Mercury rising. How the climate is driving recent increases in the mercury levels of freshwater fishes

Mercury is a toxic heavy metal that is present in many fishes that we eat. Although environmental regulations have cut down on mercury emissions in developed nations, the level of mercury in many top predator fish including large mouth bass has been increasing in recent decades. A complex mix of many different factors including local weather conditions and global climate patterns affect the levels of mercury in fish.

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O Christmas tree, O Christmas tree. How Christmas tree farms affect bird communities.

Grasslands, such as hay meadows, have been increasingly replaced with Christmas tree farms across Europe as the Christmas tree industry expands. A recent study documented higher bird abundance and more bird species in Christmas tree farms than in grasslands that had low shrub and bush (i.e. hedges) abundance. Grasslands with a large amount of hedges had similar amounts of birds compared to Christmas tree farms. As Christmas tree farms take up more and more grasslands, there is a need for more research to determine the quality of bird habitats within Christmas tree farms.

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Alien Plants in Urban Landscapes

Alien plant species, or non-native plant species, provide positive benefits, such as improving aesthetics and contributing to local food production. However, these species can also have negative effects on urban landscape by producing allergy-inducing pollen and taking over habitat from native species. In order to effectively manage urban landscapes, more research is needed on the positive and negative impacts of alien plant species.

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Thirsty trees are more susceptible to damaging beetle infestation

Summer, winter, and multi-year drought events initiate outbreaks of the damaging spruce beetle. Droughts suppress the ability of trees to produce chemicals to defend themselves against the fatal bugs.

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