Solange Duhamel
- Associate Professor, Molecular and Cellular Biology
- Associate Professor, BIO5 Institute
- Associate Professor, Lunar and Planetary Laboratory
- Associate Professor, Planetary Sciences
- Member of the Graduate Faculty
Contact
- (520) 621-6057
- Life Sciences South, Rm. 354
- Tucson, AZ 85721
- duhamel@arizona.edu
Degrees
- Ph.D. Marine Environmental Science
- University of Aix-Marseille II, France
- M.S. Biological Oceanography and Marine Environmental Ecology
- University Pierre & Marie Curie, Paris VI, Paris, France
- B.S. Organisms Biology
- University Pierre & Marie Curie, Paris VI, Paris, France
Work Experience
- Columbia University (2017 - 2020)
- Columbia University (2012 - 2016)
- Woods Hole Oceanographic Institution (2011 - 2012)
- University of Hawaii (2008 - 2011)
Awards
- Scialog Fellow
- Co-sponsored by RCSA and the Heising-Simons Foundation and with additional program support from the Kavli Foundation., Spring 2020
Interests
No activities entered.
Courses
2024-25 Courses
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Life in Extreme Environments
MCB 437 (Spring 2025) -
Life in Extreme Environments
MCB 537 (Spring 2025) -
Life in the Universe
MCB 295G (Spring 2025) -
Dissertation
MCB 920 (Fall 2024) -
Dissertation
PTYS 920 (Fall 2024) -
Honors Thesis
MCB 498H (Fall 2024)
2023-24 Courses
-
Directed Research
ABBS 792 (Spring 2024) -
Dissertation
MCB 920 (Spring 2024) -
Dissertation
PTYS 920 (Spring 2024) -
Lab Presentations & Discussion
MCB 696A (Spring 2024) -
Life in Extreme Environments
MCB 437 (Spring 2024) -
Life in Extreme Environments
MCB 537 (Spring 2024) -
Life in the Universe
MCB 295G (Spring 2024) -
Research
MCB 900 (Spring 2024) -
Thesis
MCB 910 (Spring 2024) -
Dissertation
MCB 920 (Fall 2023) -
Dissertation
PTYS 920 (Fall 2023) -
Honors Thesis
MCB 498H (Fall 2023) -
Thesis
MCB 910 (Fall 2023)
2022-23 Courses
-
Dissertation
MCB 920 (Summer I 2023) -
Dissertation
PTYS 920 (Summer I 2023) -
Dissertation
MCB 920 (Spring 2023) -
Honors Thesis
MCB 498H (Spring 2023) -
Lab Present & Discuss
MCB 596A (Spring 2023) -
Lab Presentations & Discussion
MCB 696A (Spring 2023) -
Life in Extreme Environments
MCB 437 (Spring 2023) -
Life in Extreme Environments
MCB 537 (Spring 2023) -
Research
PTYS 900 (Spring 2023) -
Rsrch Ecology+Evolution
ECOL 610A (Spring 2023) -
Dissertation
MCB 920 (Fall 2022) -
Honors Independent Study
MCB 399H (Fall 2022) -
Lab Presentations & Discussion
MCB 696A (Fall 2022) -
MCB Journal Club
MCB 595 (Fall 2022) -
Research
PTYS 900 (Fall 2022)
2021-22 Courses
-
Directed Research
MCB 792 (Spring 2022) -
Lab Presentations & Discussion
MCB 696A (Spring 2022) -
Life in Extreme Environments
MCB 437 (Spring 2022) -
Life in Extreme Environments
MCB 537 (Spring 2022) -
Life in the Universe
MCB 295G (Spring 2022) -
Research
MCB 900 (Spring 2022) -
Research
PTYS 900 (Spring 2022) -
Lab Presentations & Discussion
MCB 696A (Fall 2021) -
Research
MCB 900 (Fall 2021) -
Research
PTYS 900 (Fall 2021)
2020-21 Courses
-
Lab Presentations & Discussion
MCB 696A (Spring 2021) -
Research
MCB 900 (Spring 2021) -
Lab Presentations & Discussion
MCB 696A (Fall 2020) -
Life in Extreme Environments
MCB 437 (Fall 2020) -
Life in Extreme Environments
MCB 537 (Fall 2020) -
Life in the Universe
MCB 295G (Fall 2020) -
Research
MCB 900 (Fall 2020)
2019-20 Courses
-
Directed Research
MCB 792 (Spring 2020) -
Introductory Biology I
MCB 181R (Fall 2019)
Scholarly Contributions
