@article{Adams2016, author = {Adams, Marc-Oliver and Seifert, Carlo Lutz and Lehner, Lisamarie and Truxa, Christine and Wanek, Wolfgang and Fiedler, Konrad}, doi = {10.1186/s12983-016-0170-0}, journal = {Frontiers in Zoology}, month = {aug}, title = {Stable isotope signatures reflect dietary diversity in European forest moths}, url = {https://doi.org/10.1186/s12983-016-0170-0}, volume = {13}, year = {2016} } @article{Biasi2022, abstract = {RationaleStable isotope approaches are increasingly applied to better understand the cycling of inorganic nitrogen (Ni) forms, key limiting nutrients in terrestrial and aquatic ecosystems. A systematic comparison of the accuracy and precision of the most commonly used methods to analyze δ15N in NO3 and NH4+ and interlaboratory comparison tests to evaluate the comparability of isotope results between laboratories are, however, still lacking.MethodsHere, we conducted an interlaboratory comparison involving 10 European laboratories to compare different methods and laboratory performance to measure δ15N in NO3 and NH4+. The approaches tested were (a) microdiffusion (MD), (b) chemical conversion (CM), which transforms Ni to either N2O (CM‐N2O) or N2 (CM‐N2), and (c) the denitrifier (DN) methods.ResultsThe study showed that standards in their single forms were reasonably replicated by the different methods and laboratories, with laboratories applying CM‐N2O performing superior for both NO3 and NH4+, followed by DN. Laboratories using MD significantly underestimated the “true” values due to incomplete recovery and also those using CM‐N2 showed issues with isotope fractionation. Most methods and laboratories underestimated the at%15N of Ni of labeled standards in their single forms, but relative errors were within maximal 6% deviation from the real value and therefore acceptable. The results showed further that MD is strongly biased by nonspecificity. The results of the environmental samples were generally highly variable, with standard deviations (SD) of up to ± 8.4‰ for NO3 and ± 32.9‰ for NH4+; SDs within laboratories were found to be considerably lower (on average 3.1‰). The variability could not be connected to any single factor but next to errors due to blank contamination, isotope normalization, and fractionation, and also matrix effects and analytical errors have to be considered.ConclusionsThe inconsistency among all methods and laboratories raises concern about reported δ15N values particularly from environmental samples.}, author = {Biasi, Christina and Jokinen, Simo and Prommer, Judith and Ambus, Per and Dörsch, Peter and Yu, Longfei and Granger, Steve and Boeckx, Pascal and Van Nieuland, Katja and Brüggemann, Nicolas and Wissel, Holger and Voropaev, Andrey and Zilberman, Tami and Jäntti, Helena and Trubnikova, Tatiana and Welti, Nina and Voigt, Carolina and Gebus‐Czupyt, Beata and Czupyt, Zbigniew and Wanek, Wolfgang}, doi = {10.1002/rcm.9370}, journal = {Rapid Communications in Mass Spectrometry}, month = {sep}, title = {Challenges in measuring nitrogen isotope signatures in inorganic nitrogen forms: An interlaboratory comparison of three common measurement approaches}, url = {https://oadoi.org/10.1002/rcm.9370}, volume = {36}, year = {2022} } @article{Bramley-Alves2015, abstract = {Increased aridity is of global concern. Polar regions provide an opportunity to monitor changes in bio-available water free of local anthropogenic influences. However, sophisticated proxy measures are needed. We explored the possibility of using stable carbon isotopes in segments of moss as a fine-scale proxy for past bio-available water. Variation in δ13C with water availability was measured in three species across three peninsulas in the Windmill Islands, East Antarctica and verified using controlled chamber experiments. The δ13C from Antarctic mosses accurately recorded long-term variations in water availability