[en] Processes and threats of different habitats can be known by measuring their diversity. For that, plot-sampling at fine-grain scale (<1.000 m2) is required since it provides information to obtain different diversity-measures. Thus, plots can be an appropriate way to study plant-communities in the Gorbeia Natural Park and its surroundings. In this work, different open habitats (grasslands, heathlands and wetlands) were analyzed through nested-plots. Thereby, plots from different sizes (1 cm2-100 m2) were sampled, specifically 39 below 10 m2 and 28 in 100 m2. Diagnostic species and diversity of the five groups achieved by K-means clustering are analyzed. Different factors and indices were used for measuring diversity (α and β diversity, species richness and Shannon index). Moreover, main ecological differences among plant-communities were statistically analyzed using data from sampled ecological factors. Regarding to diversity, while anthropogenic grasslands were richer in species at lower scale, dry grasslands had a greater number of species at upper scale. In addition, z value of acid and anthropogenic grasslands had a lower value comparing to works using the same methodology. pH and soil cover, particularly stones and rocks cover, were proposed as major drivers of diversity. Moreover, it is suggested that, soil dryness, which was not sampled through ecological factors, also had a considerable importance. In conclusion, more nested-plot sampling would be positive in this area, specifically in the heterogeneous wetlands, since they are less studied than grasslands. Moreover, extra sampling would be beneficial in order to confirm the found differences.

[eu] Dibertsitatea neurtuz habitat ezberdinen prozesu eta arriskuak ezagut daitezke. Honetarako, eskala xeheeko (<1.000 m2) txantel-laginketa beharrezkoa da, honek dibertsitate neurri ezberdinak lortzeko informazioa eskaintzen baitu. Hau horrela, txantelak Gorbeia Parke Naturala eta bere inguruko landare-komunitateak ikertzeko tresna egokia izan daitezke. Ikerketa honetan, Gorbeiako habitat irekien (larre, sastrakadi eta hezeguneen) dibertsitatea eta ekologia ikertu dira, laginketa kabituen bitartez. Honetarako, eskala ezberdinetan (1 cm2-100 m2) hainbat azpi-txantel lagindu dira, 39 10 m2-tik behera eta 28 100 m2-tan. K-means partizioz bereiztutako bost landare-komunitateen espezie diagnostikoak eta dibertsitatea analizatu da, azken hau hainbat alderdi eta neurriren bitartez (α- eta β-dibertsitatea, espezie aberastasuna, Shannon indizea). Bestalde, landare-komunitateen arteko diferentzia ekologikoak lagindutako aldagai ekologikoen bitartez estatistikoki testatu dira. Dibertsitateari dagokiola, emaitzek eskala txikienean larre antropogenikoak espezietan aberatsenak direla adierazi dute eta, eskala handienetan larre lehorrak. Gainera, lorturiko sega-larre eta larre azidofiloen z balioak metodologia berdina erabili duten ikerketetako balioak baino baxuagoak dira. Komunitate guztien arteko dibertsitateak diferentzia adierazgarriak ditu pH-a eta estaldura ezberdinen, bereziki arroka eta harri estalduraren, erangintzat eman dena. Gainera, lagindutako aldagai ekologiko bariko lurzoru lehortasunak garrantzia ere duela ondorioztatu da. Oro har, laginketa-kabitu gehiago egin beharko litzateke arean, bereziki hezeguneetan, larreak bezain ikertuak ez baitaude eta heterogeneotasun handia aurkeztu baitute. Honek aurkitutako diferentziak konfirma litzake.