{"id":4486,"date":"2023-10-24T07:28:55","date_gmt":"2023-10-24T07:28:55","guid":{"rendered":"http:\/\/the-jena-experiment.de\/?p=4486"},"modified":"2023-12-07T13:29:50","modified_gmt":"2023-12-07T13:29:50","slug":"the-jena-experiment-is-seeking-phd-students-postdoctoral-researchers-and-technical-staff","status":"publish","type":"post","link":"https:\/\/the-jena-experiment.de\/index.php\/2023\/10\/24\/the-jena-experiment-is-seeking-phd-students-postdoctoral-researchers-and-technical-staff\/","title":{"rendered":"The Jena Experiment is seeking PhD students, postdoctoral researchers and technical staff"},"content":{"rendered":"\n<p>Within the DFG Research Unit FOR 5000 (Biotic interactions, community assembly, and eco-evolutionary dynamics as drivers of long-term biodiversity\u2013ecosystem functioning relationships), nine four-year PhD positions, a three-year postdoctoral position, and a position for a technical assistant are available.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"540\" src=\"\/wp-content\/uploads\/field6-1024x540.jpg\" alt=\"\" class=\"wp-image-544\" srcset=\"\/wp-content\/uploads\/field6-1024x540.jpg 1024w, \/wp-content\/uploads\/field6-300x158.jpg 300w, \/wp-content\/uploads\/field6-768x405.jpg 768w, \/wp-content\/uploads\/field6.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>The\nJena Experiment (<a href=\"http:\/\/www.the-jena-experiment.de\">www.the-jena-experiment.de<\/a>) has been\nrunning since 2002 and aims to uncover the mechanisms that determine BEF\nrelationships in the short- and in the long-term. During the last years the Jena Experiment provided\nnovel empirical evidence that ecological and evolutionary processes are intertwined\nin determining biodiversity-ecosystem functioning (BEF) relationships, and\nlong-term experiments are key not only to gain a basic understanding of the\nrelative importance as well as interactions of these processes but also to\napply these concepts to better provisioning of ecosystem functions and\nstability. In the next few years, we will focus on the biodiversity drivers of\necosystem stability, including temporal stability using unique time series and\nstability in response to extreme climate events, such as drought, flooding, hot\nspells, and exceptional frost periods. <\/p>\n\n\n\n<p>We offer an international and interdisciplinary research environment. The involved institutions seek to increase the number of women in those areas where they are underrepresented and therefore explicitly encourage women to apply. We are committed to employing more handicapped individuals and especially encourage them to apply. To learn more about the open positions and how to apply, see the following link: <a href=\"https:\/\/the-jena-experiment.de\/index.php\/job-opportunities\/\">https:\/\/the-jena-experiment.de\/index.php\/job-opportunities\/<\/a><\/p>\n\n\n\n<h2><strong>Subproject 01:\nPlant Physiology<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Claudia Guimar\u00e3es-Steinicke and Hannes Feilhauer,\nLeipzig University<\/p>\n\n\n\n<p><strong>Summary: <\/strong><\/p>\n\n\n\n<p>Climate\nchange will increase the occurrence of extreme events that trigger both species\nevolution and selective removal of not well-acclimated species. Plant biomass\nproduction is a key response indicator of plant community performance under\nunfavorable conditions. However, in biodiversity research, biomass is usually\nmeasured once or twice throughout the growing season, which may hide seasonal\nplant responses during and after extreme events. As physiological processes are\nclosely related to plant biomass production, a comprehensive and continuous\nassessment of plant physiological performance can improve our understanding of\nimmediate responses to and recovery after extreme events and, consequently,\ncarbon assimilation of the plant community. Near-surface remote sensing\ntechnology offers a unique opportunity to assess these dynamic changes and the\ncommunity condition in dense time series.