CAJ | 학술논문

铜藻Sargassum horneri（Turner） C．Agardh是浙江沿海常见的大型海藻之一，对海洋生态系具有重要作用。近年来由于环境恶化，南麂列岛海域的大量铜藻藻场退化消失。因此探讨其退化机制，是维持沿海生态平衡和恢复藻场的重要理论基础。本研究对比研究了不同光强（低光，LL：40～50μmol· m-2· s-1；高光， HL：100～110μmol· m-2· s-1）、不同CO2浓度（低CO2浓度，LC：0.76μg· L-1；高CO2浓度，HC：1.96μg· L-1），对铜藻生长状况的影响，以期了解铜藻对环境胁迫的适应。结果表明：1）高光条件下，铜藻的相对生长速率（RGR）为1.80％· d-1，是低光条件下（RGR＝0.85％· d-1）的2.1倍；2）高CO2浓度能促进铜藻的生长，HC的RGR（2.89％· d-1）是LC（2.49％· d-1）的1.16倍；3） HL和HC培养的藻体，其株高和叶片数分别优于LL和LC的，但LL和LC的Chla含量高于前者。
동조Sargassum horneri（Turner） C．Agardh시절강연해상견적대형해조지일，대해양생태계구유중요작용。근년래유우배경악화，남궤렬도해역적대량동조조장퇴화소실。인차탐토기퇴화궤제，시유지연해생태평형화회복조장적중요이론기출。본연구대비연구료불동광강（저광，LL：40～50μmol· m-2· s-1；고광， HL：100～110μmol· m-2· s-1）、불동CO2농도（저CO2농도，LC：0.76μg· L-1；고CO2농도，HC：1.96μg· L-1），대동조생장상황적영향，이기료해동조대배경협박적괄응。결과표명：1）고광조건하，동조적상대생장속솔（RGR）위1.80％· d-1，시저광조건하（RGR＝0.85％· d-1）적2.1배；2）고CO2농도능촉진동조적생장，HC적RGR（2.89％· d-1）시LC（2.49％· d-1）적1.16배；3） HL화HC배양적조체，기주고화협편수분별우우LL화LC적，단LL화LC적Chla함량고우전자。
Sargassum horneri ( Turner ) C.Agardh, one of the common macroalgae along the coast of Zhejiang Province, plays an important role in the marine ecosystem .Because of the environmental deterioration within decade years, S.horneri beds along the Nanji Archipelago had been degenerated .Therefore, to study the degenerated mechanism of S.horneri is the key point to keep littoral ecosystem balance and restore the macroalgae beds .In this study, we investigated the effect of two irradiance levels (low light, LL:40-50 μmol· m-2· s-1;high light, HL:100-110 μmol· m-2· s-1) and two CO2 concentrations (low CO2, LC:0.76 μg· L-1;high CO2, HC:1.96 μg· L-1 ) on the growth of S.horneri, in order to detect the response of this species to HL and HC .The results showed that the relative growth rate ( RGR) of S.horneri in HL was 1.80%· d-1 , 2.1 times of that grown in LC (0.85%· d-1 ) .The RGRs were 2.89%· d-1 in HC and 2.49%· d-1 in LC, respectively , and the former was 1.16 times of the latter.Both the height of thalli and the number of leaves in treatments of HC and HL was higher than LC and LL , respectively, but the Chla contents were higher in LC and LL than in HC and HL , respectively.