Journals/Publications
- Adams, J. C., Steffen, R., Chou, C. W., Duhamel, S., & Diaz, J. M. (2022). Dissolved organic phosphorus utilization by the marine bacterium Ruegeria pomeroyi DSS-3 reveals chain length-dependent polyphosphate degradation. Environmental microbiology.More infoDissolved organic phosphorus (DOP) is a critical nutritional resource for marine microbial communities. However, the relative bioavailability of different types of DOP, such as phosphomonoesters (P-O-C) and phosphoanhydrides (P-O-P), is poorly understood. Here we assess the utilization of these P sources by a representative bacterial copiotroph, Ruegeria pomeroyi DSS-3. All DOP sources supported equivalent growth by R. pomeroyi, and all DOP hydrolysis rates were upregulated under phosphorus depletion (-P). A long-chain polyphosphate (45polyP) showed the lowest hydrolysis rate of all DOP substrates tested, including tripolyphosphate (3polyP). Yet the upregulation of 45polyP hydrolysis under -P was greater than any other substrate analyzed. Proteomics revealed three common P acquisition enzymes potentially involved in polyphosphate utilization, including two alkaline phosphatases, PhoD and PhoX, and one 5'-nucleotidase (5'-NT). Results from DOP substrate competition experiments show that these enzymes likely have broad substrate specificities, including chain length-dependent reactivity toward polyphosphate. These results confirm that DOP, including polyP, are bioavailable nutritional P sources for R. pomeroyi, and possibly other marine heterotrophic bacteria. Furthermore, the chain-length dependent mechanisms, rates and regulation of polyP hydrolysis suggest that these processes may influence the composition of DOP and the overall recycling of nutrients within marine dissolved organic matter.
- Benavides, M., Caffin, M., Duhamel, S., Foster, R. A., Grosso, O., Guieu, C., Van Wambeke, F., & Bonnet, S. (2022). Anomalously high abundance of Crocosphaera in the South Pacific Gyre. FEMS microbiology letters, 369(1).More infoThe unicellular diazotrophic cyanobacterium Crocosphaera contributes significantly to fixed nitrogen inputs in the oligotrophic ocean. In the western tropical South Pacific Ocean (WTSP), these diazotrophs abound thanks to the phosphorus-rich waters provided by the South Equatorial Current, and iron provided aeolian and subsurface volcanic activity. East of the WTSP, the South Pacific Gyre (SPG) harbors the most oligotrophic and transparent waters of the world's oceans, where only heterotrophic diazotrophs have been reported before. Here, in the SPG, we detected unexpected accumulation of Crocosphaera at 50 m with peak abundances of 5.26 × 105 nifH gene copies l-1. The abundance of Crocosphaera at 50 m was in the same order of magnitude as those detected westwards in the WTSP and represented 100% of volumetric N2 fixation rates. This accumulation at 50 m was likely due to a deeper penetration of UV light in the clear waters of the SPG being detrimental for Crocosphaera growth and N2 fixation activity. Nutrient and trace metal addition experiments did not induce any significant changes in N2 fixation or Crocosphaera abundance, indicating that this population was not limited by the resources tested and could develop in high numbers despite the oligotrophic conditions. Our findings indicate that the distribution of Crocosphaera can extend into subtropical gyres and further understanding of their controlling factors is needed.
