Tag Archives: plastic

Bad Neighbors

Image Credit: ksblack99, Public Domain, Image Cropped

Exposure to potentially cannibalistic conspecifics induces an increased immune response (2020) Murray et al., Ecological Entomology, https://doi.org/10.1111/een.12806

The Crux

Plasticity is a powerful force in nature that allows organisms to change the way they look, the way they act, and even their own physiological processes. Prey species commonly exhibit plastic responses when they are exposed to predators, and recent studies have shown that these predator-induced effects can affect the immune function of the prey species. Because of this, predators have the potential to modify disease dynamics, either increasing disease/parasite infection by reducing the prey’s immune function, or decreasing disease by increasing immune function.

Interestingly, predators are not the only organisms that consume prey species. Some prey species eat both members of their own trophic level (an intraguild predator, see Did You Know) and members of their own species (a cannibal). Because they act like a predator (by eating a prey organism), there’s a possibility that these cannibalistic individuals may have the same effect on their potential victims. Today’s authors used larval dragonflies to investigate that exact question.

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The Anthropocene: A Human-Dominated Age on the Horizon

The impact of our species on the conditions and fundamental processes on Earth is unmistakable. From carbon emissions to the cities that dominate skylines to the plastics that swirl around in our seas, the evidence of our existence can be found anywhere. And now, a group of geologists considers our impact so drastic that a new epoch – the Anthropocene – should be declared. Whilst this change has gained support in much of the scientific community, others say that the Anthropocene is more about sensationalism or pop culture than science, as clear evidence for a new geological time is lacking. So whilst much of the scientific community, the general public and the media have already embraced the Anthropocene, the search for hard evidence for the start of a human-dominated age continues.

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Rasmus Hansson: The Intricacies of Environmental Politics

Rasmus Hansson, former leader of the Norwegian Green Party and the Norwegian WWF (Image Credit: Miljøpartiet de Grønne, CC BY-SA 2.0, Image Cropped)

Environmental politics is a tricky business. We live in a world where environmental crises are at the forefront of the news cycle, and in which science is simultaneously becoming the subject of distrust. So it makes sense that at this point, politics should be adapting and evolving as science does.

So when Rasmus Hansson stopped by NTNU last month, Sam Perrin and I took the chance to sit down with him and see whether this was the case. Rasmus studied polar bears at NTNU in the 70s, before later becoming the leader of the World Wildlife Fund in Norway and then of the Norwegian Green party. We spoke with Rasmus about the transition from conservation to politics, the clash of ideologies and the future of environmental politics.

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The Thought Process Behind a Sustainable Diet

With the age of consumption well and truly upon us, we cover some of the more important things to consider when trying to eat sustainably

With the age of consumption well and truly upon us, we cover some of the more important things to consider when trying to eat sustainably (Image Credit: Love Food Hate Waste NZ, CC BY-SA 4.0, Image Cropped)

Here at the Centre of Biodiversity Dynamics, we all pride ourselves in being a little more eco-conscious than most people (let’s not talk about the carbon footprint of our travels though). It is rare that we can make a meal together that involves meat since we are lousy with vegetarians. However, what we eat and how eco-friendly our diets actually are is a regular debate. This piece comes at the presupposition that the person reading this already has taken basic measures to be eco-friendly in their diet (i.e. not nomming on McDonalds’ reconstituted meat with a side helping of franken-fries). I am not going to talk about everything because there is frankly too much out there to discuss (and I’m not going to open a genetically modified can of worms).

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The Case for Environmental Optimism

Image Credit: Wibowo Djatmiko, CC BY-SA 3.0, Image Cropped

Almost a year ago, the current President of the United States pulled out of the Paris climate agreement. At that point, the scientific community, climate change activists, and anyone with a passing interest in science (and, you know, the survival of our species) could have been forgiven for thinking that we had finally forsaken our planet. Yet at the STARMUS Festival last year in Trondheim, I was particularly struck by American coral reef biologist Nancy Knowlton’s words on Earth Optimism, and why all may not be lost just yet.

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