi = {10.3389/fpls.2018.01667}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-3285}, pages = {17}, year = {2018}, abstract = {Climate change challenges forest vitality both directly by increasing drought and heat periods and indirectly, e.g., by creating favorable conditions for mass outbreaks of phyllophagous insects. The large forests dominated by Scots pine (Pinus sylvestris L.) that cover the lowland regions in northeast Germany have already been affected regularly by cyclic mass propagations of defoliating insect species in the past with climate projections implying an even more advantageous environment for devastating outbreaks in the future. To improve predictive and responsive capacities we have investigated a wide range of ecological parameters to identify those most strongly related to past outbreak waves of three central species. In total, we analyzed 3,748 variables covering stand and neighborhood properties, site quality, and climatic conditions for an area of roughly 750,000 ha of pine forests in the period 2002-2016. To reflect sensitivity against varying climate, we computed "floating windows" in relation to critical phenological phases of the respective insects. The parameters with the highest explanatory power resulted from the variable importance measures of the Random Forest (RF) methodology and have been evaluated by a 10-fold cross-validation process. Our findings closely reflect the known specific gradation patterns and show that relative variable importance varies with species. While Lymantria monacha L. feeding was mainly dependent on the surroundings of the respective stand, Diprion pini L. proved to be almost exclusively susceptible to climatic effects in its population dynamics. Dendrolimus pini L. exhibited a mixed pattern of variable importance involving both climatic and forest structure parameters. In many cases the obtained statistical results support well-known ecological cause-effect relations and long-term population change dynamics. The RF delivered very high levels of sensitivity and specificity in the developed classifications and proved to be an excellent tool to handle the large amounts of data utilized for this study. While the presented classification approach may already support a better prognosis of the amplitude during the outbreak culmination, the obtained (most important) variables are proposed as preferable covariates for modeling population dynamics of the investigated insect species.}, language = {en} } @inproceedings{SchroederGuerickeKoerner2021, author = {Schr{\"o}der, Jens and Guericke, Martin and K{\"o}rner, Michael}, title = {Fingerprints of biotic agents in tree-ring and NDVI time series of forest stands}, series = {TRACE - Tree Rings in Archeology, Climatology and Ecology - Virtual Conference 2021}, booktitle = {TRACE - Tree Rings in Archeology, Climatology and Ecology - Virtual Conference 2021}, doi = {10.13140/RG.2.2.17808.33286}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-5559}, pages = {1}, year = {2021}, language = {en} } @article{LinkevičiusSchroeder, author = {Linkevičius, Edgaras and Schr{\"o}der, Jens}, title = {Climatic Effects on the Growth of Fagus sylvatica L. in Mixed Stands with Pinus sylvestris L. in Lithuania}, series = {Sustainability}, volume = {16}, journal = {Sustainability}, number = {20}, editor = {Perazzo, Alejandro Javier Rescia}, publisher = {MDPI}, issn = {2071-1050}, doi = {10.3390/su16208847}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-9136}, abstract = {Climate change and warming will potentially profoundly affect forest growth and yield. However, climate change is not only a threat but also an opportunity for tree species to be more productive or colonize new territories where previously they were fragmented or absent. European beech ( Fagus sylvatica L.) is a dominant and significant tree species in European forests with a pronounced ability to grow on a great variety of sites and to form mixtures with other tree species due to its shade tolerance. So far, only a few studies have analysed its growth and reaction to changing climatic conditions outside its natural gradient in the north. The aim of this study was therefore to clarify the main growth patterns and tree ring formation characteristics of beech (outside their natural distribution) in mixed stands with Scots pine ( Pinus sylvestris L.) The analyses were carried out in two-layered stands in the western part of Lithuania with tree-ring data measured on stem disks collected at 1 m height that were available from shelter-cut thinning activities in a number of forest stands in the region. Our results show that higher temperatures during the summer months of July and August generally inhibited the radial growth of beech under given site conditions. In contrast, warmer late-autumn and cooler early-winter periods together with warmer springs positively affected the radial increments. Above-average precipitation during the vegetation period contributed to the beech producing additional amounts of radial increments. The increasing temperature trends of the summer months and decreasing monthly amounts of precipitation during the vegetation period in recent decades tend to have adverse effects on the ecological conditions for beech growth and vitality in Lithuania. Despite these results, the European beech successfully grows in the sample region and has produced 200 m 3 ha -1 in the analysed stands.