Watson is an ecologist with a research focus on habitat fragmentation and the ecological interactions between plants and birds. He has an interest in the tools of ecological monitoring such as survey methods and acoustic monitoring. He became fascinated with mistletoe during his Honours degree and subsequently wrote a global review of mistletoes as a keystone resource in forests and woodlands worldwide. After this publication, he conducted a large removal experiment of mistletoes from woodlands in Australia and showed that mistletoes acted as drivers of bird diversity, especially insectivores. He wrote
Mistletoes of Southern Australia in 2011 (2nd ed., 2019)/. Currently, his research focus is on the effects of mistletoe on tree health and soils, mostly in farming and production landscapes, including macadamia crops in Queensland, the introduction of mistletoe in urban trees to increase biodiversity within the urban landscape, and conservation of sandalwood in Western Australia. Watson uses social media and public talks to try and revise the reputation of mistletoe from just a parasite to a "ecological Robin Hood" which supports and encourages biodiversity. Watson developed the 'standardized search' using the
Chao estimator equations to easily construct species accumulation curves in the field to ensure that wildlife monitoring between sites is comparable. He was also one of five chief instigators of the Australian Acoustic Observatory. Watson, in his persona of "Dr Dave" has appeared in three series of educational videos including Dr Dave in Box-Gum Grassy Woodlands, Dr Dave in the Murray Catchment and Dr Dave in the Outback Watson is currently a
Professor of Ecology at
Charles Sturt University in
Albury, NSW, Australia. == Personal life ==