&nbsp;<\/p>\n\n\n\n<p>In\nthis subproject, we aim to understand (1) the physiological response of plants\nto extreme climate events at multiple levels &#8211; from plant organs to communities\n-, and (2) whether increasing plant diversity may lower the consequences of\nsuch extremes. For that, an assessment of fundamental physiological plant\ntraits (via proximal sensing) such as leaf water content, leaf chlorophyll\ncontent, surface temperature, community structure, and leaf angles are\nrequired, as these data can provide a holistic understanding of plant responses\nto drought at different time scales (including resistance to and recovery from\nthe event). We hence intend to 1) assess plant community responses to drought\nbased on hydrological and structural-functional traits, (2) test plant\ncommunity resistance and recovery in different dimensions of community\nstability, and (3) demonstrate how plant functional traits retrieved from\nremote sensing techniques can elucidate the role of biodiversity role in plant\ncommunity resistance to and recovery after extreme events. <\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student<\/p>\n\n\n\n<p><strong>Job advertisement: <\/strong> <a href=\"https:\/\/www.uni-leipzig.de\/stellenausschreibung\/artikel\/wissenschaftlicher-mitarbeiter-m-w-d-2023-10-27\">https:\/\/www.uni-leipzig.de\/stellenausschreibung\/artikel\/wissenschaftlicher-mitarbeiter-m-w-d-2023-10-27<\/a><\/p>\n\n\n\n<p><strong>Contact: <\/strong>Dr. Claudia Guimaraes (<a href=\"mailto:claudia.steinicke@uni-leipzig.de\">claudia.steinicke@uni-leipzig.de<\/a>)<\/p>\n\n\n\n<h2><strong>Subproject 02: Chemical\nInteractions<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Unsicker, Sybille, Kiel University; Weisser,\nWolfgang, Technical University of Munich<\/p>\n\n\n\n<p><strong>Summary: <\/strong><\/p>\n\n\n\n<p>Plants constitutively release a large diversity of volatile organic\ncompounds (VOC) from their organs. However, when attacked by e.g. herbivorous\ninsects, VOCs are released at much higher concentrations and in greater\ndiversity. Abiotic factors such as light, water availability, and temperature\ncan also strongly influence plant VOC emission. In their natural environment,\nplants are often simultaneously exposed to abiotic and biotic stress, and this\ncombined stress can lead to synergistic effects that cannot be predicted by\nindividual stress events. To date, we know little about the stability of VOC emissions\nfrom individual plants and plant communities, and we don\u00b4t know whether the\nspecies-specific responses of plants to biotic and abiotic stresses lead to\nstabilization of VOC emissions at the community level when communities are more\ndiverse, as predicted by the portfolio effect. Our previous results show that\nplant species richness effects the VOC emission of plant communities and plant\nindividuals within those communities.<\/p>\n\n\n\n<p>In this\nsubproject, our main aim is to investigate whether plant diversity stabilises\nplant VOC emission as an important ecosystem function, both over time and\nduring periods of resistance and recovery during and after an extreme climate\nevent. We will use repeated measurements throughout the growing season to\nassess the temporal stability of plant VOC emission. In addition, we will\nmeasure VOC emission in response to an extreme climate event, i.e. a hot\ndrought, in an Ecotron experiment. <\/p>\n\n\n\n<p>Finally, we will\ntest whether plant species richness can buffer the effects of combined biotic\nand abiotic stress on VOC emissions of individual plant species and plant\ncommunities in a microcosm experiment. Our measurements of VOC emission will also\ncontribute to test the Research Unit\u00b4s main hypothesis that multifunctional\nstability is highest in high-diversity plots.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student;<\/p>\n\n\n\n<p> <strong>Job advertisement:<\/strong> <a href=\"https:\/\/www.uni-kiel.de\/personal\/de\/stellen\/extern\/wiss\">Wissenschaftliche*r  Mitarbeiter*in mit M\u00f6glichkeit zur Promotion am Botanischen Institut,  Abteilung f\u00fcr Pflanzen-Umwelt-Interaktion<\/a>  (<a href=\"https:\/\/the-jena-experiment.de\/wp-content\/uploads\/Stellenausschreibung_WiMi_DFG_Unsicker.pdf\">PDF download<\/a>)<\/p>\n\n\n\n<h2><strong>Subproject 03: Root\ntrait diversity<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Weigelt, Alexandra, Leipzig University; Mommer,\nLiesje, Wageningen University<\/p>\n\n\n\n<p><strong>Summary: <\/strong><\/p>\n\n\n\n<p>Biodiversity can be considered as the earth\u2019s safety net for mitigating\nclimate change, as biodiversity is known to increase ecosystem functioning and\nstability. It is often hypothesised that increased species richness in\ngrasslands increases resistance and recovery of plant communities to drought.