%0 Journal Article
%T Evaluaci車n preliminar del grado de amenaza de los helechos y licofitas de Argentina Preliminary appraisal of threat degree of Ferns and Lycophyta from Argentina
%A Gabriela E. Giudice
%A Juan Pablo Ramos Giacosa
%A Mar赤a Lujan Luna
%A Cecilia Macluf
%J Bolet赤n de la Sociedad Argentina de Bot芍nica
%D 2011
%I Sociedad Argentina de Bot芍nica
%X El objetivo de esta contribuci車n es realizar una evaluaci車n preliminar del grado de amenaza de los helechos y Lycophyta que crecen en Argentina, con el fin de proponer estrategias para su conservaci車n. Para ello se tuvieron en cuenta los taxa end谷micos as赤 como aquellos que crecen en 芍reas reducidas de pa赤ses lim赤trofes. Las categor赤as (1 a 5) fueron asignadas de acuerdo con las propuestas por el PlanEar, considerando el 芍rea de distribuci車n y su abundancia relativa o rareza. Como resultado de este estudio, 18 taxa de helechos y Lycophyta de Argentina fueron considerados amenazados (categor赤as 4, 4-5, 5), de un total de 34 taxa end谷micos. La principal causa de amenaza de la flora en esta regi車n es la p谷rdida o degradaci車n del h芍bitat por las actividades humanas, poniendo en riesgo la supervivencia de muchos taxa end谷micos. Se sugieren estrategias combinadas de conservaci車n, con 谷nfasis en la protecci車n in situ junto con la conservaci車n ex situ en bancos de esporas. The aim of this contribution is to provide a preliminary evaluation of the endangered species of ferns and Lycophyta that inhabit Argentina, in order to recommend strategies for their conservation. For this purpose, we considered the endemic taxa as well as those which grow in reduced areas from neighboring countries. Categories (from 1 to 5) were assigned according to the PlanEar procedure, taking into account the distribution of the taxa and their relative abundance or rarity. As a result of this study, 18 of 34 endemic taxa of ferns and Lycophyta growing in Argentina were considered endangered (categories 4, 4-5, 5). The main cause of flora threat is loss or degradation of habitats by human activities, which affect the survival of many endemic plants from Argentina. Integrated strategies for conservation, emphasizing in situ preservation in their natural habitats, together with ex situ conservation by means of spore banks are suggested.
%K Argentina
%K Helechos
%K Lycophyta
%K Diversidad
%K Categorizaci車n
%K Conservaci車n
%K Argentina
%K Ferns
%K Lycophyta
%K Diversity
%K Categorization
%K Conservation
%U http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722011000100013