CAJ | 학술논문

于2006年11月,2007年2月、5月和8月,分别采集嘉陵江下游8个采样点藻类样品,分析其硅藻群落结构及物种多样性,并利用物种多样性指数及硅藻商等对水质进行了生物学评价.结果表明:(1)共发现89种硅藻,硅藻细胞密度变幅为0.57×10~4-51×10~4ind/L,总平均2.31×104ind/L;多样性指数值变幅为0.72-3.12,总平均2.20;均匀度指数值变幅为0.15-0.52,总平均0.36;硅藻商变幅为0.66-9.48,总平均3.24.(2)硅藻群落结构呈现出季节和水平分布上的变化.在季节变化上,物种丰富度、细胞密度及多样性指数等以温度较低的春(5月)、秋(11月)两季最高,而以夏季(8月)最低.在水平分布上,从上游到下游,硅藻群落结构呈现出物种丰富度、多样性指数值逐渐减小,而细胞密度和硅藻商逐渐增加的趋势.(3)嘉陵江下游水质总体为β-中污水体.其中位于城市上游的云门、沙溪、温塘峡、井口水质较好,为微污或β-中污水体,而位于城区及下游的合川、毛背沱、磁器口和朝天门水质较差,为α-中污或污染水体.
우2006년11월,2007년2월、5월화8월,분별채집가릉강하유8개채양점조류양품,분석기규조군락결구급물충다양성,병이용물충다양성지수급규조상등대수질진행료생물학평개.결과표명:(1)공발현89충규조,규조세포밀도변폭위0.57×10~4-51×10~4ind/L,총평균2.31×104ind/L;다양성지수치변폭위0.72-3.12,총평균2.20;균균도지수치변폭위0.15-0.52,총평균0.36;규조상변폭위0.66-9.48,총평균3.24.(2)규조군락결구정현출계절화수평분포상적변화.재계절변화상,물충봉부도、세포밀도급다양성지수등이온도교저적춘(5월)、추(11월)량계최고,이이하계(8월)최저.재수평분포상,종상유도하유,규조군락결구정현출물충봉부도、다양성지수치축점감소,이세포밀도화규조상축점증가적추세.(3)가릉강하유수질총체위β-중오수체.기중위우성시상유적운문、사계、온당협、정구수질교호,위미오혹β-중오수체,이위우성구급하유적합천、모배타、자기구화조천문수질교차,위α-중오혹오염수체.
To study the community structure and species diversity of diatom in downstream of Jialing River, 8 diatom samples were collected according to normal methods, in October, 2006, February, May, and December, 2007, respectively. Diatom species numbers, cell density, diversity index, evenness index and diatom quotient were studied as well as water quality was analysed according to diversity index and diatom quotient. The results showed that: (1) 89 taxa, which belonged to 2 class, 11 family and 22 genera, were observed (including variety and form). Pennatae diatom species richness were higher than that of centriate diatom; The cell densities of diatom was in the range of 0.57×10~4-4.51×10~4 ind/L with the mean value of 2.31×10~4ind/L; The diversity index was in the range of 0.72-3.12 with the mean value of 2.20; The evenness index was in the range of 0.15-0.52 with the mean value of 0.36; The diatom quotient was in the range of 0.66-9.48 with the mean value of 3.24. Compared with Daning River, Hart River, Yangtze River, and so on,diatom community structure in downstream of Jialing River took on higher species richness and diversity and lower cell density. (2) The diatom community structure took on noticeable seasonal and horizontal distribution distinction. To seasonal change, Spring (Feb., 2008) and Autumn (May, 2008) had higher species richness, cell densities, diversity indices than those in Summer (Aug., 2008). To horizontal distribution change, from upstream to downstream, the diatom species richness and diversity indices declined gradually, however, cell densities and diatom quotient increased gradually. (3) The water quality in downstream of Jialing River belonged to β-mesosaprobic Zone totally. The water quality of the sampling sites in upstream city was better than those in downstream city. The water quality ofYM, SX, WTX and JK was better, which belonged to β-mesosaprobie Zone or Oligosaprobid Zone; Those of HC, MBT, CQK and CTM belonged to α-mesosaprobic Zone or Polysaprobic Zone.