}, subject = {-}, language = {en} } @article{EngelHagemannSchroeder, author = {Engel, Markus and Hagemann, Ulrike and Schr{\"o}der, Jens}, title = {Long-Term Growth Trends of 18 Native and Non-Native Tree Species Based on Data from Experimental Plots Since 1878 in Brandenburg, Germany}, series = {Forests}, volume = {16}, journal = {Forests}, number = {2}, editor = {Diaci, Jurij}, publisher = {MDPI}, issn = {1999-4907}, doi = {10.3390/f16020225}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-9644}, abstract = {The rapid environmental changes associated with climate change increase the need for adaptation strategies in forest management based on profound knowledge about tree species, particularly in the context of assisted migration. For research purposes, selected native and non-native tree species were planted in Brandenburg, Germany more than 120 years ago. Today, these sites provide an opportunity to gather insights about their performance and growth-response throughout the past century. We analyzed the height growth increment of 18 tree species on 1765 long-term experimental plots, the earliest of which have been monitored since 1878. We additionally investigated the stand-level volume increments on 60 unmanaged plots for two of these species. Our results show increasing trends in forest stand growth for Scots pine ( Pinus sylvestris L.) and Sessile oak ( Quercus petraea (Matt.) Liebl.). However, long-term height increment showed positive, negative, and indifferent growth trends in reaction to changing environmental conditions. Remarkably, 16 out of 18 species showed a growth decline between the years 2000 and 2020, likely attributable to increasing frequencies of single and consecutive drought events. We found non-native species to perform comparably to native tree species. Forest management should reconsider the role of native and non-native species in climate-adapted forests. We recommend focusing on provenance and local site adaptability in assisted migration efforts and argue that maintenance of long-term experiments can provide us with valuable insights on species performance in the near future.}, subject = {-}, language = {en} } @article{JouySchueleAdhikarietal., author = {Jouy, Florent and Sch{\"u}le, Maren and Adhikari, Yojana and Binder, Anja and Clerc, Danica and Gerwin, Werner and Heinken, Thilo and Raab, Thomas and Repmann, Frank and R{\"o}nnefarth, Susanne and Schirrmacher, Marina and Schmehl, Marie-Therese and Schr{\"o}der, Jens and Ibisch, Pierre L.}, title = {Factors impacting the variability of post-fire forest regeneration in central European pine plantations}, series = {Restoration Ecology}, volume = {33}, journal = {Restoration Ecology}, number = {4}, publisher = {Wiley Periodicals, Inc.}, address = {Malden, USA}, issn = {1061-2971}, doi = {10.1111/rec.70017}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-10108}, pages = {15}, abstract = {Fire is increasingly posing a risk to forests and plantations, even in the temperate latitudes of central Europe. Little is known about fire ecology in this region, and therefore, appropriate approaches for the management and reforestation of burned sites are mostly lacking. In a Scots pine plantation region in Brandenburg (northeast Germany), the early tree regeneration of two nearby areas that burned 1 year apart was investigated. We observed that 3 years after the fire events, the forest in one study area showed a relatively high regeneration with a mean density of 7765 saplings/ha, clearly dominated by European aspen (93\%); whereas the other study area showed a lower mean density of 5061 saplings/ha, dominated by Scots pine (71\%) and aspen (15\%). Three years after the fires, the difference in aspen density was 11-fold between the two areas. We studied the effects of several variables about soil and environmental properties on the aspen establishment in these two study areas in the second and third years after the fire events. We found that the post-fire aspen regeneration was influenced by several factors, including soil texture, soil disturbance from forest management, volume of deadwood, and browsing. We also discussed that weather conditions during seed production and germination might have played a role in the difference in aspen establishment between the two study areas. We concluded that the post-fire forest regeneration potential in the study region is highly variable and could come under critical pressure as climate change progresses.