As seas around Aotearoa heat at an unparalleled rate, scientists are starting to understand what it might mean for marine ecosystems
found that large hot blob events have killed more than a million seabirds in a year.
“In the background of all of this you’ve got anthropogenic climate change. As the oceans are warming it’s much easier to tip the ocean over into a marine heatwave, because you’re starting from a warmer baseline,” says Dr Robert Smith, an oceanographer who studies marine temperatures with the Moana project and University of Otago.‘The ocean has been doing the heavy lifting’
A 15m, 40-tonne southern right whale also called tohorā shadows scientists waiting for the opportunity to deploy a satellite tag on its back.Dr Rochelle Constantine, one of New Zealand’s top marine scientists, spends much of her time tracing the journeys and migrations of New Zealand’s larger marine mammals. Some, like the Tohorā, or southern right whale, are regarded as “climate sentinels” as their changes in behaviour can signal shifts beneath the surface.
“These are spaces that have been relatively normal for … hundreds of thousands or millions of years, and are now actually changing so rapidly that animals and ecosystems can’t quite cope.”‘‘We thought we had more time’’In the hills above Blenheim, between the wineries and pine plantations, trucks rumbled through January along the narrow road. They would make the journey 160 times over, through the hot summer months, winding from the coast to the hill and back again.
“We thought we had more time,” he said. “Climate change is a slow process. But faster than many people think.”
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