Search

Copyright of Revista U.D.C.A Actualidad & Divulgación Científica is the property of Universidad de Ciencias Aplicadas y Ambientales U.D.C.A and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Livestock impacts ecosystems, particularly through the consumption and dispersion of introduced plant species that affect native flora. The dispersion of seeds introduced by exotic mammals is an example of facilitation among exotic species. In this work, three aspects (diet composition, viability and germination of seeds) were approached to evaluate the role of domestic livestock in the dispersion of Rosa rubiginosa, sweetbriar rose, on edges of low-altitude vegas in Mendoza province. Fresh feces were collected from cattle and horses (n = 60), and the intact seeds of Rosa rubiginosa were counted. The diet of both species was mainly made up of native flora, especially grasses (Poaceae). Both cows and horses increased the germination rate of intact sweetbriar rose's seeds compared to established controls. We can highlight that both introduced herbivores use sweetbriar rose as an important resource and act as legitimate dispersers of their seeds. [ABSTRACT FROM AUTHOR]

Feral horse management: the situation in Argentina. There are many feral horses (Equus caballus) populations in Argentina, including some in natural protected areas. These large mammals are considered alien invasive species, and at high population densities can have serious impacts on native biodiversity. In other countries, their populations have been intensely managed, but in Argentina management is scarce and inconsistent. Only the population in Tornquist Park, Province Buenos Aires, has been temporarily reduced. Horses are highly valued by the public and management is often contentious. Only methods considered as humane, like live capture with adoption or fecundity control are accepted. It is crucial to implement science-based management in an adaptive manner, taking into account the human dimensions of the problem, with more participation of the decision makers in the media and social outreach. There is much we still don`t know about feral horses in Argentina, like geographic location and population size, demography and impact of most populations. In Argentina, feral horse management should be strategic and follow the precautionary principle in areas were the problem is considered a priority. [ABSTRACT FROM AUTHOR]