Application
Biodiversity & Conservation
Understanding populations and informing conservation action with genomic tools.
Environmental DNA · Genomics · Bioinformatics
From DNA to decisions
Biodiversity, aquaculture, agriculture: we design the study, analyse your samples and help you interpret the results.
15+ years
of scientific experience
Deep Tech
label awarded by Bpifrance
End to end
from sampling to decision support
Station Ifremer
a team based in Palavas-les-Flots
Applications
One science. A whole world of applications.
Explore your environment.
Understand to act
From sample to decision.
A sample holds far more than DNA. It carries information about species, populations and ecosystems. Our role: help you understand it and put it to use.
LDgenX supports public and private organisations across the whole scientific chain. We bring molecular biology, sequencing and bioinformatics together around a single question: yours.
- Scientific project design. Your question is the starting point. Together we set the objectives and the approaches to bring in. Literature review, definition of objectives and indicators.
- Sampling strategy. Information starts in the field. The choice of matrices and the sampling strategy are designed for your question. Water, soil, sediment or biofilms. Triple pump, StickPump and towed Yellow Submarine for filtering in the field.
- Molecular analyses. Molecular biology links your samples to the data. From nucleic acid extraction on complex matrices to sequencing library preparation.
- Sequencing & dPCR. Amplicons, genomes or targeted detection: technologies are chosen according to the scientific objectives. Long reads (Nanopore) and short reads (Illumina, AVITI), targeted sequencing and microsatellites (qPCR, Sanger, KASP), digital PCR.
- Bioinformatics. Data are processed and analysed with bioinformatics approaches suited to your biological question. Bioinformatics and biostatistics: metabarcoding, metagenomics, RAD-seq, RNA-seq, WGS, epigenetics, GWAS.
- Interpretation. We place the analyses back in their biological context and help you understand the results. Interpretation and reporting of the results in an expert report.
- Decision support. Scientific knowledge becomes actionable information for your management, conservation or innovation projects. Actionable results for decision-making.
Our services
Understanding life, at every scale.
Complementary areas of expertise, brought together according to your scientific question and the specifics of your project.
Also: Targeted DNA tests · Research & Development · Sampling equipment
All our services
Service
Environmental DNA
Detection and monitoring of species through the analysis of DNA traces present in the environment.
Approaches
Discover this service
Genomics in practice
Concrete questions. Scientific approaches.
Environmental DNA · Case study
Reading the biodiversity of ports and estuaries.
A fish survey for the Artois-Picardie Water Agency.
- Client
- Artois-Picardie Water Agency
- Carried out by
- Qualyse, LDgenX and Prelevmar consortium
Reading the biodiversity of ports and estuaries.
A fish survey for the Artois-Picardie Water Agency. Client: Artois-Picardie Water Agency. Carried out by: Qualyse, LDgenX and Prelevmar consortium.
The question asked
How can knowledge of fish communities be improved, and how does eDNA compare with conventional data collection methods?
The eight sampled sites
- Dunkirk East (Port, Nord)
- Dunkirk West (Port, Nord)
- Calais (Port, Pas-de-Calais)
- Slack (Estuary, Pas-de-Calais)
- Boulogne (Port, Pas-de-Calais)
- Canche bay (Bay, Pas-de-Calais)
- Authie bay (Bay, Pas-de-Calais and Somme)
- Somme estuary (Estuary, Somme)
The approach
- Sample: In late November and early December 2025, three water replicates filtered simultaneously at 15 stations across eight ports and estuaries.
- Analyse: Two genetic markers, Teleo for bony fish and Elas02 for elasmobranchs: 23 and 13 taxa identified.
- Compare: In the Somme estuary, eDNA finds the four key species of the beam trawl monitoring (herring, whiting, common goby, sea bass) and detects species the trawl did not catch.
Constraints of the setting highlighted by the publication
- Currents: Currents move water, and with it the traces of DNA it carries.
- Turbidity: Abundant in estuaries, suspended particles cloud the water.
- Tides: The tide changes the water level and how waters mix through the day.
What the study brings
Median richness close between ports and estuaries, except for the Slack, but a different distribution of species; assemblages consistent with the expected ecological guilds. The study feeds the discussion on eDNA for monitoring aquatic environments.
Let’s discuss your project
Your question. Our next starting point.
A project in biodiversity, genomics or bioinformatics? Describe your needs to receive a proposal, or book a first conversation with our scientific team.
Or write to us: info@ldgenx.fr