CREAF eMETA-RARE Predoctoral Researcher: Elemental Ecology and Plant Rarity

CREAF eMETA-RARE Predoctoral Researcher: Elemental Ecology and Plant Rarity

Research Question and Applicant Fit

Why are some plants abundant while others remain rare? eMETA-RARE tests whether elemental composition and metabolism help distinguish their ecological strategies across species, seasons and environmental gradients. The combination of regional inventories, repeated forest observations and supervised analytical work suits a botanically experienced applicant who wants to develop quantitative ecological inference. It is a hypothesis-led project, not an established chemical explanation of rarity. Exact recruitment notice.

CREAF is the advertised employer; the degree-awarding university and doctoral programme remain unnamed. Applications close on 16 November 2026, with no official cutoff clock. The offer is for at least 48 months, 37.5 hours/week and €25,456.15 gross annually. The planned January 2027 start depends on final project approval and eligible expenditure; payment frequency and individual deductions are unknown.

Research Problem and Doctoral Responsibilities

The project asks why some plant species are abundant while others are rare, and whether their elementomes, metabolomes and associated biogeochemical or metabolic niches differ. It compares individuals, populations and species across local and regional scales and environmental gradients. The official narrative specifies vegetation inventories in northeastern Spain and seasonal surveys of several forests over two years. Laboratory work compares elemental and metabolic flexibility under environmental and nutritional change. These are related lines of enquiry, not an already proven explanation of rarity. Official research narrative.

Duties include field collection of plant material, mainly laboratory work at CREAF, metabolomics work at ICIFOR-INIA in Madrid, data curation and statistical analysis, leading scientific articles and contributing to other group projects. The advert promises progressive training in elemental ecology, analytical chemistry and ecological metabolomics, with specialist supervision for complex analytical components. It also expects initiative and increasing quantitative independence. It does not require the applicant to arrive already proficient in every analytical technique. The exact Madrid arrangements, travel funding and division of supervision remain unconfirmed. PI laboratory’s exact call.

School, Subject and Doctoral Training

CREAF is an ecology research centre and public consortium located on the UAB campus at Bellaterra. Its institutional introduction distinguishes basic and applied ecosystem research and global-change work; its 2022 headcounts or historical board names should not be treated as current staffing. Institutional introduction, selected pages 6–7. The saved annual-report summary describes CERCA A evaluation, Severo Ochoa development and science-policy activity, while also acknowledging challenges concerning space, laboratories and employment conditions. These provide research-environment signals rather than a guarantee about one student’s daily experience. 2025 institutional results, published 2026.

No university ranking is assigned to this opportunity because its degree-awarding university has not been established. CREAF’s location at UAB and the supervisor’s previous UAB doctorate do not settle that question. A missing ranking should not be interpreted as evidence of a weak research host. Assessment here rests on the actual group, original publications, training arrangements and unresolved registration conditions.

CREAF coordinates university-linked doctoral activity, including UAB Terrestrial Ecology, but that general relationship does not assign this particular post to that programme. Consequently, its admission calendar, tuition, training credits, formal annual review and thesis rules remain to be confirmed with the hiring team and the eventual doctoral school. Do not transplant another CREAF vacancy’s UAB deadline or fee schedule. CREAF academic overview. CREAF career support includes predoctoral activities, workshops and career guidance; its formal paired mentoring scheme is described for postdocs and cannot be promised here. Career development.

Field and disciplinary outlook

Elemental ecology connects organisms’ chemical composition with functional differences and ecosystem processes. eMETA-RARE adds metabolic variation and rarity across scales. The interesting scientific challenge is to separate a genuinely informative niche signal from effects of species identity, environment, size, season and sampling. Regional inventories and repeated observations can address different parts of that challenge, but relationships across those datasets are not automatically causal.

The Elemental Diversity and Macroecology group explicitly works across organismal composition, ecosystem functioning and biogeochemical cycles. Its active team offers relevant intellectual surroundings; listed colleagues are not automatically allocated co-supervisors. EDM group. The separate STOIKOS project combines observational, experimental and theoretical approaches to elemental diversity. Its ERC award runs from 1 May 2023 to 30 April 2028 with CREAF as coordinator and a total EU contribution of €1,499,694. That is institutional research context, not this candidate’s stipend or the funding source of eMETA-RARE. CREAF STOIKOS; CORDIS grant record.

Supervisor and Research Conditions

The exact advert identifies Marcos Fernández-Martínez as the responsible scientific contact. CREAF’s saved profile lists him as a Researcher; the group page identifies him as EDM leader. Neither warrants inventing a professor title or a confirmed co-supervision committee. His 2025 Ángeles Alvariño research award and ERC trajectory are evidence of research recognition, not evidence of meeting frequency, mentoring style or guaranteed time for a new student. Current staff profile; Official award account.

Three recent original studies: evidence and limitations

The following are three distinct, published original studies within the last five years. The 22 October 2026 reading record covers selected substantive full-text sections, including abstracts, discussion or conclusions, limitations and author roles, with targeted methodological context. This is not a claim to have read every page, reference or supplement, or to have reproduced the analyses. Review articles and a preprint version of the same published study do not add to the count.