- Bock, N., Cornec, M., Claustre, H., & Duhamel, S. (2022). Biogeographical Classification of the Global Ocean From BGC-Argo Floats. Global biogeochemical cycles, 36(6), e2021GB007233.More infoBiogeographical classifications of the global ocean generalize spatiotemporal trends in species or biomass distributions across discrete ocean biomes or provinces. These classifications are generally based on a combination of remote-sensed proxies of phytoplankton biomass and global climatologies of biogeochemical or physical parameters. However, these approaches are limited in their capacity to account for subsurface variability in these parameters. The deployment of autonomous profiling floats in the Biogeochemical Argo network over the last decade has greatly increased global coverage of subsurface measurements of bio-optical proxies for phytoplankton biomass and physiology. In this study, we used empirical orthogonal function analysis to identify the main components of variability in a global data set of 422 annual time series of Chlorophyll fluorescence and optical backscatter profiles. Applying cluster analysis to these results, we identified six biomes within the global ocean: two high-latitude biomes capturing summer bloom dynamics in the North Atlantic and Southern Ocean and four mid- and low-latitude biomes characterized by variability in the depth and frequency of deep chlorophyll maximum formation. We report the distribution of these biomes along with associated trends in biogeochemical and physicochemical environmental parameters. Our results demonstrate light and nutrients to explain most variability in phytoplankton distributions for all biomes, while highlighting a global inverse relationship between particle stocks in the euphotic zone and transfer efficiency into the mesopelagic zone. In addition to partitioning seasonal variability in vertical phytoplankton distributions at the global scale, our results provide a potentially novel biogeographical classification of the global ocean.
- Duhamel, S., Hamilton, C. W., Pálsson, S., & Björnsdóttir, S. H. (2022). Microbial Response to Increased Temperatures Within a Lava-Induced Hydrothermal System in Iceland: An Analogue for the Habitability of Volcanic Terrains on Mars. Astrobiology, 22(10), 1176-1198.More infoFossil hydrothermal systems on Mars are important exploration targets because they may have once been habitable and could still preserve evidence of microbial life. We investigated microbial communities within an active lava-induced hydrothermal system associated with the 2014-2015 eruption of Holuhraun in Iceland as a Mars analogue. In 2016, the microbial composition in the lava-heated water differed substantially from that of the glacial river and spring water sources that fed into the system. Several taxonomic and metabolic groups were confined to the water emerging from the lava and some showed the highest sequence similarities to subsurface ecosystems, including to the predicted thermophilic and deeply branching Candidatus . Measurements show that the communities were affected by temperature and other environmental factors. In particular, comparing glacial river water incubated (5.7°C, control) with glacial water incubated within a lava-heated stream (17.5°C, warm) showed that microbial abundance, richness, and diversity increased in the warm treatment compared with the control, with the predicted major metabolism shifting from lithotrophy toward organotrophy and possibly phototrophy. In addition, thermophilic bacteria isolated from the lava-heated water and a nearby acidic hydrothermal system included the known endospore-formers and as well as a potentially novel taxon within the order Hyphomicrobiales. Similar lava-water interactions on Mars could therefore have generated habitable environments for microbial communities.
- Filella, A., Riemann, L., Van, W. F., Pulido-Villena, E., Vogts, A., Bonnet, S., Grosso, O., Diaz, J. M., Duhamel, S., & Benavides, M. (2022). Contrasting Roles of DOP as a Source of Phosphorus and Energy for Marine Diazotrophs. Frontiers in Marine Science, 9.