\nDespite the urgency of the topic due to the increasing frequency and intensity\nof droughts worldwide, the underlying mechanisms of these beneficial\nbiodiversity effects are not fully understood. Specifically, we have an\nincomplete perspective of how plant functional trait composition and diversity\ndrive resistance to and recovery after drought. <\/p>\n\n\n\n<p>In this subproject, we aim to provide an integrated perspective on plant\nfunctional traits \u2013 with a focus on root traits \u2013 to advance our mechanistic\nunderstanding of plant community responses to drought. We will build on a\nrecently developed plant trait framework, that for the first time, integrated\nabove- and belowground plant functional traits, and will expand it with 1) <em>plant hydraulic traits<\/em>,as these have not been implemented in the framework\nyet, and 2)<em> root biomass\nallocation<\/em>,as the\npotential to increase root biomass allocation to deeper soil layers might be\nfundamental for understanding plant responses to drought. <\/p>\n\n\n\n<p>First, we will select the most relevant shoot, root, and hydraulic\ntraits in a workshop with a diverse team of international experts and test\nthese traits at the species level in a microcosm experiment. Then, we will\nscale up to the community level to disentangle effects of average trait\ncomposition and diversity for resistance to and recovery after droughts.\nFinally, we will elucidate the importance of functional\ndiversity at the community level for resistance to and recovery after droughts.\nThis knowledge on plant functional traits will be essential to design and\nrestore plant communities that are resilient to climate change.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student<\/p>\n\n\n\n<p><strong>Job advertisement: <\/strong> <a href=\"https:\/\/www.uni-leipzig.de\/en\/university\/working-at-leipzig-university\/job-opportunities\/detailed-view-job-description\/artikel\/wissenschaftlicher-mitarbeiter-m-w-d-2023-10-25\">https:\/\/www.uni-leipzig.de\/en\/university\/working-at-leipzig-university\/job-opportunities\/detailed-view-job-description\/artikel\/wissenschaftlicher-mitarbeiter-m-w-d-2023-10-25<\/a> <\/p>\n\n\n\n<p><strong>Contact:<\/strong> Prof. Dr. Alexandra Weigelt (<a href=\"mailto:alexandra.weigelt@uni-leipzig.de\">alexandra.weigelt@uni-leipzig.de<\/a>)<strong><em><br>\n<\/em><\/strong><\/p>\n\n\n\n<h2><strong>Subproject 05:\nSoil nutrient dynamics<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Yvonne Oelmann, University of T\u00fcbingen<\/p>\n\n\n\n<p><strong>Summary: <\/strong>Extreme events such as floods or droughts affect the\navailability of water and, thus, inevitably impact nutrient cycling in soils.\nThe majority of grassland studies reported a nutrient flush in soil upon\nrewetting after drought which is eventually followed by nutrient leaching\nlosses compromising water quality after droughts. The nutrient flush is linked\nto nutrient dynamics of plants and soil microorganisms and is determined by\nopposing processes during the drought (= resistance) and after the subsequent\nrewetting (= recovery).<\/p>\n\n\n\n<p>The objectives\nof our subproject SP05 are (i) to assess the resistance and recovery of soil\nmicrobial nutrient dynamics during and after a drought, respectively, (ii) to\ntest the effect of plant diversity on the resistance and recovery of microbial\nnutrient dynamics in soil and link this to other organisms (plants, soil\nfauna), and (iii) to test the long-term effect of plant diversity on soil\nnutrient dynamics under extreme events. We hypothesize that the soil microbial\ncommunity reduces nutrient uptake and is prone to nutrient release during\ndrought but rapidly takes up nutrients after a drought. In other words,\nmicrobial nutrient pools in soil quickly recover after drought and furthermore,\nfaster at high as compared to low plant diversity. At high plant diversity, the\nnutrient dynamics of soil microorganisms and other organisms are complementary,\ni.e. temporally asynchronous. Consequently, plant diversity stabilizes nutrient\ndynamics in spite of frequent extreme events in the long run.