Gayantonia Franze

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Telefon: 55238500
Avdeling: Plankton

Curriculum Vitae

I am a Marine Plankton Ecologist. My research interests focus on the role of microbial food webs in the structure and function of marine ecosystems, and their response to climate and human influence. Through a combination of laboratory and fieldwork, I investigated the effects of natural and anthropogenic stressors on microbial physiology, community structure and function, and trophic interactions in several aquatic ecosystems. Due to the central role protists have in in the cycling and transfer of matter and energy, even small changes in their physiological rates and trophic interactions can significantly affect biogeochemical cycles, ecosystem function and biodiversity.
   As a seagoing oceanographer I have participated in and planned numerous expeditions ranging from daily to monthly. I’ve gained experience in managing research projects throughout their lifecycle both in the laboratory and in the field. I designed, planned, and executed experimental procedures to measure microzooplankton physiological rates and their trophic and ecological interactions with prey and predators. I have comprehensive knowledge of laboratory analysis, including traditional light and epifluorescence microscopy, FlowCam, FlowCytometry, chemical extractions, and basic molecular techniques to unravel the complex dynamics characterising microbial food webs. I conducted analysis, elaboration, and interpretation of data to produce report compilation and public delivery in peer-reviewed journals, national and international conferences, and outreach events.

Publikasjoner

Faglige foredrag

2019

Winners and losers in a changing tide: temperature- nutrient impact on phytoplankton community dynamics.

Anderson, S., J. Kling, C. Kremer, G. Franze, D. Hutchins, E. Litchman, S. Menden-Deuer, T. Rynearson
ASLO Aquatic Science Meeting, San Juan, Puerto Rico. (Ja)
2019

Effects of turbulence on microzooplankton growth and grazing.

A. Ward, G. Franze, A. Barton, S. Menden-Deuer
ASLO Aquatic Science Meeting, San Juan, Puerto Rico. (Ja)
2019

The influence of mixed-layer light variability on plankton population dynamics.

F. Morison, G. Franze, E. Harvey, S Menden-Deuer
ASLO Aquatic Science Meeting, San Juan, Puerto Rico. (Ja)
2018

Comparison of the functional response of Acartia tonsa to PUA-producing and non-producing strains of the diatom Skeletonema marinoi.

Stoecker D.K., J.J. Pierson, G.W. Smalley, G. Franze, P.J. Lavrentyev.
Ocean Science Meeting-AGU, Portland, Oregon, USA (Ja)
2018

Direct and indirect effects of temperature and nutrients on plankton community dynamics.

Franze G., S. Anderson, C. Kremer, J. Kling, P. Wilburn, D.A. Hutchins, E. Litchman, T. Rynearson, S. Menden-Deuer.
Ocean Science Meeting-AGU, Portland, Oregon, USA (Ja)
2017

When the going get’s tough: evaluating herbivore behavior and population dynamics under sub-optimal conditions.

Menden-Deuer S., S.R. Anderson, G. Franze, M.K. Kane, N.A. D’souza, F. Morison, A. Oikonomou.
ASLO Aquatic Sciences Meeting, Honolulu, HI. (Ja)
2016

Taxa-specific effects of polyunsaturated aldehydes in micro- and meso-zooplankton alter food web dynamics.

Pierson J.J., P.J. Lavrentyev, D.K. Stoecker, G. Franze, G. Smalley.
ICES/PICES 6th zooplankton production symposium, Bergen, Norway. (Ja)
2012

Carbon flux through the microbial food web in the Barents Sea and the Beaufort Gyre.

Lavrentyev P.J., G. Franze et al.
ICES, Bergen, Norway. (Ja)
2012

Microzooplankton growth and herbivory impact in the Barents Sea

Franze G. and P.J. Lavrentyev.
ICES, Bergen, Norway. (Ja)
2007

Interazioni trofiche e cannibalismo nel microzooplankton

Franze G.
3° Incontro Annuale Dottorandi in Ecologia degli Ecosistemi Acquatici SItE-AIOL. Lecce, Italy. (Ja)
2006

Impatto del microzooplancton sulla composizione del fitoplancton nel Golfo di Napoli

Franze G., I. Santarpia, O. Mangoni, M. Modigh.
XVII Congresso dell’Associazione Italiana di Oceanologia e Limnologia. Napoli, Italy (Ja)

Kapitler og bøker

2010

Microzooplancton

Fonda Umani S., Franze G., Modigh M., Monti M.
Metodologie di studio del plankton marino Chapter 41 (Ja) p. 477-487
2010

Metodo delle diluizioni per la stima della predazione del microzooplancton (e del nanoplancton eterotrofo)

Fonda Umani S., Beran A., Franze G., Modigh M.
Metodologie di studio del plankton marino Chapter 45 (Ja) p. 525-534

Poster

2019

Thermal diversity in a coastal marine synechococcus community selected under low- and high-temperatures.

J. Kling, D. Hutchins T. Rynearson E. Litchman C. Kremer P. Wilburn G. Franze S. Anderson F. Fu M. Phan
ASLO Aquatic Science Meeting, San Juan, Puerto Rico. (Ja)
2017

Temperature dependence of the heterotrophic protists Oxyrrhis marina.

Franze G. and S. Menden-Deuer.
RI NSF EPSCoR 2017 Annual Research Symposium, Providence, RI (Ja)
2016

Microzooplankton abundance, composition and trophic interactions with phytoplankton and pelagic copepods in the ice- covered and open waters of the Eastern Fram Strait.