in the field, regardless of location, but significant disparities in δ13C between species indicated some make more sensitive proxies. δ13CSUGAR derived from living tissues can change significantly within the span of an Antarctic season (5 weeks) in chambers, but under field conditions, slow growth means that this technique likely represents multiple seasons. δ13CCELLULOSE provides a precise and direct proxy for bio-available water, allowing reconstructions for coastal Antarctica and potentially other cold regions over past centuries.This article is protected by copyright. All rights reserved.}, author = {Bramley-Alves, Jessica and Wanek, Wolfgang and French, Kristine and Robinson, Sharon A.}, doi = {10.1111/gcb.12848}, journal = {Global Change Biology}, month = {feb}, pages = {2454-2464}, title = {Mossδ13C: an accurate proxy for past water environments in polar regions}, url = {https://www.researchgate.net/profile/Jessica_Bramley-Alves/publication/270164091_Moss_d13C_An_accurate_proxy_for_past_water_environments_in_polar_regions/links/54ea77150cf27a6de1146b82.pdf}, volume = {21}, year = {2015} } @article{Bramley-Alves2016, author = {Bramley-Alves, Jessica and Wanek, Wolfgang and Robinson, Sharon A.}, doi = {10.1016/j.palaeo.2016.03.028}, journal = {Palaeogeography, Palaeoclimatology, Palaeoecology}, month = {jul}, pages = {20-29}, title = {Moss δ 13 C: Implications for subantarctic palaeohydrological reconstructions}, url = {http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4768&context=smhpapers}, volume = {453}, year = {2016} } @article{Canarini2020, author = {Canarini, Alberto and Wanek, Wolfgang and Watzka, Margarete and Sandén, Taru and Spiegel, Heide and Šantrůček, Jiří and Schnecker, Jörg}, doi = {10.1111/gcb.15168}, journal = {Global Change Biology}, month = {jun}, pages = {5333-5341}, title = {Quantifying microbial growth and carbon use efficiency in dry soil environments via 18 O water vapor equilibration}, url = {https://oadoi.org/10.1111/gcb.15168}, volume = {26}, year = {2020} } @article{Craine2015, abstract = {Citation: Craine, J. M., Elmore, A. J., Wang, L. X., Augusto, L., Baisden, W. T., Brookshire, E. N. J., . . . Zeller, B. (2015). Convergence of soil nitrogen isotopes across global climate gradients. Scientific Reports, 5, 8. doi:10.1038/srep08280 ; Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems, and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the N-15 : N-14 ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of N cycling. In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual temperature (MAT), mean annual precipitation (MAP), and the concentrations of organic carbon and clay in soil. In both hot ecosystems and dry ecosystems, soil organic matter was more enriched in N-15 than in corresponding cold ecosystems or wet ecosystems. Below a MAT of 9.8 degrees C, soil delta N-15 was invariant with MAT. At the global scale, soil organic C concentrations also declined with increasing MAT and decreasing MAP. After standardizing for variation among mineral soils in soil C and clay concentrations, soil delta N-15 showed no consistent trends across global climate and latitudinal gradients. Our analyses could place new constraints on interpretations of patterns of ecosystem N cycling and global budgets of gaseous N loss. ; Additional Authors: Michelsen, A.;Nardoto, G. B.;Oliveira, R. S.;Perakis, S. S.;Peri, P. L.;Quesada, C. A.;Richter, A.;Schipper, L. A.;Stevenson, B. A.;Tumer, B. L.;Viani, R. A. G.;Wanek, W.;Zeller, B.