@article{GuerreroRamirezCravenReichetal.2017, author = {Guerrero-Ramirez, Nathaly Rokssana and Craven, Dylan and Reich, Peter B. and Ewel, John J. and Isbell, Forest and Koricheva, Julia and Parrotta, John A. and Auge, Harald and Erickson, Heather E. and Forrester, David I. and Hector, Andy and Joshi, Jasmin Radha and Montagnini, Florencia and Palmborg, Cecilia and Piotto, Daniel and Potvin, Catherine and Roscher, Christiane and van Ruijven, Jasper and Tilman, David and Wilsey, Brian and Eisenhauer, Nico}, title = {Diversity-dependent temporal divergence of ecosystem functioning in experimental ecosystems}, series = {Nature ecology \& evolution}, volume = {1}, journal = {Nature ecology \& evolution}, number = {11}, publisher = {Nature Publ. Group}, address = {London}, issn = {2397-334X}, doi = {10.1038/s41559-017-0325-1}, pages = {1639 -- 1642}, year = {2017}, abstract = {The effects of biodiversity on ecosystem functioning generally increase over time, but the underlying processes remain unclear. Using 26 long-term grassland and forest experimental ecosystems, we demonstrate that biodiversity-ecosystem functioning relationships strengthen mainly by greater increases in functioning in high-diversity communities in grasslands and forests. In grasslands, biodiversity effects also strengthen due to decreases in functioning in low-diversity communities. Contrasting trends across grasslands are associated with differences in soil characteristics.}, language = {en} } @article{SteinRissmannHempeletal.2009, author = {Stein, Claudia and Rißmann, Cornelia and Hempel, Stefan and Renker, Carsten and Buscot, Francois and Prati, Daniel and Auge, Harald}, title = {Interactive effects of mycorrhizae and a root hemiparasite on plant community productivity and diversity}, issn = {0029-8549}, doi = {10.1007/s00442-008-1192-x}, year = {2009}, abstract = {Plant communities can be affected both by arbuscular mycorrhizal fungi (AMF) and hemiparasitic plants. However, little is known about the interactive effects of these two biotic factors on the productivity and diversity of plant communities. To address this question, we set up a greenhouse study in which different AMF inocula and a hemiparasitic plant (Rhinanthus minor) were added to experimental grassland communities in a fully factorial design. In addition, single plants of each species in the grassland community were grown with the same treatments to distinguish direct AMF effects from indirect effects via plant competition. We found that AMF changed plant community structure by influencing the plant species differently. At the community level, AMF decreased the productivity by 15-24\%, depending on the particular AMF treatment, mainly because two dominant species, Holcus lanatus and Plantago lanceolata, showed a negative mycorrhizal dependency. Concomitantly, plant diversity increased due to AMF inoculation and was highest in the treatment with a combination of two commercial AM strains. AMF had a positive effect on growth of the hemiparasite, and thereby induced a negative impact of the hemiparasite on host plant biomass which was not found in non-inoculated communities. However, the hemiparasite did not increase plant diversity. Our results highlight the importance of interactions with soil microbes for plant community structure and that these indirect effects can vary among AMF treatments. We conclude that mutualistic interactions with AMF, but not antagonistic interactions with a root hemiparasite, promote plant diversity in this grassland community.}, language = {en} } @article{SteinUnsickerKahmenetal.2010, author = {Stein, Claudia and Unsicker, Sybille B. and Kahmen, Ansgar and Wagner, Markus and Audorff, Volker and Auge, Harald and Prati, Daniel and Weisser, Wolfgang W.}, title = {Impact of invertebrate herbivory in grasslands depends on plant species diversity}, issn = {0012-9658}, doi = {10.1890/09-0600.1}, year = {2010}, abstract = {Invertebrate herbivores are ubiquitous in most terrestrial ecosystems, and theory predicts that their impact on plant community biomass should depend on diversity and productivity of the associated plant communities. To elucidate general patterns in the relationship between invertebrate herbivory, plant diversity, and productivity, we carried out a long-term herbivore exclusion experiment at multiple grassland sites in a mountainous landscape of central Germany. Over a period of five years, we used above-and belowground insecticides as well as a molluscicide to manipulate invertebrate herbivory at 14 grassland sites, covering a wide range of plant species diversity (13-38 species/m(2)) and aboveground plant productivity (272-1125 g.m(-2).yr(-1)), where plant species richness and productivity of the sites were not significantly correlated. Herbivore exclusion had significant effects on the plant communities: it decreased plant species richness and evenness, and it altered plant community composition. In particular, exclusion of belowground herbivores promoted grasses at the expense of herbs. In contrast to our expectation, herbivore effects on plant community biomass were not influenced by productivity. However, effect size of invertebrate herbivores was negatively correlated with plant diversity of the grasslands: the effect of herbivory on biomass tended to be negative at sites of high diversity and positive at sites of low diversity. In general, the effects of aboveground herbivores were relatively small as compared to belowground herbivores, which were important drivers of plant community composition. Our study is the first to show that variation in the effects of invertebrate herbivory on plant communities across a landscape is significantly influenced by plant species richness.}, language = {en} } @article{WeiseAugeBaessleretal.2020, author = {Weise, Hanna and Auge, Harald and Baessler, Cornelia and B{\"a}rlund, Ilona and Bennett, Elena M. and Berger, Uta and Bohn, Friedrich and Bonn, Aletta and Borchardt, Dietrich and Brand, Fridolin and Jeltsch, Florian and Joshi, Jasmin Radha and Grimm, Volker}, title = {Resilience trinity}, series = {Oikos}, volume = {129}, journal = {Oikos}, number = {4}, publisher = {Wiley-Blackwell}, address = {Oxford}, issn = {0030-1299}, doi = {10.1111/oik.07213}, pages = {445 -- 456}, year = {2020}, abstract = {Ensuring ecosystem resilience is an intuitive approach to safeguard the functioning of ecosystems and hence the future provisioning of ecosystem services (ES). However, resilience is a multi-faceted concept that is difficult to operationalize. Focusing on resilience mechanisms, such as diversity, network architectures or adaptive capacity, has recently been suggested as means to operationalize resilience. Still, the focus on mechanisms is not specific enough. We suggest a conceptual framework, resilience trinity, to facilitate management based on resilience mechanisms in three distinctive decision contexts and time-horizons: 1) reactive, when there is an imminent threat to ES resilience and a high pressure to act, 2) adjustive, when the threat is known in general but there is still time to adapt management and 3) provident, when time horizons are very long and the nature of the threats is uncertain, leading to a low willingness to act. Resilience has different interpretations and implications at these different time horizons, which also prevail in different disciplines. Social ecology, ecology and engineering are often implicitly focussing on provident, adjustive or reactive resilience, respectively, but these different notions of resilience and their corresponding social, ecological and economic tradeoffs need to be reconciled. Otherwise, we keep risking unintended consequences of reactive actions, or shying away from provident action because of uncertainties that cannot be reduced. The suggested trinity of time horizons and their decision contexts could help ensuring that longer-term management actions are not missed while urgent threats to ES are given priority.}, language = {en} }