生物学杂志
生物學雜誌
생물학잡지
JOURNAL OF BIOLOGY
2014年
3期
20-24,28
,共6页
长江口北支%浮游植物%周年变化
長江口北支%浮遊植物%週年變化
장강구북지%부유식물%주년변화
north branch of the Yangtze River estuary%phytoplankton%annual variation
2010年10月至2011年9月对长江口北支水域的浮游植物进行周年调查,共采集到183种(包括变种和变型),隶属于7门60属,其中硅藻门种类最多,有35属137种,占浮游植物总种类数的75%。周年优势种为具槽直链藻、中肋骨条藻、条纹小环藻、两栖颤藻、小伪菱形藻双楔变种、颗粒直链藻和小环藻未定种。本次调查中,季节间浮游植物的丰度差异不显著(P>0.05),但各月间浮游植物丰度差异显著(P<0.05),全年丰度在2.83×103~6.18×104cells/L之间,其中6月的丰度最高,1月的丰度最低,全年的平均丰度为1.73×104cells/L。 Pearson相关性分析显示,浮游植物丰度与硝酸盐浓度显著正相关(P<0.05),与氨氮浓度极显著正相关(P<0.01),含氮营养盐对浮游植物的影响明显。
2010年10月至2011年9月對長江口北支水域的浮遊植物進行週年調查,共採集到183種(包括變種和變型),隸屬于7門60屬,其中硅藻門種類最多,有35屬137種,佔浮遊植物總種類數的75%。週年優勢種為具槽直鏈藻、中肋骨條藻、條紋小環藻、兩棲顫藻、小偽蔆形藻雙楔變種、顆粒直鏈藻和小環藻未定種。本次調查中,季節間浮遊植物的豐度差異不顯著(P>0.05),但各月間浮遊植物豐度差異顯著(P<0.05),全年豐度在2.83×103~6.18×104cells/L之間,其中6月的豐度最高,1月的豐度最低,全年的平均豐度為1.73×104cells/L。 Pearson相關性分析顯示,浮遊植物豐度與硝痠鹽濃度顯著正相關(P<0.05),與氨氮濃度極顯著正相關(P<0.01),含氮營養鹽對浮遊植物的影響明顯。
2010년10월지2011년9월대장강구북지수역적부유식물진행주년조사,공채집도183충(포괄변충화변형),대속우7문60속,기중규조문충류최다,유35속137충,점부유식물총충류수적75%。주년우세충위구조직련조、중륵골조조、조문소배조、량서전조、소위릉형조쌍설변충、과립직련조화소배조미정충。본차조사중,계절간부유식물적봉도차이불현저(P>0.05),단각월간부유식물봉도차이현저(P<0.05),전년봉도재2.83×103~6.18×104cells/L지간,기중6월적봉도최고,1월적봉도최저,전년적평균봉도위1.73×104cells/L。 Pearson상관성분석현시,부유식물봉도여초산염농도현저정상관(P<0.05),여안담농도겁현저정상관(P<0.01),함담영양염대부유식물적영향명현。
An annual survey was conducted on the community structure of phytoplankton from October 2010 to September 2011 at 5 sta-tions in the north branch of the Yangtze River estuary .A total of 183 phytoplankton species were identified , which belonged to 60 gene-ra of 7 phyla.Diatom was the major phytoplankton group which was 137 species of 35 genera and its species number accounted for 75%of all species .Melosira sulcata, Skeletonema costatum, Cyclotella striata, Oscillatoria amphibia, Pseudo-Nitzschia sicula v.Bicu-neata, Cyclotella sp.and Melosira granulata were the dominant species .Phytoplankton abundance difference was not significant among seasons ( p>0.05 ) , but monthly difference was significant ( p<0.05 ) .Phytoplankton density ranged from 2.83 ×10 3 to 6.18 ×10 4 cells/L with the nighest density in June and the lowest density in January .The annual average abundance was 1.73 10 4 cells/L.Corre-lation analysis found that the density of phytoplankton was significantly positively correlated to nitrate and ammonia .The impact of ni-trogenous nutrients for phytoplankton was significantly .