We've known this for centuries, but the explanation is not simple.
It's one of the oldest questions tackled by naturalists: Why do tropical regions have so much biodiversity compared with other areas of the globe?
The second hypothesis is that the tropics are much older environments that haven't been interrupted by big freezes, so species have had a longer time to evolve. Most of today's biodiversity has been developing over the past 200 million years, but it has been affected by multiple ice ages. The expansions and contractions of the polar ice sheets"completely remove life from the northernmost [and southernmost] areas," Dobson said.
However, although the tropics have a high rate of speciation , these balmy regions also have a high rate of species extinction. High rates of speciation can lead to smaller populations of species, in which many species are interacting or in competition in a small area, leaving them at a higher risk of extinction.
Norge Siste Nytt, Norge Overskrifter
Similar News:Du kan også lese nyheter som ligner på denne som vi har samlet inn fra andre nyhetskilder.
Listening to Amazon rainforest to understand deforestation | Digital TrendsForests are complex ecosystems, so a loss of trees can have wide-reaching implications for biodiversity -- a topic that is now being studied using sound.
Les mer »
How Often Should You Test If Exposed to COVID? Here's What the CDC, FDA SayPossible run-ins with COVID are becoming more common, as infections continue to spread across Illinois.
Les mer »
Accepting the UnexpectedCan't seem to push away those unwanted thoughts and feelings? Here's a healthier approach to take, according to Heifetz_M
Les mer »
How to send text messages from the comfort of your computerIt’s 2022. Cars are driving themselves around some cities. Some kinds of clothing are becoming robotic. So why is sending a text message from your computer still kind of a crapshoot sometimes?
Les mer »
Reader: Cops Shoot Innocent People and Then Ban Businesses?Should Denver allow food trucks back in to LoDo during let-out?
Les mer »
Florida Has An Outrageous New Law Targeting Teachers. Here's Why I'll Be Breaking It.'My students aren’t the snowflakes Gov. DeSantis assumes they are... and neither am I.'
Les mer »