}, author = {Craine, Joseph M. and Elmore, Andrew J. and Wang, Lixin X. and Augusto, Laurent and Troy Baisden, W. and Baisden, W. Troy and Brookshire, E. N. J. and Cramer, Michael D. and Hasselquist, Niles J. and Hobbie, Erik A. and Marty Kranabetter, J. and Kahmen, Ansgar and Koba, Keisuke and Kranabetter, J. Marty and Mack, Michelle C. and Marin-Spiotta, Erika and Mayor, Jordan R. and McLauchlan, Kendra K. and Michelsen, Anders and Nardoto, Gabriela B. and Oliveira, Rafael S. and Perakis, Steven S. and Peri, Pablo L. and R., Jordan and Quesada, Carlos A. and Richter, Andreas and Schipper, Louis A. and Stevenson, Bryan A. and Turner, Benjamin L. and Viani, Ricardo A. G. and Wanek, Wolfgang and Zeller, Bernd}, doi = {10.1038/srep08280}, journal = {Scientific Reports}, month = {feb}, title = {Convergence of soil nitrogen isotopes across global climate gradients}, url = {https://www.nature.com/articles/srep08280.pdf}, volume = {5}, year = {2015} } @article{Enge2016, abstract = {Acknowledgments We are very grateful to Hiroshi Kitazato for the possibility to participate in the research cruise “YK08-11.” We thank the captain and crew of the R/V Yokohama and the pilots of the submersible Shinkai 6500 for the skillful performed dives. We are also very thankful to Markus Moeseneder for his help in the sampling phase during the cruise. We would also like to thank the two reviewers for their comments and suggestions. This article was supported by the Open Access Publishing Fund of the University of Vienna. ; Peer reviewed ; Publisher PDF}, author = {Enge, Annekatrin J. and Institut fur Palaontologie, Fakultat fur Geowissenschaften Geographie und Astronomie University of Vienna and Wukovits, Julia and Wanek, Wolfgang and Department fur Mikrobiologie und Okosystemforschung, Fakultat fur Lebenswissenschaften University of Vienna and Watzka, Margarete and Witte, Ursula F. M. and Oceanlab, University of Aberdeen and Hunter, William R. and School of Biological Sciences, Queen's University Belfast and Heinz, Petra}, doi = {10.3389/fmicb.2016.00071}, journal = {Frontiers in Microbiology}, month = {feb}, title = {Carbon and Nitrogen Uptake of Calcareous Benthic Foraminifera along a Depth-Related Oxygen Gradient in the OMZ of the Arabian Sea}, url = {http://dx.doi.org/10.3389/fmicb.2016.00071}, volume = {7}, year = {2016} } @article{Hanak2015, author = {Hanak, A. M. and Fragner, L. and Kopp, B. and Wawrosch, C. and Goessnitzer, F. and Gössnitzer, F. and Wanek, W. and Ewald, D. and Ulrich, K. and Mauget, Jc and Weckwerth, W. and Godet, S.}, doi = {10.17660/actahortic.2015.1099.52}, journal = {Acta Horticulturae}, month = {sep}, pages = {439-442}, title = {Investigation of the Interaction of Endophytes and Poplar Plants in in Vitro Culture and Field Trials}, url = {https://oadoi.org/10.17660/actahortic.2015.1099.52}, year = {2015} } @article{Hietz2021, author = {Hietz, Peter and de Paula Oliveira, Rodolfo and de Paiva Farias, Rafael and Wagner, Katrin and Nunes Ramos, Flavio and Cabral, Juliano Sarmento and Agudelo, Claudia and Benavides, Ana María and Cach‐Pérez, Manuel Jesús and Cardelús, Catherine L. and Chilpa Galván, Nahlleli and Erickson Nascimento da Costa, Lucas and Paula Oliveira, Rodolfo and Einzmann, Helena J. R. and Paiva Farias, Rafael and Guzmán Jacob, Valeria and Kattge, Jens and Kessler, Michael and Kirby, Catherine and Kreft, Holger and Krömer, Thorsten and Males, Jamie and Monsalve Correa, Samuel and Moreno‐Chacón, Maria and Petter, Gunnar and Reyes‐García, Casandra and Saldaña, Alfredo and Schellenberger Costa, David and Taylor, Amanda and Velázquez Rosas, Noé and Wanek, Wolfgang and Woods, Carrie L. and Zotz, Gerhard}, doi = {10.1111/1365-2745.13802}, journal = {Journal of Ecology}, month = {nov}, pages = {340-358}, title = {Putting vascular epiphytes on the traits map}, url = {https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13802}, volume = {110}, year = {2021} } @article{Moghaddam2015, author = {Moghaddam, Ali and Raza, Amir and Vollmann, Johann and Ardakani, M. Reza and Wanek, Wolfgang and Gollner, Gabrielle and Friedel, Juergen K.