Tobia Politi

ORCID: 0000-0001-6894-4284
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About
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Research Areas
  • Marine Biology and Ecology Research
  • Marine and coastal ecosystems
  • Marine Bivalve and Aquaculture Studies
  • Soil and Water Nutrient Dynamics
  • Wastewater Treatment and Nitrogen Removal
  • Environmental DNA in Biodiversity Studies
  • Microbial Community Ecology and Physiology
  • Methane Hydrates and Related Phenomena
  • Coastal wetland ecosystem dynamics
  • Indigenous Studies and Ecology
  • Protist diversity and phylogeny
  • Aquatic Invertebrate Ecology and Behavior
  • Marine and coastal plant biology
  • Microplastics and Plastic Pollution
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Isotope Analysis in Ecology
  • Toxic Organic Pollutants Impact
  • Coastal and Marine Dynamics
  • Arctic and Antarctic ice dynamics
  • Freshwater macroinvertebrate diversity and ecology
  • Fish Ecology and Management Studies
  • Effects and risks of endocrine disrupting chemicals
  • Aquaculture Nutrition and Growth
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Atmospheric and Environmental Gas Dynamics

Klaipėda University
2019-2025

University of Gothenburg
2024-2025

Since the start of synthetic fertilizer production more than a hundred years ago, coastal ocean has been exposed to increasing nutrient loading, which led eutrophication and extensive algal blooms. Such hypereutrophic waters might harbor anaerobic nitrogen (N) cycling processes due low-oxygen microniches associated with abundant organic particles, but studies on nitrate reduction in pelagic environments are scarce. Here, we report 15N isotope-labeling experiments, metagenome, RT-qPCR data...

10.1016/j.watres.2021.116954 article EN cc-by Water Research 2021-02-21

In recent decades, the melting of glaciers has led to a consistent increase in number periglacial coastal lagoons that form place receding Svalbard, European Arctic. There is limited data on geomorphology and hydrology these novel formations, primarily because conducting research remote polar regions logistically challenging expensive. We present hydrological bathymetric collected 2022-2024 newly formed lagoon located western part Spitsbergen (Svalbard), between Eidembreen glacier Eidembukta...

10.1016/j.dib.2025.111304 article EN cc-by Data in Brief 2025-01-14

Abstract We report high‐resolution observations of N 2 O sea‐air fluxes at six fjords spanning arctic, subarctic, and temperate climates. Icelandic Swedish were sources 97.6 ± 10.5 19.9 19.3 μg m −2 day −1 , respectively. These showed increasing concentrations toward the head. In contrast, a Greenland fjord exhibited net uptake −8.3 7.8 with decreasing concentration head fjord. Individual appear to have unique drivers such as temperature, salinity, chlorophyll, pH but no overarching driver...

10.1029/2024gl111624 article EN cc-by Geophysical Research Letters 2025-02-12

Nitrous oxide (N2O) distribution and dynamics in high latitude fjords are relatively unknown. Surface water N2O concentrations were measured six located Sweden, Iceland, Greenland, which represent highly diverse environmental conditions terms of oxygen, eutrophication climate. This study provides one the few spatial resolution observations sea-air fluxes currently available fjords. The two Icelandic showed highest emissions (97.6±10.5 μg m⁻²...

10.5194/egusphere-egu25-11404 preprint EN 2025-03-14

Bivalves are ubiquitous filter-feeders able to alter ecosystems functions. Their impact on nitrogen (N) cycling is commonly related their filter-feeding activity, biodeposition, and excretion. A so far understudied linked the metabolism of associated microbiome that together with host constitute mussel’s holobiont. Here we investigated how colonies invasive zebra mussel ( Dreissena polymorpha ) benthic N in shallow water sediment largest European lagoon (the Curonian Lagoon). set incubations...

10.3389/fmicb.2020.610269 article EN cc-by Frontiers in Microbiology 2021-01-19

The combination of biogeochemical methods and molecular techniques has the potential to uncover black-box nitrogen (N) cycle in bioturbated sediments. Advanced allow quantification process rates different microbial processes, whereas tools analysis diversity (16S rRNA metabarcoding) activity (marker genes transcripts) hot-spots such as burrow wall or macrofauna guts. By combining techniques, we analyzed role tube-dwelling Chironomus plumosus (Insecta, Diptera) larvae on nitrification nitrate...

10.3390/w11091931 article EN Water 2019-09-16

Abstract. Coastal lagoons are important sites for nitrogen (N) removal via sediment burial and denitrification. Blooms of heterocystous cyanobacteria may diminish N retention as dinitrogen (N2) fixation offsets atmospheric losses We measured N2 in the Curonian Lagoon, Europe's largest coastal lagoon, to better understand factors controlling context seasonal changes phytoplankton community composition external inputs. Temporal patterns were primarily determined by abundance cyanobacteria,...