}, subject = {-}, language = {en} } @article{SchmehlAdhikariBalthasaretal., author = {Schmehl, Marie-Therese and Adhikari, Yojana and Balthasar, Cathrina and Binder, Anja and Clerc, Danica and Dobkowitz, Sophia and Gerwin, Werner and G{\"u}nther, Kristin and Hartong, Heinrich and Heinken, Thilo and Hess, Carsten and Ibisch, Pierre L. and Jouy, Florent and Leinen, Loretta and Raab, Thomas and Repmann, Frank and R{\"o}nnefarth, Susanne and Rohlfs, Lilly and Schirrmacher, Marina and Schr{\"o}der, Jens and Sch{\"u}le, Maren and Vieth-Hillebrand, Andrea and Francke, Till}, title = {Monitoring abiotic and biotic parameters of forest regrowth under different management regimes on former wildfire sites in northeastern Germany - data from the PYROPHOB project}, series = {Earth System Science Data}, volume = {17}, journal = {Earth System Science Data}, number = {11}, publisher = {Copernicus Publications}, address = {G{\"o}ttingen, Germany}, issn = {1866-3516}, doi = {10.5194/essd-17-6295-2025}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-10302}, pages = {6295 -- 6313}, abstract = {Abstract We present the data recorded by eight institutions within the PYROPHOB project, running from 2020 to 2024 at two forest research sites in the south-west of Brandenburg, Germany. The aim of the project was to monitor abiotic and biotic parameters of forest regrowth under different management regimes on former wildfire sites in northeastern Germany. The observations comprised intermittent and continuous measurements or surveys on meteorological parameters (rainfall, temperature, vapour pressure deficit), soil (soil type and texture, soil chemistry and leaching, water content, soil temperature), deadwood, stand structure, vegetation regrowth, abundance of selected fauna (moths, beetles, mammals), UAV-based remote sensing (stand structure, spatial overview), and photo monitoring (succession). Thus, the multitude of collected data allows not only for detailed analyses of these observables separately, but also considering their interaction for a more multidisciplinary view on forest recovery after a wildfire. The data are available under the following DOIs: 10.23728/b2share.08a6a8b56f774a08a984871e7ef1b5a8 (Part 1, ), under embargo until 31 March 2026 (Part 2, ), 10.23728/b2share.de1661761da5481f938caf460e4f0ca9 (Part 3.1, ), and 10.23728/b2share.51bdf4b6dc854873b6ff44fdddbf4c3b (Part 3.2, ).}, subject = {-}, language = {en} } @article{SchmehlAdhikariBalthasaretal., author = {Schmehl, Marie-Therese and Adhikari, Yojana and Balthasar, Cathrina and Binder, Anja and Clerc, Danica and Dobkowitz, Sophia and Gerwin, Werner and G{\"u}nther, Kristin and Hartong, Heinrich and Heinken, Thilo and Hess, Carsten and Ibisch, Pierre L. and Jouy, Florent and Leinen, Loretta and Raab, Thomas and Repmann, Frank and R{\"o}nnefarth, Susanne and Rohlfs, Lilly and Schirrmacher, Marina and Schr{\"o}der, Jens and Sch{\"u}le, Maren and Vieth-Hillebrand, Andrea and Francke, Till}, title = {Monitoring abiotic and biotic parameters of forest regrowth under different management regimes on former wildfire sites in northeastern Germany - data from the PYROPHOB project}, series = {Earth System Science Data}, volume = {17}, journal = {Earth System Science Data}, number = {11}, publisher = {Copernicus Publications}, address = {G{\"o}ttingen, Germany}, issn = {1866-3516}, doi = {10.5194/essd-17-6295-2025}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-10293}, pages = {6295 -- 6313}, abstract = {Abstract We present the data recorded by eight institutions within the PYROPHOB project, running from 2020 to 2024 at two forest research sites in the south-west of Brandenburg, Germany. The aim of the project was to monitor abiotic and biotic parameters of forest regrowth under different management regimes on former wildfire sites in northeastern Germany. The observations comprised intermittent and continuous measurements or surveys on meteorological parameters (rainfall, temperature, vapour pressure deficit), soil (soil type and texture, soil chemistry and leaching, water content, soil temperature), deadwood, stand structure, vegetation regrowth, abundance of selected fauna (moths, beetles, mammals), UAV-based remote sensing (stand structure, spatial overview), and photo monitoring (succession). Thus, the multitude of collected data allows not only for detailed analyses of these observables separately, but also considering their interaction for a more multidisciplinary view on forest recovery after a wildfire. The data are available under the following DOIs: 10.23728/b2share.08a6a8b56f774a08a984871e7ef1b5a8 (Part 1, ), under embargo until 31 March 2026 (Part 2, ), 10.23728/b2share.de1661761da5481f938caf460e4f0ca9 (Part 3.1, ), and 10.23728/b2share.51bdf4b6dc854873b6ff44fdddbf4c3b (Part 3.2, ).}, subject = {-}, language = {en} }