<\/p>\n\n\n\n<p>To test these\nhypotheses, our research will be based on the common research platforms (ResCUE\nExperiment; Main Experiment). We will rely on data of different temporal\nresolutions to assess nutrient dynamics related to resistance, recovery and\nstability. We will use state-of-the-art methods (soil microbial nutrient\nconcentrations), stable isotope labeling and natural abundance levels of stable\nisotopes. <\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student<\/p>\n\n\n\n<p><strong>Job\nadvertisement: <\/strong><a href=\"https:\/\/uni-tuebingen.de\/universitaet\/stellenangebote\/newsfullview-stellenangebote\/article\/research-position-in-the-dfg-ru-for-5000-the-jena-experiment-f-m-d-e-13-tv-l-65\/\">https:\/\/uni-tuebingen.de\/universitaet\/stellenangebote\/newsfullview-stellenangebote\/article\/research-position-in-the-dfg-ru-for-5000-the-jena-experiment-f-m-d-e-13-tv-l-65\/<\/a><\/p>\n\n\n\n<p><strong>Contact:<\/strong> Prof. Dr. Yvonne Oelmann (<a href=\"mailto:yvonne.oelmann@uni-tuebingen.de\">yvonne.oelmann@uni-tuebingen.de<\/a>)<strong><br>\n<\/strong><\/p>\n\n\n\n<h2><strong>Subproject 06: Plant nutrient responses<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> PD Dr. Christiane Roscher, UFZ\/iDiv<\/p>\n\n\n\n<p><strong>Summary: <\/strong>Plant tissue nutrient concentrations and ratios are\nimportant predictors of ecosystem processes and ecological interactions. The\nmajor objective of the subproject \u201cPlant nutrient responses\u201d is to study the\neffects of plant diversity on the temporal dynamics of plant nutrient\nresponses, including their stability as temporal long-term invariability,\nresistance during and recovery after environmental perturbations. Specifically,\nwe will (1) analyze time-series data of community-level elemental\nconcentrations, ratios and stocks of carbon (C), nitrogen (N), phosphorus (P)\nand potassium (K) in plant aboveground biomass to identify the drivers\nunderlying diversity effects on plant community nutrient responses and their\ntemporal variability. (2) We will study species-specific leaf concentrations of\nC, N, P and K to decompose the importance of plant community composition versus\nthe importance of intraspecific variation in leaf nutrient concentrations for\nthe community means and diversity of plant tissue elemental concentrations in\nthe long-term biodiversity experiment, which cannot be disentangled alone with\ncommunity-level data. (3) We will study the species-specific uptake of isotopic\ntracers (<sup>15<\/sup>N, <sup>13<\/sup>C) and carbon and nitrogen concentrations\nin plant aboveground biomass during the drought and re-wetting phase of the <em>ResCUE\nExperiment<\/em> (an Ecotron experiment) to assess how plant and functional trait\ndiversity buffer against the decline in community-level C and N uptake during\ndrought and promote increased community-level C and N uptake when plant\ncommunities recover during re-wetting.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student<\/p>\n\n\n\n<p><strong>Job advertisement:<\/strong> <a href=\"https:\/\/recruitingapp-5128.de.umantis.com\/Vacancies\/2835\/Description\/2\">https:\/\/recruitingapp-5128.de.umantis.com\/Vacancies\/2835\/Description\/2<\/a><\/p>\n\n\n\n<p><strong>Contact:<\/strong> PD Dr. Christiane Roscher (<a href=\"mailto:christiane.roscher@ufz.de\">christiane.roscher@ufz.de<\/a>)<strong><br>\n<\/strong><\/p>\n\n\n\n<h2> <strong>Subproject<\/strong> <strong>07: Soil multistability<\/strong><\/h2>\n\n\n\n<p><strong>Principle Investigators: <\/strong>Nico Eisenhauer, Leipzig\nUniversity; Simone Cesarz, Leipzig University; Cordula Vogel, Technical\nUniversity Dresden<\/p>\n\n\n\n<p><strong>Summary:<\/strong><\/p>\n\n\n\n<p>Healthy and stable soil is a prerequisite for\nwell-functioning terrestrial ecosystems and has thus been proposed to play a\nkey role in plant diversity\u2013ecosystem functioning relationships. The overall\nobjective of this subproject is to study multidimensional soil stability as\naffected by plant diversity in a long-term plant diversity experiment. We\ndesigned three coordinated work packages (WPs) to comprehensively assess soil\nmultistability to environmental fluctuations