What makes a species rare?

In a community, it is almost always true that some species are common while most are rare. This pattern is demonstrated by plotting species abundance distributions (see Magurran 2003 or Verbeek 2014 for excellent overviews) observed in many real life communities. Local abundance is not the only facet of rarity – species can also be defined as rare or common in terms of their overall...
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Share your story: World Fish Migration Day 2016

Call for videos – deadline extended to May 7th! Migration plays a central role in the life cycle of many fish species. For feeding, reproducing, or simply completing their life cycle, fish sometimes need to move long distances, within freshwater environments or between marine and freshwater systems. Well-known fish such as eels, salmons, and sturgeons in waters of North America and Europe...
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Niche conservatism: which niche matters most?

Niche conservatism - or the degree to which plants and animals retain their niches and related ecological traits through space and time – is a classic concept in ecology receiving renewed interest in recent years. This is partly because of its relevance to predicting species’ responses to global change, since a tendency toward conservatism would mean that species have only a limited capacity to...
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Saving the Australian Lungfish – through its stomach

The Australian lungfish, (Neoceratodus forsteri), is one of only five extant lungfish species in the world. It is a member of the oldest living vertebrate genera on the planet, with fossil records dating back 380 million years. At one time distributions extended to the center of the Australian continent, but at present only the Australian lungfish remains in a small number of rivers of southeast...
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Chehalis River: endemic fish and non-native plants

Non-native aquatic plants can have far reaching and unforeseen impacts on habitat for fish, invertebrates, and other wildlife; however, logistical constraints often don’t allow for investigation of impact across multiple trophic or community levels. The lack of comprehensive information regarding impact of non-native plants on aquatic ecosystems can hinder managers’ ability to prioritize...
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