Ecosystem

Axelle Gherissi

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Discover what my ecosystem has to offer ...

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About me ...

Science has always been the obvious choice as I'm constantly looking for answers to better my comprehension of the world I live in.

Born in Lyon (France) in 2002, I have recently graduated with a Master's degree in Marine Sciences from the University of Toulon. I specialize in marine biology, and my studies focus primarily on environmental DNA, microbiology, and the effects of anthropogenic disturbances on the environment. My training was multidisciplinary, combining biology, chemistry, and physics, and I have developed strong skills in laboratory work as well as in bioinformatics and data processing (Python, R).

Mission surveillance de nids de tortues Caouanes - Saint Cyr sur mer 2023

Mâchoires de Sorex coronatus (Musaraigne couronnée) - Lyon 1 university 2023

Triton alpestre - Lyon 1 University 2023

Nanipora (Octorcorallia) eDNA detection in Okinawa

Axelle Gherissi - Supervisor : James Davis Reimer - Ryukyus University (Okinawa)

Traditional visual surveys are ineffective for tracking Nanipora, a rare and highly resilient octocoral. In this study, eDNA metabardocing is used to map its distribution in Okinawa, but direct molecular detection is only successful in pristine environments. To overcome detection limits, a predictive model based on the surrounding coral community is developed.

Read the paper in English

PHYOCE mission

BERTHELET F., FERRE G., GHERISSI A., HUTIÉ C., KHADHAR A., LOISEAU M., PAPA V., SEIBEL R.

The mission focused on studying Toulon Bay, a Mediterranean coastal area divided into small and large bays and strongly influenced by human activities and regional oceanic dynamics. We investigated how river inputs, currents, and winds affected water circulation and biogeochemical processes. The study also examined the impact of trace metal contamination from industrial and dredging activities on sediments, the water column, and planktonic communities. Overall, the mission aimed to understand the interactions between physical, chemical, and biological parameters along coastal-offshore and intra-coastal gradients to gain insights into the functioning of this complex ecosystem.

Read the paper in French

The Planktoscope

Gherissi Axelle

As part of my first-year master’s internship at the Mediterranean Institute of Oceanography, I participated in the setup and commissioning of the PlanktoScope, a revolutionary new low-cost automated microscope, for plankton monitoring in Toulon Bay. This work highlighted its potential for high-frequency observation of coastal plankton communities, revealing diatom-dominated phytoplankton and copepod-rich zooplankton.

Read the paper in French

What is an Ecoguide ?

Gherissi Axelle

Sponsored by the national parc of Port-Cros, this optional course is meant for us to learn about scientific mediation and animation, as well as acquiring naturalist, geologic and historic knowledge about PACA region...

Acquired competences

Toulon small bay study

Gherissi, Belgandouze & Gobi

The small bay of Toulon is a poluted environment due to its touristic attractiveness and its high maritime flow. Therefore we can ask ourselves how the polution can impact the biodiversity and zooplancton population in the bay.

Gherissi, Lopez & Petit

Lake preservation requires optimal ecological conditions to ensure low eutrophication levels and durable stability. In the context of the la Verne water dam study, biotic and abiotic data enabled us to determine the oligotrophic state of the lake.

Springtails, urbanization and litter fragmentation

Gherissi, Ait Omar, Dallen & Baccouche

Mesofauna is a significant player in geochimical cycles. By recycling the organic matter, the small metazoans refuel soils and enable life to start again. However land artificialization induced by urbanization affects metazoa populations and by extent geochimical cycles. This study, conducted in the Lyon 1 University green spaces, focus on the abondance and diversity of springtails and how it impacts litter fragmentation.

PlanktoScope

Ecosystem

Axelle Gherissi

Welcome in my portfolioDiscover what my ecosystem has to offer ...

About me ... ​

Nanipora (Octorcorallia) eDNA detection in Okinawa

Axelle Gherissi - Supervisor : James Davis Reimer - Ryukyus University (Okinawa)

PHYOCE mission

BERTHELET F., FERRE G., GHERISSI A., HUTIÉ C., KHADHAR A., LOISEAU M., PAPA V., SEIBEL R.

The Planktoscope

Gherissi Axelle

What is an Ecoguide ?

Gherissi Axelle

Toulon small bay study

Gherissi, Belgandouze & Gobi

Evaluating la Verne dam eutrophication level

Gherissi, Lopez & Petit

Springtails, urbanization and litter fragmentation

Welcome in my portfolio
Discover what my ecosystem has to offer ...

About me ...