and climate extremes by\nconsidering the biological, chemical, physical dimensions that are key for soil\nfunctioning. In close collaboration with other subprojects, we will assess\nbiological, chemical, and physical soil properties and stability indicators\nthat will be used to calculate soil multifunctionality and multistability\nindices. We propose to use a combination of simple, high-throughput (e.g.,\nbait-lamina test) and more sophisticated methods (e.g., extracellular polymeric\nsubstances analyses) to be able to investigate temporal dynamics of soil\nprocesses and their mechanistic basis. <\/p>\n\n\n\n<p>With this project the PhD student will learn to\nuse a wide portfolio of field and lab techniques in plant and soil ecology as\nwell as novel statistical approaches to assess soil multifunctionality and\nmultistability under drought stress.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student<\/p>\n\n\n\n<p> <strong>Job advertisement<\/strong> : <a href=\"https:\/\/www.uni-leipzig.de\/en\/newsdetail?tx_news_pi1%5Bnews_preview%5D=154693&amp;cHash=1327fd1a87316cb5aa06a426c8434ebe\">https:\/\/www.uni-leipzig.de\/en\/newsdetail?tx_news_pi1%5Bnews_preview%5D=154693&amp;cHash=1327fd1a87316cb5aa06a426c8434ebe<\/a><\/p>\n\n\n\n<p><strong>Contact:<\/strong> Prof. Dr. Nico Eisenhauer (<a href=\"mailto:nico.eisenhauer@idiv.de\">nico.eisenhauer@idiv.de<\/a>) <br>\n<\/p>\n\n\n\n<h2><strong>Subproject 08: Microbiome &amp; Stress<\/strong><\/h2>\n\n\n\n<p><strong>Principle Investigators:<\/strong>\nStefanie Schulz, Helmholtz Zentrum M\u00fcnchen; Michael Schloter, Technische\nUniversit\u00e4t M\u00fcnchen<\/p>\n\n\n\n<p><strong>Summary: <\/strong>If you are eager to apply molecular, isolation and\ninoculation techniques to answer burning questions related to\nplant-microbe-interactions under drought stress, this project is waiting for\nyou! <\/p>\n\n\n\n<p>We will use modern techniques\nlike metagenomic sequencing, microbial isolation as well as their phenotypic\nand genotypic characterization to shed light on the following research\nquestions: 1) How does plant diversity alter the relative abundance and\ndiversity of bacteria exhibiting different drought-tolerance traits? 2) At\nwhich drought intensity do drought-resistant bacteria prevail and how is that\nmediated by plant diversity? 3) How do drought-tolerance traits of seed and\nsoil-derived bacteria differ and improve plant survival under stress? We will\nuse the Y-A-S ecological framework to classify drought resistance traits in the\ncategories related to yield improvement (Y), nutrient acquisition (A) and\nstress tolerance (S). This framework will be applied in several experiments,\nwhich include field sampling campaigns of the \u201cJena Experiment\u201d field site as\nwell as a series of short-term incubation experiments which test the effect of\nincreasing drought and plant diversity levels or the efficiency of the isolated\ndrought-tolerant bacteria to mitigate plant-drought stress. <\/p>\n\n\n\n<p>With this project the PhD student\nwill learn to use state-of-the-art wet lab and bioinformatic tools to improve\nour knowledge about plant-microbe mitigation strategies under drought stress. <\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD\nstudent<\/p>\n\n\n\n<p><strong>Job advertisement: <\/strong><a href=\"https:\/\/www.helmholtz-munich.de\/karriere\/jobs-filter?karriere=8\">https:\/\/www.helmholtz-munich.de\/karriere\/jobs-filter?karriere=8<\/a> (pending)<\/p>\n\n\n\n<p><strong>Contact:\n<\/strong>Dr.Stefanie Schulz (<a href=\"mailto:stefanie.schulz@helmholtz-munich.de\">stefanie.schulz@helmholtz-munich.de<\/a>)<br><\/p>\n\n\n\n<h2><strong>Subproject 09: Plant antagonists<\/strong><\/h2>\n\n\n\n<p><strong>Principle Investigators:<\/strong> Michael Bonkowski, University of Cologne; Sigrid\nNeuhauser, University of Innsbruck<\/p>\n\n\n\n<p><strong>Summary:<\/strong><\/p>\n\n\n\n<p>Microbial plant\npathogens play important roles in biodiver\u00adsity-ecosystem function\nrelationships. This project investiga\u00adtes the roles of Oomycetes and Phytomyxea\n(Protists) in combination with drought on plant performance within gradients of\nincreasing plant diversity in the Jena Experi\u00adment.