Ecological data is constantly being collected worldwide, but how accessible is it? (Image Credit: GBIF, CC BY 2.0)
Tag Archives: ecology
Body coloration of an animal can be useful for not only attracting prey, but also avoiding being eaten. One important question is whether or not this coloration can simultaneously serve both purposes? (Image Credit: Chen-Pan Liao, CC BY-SA 3.0).
Multifunctionality of an arthropod predator’s body coloration (2019) Liao et al., Functional Ecology, https://dx.doi.org/10.1111/1365-2435.13326
One topic that has interested ecologists for decades is that of animal body coloration, and what function that coloration can serve for the animal. Despite this fascination and the work that has been done to study this aspect of animal biology, the actual mechanisms driving the evolution and maintenance of body color are not well understood. Many different aspects of an organism’s life can shape and affect body color, such as avoiding predators, attracting mates, and whatever resources an organism has available to create specific colors. In addition, many of these aspects often compete with one another, such that a color that is good for attracting mates may also make you more easily-spotted by a predator.
Spiders provide an excellent system in which to study the evolutionary significance of body colors, as previous work has shown that body color affects mate attraction, predator avoidance, and prey attraction. The authors of today’s study wanted to know if these complex color patterns could serve more than one function in the spider’s life.
With the King of the Monsters back for his second turn in cinemas, we go through the big, the bad and the bigger problems that a creature of this size might have if it lived on Earth. Is feeding on radiation useful? Don’t be ridiculous.
The Ecology of Godzilla
3:24 – Cinematic History of Godzilla
13:54 – The Ecology of Godzilla
42:16 – Godzilla vs. No-one
The Physiology of Godzilla
01:41 – 2014 Godzilla Need-to-Know
07:08 – The Physiology of Godzilla
37:14 – Vet’s PSA (Adopting Foreign Pets)
Dag Hessen (second from right) believes that the teaching of ecology needs to move forward, better integrating our impact on the planet (Image Credit: paal @flickr, Image cropped, CC BY 2.0)
Teaching ecology has taken up a large chunk of my year. I love doing it, and I thoroughly enjoy seeing students becoming engaged in new concepts. But the way we teach ecology can often be quite static, with too little emphasis on how our ecosystems are changing, and how we can communicate this to a world thoroughly in need of more scientific understanding.
One person working to change how we teach ecology is Dag Hessen. I spoke to Dag earlier this year about communicating science to children through literature, which you can read more on here. But during the discussion we got sidetracked and went in-depth on how the teaching of ecology needs to change.
This Peruvian warbling-antbird must walk a fine line between being different enough from its competitors to reproduce successfully, while staying similar enough to be able to recognize and outcompete the same competitors (Image Credit: Hector Bottai, Image Cropped, CC BY-SA 4.0).
Range-wide spatial mapping reveals convergent character displacement
of bird song (2019) Kirschel et al., Proc B, https://dx.doi.org/10.1098/rspb.2019.0443
In nature, many different organisms can be found in a single location, and sometimes those organisms are closely related to one another. When this happens, classical evolutionary theory predicts that these closely related species should differ in some ways, so as to differentiate members of their own species from others and avoid the costs associated with breeding with a mate that will not produce any viable offspring. This is called character displacement, and there are many examples of this in nature where two different species may be very similar when they live in different places (allopatry), but when they live in the same place (sympatry) they will differ in appearance, behavior, or the exact part of the local habitat that they live in (see Niche Partioning below).
A specific form of character displacement, called agonistic character displacement, occurs when traits or behaviors associated with competition differ between closely related species living in the same area. This is thought to reduce the costs of wasting energy on competing with an organism that you don’t really “compete” with. Agonistic character displacement can, however, result in greater similarity of traits when similar species live together, but previous studies in this area have not accounted for other causes of this similarity. Today’s authors wanted to do just that. Read more
American politicians Alexandra Ocasio-Cortez and Ed Markey, champions of the controversial environmentalist bill, the Green New Deal (Image Credit: Senate Democrats, CC BY 2.0)
If you’ve lost track of what’s going on in US politics (very excusable), you might have missed out on yet another issue that is dividing people. I’m not talking about the Mueller report, or gun legislation, or health care. I’m talking about the Green New Deal, named after the New Deal, a compilation of programs and projects that gave Americans jobs after the Great Depression and built quite a lot of infrastructure. The newest “Green” version is meant to do the same following the Great Recession that America has been suffering the aftershocks of since late last decade. An initiative sponsored by Democrats, the Green New Deal has come under fire from both sides for a wide range of reasons. While the movement for action against climate change is a global phenomenon, I am going to give a brief synopsis of what the Green New Deal represents in the US, and why it has been the subject of so much controversy.
The red lionfish, an aggressive, fecund, and competitive species invasive to the Atlantic Ocean (Image Credit: Alexander Vasenin, CC BY-SA 3.0).
The genomics of invasion: characterization of red lionfish (Pterois volitans) populations from the native and introduced ranges (2019) Burford Reiskind et al., Biological Invasions, https://doi.org/10.1007/s10530-019-01992-0(0123456789
Invasive species are one of the most destructive forces and largest threats to native ecosystems, second only to habitat loss. The “how” and “when” of a species invading new habitats is obviously important, and as such many studies focus on if invasive species are present and if they are spreading. Yet these studies often disregard the mechanisms behind why a species is spreading or succeeding in these new environments. The mechanisms are important here, because by and large most invasive organisms will have very small populations sizes, leaving them vulnerable to stochastic events like environmental flux, disease, and inbreeding depression.
Two key paradoxes of invasive species are that these small groups of invasive organisms tend to not only have more genetic diversity than the native species (making them more adaptable to environmental change), but they are also able to outcompete the native organisms, despite having evolved in and adapted to what may be a completely different environment. The authors of this study used genomic approaches to address and try to understand these paradoxes. Read more