Hayfever is one of the most common allergic conditions, affecting as many as 10 million people in the United Kingdom. It is most well-known to be triggered by ragweeds in the United States and by grasses in the UK. Ragweeds were introduced to Europe in the 19th century, rapidly spreading by 1940.
It is believed that the threshold for clinical symptoms of hayfever is as low as 1-3 ragweed pollen grains/m3, which is significantly lower than other well-known pollen allergens, like grass and birch. Continue reading →
The United States is divided over the existence of climate change. The conservative right-wing party in the U.S., the Republican party, is widely known for its anti-climate change beliefs. The Democratic Party, our left-wing liberal party, strongly believes in climate change and the need to tackle it. Does this type of relationship between political ideology and opinion on climate change exist elsewhere? Aaron et al (2016) looked at similar populations in Canada, Australia, and the European Union, and found similar divides in those countries between the left, and right wing- coalitions. They argue that the issue has been become politicized in much of the developed world. However, the United States remains an outlier due to the intensity of the divide. The authors attributed this to the greater degree of politicization in general versus other developed countries. Continue reading →
Habitat loss is the primary threat to the survival of most tropical biodiversity. Typically, this habitat loss is driven by deforestation for agricultural use. However, deforested landscapes are rarely homogenous fields with low diversity; most often, forest fragments are left embedded in a matrix of varying types of agriculture, from open field monocultures, to pastures and forest-mimicking shaded plantations. The process of fragmentation has a significant negative effect on the biodiversity present in the area; however, fragments are often able to support a variety of species, as are some types of agriculture, such as agroforestry. Less is known about the capacity of such landscapes to sequester and store carbon. What little has been done has focused on carbon in agroforestry systems, with promising, though mixed, results. Continue reading →