}, doi = {10.1080/01448765.2014.1001437}, journal = {Biological Agriculture and Horticulture}, month = {jan}, pages = {177-192}, title = {Biological nitrogen fixation and biomass production stability in alfalfa (Medicago sativaL.) genotypes under organic management conditions}, url = {https://www.researchgate.net/profile/Wolfgang_Wanek/publication/273293607_Biological_nitrogen_fixation_and_biomass_production_stability_in_alfalfa_Medicago_sativa_L_genotypes_under_organic_management_conditions/links/56f98bca08ae7c1fda31197f.pdf}, volume = {31}, year = {2015} } @article{Petter2015, abstract = {Analysing functional traits along environmental gradients can improve our understanding of the mechanisms structuring plant communities. Within forests, vertical gradients in light intensity, temperature and humidity are often pronounced. Vascular epiphytes are particularly suitable for studying the influence of these vertical gradients on functional traits because they lack contact with the soil and thus individual plants are entirely exposed to different environmental conditions, from the dark and humid understory to the sunny and dry outer canopy.In this study, we analysed multiple aspects of the trait-based ecology of vascular epiphytes: shifts in trait values with height above ground (as a proxy for vertical environmental gradients) at community and species level, the importance of intra- vs. interspecific trait variability, and trait differences among taxonomic groups. We assessed ten leaf traits for 1,151 individuals belonging to 83 epiphyte species of all major taxonomic groups co-occurring in a Panamanian lowland forest.Community mean trait values of many leaf traits were strongly correlated with height and particularly specific leaf area and chlorophyll concentration showed non-linear, negative trends.Intraspecific trait variability was pronounced and accounted for one third of total observed trait variance. Intraspecific trait adjustments along the vertical gradient were common and seventy percent of all species showed significant trait-height relationships. In addition, intraspecific trait variability was positively correlated with the vertical range occupied by species.We observed significant trait differences between major taxonomic groups (orchids, ferns, aroids, bromeliads). In ferns, for instance, leaf dry matter content was almost twofold higher than in the other taxonomic groups. This indicates that some leaf traits are taxonomically conserved.Our study demonstrates that vertical environmental gradients strongly influence functional traits of vascular epiphytes. In order to understand community composition along such gradients, it is central to study several aspects of trait-based ecology, including both community and intraspecific trends of multiple traits.This article is protected by copyright. All rights reserved.}, author = {Petter, Gunnar and Wagner, Katrin and Wanek, Wolfgang and Delgado, Eduardo Javier Sánchez and Sánchez Delgado, Eduardo Javier and Zotz, Gerhard and Cabral, Juliano Sarmento and Kreft, Holger}, doi = {10.1111/1365-2435.12490}, journal = {Functional Ecology}, month = {jun}, pages = {188-198}, title = {Functional leaf traits of vascular epiphytes: Vertical trends within the forest, intra- and interspecific trait variability, and taxonomic signals}, url = {https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.12490}, volume = {30}, year = {2015} } @article{Reyes-García2022, abstract = {The Bromeliaceae family has been used as a model to study adaptive radiation due to its terrestrial, epilithic, and epiphytic habits with wide morpho-physiological variation. Functional groups described by Pittendrigh in 1948 have been an integral part of ecophysiological studies. In the current study, we revisited the functional groups of epiphytic bromeliads using a 204 species trait database sampled throughout the Americas. Our objective was to define epiphytic functional groups within bromeliads based on unsupervised classification, including species from the dry to the wet