Environmental DNA (eDNA) refers to genetic material obtained directly from environmental samples such as water, soil, air, or sediments, without isolating target organisms. It consists of extracellular DNA and cellular fragments shed through excretion, secretion, reproduction, or decomposition. eDNA-based methods typically involve sample collection, DNA extraction, amplification of taxonomically informative genetic markers (e.g., mitochondrial or ribosomal loci), and high-throughput sequencing or qPCR for detection and quantification. This topic encompasses methodological optimization, degradation kinetics, transport dynamics, contamination control, and bioinformatic pipelines, and is central to non-invasive biodiversity assessment, community composition profiling, invasive species surveillance, and ecological monitoring across aquatic and terrestrial ecosystems.
Environmental DNA (eDNA) tests can identify genetic material left by organisms in the environment, such as cells and excrement, but surveys of ocean wildlife can be difficult and expensive, and standard eDNA tests are also ...
Ecology
19 hours ago
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The coastline of South Australia has been affected for nearly a year by an unprecedented harmful algal bloom which has led to the deaths of millions of fish and sharks, impacted marine mammals and birds and affected the health ...
Ecology
Mar 5, 2026
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Natural history museums contain an astonishing snapshot of the planet's biodiversity. Using this information to better research and inform conservation projects could help lead the way in nature recovery and restoration.
Ecology
Mar 4, 2026
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Underground, intricate networks of soil fungi underpin the functioning of terrestrial ecosystems. Yet despite their global importance, only 30% of global ecosystems have been sampled for these fungal partners. Arbuscular ...
Ecology
Feb 27, 2026
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In the canals, marshes, and swamps of the Florida Everglades, invasive fish are silently slipping into new waterways. Among them are the Asian swamp eel and the bullseye snakehead, two air-breathing predators that live in ...
Ecology
Feb 25, 2026
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Biodiversity is changing across the planet, yet governments still lack the robust, consistent data needed to track these changes and guide effective conservation. Now, a new study led by the University of Amsterdam (UvA), ...
Plants & Animals
Feb 23, 2026
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Can students be on the front lines of conservation? A new Canada-wide study, published in Metabarcoding and Metagenomics, suggests they can. The efforts of some 5,000 students produced data detailed enough to reveal complex ...
Ecology
Feb 23, 2026
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Antarctic scientists have trialed a DNA "barcoding" technique that could improve biosecurity measures that help protect polar ecosystems from invasive marine species. The research, led by Australian Antarctic Program scientists, ...
Ecology
Feb 23, 2026
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The role of soil and forests in greenhouse gas sequestration has been studied for a long time. However, forests are also home to invisible organisms that may affect the climate. "Soil, water and peatlands have been studied ...
Ecology
Feb 17, 2026
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Every living organism has its own genetic "blueprint": the source code for how it grows, functions and reproduces. This blueprint is known as a genome. When scientists sequence a genome, they identify and put in order the ...
Ecology
Feb 17, 2026
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