- Muñoz-Marín, M. D., Duhamel, S., Björkman, K. M., Magasin, J. D., Díez, J., Karl, D. M., & García-Fernández, J. M. (2022). Differential Timing for Glucose Assimilation in and Coexistent Microbial Populations in the North Pacific Subtropical Gyre. Microbiology spectrum, 10(5), e0246622.More infoThe marine cyanobacterium can utilize glucose as a source of carbon. However, the relative importance of inorganic and organic carbon assimilation and the timing of glucose assimilation are still poorly understood in these numerically dominant cyanobacteria. Here, we investigated whole microbial community and group-specific primary production and glucose assimilation using incubations with radioisotopes combined with flow cytometry cell sorting. We also studied changes in the microbial community structure in response to glucose enrichments and analyzed the transcription of genes involved in carbon metabolism and photosynthesis. Our results showed a diel variation for glucose assimilation in , with maximum assimilation at midday and minimum at midnight (~2-fold change), which was different from that of the total microbial community. This suggests that the timing in glucose assimilation in is coupled to photosynthetic light reactions producing energy, it being more convenient for to show maximum glucose uptake precisely when the rest of microbial populations have their minimum glucose uptake. Many transcriptional responses to glucose enrichment occurred after 12- and 24-h periods, but community composition did not change. High-light strains were the most impacted by glucose addition, with transcript-level increases observed for genes in pathways for glucose metabolism, such as the pentose phosphate pathway, the Entner-Doudoroff pathway, glycolysis, respiration, and glucose transport. While C assimilation from glucose represented less than 0.1% of the bacterium's photosynthetic C fixation, increased assimilation during the day and gene upregulation upon glucose enrichment indicate an important role of mixotrophic C assimilation by natural populations of Several studies have demonstrated that , the most abundant photosynthetic organism on Earth, can assimilate organic molecules, such as amino acids, amino sugars, ATP, phosphonates, and dimethylsulfoniopropionate. This autotroph can also assimilate small amounts of glucose, supporting the hypothesis that is mixotrophic. Our results show, for the first time, a diel variability in glucose assimilation by natural populations of with maximum assimilation during midday. Based on our previous results, this indicates that could maximize glucose uptake by using ATP made during the light reactions of photosynthesis. Furthermore, showed a different timing of glucose assimilation from the total population, which may offer considerable fitness advantages over competitors "temporal niches." Finally, we observed transcriptional changes in some of the genes involved in carbon metabolism, suggesting that can use both pathways previously proposed in cyanobacteria to metabolize glucose.
- Rabouille, S., Tournier, L., Duhamel, S., Claquin, P., Crispi, O., Talec, A., Landolfi, A., & Oschlies, A. (2022). Organic Phosphorus Scavenging Supports Efficient Growth of Diazotrophic Cyanobacteria Under Phosphate Depletion. Frontiers in Microbiology, 13.
- Yang, H., Genot, B., Duhamel, S., Kerney, R., & Burns, J. A. (2022). Organismal and cellular interactions in vertebrate-alga symbioses. Biochemical Society transactions, 50(1), 609-620.More infoPhotosymbioses, intimate interactions between photosynthetic algal symbionts and heterotrophic hosts, are well known in invertebrate and protist systems. Vertebrate animals are an exception where photosynthetic microorganisms are not often considered part of the normal vertebrate microbiome, with a few exceptions in amphibian eggs. Here, we review the breadth of vertebrate diversity and explore where algae have taken hold in vertebrate fur, on vertebrate surfaces, in vertebrate tissues, and within vertebrate cells. We find that algae have myriad partnerships with vertebrate animals, from fishes to mammals, and that those symbioses range from apparent mutualisms to commensalisms to parasitisms. The exception in vertebrates, compared with other groups of eukaryotes, is that intracellular mutualisms and commensalisms with algae or other microbes are notably rare. We currently have no clear cell-in-cell (endosymbiotic) examples of a trophic mutualism in any vertebrate, while there is a broad diversity of such interactions in invertebrate animals and protists. This functional divergence in vertebrate symbioses may be related to vertebrate physiology or a byproduct of our adaptive immune system. Overall, we see that diverse algae are part of the vertebrate microbiome, broadly, with numerous symbiotic interactions occurring across all vertebrate and many algal clades. These interactions are being studied for their ecological, organismal, and cellular implications. This synthesis of vertebrate-algal associations may prove useful for the development of novel therapeutics: pairing algae with medical devices, tissue cultures, and artificial ecto- and endosymbioses.