Lavrentyev P.J., G. Franze, C. Svensen, F.B. Moore
Ocean Science Meeting-AGU, New Orleans, Louisiana USA. (Ja)
2016

he diatom-produced polyunsaturated aldehydes can induce trophic cascades in the planktonic food web in productive coastal waters.

Franze G., J.J. Pierson, D.K. Stoecker, P.J. Lavrentyev. T
Ocean Science Meeting-AGU, New Orleans, Louisiana USA. (Ja)
2015

Specie-Specific effect of diatom- produced cytotoxic secondary metabolites on microzooplankton growth rates.

Franze G., P.J. Lavrentyev, J.J. Pierson, D.K. Stoecker.
ASLO Aquatic Science Meeting, Granada, Spain. (Ja)
2013

Microzooplankton role in the warming Arctic: a cross- system comparison

Lavrentyev P.J., G. Franze et al.
ASLO Aquatic Science Meeting, New Orleans, Louisiana USA. (Ja)
2013

Microzooplankton distribution and trophic interactions with bacteria, phytoplankton, and planktonic copepods in the Beaufort Gyre.

Franze G., P.J. Lavrentyev, R. Conley, J. Putland, K. Young, W. Williams, J. Nelson.
ASLO Aquatic Science Meeting, New Orleans, Louisiana USA. (Ja)
2012

Towards estimating the pan-arctic diversity of eukaryotic microbial plankton.

Frank E., R.J. Duff, P.J. Lavrentyev, G. Franze, F.B. Moore, E.B. Sherr, B.F. Sherr
Ocean Sciences Meeting-AGU, Salt Lake City, Utah USA. (Ja)
2012

Carbon flux through the microbial food web in the Barents Sea.

Lavrentyev P.J., G. Franze et al..
Ocean Sciences Meeting-AGU, Salt Lake City, Utah USA. (Ja)
2012

Microzooplankton growth and herbivory patterns across a temperature gradient in the Barents.

Franze G. and P.J. Lavrentyev.
Ocean Sciences Meeting, Salt Lake City, Utah USA. (Ja)
2011

Microzooplankton trophic interaction with phytoplankton and planktonic copepods in the ice-covered and open waters of the Barents Sea.

Lavrentyev P.J., G. Franze, K. Solovyev.
ASLO Aquatic Science Meeting, San Juan, Puerto Rico. (Ja)
2009

Predation within the microzooplankton: experimental evidence in the Gulf of Naples, Italy

Franze G. and M. Modigh.
ASLO Aquatic Science Meeting, Nice, France. (Ja)
2009

Shifts and persistence in tintinnid assemblages in the Tyrrhenian Sea.

Modigh M. and G. Franze
19th to 21 century records Open Science Conference-Diversitas, Cape Town, South Africa. (Ja)

Populærvitenskapelige artikler

2019

Zooplankton communities associated with new and regenerated primary production in the Atlantic inflow north of Svalbard

Svensen C., E. Halvorsen, M. Vernet, G. Franze, K. Dmoch, P.J. Lavrentyev, S. Kwasniewski
Frontiers in Marine Science (Ja)
2019

Microzooplankton distribution and dynamics in the eastern Fram Strait and the Arctic Ocean in May and August 2014

Lavrentyev P.J, G. Franze, B.G. Moore
Frontiers in Marine Science 6 (Ja) p. 264
2018

Herbivorous protist growth and grazing rates at in situ and artificially elevated temperatures during an Arctic phytoplankton spring bloom

Menden-Deuer S., C. Lawrence, G. Franze
PeerJ 6 (Ja) p. e5264
2018

Diatom-produced allelochemicals trigger trophic cascades in the planktonic food web.

Franze G., J.J. Pierson, D.K. Stoecker, P.J. Lavrentyev,
Limnology and Oceanography 63 (Ja) p. 1093-1108
2017

Microbial food web structure and dynamics across a natural temperature gradient in a productive polar shelf system

Franze G. and P.J. Lavrentyev,
Marine Ecology progress Series 569 (Ja) p. 89-102
2015

https://doi.org/10.3390/md13052834

D’Alelio D., M.G. Mazzocchi, M. Montreso, D. Sarno, A. Zingone, I. Di Capua, G. Franze, M. Margiotta, V. Saggiomo, M. Ribera d´Alcalà
Marine Ecology 36(4) (Ja) p. 1155-1170
2015

The Effect of Dissolved Polyunsaturated Aldehydes on Microzooplankton Growth Rates in the Chesapeake Bay and Atlantic Coastal Water.

Lavrentyev P.J., G. Franze, J.J. Pierson, D.K. Stoecker
Marine Drugs 13 (5) (Ja) p. 2834-2856
2014

Microzooplankton distribution, dynamics, and trophic interactions relative to phytoplankton and quagga mussels in Saginaw Bay, Lake Huron

Lavrentyev P.J., H.A. Vanderploeg, G. Franze, D.H. Chacin, J.R. Liebig, T.H. Johengen
Journal of Great Lakes Reserach 40 (Ja) p. 95-105
2014

Microzooplankton growth rates examined across a temperature gradient in the Barents Sea

Franze G. and P.J. Lavrentyev,
PloSOne 9 (1) (Ja) p. e86429
2013

Experimental evidence for internal predation in microzooplankton communities

Franze G. and M. Modigh
Marine Biology 160 (12) (Ja) p. 3103-3112
2009

Changes in phytoplankton and microzooplankton populations during grazing experiments at a Mediterranean coastal site

Modigh M. and G. Franze
Journal of Plankton Reserach 31 (8) (Ja) p. 853-864
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