Environmental DNA
Can we detect hollow inhabitants from DNA they shed into the air?
Environmental DNA (eDNA) is a powerful, non-invasive tool used to monitor wildlife by detecting genetic material organisms shed into their environment. Found in water, soil, or air, eDNA allows researchers to identify species present in an area without direct observation or capture.
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eDNA offers an innovative method for detecting species that inhabit tree hollows or nestboxes with very little disturbance to the habitat. Animals that use the habitats for nesting or shelter leave behind traces of DNA through shed skin cells, feathers, urine, feces, or other biological materials.
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By sampling surfaces, materials or air in the surrounding environment, we aim to extract and analyze eDNA to identify which species have recently occupied the hollow or nestbox.
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If effective, this technique would minimize disturbance to animals and reduce the need for more invasive or time-consuming survey methods. eDNA analysis could also provide insights into species presence over time, revealing patterns of hollow usage and seasonal activity. When combined with habitat data, eDNA results can help inform conservation strategies, such as identifying key habitat trees, prioritizing areas for protection, or guiding artificial hollow installation.
Research led by E. Hahn (CSIRO), R. Tulloch (CSIRO), L. Schwanz. D. Willemsen