end of the Neotropics. We performed a hierarchical cluster analysis with 16 functional traits and a discriminant analysis, to test for the separation between these groups. Herbarium records were used to map species distributions and to analyze the climate and ecosystems inhabited. The clustering supported five groups, C3 tank and CAM tank bromeliads with deep tanks, while the atmospheric group (according to Pittendrigh) was divided into nebulophytes, bromeliads with shallow tanks, and bromeliads with pseudobulbs. The two former groups showed distinct traits related to resource (water) acquisition, such as fog (nebulophytes) and dew (shallow tanks). We discuss how the functional traits relate to the ecosystems inhabited and the relevance of acknowledging the new functional groups.}, author = {Reyes-García, Casandra and Pereira-Zaldívar, Narcy Anai and Espadas-Manrique, Celene and Tamayo-Chim, Manuela and Chilpa-Galván, Nahlleli and Cach-Pérez, Manuel Jesús and Ramírez-Medina, Marypaz and Benavides, Ana Maria and Hietz, Peter and Zotz, Gerhard and Andrade, José Luis and Cardelús, Catherine and de Paula Oliveira, Rodolfo and Einzmann, Helena J. R. and Guzmán Jacob, Valeria and Krömer, Thorsten and Pinzón, Juan P. and Sarmento Cabral, Juliano and Wanek, Wolfgang and Woods, Carrie}, doi = {10.3390/plants11223151}, journal = {Plants}, month = {nov}, pages = {3151}, title = {New Proposal of Epiphytic Bromeliaceae Functional Groups to Include Nebulophytes and Shallow Tanks}, url = {https://doi.org/10.3390/plants11223151}, volume = {11}, year = {2022} } @article{Schepaschenko2019, abstract = {AbstractForest biomass is an essential indicator for monitoring the Earth’s ecosystems and climate. It is a critical input to greenhouse gas accounting, estimation of carbon losses and forest degradation, assessment of renewable energy potential, and for developing climate change mitigation policies such as REDD+, among others. Wall-to-wall mapping of aboveground biomass (AGB) is now possible with satellite remote sensing (RS). However, RS methods require extant, up-to-date, reliable, representative and comparable in situ data for calibration and validation. Here, we present the Forest Observation System (FOS) initiative, an international cooperation to establish and maintain a global in situ forest biomass database. AGB and canopy height estimates with their associated uncertainties are derived at a 0.25 ha scale from field measurements made in permanent research plots across the world’s forests. All plot estimates are geolocated and have a size that allows for direct comparison with many RS measurements. The FOS offers the potential to improve the accuracy of RS-based biomass products while developing new synergies between the RS and ground-based ecosystem research communities.}, author = {Schepaschenko, Dmitry and Chave, Jérôme and Phillips, Oliver L. and Lewis, Simon L. and Davies, Stuart J. and Réjou-Méchain, Maxime and Sist, Plinio and Scipal, Klaus and Perger, Christoph and Herault, Bruno and Labrière, Nicolas and Hofhansl, Florian and Affum-Baffoe, Kofi and Aleinikov, Alexei and Alonso, Alfonso and Amani, Christian and Araujo-Murakami, Alejandro and Armston, John and Arroyo, Luzmila and Ascarrunz, Nataly and Azevedo, Celso and Baker, Timothy and Bałazy, Radomir and Bedeau, Caroline and Berry, Nicholas and Bilous, Andrii M. and Bilous, Svitlana Y.