Silica-scaled Chrysophytes In Five National Wetland Reserve Of Heilongjiang Province

Silica-scaled chrysophytes was the most important part of phytoplankton. Cell often covered with siliced scales and bristles. It mainly occurred in freshwater. This paper researched silica-scaled chrsophtes in Five National Wetland Reserve of Heilongjiang Province, included that characteristic of silica-scaled chrysophtes, description of silica-sacled chrysophytes species, biogeography of silica-scaled chrysophytes, TWTNSPAN analysis of silica-scaled chrysophytes and relation of silica-scaled chrysophytes and water chemistry. The results suggested that54species were found in Five National Wetland Preserve of Heilongjiang Province. Mallomonas speices have37, account to68.52%; Synura species have11, account to20.37%, Paraphysomonas only have6, account to11.11%. And we found1new species and17new records for China. The new species is M. asymmetrica, and new records included that Ch. longispina、S.serrata、M. ouradion、M. transsylvanica、M.actinoloma、M. cristata、 M. leboimei、M. zellensis、M. lelymene、M. clavus, M.eoa, M. serrata, M. phasma、 S. petersenii f. kufferathii, S. leptorrhabda,S. punctulosa S. lapponica。 Wei Yinxin has ever found eight species in other place, Chrysosphaerella longispina, S.lapponica; M. ouradion, M. lelymene, M. eoa, M. actinoloma, Synura petersenu f. kufferathii, S. leptorrhabda, but her still published them in journal.These species have different distributed types, including31widely distributed, accuount to57.41%;10cosmoplitian, account to18.52%;6northern temperate, account to11.11%;3bipolar and4endemic species.Twinspan analysis suggested that silica-scaled chrysophtes can indicate to different water quality, especially S. punctulosa and M.alpina were the indictors of pH and water quality. And CCA analysis suggested that Cond, Temperature, Cl-were the main factors, while pH and chl-a was not. CCA analysis accorded to Twinspan analysis.