The Eucalyptus is a genus of plants mostly endemic to Australia. Because of its unique circumstances, it also has a number of adaptations that make it specifically attuned to its environment so that it can continue to survive in Australia.
Adaptations are features or structures that contribute to an organism's fitness--in other words, its survival rate. Not every feature is an adaptation, and one must separate incidental features from what are immediately beneficial to survival, which, even if it seems immediately obvious, still must be proven to be advantageous enough to impart the organism a greater fitness level.
Eucalyptus trees are also sometimes known as gum trees because of the amount of sticky, gum-like sap that they have in their trunks. This gum or sap is the product of vascular tissue that transports substances such as water, sugars, hormones, and minerals all throughout the plant.
Its leaves contain glands that produce volatile oil, which acts as a powerful toxic disinfectant. The oil is volatile because it evaporates when exposed to the air at normal temperatures. Despite this defense, some marsupials like koalas and possums are tolerant of the oils, and there are a number of insect pests that still use the eucalyptus as a food source.
Both the petals and stamen are fused into a cap called the operculum, from which the eucalyptus derives its name ("calyptos" means "well" and "covered"). This operculum protects and conceals the flower at the bud stage and then is shed once the flower begins to open.
After flowering, eucalyptus seeds develop a hard, woody, protective "pod", which are unique, so they are often used to identify entire species. Inside they contain a number of true seeds and infertile chaff. Eucalyptus plants also have an excellent ability to regenerate from seeds or shoots, increasing their ability to recover from brushfires.
- Photo Credit koala dormant image by Jj from Fotolia.com
Habitat for Eucalyptus Trees
A koala nestled in a tree and munching on leaves may be the scene in your mind when you think of a...
Adaptation of an Opossum
Opossums, like kangaroos, are marsupials, mammals with pouches in which mothers nurse and transport their young. In fact, they are North America's...
How Do Eucalyptus Trees Reproduce?
Eucalyptus trees are indigenous to Australia. They are interesting to environmentalists because they are one of the fastest-growing trees on the planet,...
Buying Eucalyptus Trees
Eucalyptus trees (Eucalyptus cinerea), also known as gum trees, are graceful and fragrant evergreens that were introduced to the United States from...
What Are the Physical Adaptations of a Koala Bear?
If asked to name an animal from Australia, you might say koala bear. Contrary to the popular name, koalas are not bears....
The Adaptations of the Baobab Tree
The baobab tree is the iconic tree of the African Sahara. It is readily recognized by its enormous trunk and, by comparison,...