-U. and Bissiengou, Pulchérie and Blanc, Lilian and Bobkova, Kapitolina S. and Braslavskaya, Tatyana and Brienen, Roel and Burslem, David F. R. P. and Condit, Richard and Cuni-Sanchez, Aida and Danilina, Dilshad and del Castillo Torres, Dennis and Derroire, Géraldine and Descroix, Laurent and Sotta, Eleneide Doff and d’Oliveira, Marcus V. N. and Dresel, Christopher and Erwin, Terry and Evdokimenko, Mikhail D. and Falck, Jan and Feldpausch, Ted R. and Foli, Ernest G. and Foster, Robin and Fritz, Steffen and Garcia-Abril, Antonio Damian and Gornov, Aleksey and Gornova, Maria and Gothard-Bassébé, Ernest and Gourlet-Fleury, Sylvie and Guedes, Marcelino and Hamer, Keith C. and Susanty, Farida Herry and Higuchi, Niro and Coronado, Eurídice N. Honorio and Hubau, Wannes and Hubbell, Stephen and Ilstedt, Ulrik and Ivanov, Viktor V. and Kanashiro, Milton and Karlsson, Anders and Karminov, Viktor N. and Killeen, Timothy and Koffi, Jean-Claude Konan and Konovalova, Maria and Kraxner, Florian and Krejza, Jan and Krisnawati, Haruni and Krivobokov, Leonid V. and Kuznetsov, Mikhail A. and Lakyda, Ivan and Lakyda, Petro I. and Licona, Juan Carlos and Lucas, Richard M. and Lukina, Natalia and Lussetti, Daniel and Malhi, Yadvinder and Manzanera, José Antonio and Marimon, Beatriz and Junior, Ben Hur Marimon and Martinez, Rodolfo Vasquez and Martynenko, Olga V. and Matsala, Maksym and Matyashuk, Raisa K. and Mazzei, Lucas and Memiaghe, Hervé and Mendoza, Casimiro and Mendoza, Abel Monteagudo and Moroziuk, Olga V. and Mukhortova, Liudmila and Musa, Samsudin and Nazimova, Dina I. and Okuda, Toshinori and Oliveira, Luis Claudio and Ontikov, Petr V. and Osipov, Andrey F. and Pietsch, Stephan and Playfair, Maureen and Poulsen, John and Radchenko, Vladimir G. and Rodney, Kenneth and Rozak, Andes H. and Ruschel, Ademir and Rutishauser, Ervan and See, Linda and Shchepashchenko, Maria and Shevchenko, Nikolay and Shvidenko, Anatoly and Silveira, Marcos and Singh, James and Sonké, Bonaventure and Souza, Cintia and Stereńczak, Krzysztof and Stonozhenko, Leonid and Sullivan, Martin J. P. and Szatniewska, Justyna and Taedoumg, Hermann and ter Steege, Hans and Tikhonova, Elena and Toledo, Marisol and Trefilova, Olga V. and Valbuena, Ruben and Gamarra, Luis Valenzuela and Vasiliev, Sergey and Vedrova, Estella F. and Verhovets, Sergey V. and Vidal, Edson and Vladimirova, Nadezhda A. and Vleminckx, Jason and Vos, Vincent A. and Vozmitel, Foma K. and Wanek, Wolfgang and West, Thales A. P. and Woell, Hannsjorg and Woods, John T. and Wortel, Verginia and Yamada, Toshihiro and Nur Hajar, Zamah Shari and Zo-Bi, Irié Casimir}, doi = {10.1038/s41597-019-0196-1}, journal = {Scientific Data}, month = {oct}, title = {The Forest Observation System, building a global reference dataset for remote sensing of forest biomass}, url = {https://www.nature.com/articles/s41597-019-0196-1.pdf}, volume = {6}, year = {2019} } @article{Schindlbacher2015, abstract = {Temperate forests provide favorable conditions for carbonate bedrock weathering as the soil CO2 partial pressure is high and soil water is regularly available. As a result of weathering, abiotic CO2 can be released and contribute to the soil CO2 efflux. We used the distinct isotopic signature of the abiotic CO2 to estimate its contribution to the total soil CO2 efflux. Soil cores were sampled from forests on dolomite and limestone and were incubated under the exclusion of atmospheric CO2. Efflux and isotopic signatures of CO2 were repeatedly measured of cores containing the whole mineral soil and bedrock material (heterotrophic respiration + CO2 from weathering) and of cores containing only the mineral top-soil layer (A-horizon; heterotrophic respiration). An aliquot of the cores were let dry out during incubation to assess effects of soil moisture. Although the δ13C values of the CO2 efflux from the dolomite soil cores were within a narrow range (A-horizon −26.2 ± 0.1 ‰; whole soil profile wet −25.8 ± 0.1 ‰; whole soil profile dry −25.5 ± 0.1 ‰) the CO2 efflux from the separated A-horizons was significantly depleted in 13C when compared to the whole soil profiles (p = 0.015). The abiotic contribution to the total CO2 efflux from the dolomite soil cores was 2.0 ± 0.5 % under wet and 3.4 ± 0.5 % under dry conditions. No abiotic CO2 efflux was traceable from the limestone soil cores. An overall low contribution of CO2 from weathering was affirmed by the amount and 13C signature of the leached dissolved inorganic carbon (DIC) and the radiocarbon signature of the soil CO2 efflux in the field. Together, our data point towards no more than 1–2 % contribution of abiotic CO2 to the growing season soil CO2 efflux in the field.