The University of Oldenburg is offering a 36-month, full-time PhD position in Experimental Marine Ecology in Wilhelmshaven, Germany. Funded through the Horizon Europe Marie Skłodowska-Curie Actions Doctoral Network ReDiLEEP, the project focuses on response diversity in marine plankton communities, environmental change, biodiversity, resilience, and ecosystem stability. Applications are due by 30 September 2026.

Åbo Akademi University is recruiting a full-time Doctoral Researcher in Evolutionary Ecology of Arctic Phytoplankton in Turku, Finland. The position is part of a Research Council of Finland-funded project investigating climate-driven dispersal, adaptation, and intraspecific diversity in Arctic marine ecosystems. The appointment runs until 31 August 2030, with a starting salary of approximately €2,700 per month. Application deadline: 30 September 2026 at 15:00 Finnish time.

The University of Gothenburg is offering a fully funded PhD position in Global Change Biology, focusing on climate change, heatwaves, thermal sensitivity, and animal populations. The 100% doctoral position is based at the Department of Biological and Environmental Sciences in Gothenburg, Sweden. Applications are due by 21 September 2026.

The University of Helsinki is offering a 36-month Doctoral Candidate position in plant community ecology through the Marie Skłodowska-Curie Actions Doctoral Network ReDiLEEP. The project will investigate response diversity and the stability of boreal forest and tundra plant communities under environmental change. The position includes international secondments, MSCA network training, and an estimated gross salary of €4,100–€4,600 per month. The application deadline is 18 September 2026.

The University of Helsinki is offering a fully funded Doctoral Researcher position in 3D forest modelling and remote sensing. The PhD project will develop realistic three-dimensional tree and forest models from terrestrial laser scanning data for microwave remote sensing and vegetation optical depth research. The position offers three years of funding, a starting salary of approximately €2,700–€2,900 per month, and international fieldwork opportunities in Kenya and the Amazon region.

The University of Helsinki is offering a Doctoral Researcher position in ecological networks and biodiversity conservation. The PhD project will investigate how plant–seed disperser interactions change under global environmental change and how ecological network knowledge can improve biodiversity conservation. The position is based at the Viikki Campus in Helsinki, Finland, with a starting salary of approximately €2,600 per month and funding for up to 47 months.

The University of Helsinki is offering a fully funded Doctoral Researcher position in butterfly ecology and climate change. The PhD project examines how butterfly body size and wing pigmentation have changed in response to climate warming across Europe, combining fieldwork, museum collections, biodiversity monitoring, image analysis, climate data, and ecological modelling. The position begins in January 2027 and is funded through August 2030.

The University of Copenhagen is offering a three-year PhD fellowship in Medical Entomology focused on surveillance strategies for mosquito-borne infections of human and veterinary importance. The project covers mosquito surveillance, pathogen detection, quantitative epidemiology, time-series analysis, mapping of Culex modestus, and development of a web-based national vector surveillance dashboard. The position starts January 1, 2027, and applications are due by August 30, 2026.

The University of Copenhagen is offering a three-year PhD fellowship in Soil Fertility within the PRIME-P research project, funded by the Novo Nordisk Foundation. The project investigates how biobased fertilizers, soil organic matter, and microbial processes influence phosphorus mobilization and plant phosphorus availability. The position starts January 1, 2027, or as soon as possible thereafter, and applications are due by October 15, 2026.

IRTA in Catalonia, Spain, is offering a four-year PhD position investigating how microplastics affect soil carbon and nitrogen cycling, microbial communities and greenhouse gas emissions in Mediterranean agriculture. The project combines laboratory microcosms, field experiments, LDIR and FTIR spectroscopy, molecular microbiology, greenhouse gas monitoring and life cycle assessment. The position offers a salary of €23,322 gross per year for the first three years and €26,325 in year four, plus up to €7,000 in additional doctoral funding.

Oklahoma State University is offering a funded PhD position in wetland ecology and restoration starting in January 2027. The project will evaluate restored, degraded, and reference backwater sloughs in Nebraska’s Central Platte River Valley using biological and environmental data. The position includes a $30,000 annual stipend, tuition waiver, insurance, field housing, research vehicle, and technician support.

Rutgers University is seeking a PhD student for a field-based research project examining avian community responses to extreme weather events. The project combines climate change ecology, bioacoustics, artificial intelligence, point-count surveys, quantitative analysis, and bird identification. The position starts in September 2027 with a starting salary of $40,000 per year.

Four fully funded PhD opportunities in freshwater ecology are available at the University of Canterbury in New Zealand. The scholarships offer a NZ$32,650 tax-free annual stipend, full university fees, and research expenses. Projects focus on invasive aquatic plants, threatened freshwater fish, spring ecosystems, and braided river birds.

SLU is offering two PhD positions in Biogas Process Development and Microbiology in Uppsala, Sweden. The projects focus on anaerobic digestion, agricultural feedstocks, process optimisation, microbial communities, bioinformatics, and renewable energy. The positions are four-year, full-time doctoral studentships with an application deadline of 31 August 2026.

The Swedish University of Agricultural Sciences (SLU) is offering a four-year PhD position in Biology focused on characterizing boreal soil proteins and understanding their role in soil nitrogen turnover. Based in Umeå, the project combines soil science, plant physiology, proteomics, laboratory analysis, and statistical methods. The application deadline is 20 August 2026.