- Charvet, S., Kim, E., Subramaniam, A., Montoya, J., & Duhamel, S. (2021). Small pigmented eukaryote assemblages of the western tropical North Atlantic around the Amazon River plume during spring discharge. Scientific reports, 11(1), 16200.More infoSmall pigmented eukaryotes (⩽ 5 µm) are an important, but overlooked component of global marine phytoplankton. The Amazon River plume delivers nutrients into the oligotrophic western tropical North Atlantic, shades the deeper waters, and drives the structure of microphytoplankton (> 20 µm) communities. For small pigmented eukaryotes, however, diversity and distribution in the region remain unknown, despite their significant contribution to open ocean primary production and other biogeochemical processes. To investigate how habitats created by the Amazon river plume shape small pigmented eukaryote communities, we used high-throughput sequencing of the 18S ribosomal RNA genes from up to five distinct small pigmented eukaryote cell populations, identified and sorted by flow cytometry. Small pigmented eukaryotes dominated small phytoplankton biomass across all habitat types, but the population abundances varied among stations resulting in a random distribution. Small pigmented eukaryote communities were consistently dominated by Chloropicophyceae (0.8-2 µm) and Bacillariophyceae (0.8-3.5 µm), accompanied by MOCH-5 at the surface or by Dinophyceae at the chlorophyll maximum. Taxonomic composition only displayed differences in the old plume core and at one of the plume margin stations. Such results reflect the dynamic interactions of the plume and offshore oceanic waters and suggest that the resident small pigmented eukaryote diversity was not strongly affected by habitat types at this time of the year.
- Duhamel, S. (2021). Experimental identification and in silico prediction of bacterivory in green algae. The ISME Journal.
- Duhamel, S. (2021). Inorganic and organic carbon and nitrogen uptake strategies of picoplankton groups in the northwestern Atlantic Ocean. Limnology and Oceanography.
- Duhamel, S. (2021). Phosphorus as an integral component of global marine biogeochemistry. Nature Geoscience.
- Duhamel, S., & Hamilton, C. W. (2021). How microbes in Iceland can teach us about possible life on Mars?. Futurum Careers, 7, 22 – 25. doi:10.33424/FUTURUM112
- Burns, J. A., Kerney, R., & Duhamel, S. (2020). Heterotrophic Carbon Fixation in a Salamander-Alga Symbiosis. Frontiers in Microbiology, 11, 1815.
- Duhamel, S. (2020). Dissolved organic matter stimulates N2 fixation and nifH gene expression in Trichodesmium. FEMS Microbiology Letters.More infoABSTRACT Mixotrophy, the combination of heterotrophic and autotrophic nutrition modes, is emerging as the rule rather than the exception in marine photosynthetic plankton. Trichodesmium, a prominent diazotroph ubiquitous in the (sub)tropical oceans, is generally considered to obtain energy via autotrophy. While the ability of Trichodesmium to use dissolved organic phosphorus when deprived of inorganic phosphorus sources is well known, the extent to which this important cyanobacterium may benefit from other dissolved organic matter (DOM) sources is unknown. Here we provide evidence of carbon-, nitrogen- and phosphorus-rich DOM molecules enhancing N2 fixation rates and nifH gene expression in natural Trichodesmium colonies collected at two stations in the western tropical South Pacific. Sampling at a third station located in the oligotrophic South Pacific Gyre revealed no Trichodesmium but showed presence of UCYN-B, although no nifH expression was detected. Our results suggest that Trichodesmium may behave mixotrophically in response to certain environmental conditions, providing them with metabolic plasticity and adding up to the view that mixotrophy is widespread among marine microbes.
