중파 자외선에 노출된 남극 규조 Chaetoceros neogracile와 Stellarima microtrias의 성장과 질산염 흡수량의 변화 KCI OTHER
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 강재신 | - |
dc.contributor.author | 강성호 | - |
dc.contributor.author | 이윤호 | - |
dc.contributor.author | 심정희 | - |
dc.contributor.author | 이상훈 | - |
dc.date.accessioned | 2021-03-17T08:29:44Z | - |
dc.date.accessioned | 2021-03-17T08:29:44Z | - |
dc.date.available | 2021-03-17T08:29:44Z | - |
dc.date.available | 2021-03-17T08:29:44Z | - |
dc.date.created | 2020-02-04 | - |
dc.date.issued | 2003-03 | - |
dc.identifier.issn | 1226-2617 | - |
dc.identifier.uri | https://sciwatch.kiost.ac.kr/handle/2020.kiost/40525 | - |
dc.description.abstract | Two isolated Antarctic marine diatoms, Chaetoceros neogracile VanLandingham and Stellarima microtrias (Ehrenberg) Hasle and Sims were examined to show changes of growth and uptake rate of nitrate due to UV-B irradiance. Chlorophyll (chl) a concentration was regarded as the growth index of diatom. The diatoms were treated with UV-B radiation and cultured for 4 days under cool-white fluorescent light without UV-B radiation. Two levels of UV-B exposures were applies: 1 and 6 W m−2. Durations of UV-B treatment were 20, 40 and 60 minutes under 6 W m−2 and 1, 2, 3, 4 and 5 hrs under 1 W m−2. The control groups were cultured at the same time without UV-B radiation. The growth rates of two diatoms decreased under 1 and 6 W m−2 UV-B irradiances than that of control group. After 4 days, chl a concentrations of C. neogracile were increased more than 4 times from 133 μgol−1 to 632 μgol−1 in control group. However, the concentration of experimental groups under 1 W m−2 UV-B were only increased from 139 μgol−1 to 421 μgol−1 during one hour and the chl a concentrations were decreased from 144 μgol−1 to 108 μgol−1 during five hour. Growth of diatom dramatically more decreased under 6 W m−2 UV-B than 1 W m−2 UV-B. The chl a concentration of experimental groups under 6 W m−2 UV-B for one hour was only increased from 111 μgol−1 to 122 μgol−1. In the case of S. microtrias showed also similar pattern to C. neogracile by UV-B radiation. The uptake rates of nitrate by the two strains were decreased abruptly under 6 W m−2 UV-B irradiances. When two strains were treated under 1 and 6 W m−2 UV-B during one hour, the strains were only continued growth and uptake of nitrate under 1 W m−2 UV-B. This experimental evidence shows that exposure to UV-B radiation especially to high irradiance of UV-B decreases diatom survival and causes lower decrease of nutrient concentrations by microalgae in Antarctic water. Furthermore, evidence suggests that microalgal communities confined to near-surface waters in Antarctica will be harmed by increased UV-B radiation, thereby altering the dynamics of Antarctic marine ecosystems. | - |
dc.description.uri | 3 | - |
dc.language | Korean | - |
dc.publisher | 한국조류학회I | - |
dc.title | 중파 자외선에 노출된 남극 규조 Chaetoceros neogracile와 Stellarima microtrias의 성장과 질산염 흡수량의 변화 | - |
dc.title.alternative | UV-B Effects on Growth and Nitrate Dynamics in Antarctic Marine Diatoms Chaetoceros neogracile and Stellarima microtrias | - |
dc.type | Article | - |
dc.citation.endPage | 20 | - |
dc.citation.startPage | 13 | - |
dc.citation.title | ALGAE | - |
dc.citation.volume | 18 | - |
dc.citation.number | 1 | - |
dc.contributor.alternativeName | 강재신 | - |
dc.contributor.alternativeName | 강성호 | - |
dc.contributor.alternativeName | 이윤호 | - |
dc.contributor.alternativeName | 심정희 | - |
dc.contributor.alternativeName | 이상훈 | - |
dc.identifier.bibliographicCitation | ALGAE, v.18, no.1, pp.13 - 20 | - |
dc.identifier.doi | 10.4490/ALGAE.2003.18.1.013 | - |
dc.description.journalClass | 3 | - |
dc.description.isOpenAccess | N | - |
dc.subject.keywordAuthor | Antarctic diatoms | - |
dc.subject.keywordAuthor | Chaetoceros neogracile | - |
dc.subject.keywordAuthor | chlorophyll a | - |
dc.subject.keywordAuthor | growth and nitrate dynamics | - |
dc.subject.keywordAuthor | Stellarima microtrias | - |
dc.subject.keywordAuthor | UV-B | - |
dc.description.journalRegisteredClass | kci | - |
dc.description.journalRegisteredClass | other | - |