}, author = {Schindlbacher, Andreas and Borken, Werner and Brandstätter, Christian and Djukic, Ika and Spötl, Christoph and Wanek, Wolfgang}, doi = {10.1007/s10533-015-0097-0}, month = {apr}, title = {Contribution of carbonate weathering to the CO2 efflux from temperate forest soils}, url = {https://link.springer.com/content/pdf/10.1007%2Fs10533-015-0097-0.pdf}, year = {2015} } @article{Schindlbacher2015_2, author = {Schindlbacher, Andreas and Schnecker, Jörg and Takriti, Mounir and Borken, Werner and Wanek, Wolfgang}, doi = {10.1111/gcb.12996}, journal = {Global Change Biology}, month = {sep}, pages = {4265-4277}, title = { Microbial physiology and soil CO 2 efflux after 9 years of soil warming in a temperate forest - no indications for thermal adaptations }, url = {https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.12996}, volume = {21}, year = {2015} } @article{Spohn2016, author = {Spohn, Marie and Klaus, Karoline and Wanek, Wolfgang and Richter, Andreas}, doi = {10.1016/j.soilbio.2016.01.016}, journal = {Soil Biology and Biochemistry}, month = {feb}, pages = {74-81}, title = {Microbial carbon use efficiency and biomass turnover times depending on soil depth – Implications for carbon cycling}, url = {https://oadoi.org/10.1016/j.soilbio.2016.01.016}, volume = {96}, year = {2016} } @article{Spohn2016_2, author = {Spohn, Marie and Pötsch, Erich M. and Eichorst, Stephanie A. and Woebken, Dagmar and Wanek, Wolfgang and Richter, Andreas}, doi = {10.1016/j.soilbio.2016.03.008}, journal = {Soil Biology and Biochemistry}, month = {jun}, pages = {168-175}, title = {Soil microbial carbon use efficiency and biomass turnover in a long-term fertilization experiment in a temperate grassland}, url = {https://www.researchgate.net/profile/Wolfgang_Wanek/publication/299444244_Soil_microbial_carbon_use_efficiency_and_biomass_turnover_in_a_long-term_fertilization_experiment_in_a_temperate_grassland/links/56f98b0008ae7c1fda31196b.pdf}, volume = {97}, year = {2016} } @article{Taylor2015, abstract = {Tropical forests store large amounts of carbon in tree biomass, although the environmental controls on forest carbon stocks remain poorly resolved. Emerging airborne remote sensing techniques offer a powerful approach to understand how aboveground carbon density (ACD) varies across tropical landscapes. In this study, we evaluate the accuracy of the Carnegie Airborne Observatory (CAO) Light Detection and Ranging (LiDAR) system to detect top-of-canopy tree height (TCH) and ACD across the Osa Peninsula, Costa Rica. LiDAR and field-estimated TCH and ACD were highly correlated across a wide range of forest ages and types. Top-of-canopy height (TCH) reached 67 m, and ACD surpassed 225 Mg C ha-1, indicating both that airborne CAO LiDAR-based estimates of ACD are accurate in tall, high-biomass forests and that the Osa Peninsula harbors some of the most carbon-rich forests in the Neotropics. We also examined the relative influence of lithologic, topoedaphic and climatic factors on regional patterns in ACD, which are known to influence ACD by regulating forest productivity and turnover. Analyses revealed a spatially nested set of factors controlling ACD patterns, with geologic variation explaining up to 16% of the mapped ACD variation at the regional scale, while local variation in topographic slope explained an additional 18%. Lithologic and topoedaphic factors also explained more ACD variation at 30-m than at 100-m spatial resolution, suggesting that environmental filtering depends on the spatial scale of terrain variation. Our result indicate that patterns in ACD are partially controlled by spatial variation in geologic history and geomorphic processes underpinning topographic diversity across landscapes. ACD also exhibited spatial autocorrelation, which may reflect biological processes that influence ACD, such as the assembly of species or phenotypes across the landscape, but additional research is needed to resolve how abiotic and biotic factors contribute to ACD variation across high biomass, high diversity tropical landscapes.