海洋科学
海洋科學
해양과학
MARINE SCIENCES
2013年
9期
54-60
,共7页
小球藻(Chlorella vulgaris)%纵向沉降%光照强度%叶绿素%沉速
小毬藻(Chlorella vulgaris)%縱嚮沉降%光照彊度%葉綠素%沉速
소구조(Chlorella vulgaris)%종향침강%광조강도%협록소%침속
Chlorella vulgaris%vertical migration%light intensity%chlorophyll%settling velocity
通过用自制沉降柱研究小球藻(Chlorella vulgaris)在表层不同光强作用下纵向沉降特性以及分布规律,为进一步了解水库中小球藻的纵向分布提供参考。实验室培养的小球藻按其直径可分为小于4.5μm、4.5~5.5μm、大于5.5μm 3个等级,不同粒径的小球藻在不同光强的作用下沉速不同；实验条件下小球藻的沉速分布在0.1~468.2μm/s,均值为32.8μm/s；小球藻的沉降速度随沉降柱表层光强增强而降低,无光状态下时沉速是表层光强为10000 lx的2~3倍；小球藻直径大小与沉速呈正相关,直径4.5~5.5μm的小球藻沉速是3.5~4.5μm的5~6倍；沉降稳定后实验柱中小球藻从表层至底层粒径逐渐变大,除底层外小球藻在纵向峰值随光强增加而向下延伸,如实验柱表层光强为1000 lx和4000 lx时小球藻峰值出现实验柱表层,而表层光强为7000 lx和10000 lx的实验峰值分别出现在水下300 mm和600 mm处。
通過用自製沉降柱研究小毬藻(Chlorella vulgaris)在錶層不同光彊作用下縱嚮沉降特性以及分佈規律,為進一步瞭解水庫中小毬藻的縱嚮分佈提供參攷。實驗室培養的小毬藻按其直徑可分為小于4.5μm、4.5~5.5μm、大于5.5μm 3箇等級,不同粒徑的小毬藻在不同光彊的作用下沉速不同；實驗條件下小毬藻的沉速分佈在0.1~468.2μm/s,均值為32.8μm/s；小毬藻的沉降速度隨沉降柱錶層光彊增彊而降低,無光狀態下時沉速是錶層光彊為10000 lx的2~3倍；小毬藻直徑大小與沉速呈正相關,直徑4.5~5.5μm的小毬藻沉速是3.5~4.5μm的5~6倍；沉降穩定後實驗柱中小毬藻從錶層至底層粒徑逐漸變大,除底層外小毬藻在縱嚮峰值隨光彊增加而嚮下延伸,如實驗柱錶層光彊為1000 lx和4000 lx時小毬藻峰值齣現實驗柱錶層,而錶層光彊為7000 lx和10000 lx的實驗峰值分彆齣現在水下300 mm和600 mm處。
통과용자제침강주연구소구조(Chlorella vulgaris)재표층불동광강작용하종향침강특성이급분포규률,위진일보료해수고중소구조적종향분포제공삼고。실험실배양적소구조안기직경가분위소우4.5μm、4.5~5.5μm、대우5.5μm 3개등급,불동립경적소구조재불동광강적작용하침속불동；실험조건하소구조적침속분포재0.1~468.2μm/s,균치위32.8μm/s；소구조적침강속도수침강주표층광강증강이강저,무광상태하시침속시표층광강위10000 lx적2~3배；소구조직경대소여침속정정상관,직경4.5~5.5μm적소구조침속시3.5~4.5μm적5~6배；침강은정후실험주중소구조종표층지저층립경축점변대,제저층외소구조재종향봉치수광강증가이향하연신,여실험주표층광강위1000 lx화4000 lx시소구조봉치출현실험주표층,이표층광강위7000 lx화10000 lx적실험봉치분별출현재수하300 mm화600 mm처。
Vertical migration and distribution law in Chlorella vulgaris were observed and determined in inducing effect of different light intensity by homemade settling column, which provided support for comprehending longitudinal distribution of the reservoir C.vulgaris. C.vulgaris cultured in the laboratory was divided into three level in according with the particle diameter size: < 4.5 μm, 4.5~5.5 μm and > 5.5 μm . The settling velocity range of C.vulgaris which had different particle size was different in inducing effect of different light intensity. The settling velocity range of C.vulgaris was 0.1~468.2 μm/s with an average value of 32.8 μm/s under the experimental conditions. Settling velocity was getting slower with increase of light intensity. When light intensity reaches 10000 lx, the settling velocity and matt stated a difference of about 2 to 3 times. The particle size of C.vulgaris were positively correlated with settling velocity. The settling velocity of 4.5~5.5μm group was 5 to 6 times higher than 3.5~4.5μm groupbig;After settlement, The particle size distribution from the surface to the bottom became bigger gradually. The longitudinal peak of C.vulgaris are stretching downward with light intensity enhance except the bottom. For example, the maximum value was obtained at the surface when the light intensity was 1000 and 4000 lx., while maximum value was obtained 300 and 600 mm below the surface when the light intensity was 7000 and 10000 lx, respectively.
