Komparativna analiza epilitskih dijatomejskih zajednica u izvorima i potocima planine Konjuh (Bosna i Hercegovina)
DOI:
https://doi.org/10.54652/rsf.2016.v46.i2.73Ključne riječi:
diversity, epilithic diatoms, springs, streams, habitats, Konjuh Mountain, (B&H)Sažetak
UDK: 574.587:582.26/.27(234.422 Konjuh)
Izvori su prepoznati kao značajni refugiji važni za očuvanje biodiverziteta slatkovodnih biotopa. U radu je analiziran biodiverzitet i upoređivana je struktura epilitskih zajednica silikatnih algi između izvorišta i pripadajućih potoka na planini Konjuh (BiH). Uzorkovanje algi kremenjašica (silkatnih) i mjerenje osnovnih fizičko-hemijskih parametara na terenu provedeno je na pet manjih planinskih tekućica, pri čemu su uzorkovana izvorišna područja i njima pripadajući gornji tokovi tekućica u ljetnoj i jesenjoj sezoni tokom 2013. godine. Epiliton je uzorkovan standardnom metodologijom prema Kelly i sar. (1998). U laboratoriju su izrađeni i pregledavani trajni preparati silikatnih algi uklopljeni u Naphrax, pri čemu je određivana relativna abundanca vrsta brojanjem do 400 frustula. Utvrđeno je da su izvorska staništa brojnija i raznovrsnija vrstama (srednja vrijednost H´loge = 1,67), a t testom je potvrđeno da se vrijednosti Shannon-Wienerovog indeksa diverziteta statistički značajno razlikuju u poređenju sa staništima gornjih tokova potoka (srednja vrijednost H´loge =1.15; t=2.79; p=0.013). Sličnosti u strukturi zajednica s različitih lokaliteta istraživane su metodom nemetričnog multidimenzionalnog skaliranja, baziranom na Bray-Curtis indeksu sličnosti. Upotrebom permutacijskog Manova testa, dokazano je da postoji razlika u strukturi zajednica izvora i potoka (Pseudo F=2.66, p=0.012), dok razlika u strukturi zajednica između ljetne i jesenje sezone statistički nije potvrđena (Pseudo F = 0.586, p = 0.876). Najfrekventnije i najabundantnije vrste u uzorcima izvora bile su: Achnanthidium minutissimum (Kützing) Czarnecki, Cocconeis pseudolineata (Geitler) Lange-Bertalot, Gomphonema pumilum var. elegans E.Reichardt & Lange-Bertalot, Meridion circulare (Greville) C.Agardh i Planothidium lanceolatum (Brébisson ex Kützing) Lange-Bertalot. Najfrekventnije i najdominantnije u staništima potoka su bile: Achnanthidium minutissimum (Kützing) Czarnecki, Cocconeis placentula var. euglypta (Ehrenberg) Grunow, Cocconeis placentula var. lineata (Ehrenberg) van Heurck i Cymbella tridentina Lange-Bertalot, M.Cantonati & A.Scalfi. Izvori su heterogena staništa sa specifičnom florom dijatomeja i imaju stabilniji tok vode u odnosu na potoke. Iako su površinom jako mala područja, diverzitet vrsta koji ih nastanjuje ne smije biti zanemarivan prilikom planiranja upotrebe ovih prirodnih resursa.
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