Researchers from La Trobe University’s Center for Freshwater Ecosystems have revealed the hidden effects of climate change on mountain stream ecosystems; this may signal the early emergence of insects. A study published in the journal Global Change Biology Dr., a senior lecturer in the Department of Environment and Genetics. The research, led by Michael Shackleton, focused on streams around Falls Creek and predicted significant changes in water temperatures due to climate warming and its effects on aquatic life.

It has been determined that the rate of temperature accumulation will increase over the years, which will likely affect the growth and development of organisms.

“These changes could have significant impacts on aquatic organisms, particularly those that leave mountain streams in the autumn, and the food webs they serve,” Dr Shackleton said.

“In the future, end-of-season organisms may emerge from river systems into air that is 12 degrees warmer than now.

“As a result, we expect insects in particular to emerge early this year because they will receive enough thermal energy to become adults sooner.”

Researchers used advanced modeling techniques and analyzed historical water temperature data to predict future water temperatures in streams under climate change scenarios.

The study strongly calls for proactive conservation efforts to reduce the impacts of climate change on fragile ecosystems.

“There are profound impacts on the structure and functioning of ecosystems as a warmer climate affects insect metabolism, availability of food resources, availability of spawning grounds and reproductive potential,” Dr Shackleton said.

“Aquatic species maturing and coming ashore represent a significant flow of energy and nutrients, but changes in the life cycles of different animals can fragment predator-prey interactions.

“This early emergence of insects is just one example of how climate change is altering our natural world.”