environmental science research for everyone
City habitats are often much warmer due to lower forest cover and an increased density of manmade surfaces which retain heat. Increased temperatures can greatly affect animals that develop as male or female depending on the incubation temperature of the eggs. Read on to find out how mothers of eastern water dragons deal with living in the warm cities of Australia.
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Koeck B, Závorka L, Aldvén D, Näslund J, Arlinghaus R, Thörnqvist PO, Winberg S, Björnsson BT & Johnsson JI (2019)
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Salt marshes are full of crustacean inhabitants. In particular, fiddler crabs and purple marsh crabs of New England modify these coastal ecosystems by burrowing beneath the waterlogged soils, chewing up plants, and increasing nutrient exchange rates. But it is uncertain to what extent each species contributes to the modification of a salt marsh. Research by Alexandria Moore found the presence of crabs had a significant effect on multiple aspects of salt marsh health and that the herbivore, purple marsh crab, modifies salt marsh ecosystems beyond eating plants.
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During the fall of 2018, California had some of the worst and deadliest fires to date, with devastating costs to human communities. Communities of plants and animals are also greatly impacted by fires. But how does wildlife respond to wildfires? Burns alter the environment and open up new habitats allowing smaller shrubs to recolonize in areas that were dominated by tall trees. A recent study in Oregon suggests that elk utilize a wide array of habitats and that burned forests are critical areas for food for many herbivores.
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Coastal New England isn’t independent from the world of invasive species. The Asian shore crab has encroached on many crustaceans habitats in the last few decades and recently this includes the American lobster. Work done by Baillie and colleagues suggest that specific life stages of the lobster may be negatively impacted by the invasion of the crab. Not only will understanding the interactions between these two species aid in preservation of one of North America’s most important fisheries, it may also provide critical insight into the fascinating relationship between endemic and invasive species.
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If you’ve been to a busy park during lunch hour, surely, you’ve noticed that many birds are on the prowl for some of your delicious lunch crumbs! Recently, urban ecologists have been interested in learning how much human food animals eat, and how it might affect them. Read on to learn more about how the Australian ibis decides whether to grab some human grub or stick to its natural diet.
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Article: Grutter, A. S., De Brauwer, M., Bshary, R., Cheney, K. L., Cribb, T. H., Madin, E. M. P., …
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Boreal forests of Alaska are expanding north and to higher latitudes due to higher annual temperatures, but the snowshoe hare may be limiting the growth of these forests.
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For many animals, life in the city is no easy task. However, some animals are able to exploit the features of the city and resulting in larger body sizes and more reproductive advantages compared to forest populations. Read more to find out whether a permanent urban resident and an urban newcomer both gain these advantages in the city.
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Hundreds of toxic chemicals were measured in tuna across global oceans to show that location of capture may matter more than other criteria for fish advisories.
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