- Berthelot, H., Duhamel, S., L'Helguen, S., Maguer, J. F., Wang, S., Cetinić, I., & Cassar, N. (2019). NanoSIMS single cell analyses reveal the contrasting nitrogen sources for small phytoplankton. The ISME journal, 13(3), 651-662.More infoNitrogen (N) is a limiting nutrient in vast regions of the world's oceans, yet the sources of N available to various phytoplankton groups remain poorly understood. In this study, we investigated inorganic carbon (C) fixation rates and nitrate (NO), ammonium (NH) and urea uptake rates at the single cell level in photosynthetic pico-eukaryotes (PPE) and the cyanobacteria Prochlorococcus and Synechococcus. To that end, we used dual N and C-labeled incubation assays coupled to flow cytometry cell sorting and nanoSIMS analysis on samples collected in the North Pacific Subtropical Gyre (NPSG) and in the California Current System (CCS). Based on these analyses, we found that photosynthetic growth rates (based on C fixation) of PPE were higher in the CCS than in the NSPG, while the opposite was observed for Prochlorococcus. Reduced forms of N (NH and urea) accounted for the majority of N acquisition for all the groups studied. NO represented a reduced fraction of total N uptake in all groups but was higher in PPE (17.4 ± 11.2% on average) than in Prochlorococcus and Synechococcus (4.5 ± 6.5 and 2.9 ± 2.1% on average, respectively). This may in part explain the contrasting biogeography of these picoplankton groups. Moreover, single cell analyses reveal that cell-to-cell heterogeneity within picoplankton groups was significantly greater for NO uptake than for C fixation and NH uptake. We hypothesize that cellular heterogeneity in NO uptake within groups facilitates adaptation to the fluctuating availability of NO in the environment.
- Bonnefoy, L. E., Hamilton, C. W., Scheidt, S. P., Duhamel, S., Hoskuldsson, A., Jonsdottir, I., Thordarson, T., & Muenzer, U. (2019). Landscape evolution associated with the 2014-2015 Holuhraun eruption in Iceland. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 387.
- Diaz, J. M., Steffen, R., Sanders, J. G., Tang, Y., & Duhamel, S. (2019). Preferential utilization of inorganic polyphosphate over other bioavailable phosphorus sources by the model diatoms Thalassiosira spp. Environmental microbiology, 21(7), 2415-2425.More infoPolyphosphates and phosphomonoesters are dominant components of marine dissolved organic phosphorus (DOP). Collectively, DOP represents an important nutritional phosphorus (P) source for phytoplankton growth in the ocean, but the contribution of specific DOP sources to microbial community P demand is not fully understood. In a prior study, it was reported that inorganic polyphosphate was not bioavailable to the model diatoms Thalassiosira weissflogii and Thalassiosira pseudonana. However, in this study, we show that the previous finding was a misinterpretation based on a technical artefact of media preparation and that inorganic polyphosphate is actually widely bioavailable to Thalassiosira spp. In fact, orthophosphate, inorganic tripolyphosphate (3polyP), adenosine triphosphate (ATP) and adenosine monophosphate supported equivalent growth rates and final growth yields within each of four strains of Thalassiosira spp. However, enzyme activity assays revealed in all cultures that cell-associated hydrolysis rates of 3polyP were typically more than ~10-fold higher than degradation of ATP and the model phosphomonoester compound 4-methylumbelliferyl phosphate. These results build on prior work, which showed the preferential utilization of polyphosphates in the cell-free exudates of Thalassiosira spp., and suggest that inorganic polyphosphates may be a key bioavailable source of P for marine phytoplankton.
- Duhamel, S. (2019). Copepods promote bacterial community changes in surrounding seawater through farming and nutrient enrichment. Environmental Microbiology.
- Duhamel, S. (2019). Landscape evolution associated with the 2014–2015 Holuhraun eruption in Iceland. Journal of Volcanology and Geothermal Research.
- Duhamel, S. (2019). NanoSIMS single cell analyses reveal the contrasting nitrogen sources for small phytoplankton. The ISME Journal.
- Duhamel, S. (2019). Preferential utilization of inorganic polyphosphate over other bioavailable phosphorus sources by the model diatoms Thalassiosira spp.. Environmental Microbiology.
- Duhamel, S. (2019). Small pigmented eukaryotes play a major role in carbon cycling in the P‐depleted western subtropical North Atlantic, which may be supported by mixotrophy. Limnology and Oceanography.
- Duhamel, S., Kim, E., Sprung, B., & Anderson, O. R. (2019). Small pigmented eukaryotes play a major role in carbon cycling in the P-depleted western subtropical North Atlantic, which may be supported by mixotrophy. LIMNOLOGY AND OCEANOGRAPHY, 64(6), 2424-2440.