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD\nstudent <\/p>\n\n\n\n<p><strong>Job advertisement: <\/strong><a href=\"https:\/\/jobportal.uni-koeln.de\/\">https:\/\/jobportal.uni-koeln.de\/<\/a>, reference number Wiss2310-09<\/p>\n\n\n\n<p><strong>Contact: <\/strong>Prof. Dr. Michael Bonkowski (<a href=\"mailto:m.bonkowski@uni-koeln.de\">m.bonkowski@uni-koeln.de<\/a>)<br><\/p>\n\n\n\n<h2><strong>Subproject 10:\nConsumers and functions<\/strong><\/h2>\n\n\n\n<p><strong>Principle Investigators:<\/strong> Anne Ebeling, Friedrich-Schiller-University Jena;\nSebastian T. Meyer, Technical University of Munich<\/p>\n\n\n\n<p><strong>Summary:<\/strong><\/p>\n\n\n\n<p>Invertebrates in grasslands are highly diverse and essential for trophic interactions and ecosystem functioning. Plant diversity begets invertebrate diversity. However, variable environmental conditions and extremes particularly related to ongoing climate change induce fluctuations in these relationships. Thus, it is essential to investigate the temporal dynamics in consumer communities and their drivers and to identify buffering mechanisms because these can have profound implications for the stability and functioning of entire food webs.<\/p>\n\n\n\n<p>We will use a combination of statistical analyses of long-term\ndata series, field measurements and targeted microcosm experiments. We will quantify two essential\nfunctions (herbivory and predation) together with the investigation of the\nconsumer communities, both, in the field and in microcosm experiments.\nCombining these approaches, we will study three research questions: 1) What causes temporal variability in\nconsumer communities and associated functions? 2) Does plant diversity have a stabilizing\neffect on invertebrate consumer communities and associated ecosystem functions?\n3) Which dynamics and properties of the consumer communities underlie these\neffects? <\/p>\n\n\n\n<p>With\nthis project and its holistic approach, the PhD student will understand the\ninterplay between plants and higher trophic levels, apply advanced statistical\nmethods on time-series data, and further our knowledge on the dynamics\nof the functioning of consumer and plant communities. <\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD\nstudent<\/p>\n\n\n\n<p><strong>Job advertisement: <\/strong> <a href=\"https:\/\/jobs.uni-jena.de\/jobposting\/0babc2098050cd01d655bc63e091bd8938623c190\">https:\/\/jobs.uni-jena.de\/jobposting\/0babc2098050cd01d655bc63e091bd8938623c190<\/a><\/p>\n\n\n\n<p><strong>Contact: <\/strong>PD Dr. Anne Ebeling (<a href=\"mailto:anne.ebeling@uni-jena.de\">anne.ebeling@uni-jena.de<\/a>)<strong><br>\n<\/strong><\/p>\n\n\n\n<h2><strong>Subproject 11:\nNetworks and energy fluxes<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Stefan Scheu, University of G\u00f6ttingen, Ulrich Brose,\nUniversity of Jena &amp; iDiv, Leipzig<\/p>\n\n\n\n<p class=\"justify\"><strong>Summary: <\/strong>The\nproject addresses the quantitative structure and stability of soil food webs\nalong the plant diversity gradients of the Main Experiment and the ResCUE\nExperiment of the Research Unit 5000. The project is based on the assumption\nthat changes in plant community diversity and composition exert bottom-up\neffects on the structure of and energy flux through soil food webs. The project\nfocuses on (1) the role of plant diversity for the temporal (seasonal) and\nspatial (depth distribution) stability of the structure of belowground\ncommunities, (2) the role of plant diversity for the temporal (seasonal) and\nspatial (depth distribution) stability of energy channeling through belowground\ncommunities, and (3) the response of the structure of and the energy flux through\nthe belowground community to plant diversity and a hot drought disturbance.