1. M. Fernández-Martínez; A. Martín; E. Rodríguez-Penedo; S. Poblador; E. Romero; F. Sabater; R. Grau-Andrés. “Experimental Evidence of High-Dimensional Elementome Shifts Due to Coexistence and Its Effects on Growth Rates.” Ecology Letters 29(9), e70456 (2026), first published 20 September 2026. DOI: 10.1111/ele.70456. All seven authors are retained in the publisher’s printed order; unverified given-name expansions, particularly A. Martín, are not invented. Published study.

This experimental study is the closest direct test of the elemental-niche premise. Coexistence was associated with multidimensional elementome shifts, including convergence rather than a universal divergence pattern. Crucially, it did not demonstrate a general increase in community growth. Its short duration and limited environmental variation restrict extrapolation. It therefore supports asking sharper questions about elemental niches, not claiming that elemental differentiation already explains plant rarity or universally improves productivity. Marcos is first and co-corresponding author with design, experimental, analytical and drafting roles. Selected discussion, conclusion, contribution and data sections were read; supplements and the full experimental workflow were not audited.

2. Écio Souza Diniz; Eladio Rodríguez-Penedo; Roger Grau-Andrés; Jordi Vayreda; Marcos Fernández-Martínez. “Optimal set of leaf and aboveground tree elements for predicting forest functioning.” Biogeosciences 22(8), 2115–2132 (2025), accepted 12 February 2025, published 30 April 2025. DOI: 10.5194/bg-22-2115-2025. Published study.

The study combines 2,000 forest plots with 2,227 trees across 48 species in northeastern Iberia to compare elemental stocks and concentrations across leaf and aboveground measures. Foliar stocks performed well for predicting biomass production, while stand age remained important for productivity. Production and productivity, and elemental stocks and concentrations, must remain distinct. Belowground elements were excluded and species sampling was uneven, limiting universal interpretation. This is a particularly relevant field and statistical foundation for the advertised regional work. Marcos is last and co-corresponding author, with methodology, validation, supervision, project administration, funding and revision roles rather than first-author formal analysis. Selected study-system, sample, discussion, conclusion and contribution sections were read. The stated data-on-request and public-code arrangements were checked, but the underlying dataset and code were not independently audited.

3. Marcos Fernández-Martínez; Ivan A. Janssens; Michael Obersteiner; Peter Manning; Filipe M. Andrade; Eladio Rodríguez-Penedo; Josep Peñuelas. “Temporal complexity of terrestrial ecosystem functioning and its drivers.” Nature Communications 16, 7725 (2025), accepted 13 August 2025, published 19 August 2025. DOI: 10.1038/s41467-025-63246-z. Published study.

Using carbon-flux information from 57 terrestrial ecosystems, this work analyses temporal complexity in ecosystem functioning and its environmental and functional associations. It demonstrates the group’s quantitative ambition and experience linking large datasets to ecological interpretation. It does not directly study plant rarity or metabolomics. Statistical and causal-diagram modelling should not be presented as experimental causal proof, and the biological sources of complexity remain incompletely resolved. Marcos is first and corresponding author, with coding and analysis roles; other authors contributed study planning, interpretation and code checking. Selected statistical, discussion, data/code and author-contribution sections were read. A 2024 preprint is an earlier version, not another independent original paper.

Together these papers support a credible elemental-ecology and quantitative ecosystem environment. They do not establish that every proposed metabolomic component is already validated, nor do they replace questions about access to specialist training and supervision.

Contract, funding and practical costs

The advertised position is temporary and full time at 37.5 hours per week for at least 48 months. The intended start is January 2027, conditional on the final project resolution and the ability to charge expenditure to the grant. The project identifier is PID 2025-174311NB-I00, funded through MICIU/AEI/10.13039/501100011033 with EU co-funding. The advert gives €25,456.15 gross per year, calculated as 75% of the €33,941.46 state M3 reference for 2024; an increase depends on a newly approved reference. Pay frequency, net salary and individual deductions are not established. Contract and salary notice.

The consolidated EPIF framework normally limits the full-time predoctoral contract to four years, with specified exceptions and evaluation provisions. The advert’s “at least 48 months” therefore needs contractual clarification rather than a promise of open-ended extra employment. Ask about the exact end date, previous predoctoral-contract time, evaluation and lawful extension conditions. The statutory lower salary percentages for earlier years do not replace the advert’s stated 75% each year. EPIF, selected articles 6–9.

Because the doctoral university is unknown, no specific registration fee or fee waiver is assigned. Both the amount and payer need confirmation; an institutional fee schedule would not by itself prove a personal liability. Confirm who pays field travel, extended survey stays, Madrid travel and accommodation, analytical charges, conferences and research computing.