- Shoemaker, K. M., Duhamel, S., & Moisander, P. H. (2019). Copepods promote bacterial community changes in surrounding seawater through farming and nutrient enrichment. Environmental microbiology, 21(10), 3737-3750.More infoBacteria living in the oligotrophic open ocean have various ways to survive under the pressure of nutrient limitation. Copepods, an abundant portion of the mesozooplankton, release nutrients through excretion and sloppy feeding that can support growth of surrounding bacteria. We conducted incubation experiments in the North Atlantic Subtropical Gyre to investigate the response of bacterial communities in the presence of copepods. Bacterial community composition and abundance measurements indicate that copepods have the potential to influence the microbial communities surrounding and associating with them - their 'zoosphere', in two ways. First, copepods may attract and support the growth of copiotrophic bacteria including representatives of Vibrionaceae, Oceanospirillales and Rhodobacteraceae in waters surrounding them. Second, copepods appear to grow specific groups of bacteria in or on the copepod body, particularly Flavobacteriaceae and Pseudoalteromonadaceae, effectively 'farming' them and subsequently releasing them. These distinct mechanisms provide a new view into how copepods may shape microbial communities in the open ocean. Microbial processes in the copepod zoosphere may influence estimates of oceanic bacterial biomass and in part control bacterial community composition and distribution in seawater.
- Duhamel, S. (2018). Diazotrophic Trichodesmium impact on UV–Vis radiance and pigment composition in the western tropical South Pacific. Biogeosciences.
- Duhamel, S. (2018). Dissolved Organic Phosphorus Utilization by Phytoplankton Reveals Preferential Degradation of Polyphosphates Over Phosphomonoesters. Frontiers in Marine Science.
- Duhamel, S. (2018). Dynamics and controls of heterotrophic prokaryotic production in the western tropical South Pacific Ocean: links with diazotrophic and photosynthetic activity. Biogeosciences.
- Duhamel, S. (2018). Large- to submesoscale surface circulation and its implications on biogeochemical/biological horizontal distributions during the OUTPACE cruise (southwest Pacific). Biogeosciences.
- Duhamel, S. (2018). Microbial community structure in the western tropical South Pacific. Biogeosciences.
- Duhamel, S. (2018). Mixotrophic metabolism by natural communities of unicellular cyanobacteria in the western tropical South Pacific Ocean. Environmental Microbiology.
- Duhamel, S. (2018). Spatial and Temporal Dynamics of Inorganic Phosphate and Adenosine-5′-Triphosphate in the North Pacific Ocean. Frontiers in Marine Science.
- Duhamel, S. (2017). Dissolved organic matter uptake by Trichodesmium in the Southwest Pacific. Scientific Reports.
- Duhamel, S. (2017). Effects of water level fluctuation and sediment–water nutrient exchange on phosphorus biogeochemistry in two coastal wetlands. Aquatic Sciences.
- Duhamel, S. (2017). Phosphorus dynamics in biogeochemically distinct regions of the southeast subtropical Pacific Ocean. Progress in Oceanography.
- Duhamel, S. (2016). Diversity and productivity of photosynthetic picoeukaryotes in biogeochemically distinct regions of the South East Pacific Ocean. Limnology and Oceanography.
- Duhamel, S. (2016). Oligotrophic lagoons of the South Pacific Ocean are home to a surprising number of novel eukaryotic microorganisms. Environmental Microbiology.
- Duhamel, S. (2015). Variable phosphorus uptake rates and allocation across microbial groups in the oligotrophic Gulf of Mexico..
- Duhamel, S. (2014). Distinct dissolved organic matter sources induce rapid transcriptional responses in coexisting populations of Prochlorococcus, Pelagibacter and the OM60 clade. Environmental Microbiology.
- Duhamel, S. (2014). Microbial response to enhanced phosphorus cycling in the North Pacific Subtropical Gyre. Marine Ecology Progress Series.
- Duhamel, S. (2012). Does eddy-eddy interaction control surface phytoplankton distribution and carbon export in the North Pacific Subtropical Gyre?. Journal of Geophysical Research: Biogeosciences.