<\/p>\n\n\n\n<p class=\"justify\">The energy-flux analyses will focus on broad functional groups, such as\nprimary and secondary decomposers, herbivores, as well as predators. This will\nbe complemented by more detailed analyses using compound-specific analysis of\nstable isotopes of amino acids allowing to separate the fluxes into the\nbacterial-, fungal-, and plant-based energy channels. The resulting data will\nprovide unique insights into variations in the energetic structure of soil food\nwebs as affected by plant diversity. Differences in energy fluxes to\nbelowground consumers will result in significant feedback effects that will be\nkey to mechanistically explain biodiversity\u2013ecosystem function relationships\nthrough multi-trophic interactions. <\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 PhD student<\/p>\n\n\n\n<p><strong>Job advertisement: <\/strong> <a href=\"https:\/\/www.uni-goettingen.de\/de\/document\/download\/cf30ef29afc5a561595478c2c3699cea.pdf\/Stellenausschreibung-PhD-Goettingen_Jena-experiment-2024.pdf\">https:\/\/www.uni-goettingen.de\/en\/news\/111737.html<\/a> <\/p>\n\n\n\n<p><strong>Contact: <\/strong>Prof. Dr. Stefan Scheu (<a href=\"mailto:sscheu@gwdg.de\">sscheu@gwdg.de<\/a>)<br><\/p>\n\n\n\n<h2><strong>Subproject Z2:\nDatabase and synthesis<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Holger Schielzeth, University Jena; Anne Ebeling,\nUniversity Jena<\/p>\n\n\n\n<p><strong>Summary: <\/strong>Stability of ecosystems refers to the persistence of\necological processes in a given area over a long period of time, even during\nperiods of sudden or chronic climate change. One factor that contributes to\nstability via multiple mechanisms is biodiversity. Using a multitrophic\nmultifunctionality approach, we will study whether plant diversity promotes two\npotential indicator variables of spatial and temporal stability, the covariance\nof ecosystem functions and the accumulation of consumer species.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1 Postdoc position<\/p>\n\n\n\n<p><strong>Job\nadvertisement: <\/strong><a href=\"https:\/\/jobs.uni-jena.de\/jobposting\/8aabd337bcf7dc879c4848b646523459614dc9b20\">https:\/\/jobs.uni-jena.de\/jobposting\/8aabd337bcf7dc879c4848b646523459614dc9b20<\/a><\/p>\n\n\n\n<p><strong>Contact: <\/strong>Prof. Dr. Holger Schielzeth (<a href=\"mailto:holger.schielzeth@uni-jena.de\">holger.schielzeth@uni-jena.de<\/a>)<strong><br>\n<\/strong><\/p>\n\n\n\n<h2><strong>Subproject Z1:\nCoordination<\/strong><\/h2>\n\n\n\n<p><strong>Principle\nInvestigators:<\/strong> Gerd Gleixner, Max\nPlanck Institute for Biogeochemistry, Jena, Germany<\/p>\n\n\n\n<p><strong>Summary: <\/strong>In the Jena Experiment, the\ninfluence of biodiversity on element cycling is investigated. For the long-term\nobservation of soil characteristics, we will quantify carbon and nitrogen\nconcentrations in the bulk soil and in the soil solution. Resulting long-term\ndatasets will allow analyses of links between carbon, nutrient, and water\ndynamics within and beyond the Jena Experiment. We are looking for a technical\nassistant to organize and carry out soil, water and gas sampling, to process\nsamples in the laboratory, as well as for quality control and provision of the\nmeasurement data for further scientific analysis.<\/p>\n\n\n\n<p><strong>Available positions:<\/strong> 1\nTechnical Assistant<\/p>\n\n\n\n<p><strong>Job advertisement<\/strong><strong>:<\/strong> <a href=\"https:\/\/www.bgc-jena.mpg.de\/en\/jobs\">https:\/\/www.bgc-jena.mpg.de\/en\/jobs<\/a>\n(pending)<\/p>\n\n\n\n<p><strong>Contact: <\/strong>  Prof. Dr.  Gerd  Gleixner (<a href=\"mailto:ggleix@bgc-jena.mpg.de\">ggleix@bgc-jena.mpg.de<\/a>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Within the DFG Research Unit FOR 5000 (Biotic interactions, community assembly, and eco-evolutionary dynamics as drivers of long-term biodiversity\u2013ecosystem functioning relationships), nine four-year PhD positions, a three-year postdoctoral position, and&hellip;<\/p>\n","protected":false},"author":2,"featured_media":3948,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,20],"tags":[],"_links":{"self":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/4486"}],"collection":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/comments?post=4486"}],"version-history":[{"count":17,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/4486\/revisions"}],"predecessor-version":[{"id":4621,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/4486\/revisions\/4621"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/media\/3948"}],"wp:attachment":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/media?parent=4486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/categories?post=4486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/tags?post=4486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}