Today’s Topic :- Environment + Climate change + Wolf spiders + Alaska Arctic + USA
| Article By Amit Kumar [ mydatawords.com ] | updating on June 15, 2020 |
Wolf spiders in a warming to the Alaska Arctic……
Wolf spiders are among the most important predators in the Alaska Arctic
The new research from Washington University in St. Louis and the study conducted in Alaska suggests that as female wolf spiders become larger and produce more offspring, competition among them increases triggering higher rates of cannibalism and reducing the number of young spiders that survive to adulthood.
According to Amanda koltz, biology researchers said in our experimental data suggest that when there are lots of spiders around they turn to cannibalism more frequently and in the new study its likely a reflection of increased competition among the spiders for resources.
In the areas of the Arctic biologists have found that wolf spiders are bigger following years with longer summers. This suggests that as climate change continues to warm up the Arctic wolf spider body sizes will generally become larger.
In animals such as spiders that regulate their body temperature externally are particularly likely to experience changes. In some areas of the Arctic, biologists have found that wolf spiders are bigger following years with longer summers and that climate change continues to warm up the Arctic wolf spider body sizes will generally become large and the same time the number of offspring that female produce tends to increase as females become larger so bigger spiders might translate to more spiders in the future.
According to the biologists for the observations at two sites in the Alaskan Arctic where the body size of the locally dominant species of wolf spider naturally varies. She paired this comparative field based study with a mesocosm experiment where she manipulated the number of wolf spiders in an enclosed space to see how exposure to higher spider densities affects wolf spider.
In the field population discovered that the presence of larger female spiders was associated with fewer and this was unexpected as larger females produce more offspring using stable isotope analysis and found that the spiders at the site with larger females had different diets than at the site with smaller females.
According to the biologists koltz cannibalizing on other spiders of the same species reduces competition by reducing the number of other spiders around and other studies has shown that wolf spiders that are only fed other wolf spiders do not live as long as those that eat varied diet even they reproduce more. The result from study are a reminder that changes in invertebrate body size driven by climate change could have widespread ecological.
For wolf spiders fecundity increases with body size , but in image a wolf spider mother with her babies and wolf spiders that were experimentally exposed to higher densities underwent a dietary shift similar to that of the field population.
where females were bigger and the dietary shift was consistent with that shift toward cannibalism would look like and spiders were larger and reproductive rates higher spiders cannibalized each other more often and wolf spiders from lower latitudes have previously been shown to cannibalize each other and behavior affected natural population of wolf spiders has not clear yet.
* Note – Researcher and biologists to continue research on wolf spider in the region of the Alaska Arctic.
Thank you for reading….
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