Adapting to temperature is critical for any organism. Thus, many mammals, especially small, temperature-sensitive ones, have adaptations allowing them to modulate their metabolisms to adapt to their local winter temperatures, at an energetic cost (Chappell, 1980; Garcia-Elfring, Barrett, & Millien, 2019; Geiser & Ruf, 1995). The optimal metabolic modulation could be very precise, and would […]
Month: April 2020
What does it take to be extreme? Insights from toxic springs in Southern Mexico
Taking a hike through the Villa Luz Natural Park in Southern Mexico, you’ll quickly find yourself enraptured. As you cross the steel bridge that hangs over the river, the lush, bright green foliage of the jungle and sounds of birds and howler monkeys surround you. The deeper you go, the faint sulfurous smell of rotten […]
Jumping genes help resolve obscure species relationships
Figuring out evolutionary relationships between species is hard enough when they diversified recently, but what if they rapidly diversified many millions of years ago? A group of baleen whales, the rorquals (Balaenopteridae), for example, diversified starting about 10.5 million years ago (Figure 1; Árnason et al. 2018). Within this group, the evolutionary relationship of the […]
Three’s not a crowd! Does genetic variation across a tri-species hybrid zone respond to environmental differences across the landscape?
Hybrid zones elucidate the barriers to interspecific reproduction, the raw material for speciation, and thus are unparalleled resources for evolutionary biologists (Harrison 1993). However, when hybrid zones appear to lack reproductive barriers to gene flow, they pose a different set of questions, for example, what are the historical and contemporary factors which facilitate gene flow […]
Oversalted: How does a tiny floating plant cope with urban runoff?
Humans are globally redistributing salt. Soils (Rengasamy 2006) and freshwater (Dugan et al. 2017) are becoming saltier, while the ocean is experiencing fresh and salty anomolies (European Space Agency 2019). In North America and other temperate zones, salt is commonly used to deice roadways and sidewalks. This makes life much safer for people, but when […]