Tag Archives: warming

Parrots in Norway

The Norwegian landscape is a beautiful thing. Spruce and pine groves piled on the side of mountains and fjords, moose and deer popping up in backyards, woodbirds flitting about on pristine hiking trails. Parrots screeching bloody murder into your ears as you re-enter the city.

No you did not read that wrong. It’s not happening yet, it in a couple of decades parrots, a type of bird not really associated with the sub-Arctic, could be a regular presence around Norwegian cities. So how could this happen, and why is it really quite concerning?

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The Big Challenge: Increasing City Biodiversity

Image Credit: GuoJunjun, CC BY-SA 3.0 NO, Image Cropped

The Big Challenge Science Festival is currently in Trondheim, bringing a host of celebrities, scientists and futurists together. Their goal is to present solutions for the challenges the planet currently faces, and get people thinking about how they can adjust their lives to help the planet. While there are some big names in attendance, there are also a large number of local students and scientists working tirelessly on stands, and it’s them that I spent yesterday working alongside.

There’s some fantastic stuff on display. I was particularly impressed by the use of VR in a couple of exhibitions. One stand presented a worst case scenario for warming planet, with one of Trondheim’s most famous laneways submerged in water (although the man clinging to a floating car tire waving for assistance may somewhat disturb the kids). Nearby was another VR experience where you could shoot cars, carbon molecules and chimneys, transforming them into bikes, trees and solar panels respectively. The tent next to us had a great range of displays, presenting practical and simple options for living sustainably and also letting you snack on insects and other arthropods!

Our own stand was part of the Futurum exhibition, which postulated how Trondheim may look in 2050. It focussed on biodiversity, and how Trondheim’s wildlife will change over the next 30 years with increasing urbanisation and a warming climate. On loan from the Natural History Museum was a selection of species that could conceivably arrive in Trondheim with a 1-2 degree temperature increase. It was fun to see kids’ faces contort at the thought of a parrot being a common presence in Trondheim, but with Ring-Neck parrots already as far north as Brussels, it could happen within their lifetime.

I was pleasantly surprised at the willingness of some children to accept that new species weren’t necessarily a good thing. Most of them were entranced by the sight of a grey squirrel, but readily understood that it could mean the demise of the red squirrel and some local bird life. Likewise, I was surprised at how many parents could immediately recognise the species likely to disappear from Trondheim, and acknowledge how many more Black-Headed Gulls and Northern Lapwings they could see only twenty years ago.

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NTNU’s Tanja Petersen explains how species life the Pacific Oyster or the Grey Squirrel could be in Trondheim within 30 years (Image Credit, Øystein Kielland, CC BY 2.0)

It was also encouraging to see how many people have started to let portions of their garden grow wild in an effort to allow insects, and thus birds and mammals make their way back into urban areas. The exhibition had 2 fantastic videos compiled by Øystein Kielland focussing on the difference between a green area and a biodiverse one, and how fragmentation has devastated local plant and insect populations. So the number of adults who had already started letting areas around their house grow unchecked was encouraging. Two particular highlights were the couple who eagerly showed us the badger who had recently taken up residence in their backyard, and the girl who nodded eagerly and started telling me all about her insect hotels.

One thing I always struggle with in these situations is communicating uncertainty. Whilst it’s fun to see jaws drop at the thought of parrots in Norway, it’s difficult to communicate the ‘maybe’ factor in the amount of time it takes to engage someone in these issues. The point of the Big Challenge is to get people to act, so I hope that people walk away thinking that if they don’t start living more sustainably there could be huge species’ turnover, but I don’t want to present a worst case scenario, or talk in absolutes about issues that are very much only possibilities. So any success stories you’ve had communicating uncertainty in these scenarios would be very much welcome below!

I’ll be back at the Futurum exhibit at Krigseilerplass near the Royal Garden today. If you’re in Trondheim, I highly recommend stopping by. You can read more about the event here.

Extreme Warming Events Could Increase Reindeer Population Stability

Extreme warming events may sound like bad news to reindeer, but they could help increase population stability

Extreme warming events may sound like bad news to reindeer, but they could help increase population stability (Image Credit: Christopher Michel, CC BY 2.0)

More frequent extreme climate events stabilize reindeer population dynamics (2019) Hansen et al., Nature Communications, https://doi.org/10.1038/s41467-019-09332-5

The Crux

Whilst climate change has been causing (and will cause) a myriad of environmental problems, it’s important to remember that not all species will be negatively affected by more extreme weather events. One example is reindeer on the Arctic island of Svalbard, according to this week’s paper.

Taken at face value, an increased frequency of extreme warming events may not sound like a good idea for a cold-adapted species. But despite the fact that it can lead to rain falling and freezing over snow, rendering massive patches of food inaccessible, the authors show that this can actually lead to increased population stability.

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If You Can’t Stand the Heat, Get Out of the Pond

Dragonflies like this Western Pondhawk female are particularly vulnerable to warming due to climate change. (Image Credit: Eugene Zelenko, CC BY-SA 4.0)
Simulated climate change increases larval mortality, alters phenology, and affects flight morphology of a dragonfly (2018) McCauley et al., Ecosphere, doi:10.1002/ecs2.2151

The Crux

Climate change is something that we hear about on a daily basis. The dire warnings tend to concern sea levels rising and temperatures varying so much that we have more intense and deadly storms than before, but these are all direct effects of the climate. Another thing that climate change can do is have indirect effects on organisms.

Organisms with complex life cycles spend the juvenile part of their lives in one environment before moving on to the adult stage in another environment. The researchers in this study wanted to know how simulated climate change during the juvenile stage of the organisms lifetime could affect the adult stage.

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Invasive Species and Climate Change

The next 50 years will see parts of the planet warm significantly. So how does this impact invasive species?

In this series, we’ve looked mostly at species that have been introduced at defined points in time. The Pink Salmon and the Red King Crab were introduced into Russian waters near Norway in the 50s, the Canada Goose was brought to Europe in the 30s, the Sitka Spruce in the late 1800s. But with the onset of climate change, warmer conditions in the Arctic and sub-Arctic mean that the doors will open for more gradual arrivals. So let’s look at how climate change will facilitate the arrival of these newcomers.

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