Tag Archives: alien

Mark Davis: Rethinking Invasive Biology

Mark Davis' 2011 paper "Don't Judge Species on their Origins" was not well-received by sections of the ecological community. But why is a call for rethinking our attitudes to invasive species so controversial?

In the series Norway’s Newcomers, we’ve looked extensively at not only Norway’s non-native species, but the genetics, definition and even the defense of alien species. So it made sense that we’d eventually find our way to interviewing an invasion biologist. I was in St. Paul, Minnesota earlier this year and was lucky enough to sit down with Professor Mark Davis.

Mark has been a strong opponent of the demonisation of invasive species for decades. Whilst many ecologists’ first reaction is to eradicate any non-native species, Mark has urged caution, and encouraged the community towards less pejorative terms. I spoke with Mark about the impact our work has on public opinion, how we should talk about non-natives, and living with the impact of invasive species going forward.

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Making Lake Superior Again: Thoughts from the International Charr Symposium

Lake Superior, the location of the 9th International Charr Symposium

Lake Superior, the location of the 9th International Charr Symposium (Image Credit: Wikipedia Commons)

This week I’ve been lucky enough to represent NTNU at the 9th International Charr Symposium in Duluth, Minnesota, a conference focussing on one of my focal species in the genus Salvelinus. Conferences are like this are great for soaking in a swathe of alternative perspectives, so I thought I’d share a few thoughts from day one of the symposium, including a sign of success, one of innovation, and another of hope.

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In Defense of Aliens

It's important to remember that not all alien species are harmful, and we shouldn't treat them all as such

Building on last week’s article on defining invasive and alien species as well as the work of Professor Mark Davis, I am going to do the unimaginable for an ecologist and argue that maybe alien species aren’t always a bad thing. I want to emphasize that maintaining biodiversity is essential, but maybe we should focus on the role of species in their environment rather than their place of origin.

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The Sitka Spruce

The Sitka Spruce was introduced by the timber industry, and now covers almost 5 million hectares in Norway

The Sitka Spruce was introduced by the timber industry, and now covers almost 5 million hectares in Norway (Image Credit: Paul Harald Pedersen, Fylkesmannen in Nord-Trøndelag, CC BY 4.0 )Tanja Petersen

Once again, let us talk about trees. Do not be fooled by their innocent appearance – that is exactly what they want! In reality, they can be just as problematic as any animal species. This week I takes a closer look at the Sitka spruce (Picea sitchensis).

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Defining an Invader

With the rebranding of Nrwaoys' Black List as the Alien Species List, we look at what makes a species alien and/or invasive (Pictured: The invasive Yellow Sweet Clover)

Two weeks ago, Norwegian Science Institute Artsdatabanken (ADB) announced that they would be changing the name of their invasive and alien species index. Formerly known as the Black List, the institute decided to use a name with less negative connotations, “Fremmedartslista“, loosely translated, the Alien Species list. Given this series’ focus on species from that list, it seems like an appropriate time to look at how we define the terms ‘alien’ or ‘invasive’ species.

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Alien Trees & Filling the Knowledge Gap

recent report jointly published by WWF, Sabima, Friends of the Earth Norway and the Norwegian Botanical Society showed that alien tree species are one of the largest threats to native tree species, even inside protected areas. The news even reached Norwegian news outlet NRK. But why are alien trees a problem? Isn’t a tree, well, just a tree? As guest blogger Tanja Petersen explains, not quite.

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Invaders in the Garden

The Japanese Knotweed, an invasive species often found in gardens (Image Credit: Max Pixel, CC0 Creative Commons)

Guest post by Malene Nygård

Garden plants have a long tradition in Norway; from being used as medicine and food in the gardens of Catholic monasteries in the Middle Ages to today’s exotic ornamental plants. But this tradition also represents several centuries of unmonitored introductions of alien species, and it has left its mark in Norwegian nature.

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