
handle: 10261/79790
[Dos son las principales subespecies de trébol subterráneo en España: Trifolium subterraneum subsp. subterraneum y T. subterraneum subsp. oxaloides Nyman. La revisión de los datos que hemos recogido en numerosos inventarios, nos ha llevado a realizar un estudio que nos permita conocer factores implicados en la distribución de las subespecies en el territorio. Inicialmente nos hemos centrado en la provincia de Toledo, ya que es el lugar más septentrional en el que se encuentra la subsp. oxaloides , para estudiarlas comparativamente, debido a que ambas están allí representadas. Hemos encontrado a la subsp. subterraneum en 47 localidades y a la subsp. oxaloides en 16; en 7 de éstas crecía sola y en otras 9 acompañada de subterraneum. Estudiamos distintas variables bióticas y abióticas de los ejemplares y de sus hábitats, con el fin de observar diferencias existentes entre ellas. Los resultados muestran que el peso seco y la abundancia local, presentan diferencias acusadas. La influencia de las bajas temperaturas invemales en su distribución espacial y la respuesta a diversos factores litoedáficos, muestran las diferencias ecológicas existentes entre ambas. La isoterma de 5° de las temperaturas medias del aire en el mes de enero y la creciente acidez de los suelos parecen limitar c1aramenteía distribución de la subsp. oxaloides.]
[There are two main subterranean clover subspecies in Spain: Trifolium subterraneum subsp. subterraneum and I subterraneum subsp. oxaloides Nyman. The review of the data we got in many inventories, has led us to conduct a study to know factors involved in the distribution of the subspecies in the territory. Initially we focused on the province of Toledo (the northernmost place in which the subsp. oxaloides is found) to study comparatively the two subspecies, because both are represented there. We found subsp. subterraneum in 47 sites and oxaloides in 16; in 9 of the last, oxaloides grew up alone and in the other 9 accompanied by subterraneum. We studied various biotic and abiotic variables of the specimens and their habitats, in order to observe differences between them. Results show that dry weight , plant size and local abundance present marked differences. The inf1uence of low temperatures in the ir distribution and the response to various edaphic factors show ecological differences between both of them. The 5° C isotherm in the mean air temperature in January and the increasing acidity of the soils seem to c1early explain the limitations in the distribution of subsp. oxaloides.]
8 páginas, 1 figura y 6 tablas estadísticas
Peer reviewed
Soil nutrients, Diferencias infraespecíficas., Granulometry, Subclovers, Ecology, Granulometría, Ecología, Infraspecific differences, Nutrientes edáficos
Soil nutrients, Diferencias infraespecíficas., Granulometry, Subclovers, Ecology, Granulometría, Ecología, Infraspecific differences, Nutrientes edáficos
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