Why eDNA fractions need consideration in biomonitoring

Area of Science:

• Ecology
• Molecular Biology
• Environmental Science

Background:

• Environmental DNA (eDNA) analysis is transforming biodiversity monitoring.
• eDNA allows large-scale assessment of organismic diversity with high taxonomic resolution.
• eDNA comprises extracellular and intracellular fractions with distinct properties.

Purpose of the Study:

• To review eDNA fractions and their properties.
• To present a concept for enhancing spatial and temporal resolution in eDNA monitoring.
• To guide the appropriate selection of eDNA fractions for accurate biodiversity data.

Main Methods:

• Review of existing literature on eDNA fractions.
• Description of methods for obtaining eDNA fractions from environmental samples.
• Presentation of a four-scenario concept for eDNA monitoring.

Main Results:

• Identification and characterization of extracellular and intracellular eDNA fractions.
• A conceptual framework to improve spatial and temporal resolution of eDNA monitoring.
• Emphasis on how fraction choice impacts data interpretation.

Conclusions:

• Appropriate selection of eDNA fractions is crucial to avoid misinterpreting biodiversity data.
• Fraction-specific eDNA analyses hold potential for micro- and macro-organism studies.
• Future research should focus on unlocking the full potential of eDNA fraction-specific analyses.