- Duhamel, S. (2012). Light dependence of phosphorus uptake by microorganisms in the Subtropical North and South Pacific Ocean. Aquatic Microbial Ecology.
- Duhamel, S. (2012). Microbial group specific uptake kinetics of inorganic phosphate and adenosine-5'-triphosphate (ATP) in the north pacific subtropical gyre..
- Duhamel, S. (2011). Characterization of alkaline phosphatase activity in the north and south pacific subtropical gyres: Implications for phosphorus cycling. Limnology and Oceanography.
- Duhamel, S. (2011). Improved methodology to measure taxon-specific phosphate uptake in live and unfiltered samples. Limnology and Oceanography: Methods.
- Duhamel, S. (2010). Alkaline phosphatase activity and regulation in the North Pacific Subtropical Gyre. Limnology and Oceanography.
- Duhamel, S. (2009). Carbon and phosphate incorporation rates of microbial assemblages in contrasting environments in the Southeast Pacific. Marine Ecology Progress Series.
- Duhamel, S. (2009). Detection of extracellular phosphatase activity at the single-cell level by enzyme-labeled fluorescence and flow cytometry: The importance of time kinetics in ELFA labeling. Cytometry Part A.
- Duhamel, S. (2009). Detection of extracellular phosphatase activity of heterotrophic prokaryotes at the single-cell level by flow cytometry. Current Protocols in Cytometry.
- Duhamel, S. (2009). Diel variability of heterotrophic bacterial production and underwater UV doses in the eastern South Pacific. Marine Ecology Progress Series.
- Duhamel, S. (2008). A method for analysing phosphatase activity in aquatic bacteria at the single cell level using flow cytometry. Journal of Microbiological Methods.
- Duhamel, S. (2008). Alkaline phosphatase activity of marine bacteria studied with ELF 97 substrate: Success and limits in the P-limited Mediterranean Sea. Aquatic Microbial Ecology.
- Duhamel, S. (2008). Heterotrophic bacterial production in the eastern South Pacific: Longitudinal trends and coupling with primary production. Biogeosciences.
- Duhamel, S. (2008). Phosphate availability and the ultimate control of new nitrogen input by nitrogen fixation in the tropical Pacific Ocean. Biogeosciences.
- Duhamel, S. (2008). Phospholipid synthesis rates in the eastern subtropical South Pacific Ocean. Biogeosciences.
- Duhamel, S. (2007). Affinity of extracellular phosphatases for ELF97 phosphate in aquatic environments. Marine and Freshwater Research.
- Duhamel, S. (2007). Growth and specific P-uptake rates of bacterial and phytoplanktonic communities in the Southeast Pacific (BIOSOPE cruise). Biogeosciences.
- Duhamel, S. (2006). A dual-labeling method for the simultaneous measurement of dissolved inorganic carbon and phosphate uptake by marine planktonic species. Limnology and Oceanography: Methods.
- Duhamel, S. (2006). Assessing the microbial community dynamics and the role of bacteriophages in bacterial mortality in Lake Geneva. Revue des Sciences de l'Eau.
- Duhamel, S. (2006). Flow cytometric analysis of bacteria- and virus-like particles in lake sediments. Journal of Microbiological Methods.
- Duhamel, S. (2006). Les virus planctoniques : un compartiment biologique clef des milieux aquatiques. Le Courrier de l'Environnement de l'INRA.
- Duhamel, S. (2005). Estimates of protozoan- and viral-mediated mortality of bacterioplankton in Lake Bourget (France). Freshwater Biology.
- Duhamel, S. (2005). Importance des virus en milieu lacustre. INRA Mensuel.
Poster Presentations
- Waggoner, E., Frost, C., & Duhamel, S. (2022, September). Organophosphate Esters alon the Amazon River Plume and into the North Atlantic Ocean. BioRetreat 2022. Biosphere 2: University of Arizona.
Others
- Duhamel, S. (2018, January). Aphotic N2 fixation along an oligotrophic to ultraoligotrophic transect in the Western Tropical South Pacific Ocean. https://doi.org/10.5194/bg-2017-542