Distribución potencial de las especies del libro rojo de briófitas de Colombia

Abstract

The bryophytes in an extensive sense are plants that fulfill an important ecological role as soil constituents and modulators of environmental humidity, among many other functions, in spite of this, their conservation is affected by several factors such as pollution, deforestation, others. Due to this, rigorous monitors of the richness, diversity and distribution of the bryophyte species have been necessary to know their state of conservation. In 2002, the only red book for bryophytes known to date was published trying to establish the state of conservation of these populations, since then, research has been improved but conservation mechanisms have been carried out, in addition to mega-science tasks. engineering and infrastructure that have advanced the country, this has generated a substantial loss of the habitat of bryophytes. In order to know and compare the distribution of the bryophyte species of the Colombian Red Book, the protected areas and to recognize the most relevant environmental variables that distribute the distribution of these species, were selected in the number of occurrences, importance and recommendation of species Breutelia karsteniana (formerly B. maegdefraui), Pohlia elongata (formerly P. leptodontium), Lejeunea catinulifera (formerly Amphilejeunea viridissima), Sematophyllum flavidum, Streptopogon lindigii, Dicranella strumulosa and Pleurozia paradoxa found in the red book. Starting from this and making use of the MaxEnt program which applies a learning technique of "maximum entropy model", that from a set of environmental variables and geographic occurrences, maps of potential distribution will be constructed with a probability of distribution when the specific site meets ideal conditions for the species. The most relevant results are concentrated in the potential distribution over the three mountain ranges, the knot of the past, and the Andean region in general. The species P. paradoxa obtained its potential distribution in a conservative way in the department of Nariño, its specific ecology that does not allow to locate suitable places where it has been found until now. On the other hand, the other species have found suitable sites in most of the region and in mountainous areas, some like S. flavidum and S. lindigii even in the lowlands. Finally, he concludes that the present work corresponds to the first of its kind for bryophytes in Colombia, with which its future implications are highly relevant. On the other hand, the Colombian mountain ranges, the areas where the majority of our species converge, being the shelter for many of the species at risk, it is recommended to take into account the specific ecology of each of the species, in addition to its natural history.