According to a new study, the Gentoo penguin is benefiting from climate change, while the chinstrap and Adélie penguins are not. Researchers used DNA analysis to assess the historic demographics and population structure of these species, and found that Gentoo penguins are climate change ‘winners’ and are expanding their range southward, while the two other […]
Tag: environment
Pacific salmon species benefit each other
The number of juvenile coho salmon in a stream can be up to three times higher if pink or chum salmon were there the season before, according to a new paper. Juvenile coho have been known to scavenge the carcasses or eggs of their cousins, but most of the coho in the latest study emerged […]
How bugs decide when to fly the coop
Many animals seek new habitat if they are too crowded or if there are too many predators, but new research suggests that the effect of these two factors can’t easily be separated. Researchers filled artificial pools with backswimmers, insects that normally swim but that can fly to a new pool if stressed. Introducing a predator […]
Genetics affirm existence of BC’s ‘coastal wolves’
New genetic information affirms what members of the Heiltsuk First Nation have long known: the islands off British Columbia host a population of ‘coastal wolves’ that is distinct but related to that of the timber wolves on the mainland. Examination of genetic markers from DNA collected in wolf droppings shows that coastal wolves are more […]
Milkweed needed to save monarchs
A new study bolsters the notion that a lack of milkweed in summer breeding grounds is contributing to the decline of the monarch butterfly. Previous research indicated that the decline of monarchs may be due to catastrophic die-offs in overwintering grounds in Mexico, caused by loss of forest habitat or extreme weather events linked to […]
Singing in the drain
Researcher from Taiwan have shown that the mientien tree frog uses concrete drains to amplify its mating calls. They used field studies to show that far more males call from inside the drains than outside them, and acoustic analysis to show that the structures do indeed increase call volume and duration. Original research paper published in […]
New Arctic permafrost won’t last
As Arctic lakes shrink, new permafrost develops around them, but according to a new study it’s not expected to last the century. Researchers looked at a retreating lake in Alaska and saw new permafrost had formed along the old lakebed in areas where willow trees had altered the soil’s moisture and heat content. The new […]
Is there a place for climate engineering?
While there is no substitute for lowering our emissions, some climate engineering approaches are more promising than others, according to a new analysis. Climate engineering refers to strategies that remove carbon dioxide from the atmosphere and/or reduce solar input, as opposed to preventing new emissions. Researchers from a variety of disciplines developed criteria to rank such […]
One in four major cities is water-stressed
The first global database of urban water sources and stress finds that one in four major cities use more than 40 per cent of the water available to them. This proportion is lower than previous estimates, in part because the new study accounts for the fact that many cities draw on distant watersheds, rather than […]
A hurricane by any other name…
Severe hurricanes with feminine-sounding names killed more Americans than similarly severe hurricanes with male names, a new study shows. The authors reached this conclusion after asking independent volunteers to rate the masculinity (e.g. Ivan) or femininity (e.g. Cindy) of 94 hurricanes that made landfall in the US between 1950 and 2012 and matching this with […]
How smell can relieve shopping anxiety
Researchers have found that smelling something reminiscent of an open space can relieve anxiety among people shopping in a crowded store, and vice versa. 197 students were invited to a mock shopping space that was either crowded or arranged in a mostly empty, minimalist design. The subjects shopping in a crowded space reported that smells […]
Do Roads Reduce Painted Turtle Populations?
A new study shows that high traffic roads in Eastern Ontario have no significant effect on the relative abundance of painted turtles. Researchers compared turtle populations from around 20 ponds, half of which were close to a freeway and the other half of which were as far as possible from any major roads. They found that […]
Does counting tracks to estimate animal populations actually work?
A new computer analysis shows that animal tracks can provide an accurate estimate of animal populations in a given area. Biologists often use animal tracks for relative estimates – e.g. more over here than over there – but because tracks can twist and turn, they shy away from using them to get an absolute number of […]
Plants – what’s eating them?
A new analysis of over 1000 plant species shows that on average, only about 5.3 percent of their leaves are eaten by insects and vertebrate grazers – less than a third of previous estimates. This means that most of the energy captured by photosynthesis doesn’t go ‘up’ the food chain, but instead is passed on […]
Ancient Canadian rocks shed light on first continents
A new analysis of some very old rocks from the Northwest Territories sheds light on how the very first continents formed. Rocks that make up the continental crust are less dense than those in oceanic crust, and today formed mainly in subduction zones, where oceanic crust and water get forced downward under overlapping tectonic plates. […]
Temperature influences gender of parasitic wasp
Extreme climatic events could influence the sex ratio of a parasite that controls pests such as the European corn borer, a new study shows. The parasitic wasp Trichogramma euproctidis lays its eggs inside the eggs of moths, preventing the moth egg from hatching into a caterpillar. The study showed that fewer females were born at […]
