All posts tagged with south-america

The solitary sea squirt Ascidiella aspersa is native to the Northeastern Atlantic, from the Mediterranean Sea to Norway. Living in shallow sheltered sites and harbors, this species has a fast growth rate and is able to produce a large number of larvae.

These attributes have helped make it a successful colonizer of non-native environments, such as the Southwestern Atlantic, where it has become an invasive species introduced likely via ships.

Dr. Evangelina Schwindt, Head of the Grupo de Ecología en Ambientes Costeros from CONICET in Argentina, studies Ascidiella aspersa as part of her research as a marine invasive ecologist. Her work involves researching the interactions between invasive and native species, the patterns and processes occurring in biological invasions from the historical and present-day perspectives, the impact caused by invasive species, and the management strategies that can be applied.

Alexander von Humboldt (1769-1859) was a man who believed all of nature was interconnected, and that by affecting one aspect of nature, other parts of nature would be affected, too—for good or ill. Humboldt believed that one’s own emotions and subjective views were necessary in order to completely experience nature. Simply taking measurements or classifying animals, plants, rocks and other forms of life would never allow one to fully experience the truth of nature.

Cross-dressing seems to have been a botanical fad in the 18th century – the great Swedish botanist Carl Linnaeus (responsible for the system by which we name animals and plants today) famously posed in an authentic Sami costume from Lapland, not realising it was a woman’s outfit. Jeanne Baret (or Baré or Barrett – spelling was not as fixed and consistent in the 18th century as it is now) dressed as a boy to accompany the voyage of Louis-Antoine de Bougainville in circumnavigating the globe; the voyage itself was an exercise in saving face after the disastrous French defeat to the British during the Seven Years War (when Britain gained control of Quebec). The intrepid Baret certainly saw more of the world than the notoriously stay-at-home Linnaeus, even though her name today is not well-known.

In 1858, Journal and Proceedings of the Linnean Society: Zoology published a paper proposing what would later be recognized as a revolutionary scientific concept: the theory of Evolution by means of Natural Selection. If we were to ask you who penned this publication, chances are your response would be Charles Darwin.

cordillera (cor·dil·le·ra); a noun.

Definition of cordillera : a system or group of parallel mountain ranges together with the intervening plateaus and other features, especially in the Andes or the Rockies.

Origin: early 18th century: from Spanish, from cordilla, diminutive of cuerda ‘cord’, from Latin chorda (see cord). (Oxford English Dictionary)