}, author = {Taylor, Philip and Asner, Gregory and Dahlin, Kyla and Anderson, Christopher and Knapp, David and Martin, Roberta and Mascaro, Joseph and Chazdon, Robin L. and Cole, Rebecca and Wanek, Wolfgang and Hofhansl, Florian and Malavassi, Edgar and V'ilchez-Alvarado, Braulio and Townsend, Alan}, doi = {10.1371/journal.pone.0126748}, journal = {PLoS ONE}, month = {jun}, pages = {e0126748}, title = {Landscape-Scale Controls on Aboveground Forest Carbon Stocks on the Osa Peninsula, Costa Rica}, url = {https://doi.org/10.1371/journal.pone.0126748}, volume = {10}, year = {2015} } @article{Wukovits2016, author = {Wukovits, Julia and Enge, Annekatrin J. and Wanek, Wolfgang and Watzka, Margarete and Heinz, Petra}, doi = {10.5194/bg-2016-509}, journal = {Biogeosciences Discussions}, month = {nov}, pages = {1-25}, title = {Effect of increased temperature on carbon and nitrogen uptake of two intertidal foraminifera (<i>Ammonia tepida</i> and <i>Haynesina germanica</i>)}, url = {https://doi.org/10.5194/bg-2016-509}, year = {2016} } @article{Zechmeister-Boltenstern2015, abstract = {Elemental stoichiometry constitutes an inherent link between biogeochemistry and the structure and processes within food webs, and thus is at the core of ecosystem functioning. Stoichiometry allows for spanning different levels of biological organization, from cellular metabolism to ecosystem structure and nutrient cycling, and is therefore particularly useful for establishing links between different ecosystem compartments. We review elemental carbon : nitrogen : phosphorus (C:N:P) ratios in terrestrial ecosystems (from vegetation, leaf litter, woody debris, and dead roots, to soil microbes and organic matter). While the stoichiometry of the plant, litter, and soil compartments of ecosystems is well understood, heterotrophic microbial communities, which dominate the soil food web and drive nutrient cycling, have received increasing interest in recent years. This review highlights the effects of resource stoichiometry on soil microorganisms and decomposition, specifically on the structure and function of heterotrophic microbial communities and suggests several general patterns. First, latitudinal gradients of soil and litter stoichiometry are reflected in microbial community structure and function. Second, resource stoichiometry may cause changes in microbial interactions and community dynamics that lead to feedbacks in nutrient availability. Third, global change alters the C:N, C:P, and N:P ratios of primary producers, with repercussions for microbial decomposer communities and critical ecosystem services such as soil fertility. We argue that ecological stoichiometry provides a framework to analyze and predict such global change effects at various scales.}, author = {Zechmeister-Boltenstern, Sophie and Mooshammer, Maria and Pe{\~n}uelas, J. and Keiblinger, Katharina Maria and Peñuelas, Josep and Richter, Andreas and Sardans, Jordi and Wanek, Wolfgang}, doi = {10.1890/14-0777.1}, journal = {Ecological monographs}, month = {may}, pages = {133-155}, title = {The application of ecological stoichiometry to plant–microbial–soil organic matter transformations}, url = {https://www.researchgate.net/profile/Maria_Mooshammer/publication/275722791_The_application_of_ecological_stoichiometry_to_plant-microbial-soil_organic_matter_transformations/links/554e62f108ae956a5d23058c.pdf}, volume = {85}, year = {2015} }