Ebro - Ecology


The Ebro Delta Natural Park, with a total surface area of 7,802 ha, was established in 1986 and is of international importance for 8 of its plant species and 69 of its vertebrate fauna. It has some 95 breeding species of birds, is also very important for a wide range of overwintering species, and serves as an essential stopover point for large numbers of migratory birds. The Ebro delta has the world's largest colony of Audouin's Gulls. In 2006 it held a record number of more than 15,000 pairs.

There are concerns about the ecological impact of introduction of foreign species that is almost always a burden, affecting much of the original ecosystem introduced species rapidly caused the extinction of numerous indigenous species. The introduction of American crayfish Procambarus clarkii has resulted in economic losses, introduced elsewhere for cultivation, its success is attributable to its ability to colonise disturbed habitats that would be unsuitable for the edible iberian crayfish. The semiaquatic rodent Myocastor coypus or nutria is presuming to expand in some northwest tributaries of the head damaging crops and protected national parks in Basque Country.

The zebra mussel, an invasive species, is expanding upstream in Ebro waters. Due to its rapid rate of reproduction, the species adversely affects the port underwater machinery as well as that of dams and hydroelectric plants, in addition to competing with native species. Following the introduction of Wels catfish are fishes whose number is in clear and rapid decline. Since its introduction in the reservoir Mequinenza in 1974 - has spread to other parts of the Ebro basin over Ebro and its tributaries, especially river Segre. Some endemics species of iberian barbels, genus Barbus in the Cyprinidae, having once been abundant especially in the Ebro river. Competition and predation by Wels catfish has caused its complete disappearance in the middle channel Ebro around 1990. The ecology of the river also, has now a major development in the amount of aquatic vegetation, seaweed and algae. Barbel species from mountain stream tributary of the Ebro that Wels catfish has not colonized, were not affected.

Read more about this topic:  Ebro

Other articles related to "ecology":

History Of Biology - Twentieth Century Biological Sciences - Ecology and Environmental Science
... See also History of ecology In the early 20th century, naturalists were faced with increasing pressure to add rigor and preferably experimentation to ... Ecology had emerged as a combination of biogeography with the biogeochemical cycle concept pioneered by chemists field biologists developed quantitative methods such as the quadrat and ... Clements, was important in early plant ecology ...
Murray Bookchin
... A pioneer in the ecology movement, Bookchin was the founder of the social ecology movement within anarchist, libertarian socialist and ecological thought ... philosophy, history, and urban affairs as well as ecology ...
Banff National Park - Ecology - Wildlife
... Due to the harsh winters, the park has few reptiles and amphibians with only one species of toad, three species of frog, one salamander species and two species of snakes that have been identified ... At least 280 species of birds can be found in Banff including bald and golden eagles, red-tailed hawk, osprey, and merlin, all of which are predatory species ...
Ecology - Relation To The Environment - Physical Environments - Biogeochemistry and Climate
... The ecology of global carbon budgets gives one example of the linkage between biodiversity and biogeochemistry ... the Earth's history, regulated to a large extent by the ecology of the land ...

Famous quotes containing the word ecology:

    ... the fundamental principles of ecology govern our lives wherever we live, and ... we must wake up to this fact or be lost.
    Karin Sheldon (b. c. 1945)