Bellaterra is a campus location rather than central Barcelona. UAB’s 2026 travel guidance describes S2/S6 trains taking around 35 minutes from Plaça Catalunya to Universitat Autònoma; its quoted walk to Building B is not the walk to CREAF’s C5 offices. Door-to-door travel, service times and current fares require individual planning. Campus transport. A July 2025 UAB student handbook gives a historical €800–1,200 monthly planning range, including accommodation and ordinary spending. It is not a January 2027 quote or a basis for guaranteed savings from gross pay. Dated budget reference.

Vila Universitària’s postgraduate FAQ requires relevant university acceptance documentation, specifies deposits and certain contract periods, and does not guarantee availability. eMETA’s university registration and therefore this housing route remain unknown. Seek current housing quotations, upfront costs and a realistic commuting plan. Postgraduate housing conditions.

Eligibility and an effective application

Required by the advert: relevant Bachelor’s and Master’s qualifications in biology, environmental science, forestry, biophysics, physics, chemistry or related fields; botanical skills and fieldwork experience; analytical and problem-solving ability; willingness to develop strong quantitative skills for large datasets and advanced statistics; good written and spoken English; communication, teamwork and independent working. Catalan and Spanish are highly recommended, rather than stated compulsory test-score conditions. Requirements.

Assessed assets: willingness to make multi-day field trips, the driving licence printed as “B2,” R and/or Python expertise, ecology or biology interest and experience, ecology research, publications and biological-experiment experience. First-author publication is strongly valued but is not presented as a universal minimum. The unusual “B2” label should be checked with the employer rather than silently rewritten. Compatible recognised disability of at least 33% receives the stated priority.

Apply through CREAF’s recruitment platform with an English CVA using the supplied template, a motivation letter shorter than one page, Bachelor’s and Master’s transcripts in Spanish or English, and contact details for at least two previous supervisors who can provide references if requested. Shortlisted applicants face an interview and an exercise; its format is not specified. No separate full research proposal is listed. The closing date is 16 November 2026; the official page supplies a date, not a verified cutoff time or timezone. Submit early enough to resolve upload and document problems.

Recommended preparation, rather than extra formal requirements: use the short letter to connect a concrete botanical or field example with a quantitative analysis example; explain how you would separate species, season and environment in inference; identify what training you need without pretending to be an analytical specialist already. Ask previous supervisors before listing their details. For Chinese or other overseas qualifications, obtain the actual doctoral school’s rules on equivalence, access, legalisation and translation after the programme is confirmed. An absence of a nationality restriction in the advert is not a completed immigration or academic eligibility assessment.

Spain’s official research-residence guidance distinguishes contracted research from doctoral study without a contract and describes an employer-filed contract route. CREAF should identify the applicable route and assistance; do not substitute generic student financial thresholds for the employment procedure. Ministry guidance.

Career and Transferable Skills

The transferable combination is field coordination, botanical judgement, ecological data management, quantitative inference, analytical collaboration and scientific writing. It can support further ecological research or applied environmental roles, but no placement rate, industry appointment or salary outcome is documented. The mentor’s separate 2026 eMINING Proof of Concept illustrates translation of elemental research into a nature-based application; it is not an advertised eMETA duty or guaranteed placement. Related translation example.

Questions to Resolve

Before applying, clarify the degree university and programme, required admission stage, foreign-degree documentation, the precise closing clock and “B2” licence meaning. Before accepting, confirm project activation, final start and contract term, salary implementation, fee payer, field/Madrid expenses, supervisory responsibilities and research-permit support. Ask how frequent supervision will be and how specialist analytical training is scheduled.

The recruitment page prints m.fernandez@creaf.uab.catt, which appears inconsistent with the saved institutional staff profile’s recorded m.fernandez@creaf.uab.cat. Preserve the advert as printed and verify the communication channel through the institutional profile or recruitment platform; the two strings must not be silently conflated. The address discrepancy and doctoral registration route should be resolved before relying on informal correspondence or accepting the contract.

Evidence and Sources

Evidence and selected-paper reading are dated 22 October 2026. The saved recruitment, institutional and legal guidance does not establish present availability or a newly verified individual entitlement. Statutory and immigration references retain that dated scope.

Project, Host and Training

• Exact eMETA-RARE recruitment
• STOIKOS institutional project
• CREAF career development
• CREAF 2025 annual report current institutional summary
• CREAF academic training overview
• CREAF 2022 annual report institutional introduction
• UAB 2026 Bellaterra transport guidance
• Marcos Fernández ERC Proof of Concept eMINING
• Marcos Fernández Martínez 2025 research award

Supervisors, Team and Original Studies

• EDM exact 2026 PhD call
• Marcos Fernández Martínez current CREAF profile
• Elemental Diversity and Macroecology group
• Experimental Evidence of High-Dimensional Elementome Shifts Due to Coexistence and Its Effects on Growth Rates
• Optimal set of leaf and aboveground tree elements for predicting forest functioning
• Temporal complexity of terrestrial ecosystem functioning and its drivers

Funding, Eligibility and Living Costs

• CORDIS STOIKOS ERC award
• Consolidated Spanish predoctoral researcher statute EPIF
• Spanish ministry research residence and work authorisation
• UAB international handbook July 2025 local budget
• Vila Universitària postgraduate housing FAQ