Expansion threatens belugas: report

WINNIPEG — As plans to expand the Port of Churchill into a four-season trade corridor gather momentum, a University of Manitoba researcher has published a report on what ship traffic could mean for the beluga whales that gather in the Churchill River estuary each summer.

Veronica Coppolaro said more vessels in the waterways bring a risk that belugas will stop using the estuary for migration, which would impact the ecological landscape, tourism and communities that rely on the animals for food and cultural purposes.

“There are studies showing that (noises) change the way they swim, they change the way (the whales) are vocalizing, they change their main activity, and so this (expansion) can have consequences at different levels,” she said.

The Churchill River estuary is a marine habitat where the Churchill River empties into Hudson Bay. During the summer months belugas gather in the area to feed and give birth.

Belugas have sensitive hearing and use echolocation — a biological sonar system — for food and keeping track of their pods; so if they can’t hear due to the noise from ships, they will need to change their habitats.

In 2019 as part of her PhD research, Coppolaro began tracking beluga whale activity by using passive acoustic monitoring, a non-invasive way of “listening” to the estuary underwater. Coppolaro and her colleagues found persistently high activity in the areas that overlap directly with Port of Churchill operations.

The recordings were collected before and during the COVID-19 pandemic, when port activity was limited. The data is now being analyzed, but it offers a baseline for what future activity can be compared to when ships are consistently passing through the region.

The disturbances could stress the animals and affect reproduction levels, Coppolaro hypothesized. They could also cause other fish to leave the areas, causing a disruption to food sources.

The number of belugas in the Churchill River is hard to estimate, but during summer migration hundreds could be swimming in the area, making it a popular tourist destination.

“There isn’t really a lot of disturbance, but once you have ships and a lot more vessel traffic in general, everything is going to change underwater,” she said. “This is why we need continued monitoring.”

The provincial and federal governments have taken the marine habitat into consideration. In February the province announced it was spending $250,000 to study the feasibility of a new national marine conservation area in western Hudson Bay as it moves forward with the port’s expansion.

National marine conservation areas are federally protected sections of freshwater or marine coastlines. The Parks Canada-managed areas are intended to represent the nation’s various marine ecosystems.

At the time, premier Wab Kinew said economic development and environmental protection can co-exist.

In August the provincial and federal governments, alongside the Arctic Gateway Group — which owns the Port of Churchill — presented new research confirming the feasibility of year-round shipping from the port.

The reports stated advances in marine technology and declining sea ice due to climate change mean shipping could be possible all year.

With that, Coppolaro said, ships would essentially be following belugas around the bay and could disturb them in other areas, too.

Other research groups are interested in continuing the monitoring of beluga activity as shipments enter and exit the port to see the short-term impacts of the expansion, Coppolaro said, adding she supports the port’s expansion, but wants to see a balance.

“I hope that the province and the government will find a way to kind of have it hand in hand: the port expansion, the economic side and the conservation,” she said.

» Winnipeg Free Press