10.5194/bg-18-1857-2021 article EN cc-by Biogeosciences 2021-03-18

Abstract Sediment macrofauna play a vital role in sustaining aquatic food webs and biogeochemical cycles. Previous research demonstrated that bioturbation indirectly affects methane (CH 4 ) dynamics through mobilization of porewater alteration microbial processes the surrounding sediment. However, little is known on direct contribution holobionts (the assemblage invertebrate host associated microbiome) to fluxes. Here, we investigated how 19 taxa holobionts, from different estuarine habitats...

10.1002/lol2.10361 article EN cc-by Limnology and Oceanography Letters 2023-10-07

Abstract Tube‐dwelling chironomid larvae are among the few taxa that can withstand and thrive in organic‐rich sediments typical of eutrophic freshwater ecosystems. They have multiple effects on microbial nitrogen (N) cycling burrow environments, but such cease when undergo metamorphosis into flying adults leave sediment. Here we investigated ecological role Chironomus plumosus by exploring effect its different life stages (as larva adult midge) N transformations a shallow lagoon means...

10.1111/fwb.13696 article EN Freshwater Biology 2021-03-10

Coastal lagoons display a wide range of physico-chemical conditions that shape benthic macrofauna communities. In turn, affects array biogeochemical processes as consequence feeding, bioirrigation, ventilation, and excretion activities. this work, we have measured respiration solute fluxes in intact sediment cores with natural communities collected from four distinct areas within the Sacca di Goro Lagoon (NE Adriatic Sea). The community was characterized at end incubations. Redundancy...

10.3390/w11061186 article EN Water 2019-06-07

Abstract Coastal lagoons are important nutrient filters and carbon sinks but may release large amounts of methane (CH 4 ) to the atmosphere. Here, we hypothesize that eutrophication population density will turn coastal into stronger emitters. We report benthic fluxes from 187 sediment cores incubated three largest European suffering persistent eutrophication. Methane were mainly driven by porosity, organic matter, dissolved inorganic (DIC) fluxes. was always supersaturated (250–49,000%) in...

10.1002/lol2.10430 article EN cc-by Limnology and Oceanography Letters 2024-08-24

In this study, we provide insights into that characteristics of two sites representing different conditions productivity and salinity impact on trophic network structures macrophyte habitats diet benthic grazers at the active vegetation period in Curonian Lagoon (southeastern Baltic Sea). Regarding epiphytic growth, macrophytes were more overgrown relatively less productive (northern) site with a muddy bottom frequent marine water inflow than (southern) higher freshwater sandy habitat....

10.3390/w14101565 article EN Water 2022-05-13

Abstract. Estuarine systems, being situated at the interface between land and marine environments, are important sites for nitrate (NO3–) retention processing due to large inputs, long time, high biogeochemical activity. However, it remains uncertain how pelagic benthic processes control NO3– cycling these differ contrasting seasons. In this study, we measured assimilatory dissimilatory in a lagoon (Curonian Lagoon, SE Baltic Sea) understand changes relation variation riverine inputs shifts...

10.5194/egusphere-2023-3054 preprint EN cc-by 2024-01-22

In situ evaluations of the metabolic rates (i.e., respiration and excretion) salmonid eggs are mostly indirect, focusing on sampling hyporheic water from wild or artificial nests. Comparatively, experimental studies carried out under controlled, laboratory conditions less abundant due to methodological difficulties. This study presents a novel setup aimed address this issue enable measurement oxygen dissolved inorganic nitrogen fluxes in simulated rainbow trout (O. mykiss) egg pockets. The...

10.3390/w16040612 article EN Water 2024-02-19

Estuarine systems, being situated at the interface between land and marine environments, are important sites for nitrate (NO 3 – ) retention processing due to large inputs, long time, high biogeochemical activity. However, it remains uncertain how pelagic benthic processes control NO cycling relative importance of these is affected by seasonal changes in estuarine conditions. We measured suite governing Curonian Lagoon (Southeast Baltic Sea) during two time periods representing spring summer...

10.3389/fmars.2024.1497246 article EN cc-by Frontiers in Marine Science 2024-12-23

Over the last few decades, climate change in Svalbard (European Arctic) has led to emergence and growth of periglacial coastal lagoons place retreating glaciers. In these emerging water bodies, new ecosystems are formed, consisting elements presumably entering lagoon from melting glacier, surrounding tundra bodies ocean. The data presented here were collected an western region Spitsbergen, Svalbard, situated between Eidembreen Glacier Eidembukta Bay 2022-2023. current size area is...

10.1016/j.dib.2024.111260 article EN cc-by-nc Data in Brief 2024-12-28

Abstract. Coastal lagoons are important sites for nitrogen (N) removal via sediment burial and denitrification. Blooms of heterocystous cyanobacteria may diminish N retention as dinitrogen (N2) fixation offsets atmospheric losses We measured N2 in the Curonian Lagoon, Europe's largest coastal lagoon, to better understand factors controlling context seasonal changes phytoplankton community composition external inputs. Temporal patterns were primarily determined by abundance cyanobacteria,...

10.5194/bg-2020-419 preprint EN cc-by 2020-11-13
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