No public access
master's thesis
DYNAMICS OF OLIGOTROPHIC AND COPIOTROPHIC BACTERIA IN RELATION TO EARTHWORM SPECIES (Eisenia fetida)

Mirta Eberhard (2014)
Sveučilište Josipa Jurja Strossmayera u Osijeku
Odjel za biologiju
Metadata
TitleDINAMIKA KOPIOTROFNIH I OLIGOTROFNIH BAKTERIJA U TLU U OVISNOSTI O GUJAVICAMA VRSTE Eisenia fetida
AuthorMirta Eberhard
Mentor(s)Goran Palijan (thesis advisor)
Abstract
Provedeno je mikrokozmičko istraživanje utjecaja gujavica vrste Eisenia fetida na brojnost kopiotrofnih i oligotrofnihbakterija u tlu tijekom razdoblja od šest mjeseci. Gujavice su važan element makrofaune tla koji svojim djelovanjem poboljšava svojstva tla, te povećava brojnost i aktivnost bakterija. Koristeći koncept oligotrofije-kopiotrofije nastojao sepovezati, gujavicama potaknut, efekt transformacije organske tvari u raspoloživi oblik s porastom broja bakterija, odnosnopromjenom omjera kopiotrofnih i oligotrofnih bakterija. Formirano je četiri vrste mikrokozmosa (tretmana): sterilizirano tlo s gujavicama, sterilizirano tlo bez gujavica, nesterilizirano tlo s gujavicama i nesterilizirano tlo bez gujavica. Analize su vršene svakih 28 dana, a obuhvatile su mjerenja fizikalno-kemijskih parametara tla i broja bakterija iz tla i probavila gujavica. Zabilježen je značajan pozitivan utjecaj gujavica na broj kopiotrofnih bakterija, te negativan utjecaj na broj oligotrofnih bakterija. U steriliziranom tlu njihov utjecaj je bio isti i na kopiotrofne i na oligotrofne bakterije. Kod te vrste tretmana gujavice su dovele do ranije uspostave zajednice kopiotrofnih, ali i oligotrofnih bakterija, u odnosu na kontrolna tla.Omjer kopiotrofnih i oligotrofnih bakterija je u svim tretmanima ukazivao na dominaciju oligotrofa. Nisu zabilježene značajnije oscilacije omjera osim u nesteriliziranom tlu s gujavicama, gdje su kopiotrofi krajem istraživanja nakratko preuzeli dominaciju.
Keywordssoil earthworms oligotrophic bacteria copiotrophic bacteria soil organic matter
Parallel title (English)DYNAMICS OF OLIGOTROPHIC AND COPIOTROPHIC BACTERIA IN RELATION TO EARTHWORM SPECIES (Eisenia fetida)
Committee MembersGoran Palijan (committee chairperson)
Davorka Hackenberger Kutuzović (committee member)
Ljiljana Krstin (committee member)
GranterSveučilište Josipa Jurja Strossmayera u Osijeku
Odjel za biologiju
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineNATURAL SCIENCES
Biology
Study programme typeuniversity
Study levelgraduate
Study programmeMaster of Science Graduate University Study Programme in Biology; specializations in: Master of Biology
Study specializationMaster of Biology
Academic title abbreviationmag.biol.
Genremaster's thesis
Language Croatian
Defense date2014-10-31
Parallel abstract (English)
A microcosm study was used to assess the earthworm Eisenia fetida influence on soil copiotrophic and oligotrophic bacteria during the six month period. Earthworms as an important part of soil macrofauna can improve soil properties and increasebacterial abundance and activity. The goal was to link earthworm mediated transformation of soil organic mater within creased bacterial growth by applying oligotrophy-copiotrophy concept. Four types of microcosm (treatmans) were formed:sterilized soil with earthworms, sterilized soil without earthworms, non-sterilized soil with earthworms, and non-sterilized soil without earthworms. Analysis of soil physical-chemical properties and bacterial number from soil and earthworm gut were conducted every 28 days. In non-sterilized treatment, earthworms yielded positive effect on number of copiotrophic bacteria, and negative on number of oligotrophic bacteria. Presence of earthworms caused earlier establishment of bothcopiotrophic and oligotrophic bacterial communities in sterilized soil. The ratio of copiotrophic to oligotrophic bacteria indicated dominance of oligotrophic bacteria in all treatments. There were no significant oscillations in the ratio, except in non-sterilized soil with earthworms where copiotrophs were briefly dominant towards the end of the experiment.
Parallel keywords (Croatian)soil earthworms oligotrophic bacteria copiotrophic bacteria soil organic matter
Resource typetext
Access conditionNo public access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:181:293376
CommitterVesna Radman Meic