Study On The Phytoplankton In The Main Lakes Of Arshaan National Geological Park

The mountain is located in the Sino Mongolian border, is located in the southwest of GreaterKhingan Range foothills, attached to the the Inner Mongolia Autonomous Region Xingan Meng,the cold temperate zone continental climate, the annual average temperature of-3.1℃, theaverage annual precipitation is460mm, cold and wet climate effect. The lake, swamp typemany,concentrated distribution, rich in biodiversity, have not been carried out studies on thecommunity structure of phytoplankton. The8lakes, this study selected the National GeologicalPark in Arxan representative sampling survey, set up a total of21samples of qualitative andquantitative research, composition, the lake phytoplankton species number, weight and biomass ofdominant species, widely distributed species and endemic species, using multivariate clusteringand algal biomass and dominant species comparative analysis of phytoplankton communitystructure in the lake, from the biomass, dominant species, diversity index, physical and chemicalindex and nutritional status of water quality status of each lake was evaluated. Has an importantreference significance on phytoplankton species and communities and environmental factorsrelated to research, also provide the basic data for the investigation and water environment in thearea of phytoplankton flora, has the instruction significance to the National Geological Park inArxan lake water environment protection. The results are as follows:The results showed that:2011there were246species phytoplankton, belonging to8phylaand80genera. The Chlorophyta (Chlorophyta) of46genera and156species of. Blue green algae(Cyanophyta),11genera and38species of Bacillariophyta (Bacillariophyta) of9genera and21species, Xanthophyta (Xanthophyta) of2genera and9species and1varieties, Chrysophyta(Chrysophyta) of4genera and9species, Cryptophyta (Cryptophyta),2genera and5species ofEuglenophyta (Euglenophyta) and2genera3kind of, Pyrrophyta (2genera and3species ofPyrrophyta). The lake phytoplankton species distribution and the frequency is not average, themain advantage of the lake phytoplankton species difference. Hump ridge Tianchi in the goldenalgae (Chromulina sp.) as the main species; Arxan Tianchi is mainly implicit algae (Aphanocapsadelicatissima), sharp tailed blue algae (Chroomonas acuta); dominant species pool for Chrysophyta (Chrysophyta), Bacillariophyta (Bacillariophyta) species; Dahl shore lake algae(Cyanophyta. Chroococcus minutus), Jin Zao (Chromulina sp.), horseshoe algae Chlorophyceaedoor (Kirchneriella contorta) higher dominance; Rhododendron lake formed the visibleAphanizomenon (Aphanizomenon flos-aquae) bloom; Lu Ming Hu Jiao dinoflagellates (Ceratiumhirundinella), Shu Sizao (Aphanizomenon flos-aquae) is the dominant species; Crane Lakeparticles Melosira pole a narrow variant (Melosira granulata var. angustissima), sharp tailed bluealgae (Chroomonas acuta) was the dominant species, Aphanizomenon Flos aquae(Aphanizomenonflos-aquae), Jiao Jiazao (Ceratium hirundinella) accounted for the largerproportion; the dominant species were chroococcus Wusu prodigal Lake (Chroococcus minutus),Jin Zao (Chromulina sp.). Through cluster analysis according to the species of phytoplankton,8lake is divided into four categories, the hump ridge Tianchi Tianchi belonging to the genusoligotrophic; eutrophication; Pine Lake, lake and pond Wusu prodigal son were a mesotrophictype; Rhododendron lake, Deer Lake, crane lake eutrophication degree is high.The2013identified215species of phytoplankton belonging to76genera,8door. TheChlorophyta (Chlorophyta) of45genera and127species of. Blue green algae (Cyanophyta),10genera and23species of Bacillariophyta (Bacillariophyta) of9genera and41species,Xanthophyta (Xanthophyta) of2genera and6species and1varieties, Chrysophyta (Chrysophyta)of4genera and7species, Cryptophyta (Chrysophyta),1genera and4species of Euglenophyta(Euglenophyta) and2genera3kind of, Pyrrophyta (2genera and3species of Pyrrophyta). Thespecies of phytoplankton in Lake Arxan national geological park than in2011decreased to acertain degree, differences in temporal and spatial distribution of community significantly. Thespatial difference is mainly caused by the different lake level of organic pollution, eutrophication,different types of lakes. Arxan Tianchi is mainly implicit algae (Aphanocapsa delicatissima),Trachelomonas (Trachelomonas sp.), fiber algae (Ankistrodemus sp.); to the pool fish algae(Mallomonas sp.), Bacillariophyta (Bacillariophyta) type was the dominant species in Binhu; Dahlthe main dominant species were chroococcus (Chroococcus minutus), pointed tail the alga(Chroomonas acuta), hoof shape algae (Kirchneriella lunaris), color golden algae (Chromulina sp.);dominant species of Rhododendron Lake as chroococcus (Chroococcus minutus), AphanizomenonFlos aquae (Aphanizomenonflos-aquae), Jiao Jiazao (Ceratium sp.); the main advantage of Luming lake for still angle dinoflagellates (Ceratium sp.) Crane Lake; angle Dinoflagellates(Ceratium hirundinella), Melosira granulata extremely narrow variants (Melosira granulata var.angustissima), as the main advantage; dominant species Wusu prodigal lake is an angulardinoflagellates (Ceratium sp.), chroococcus (Chroococcus minutus), Jin Zao (Chromulina sp.).Through two years of dominant species in the lake the lake with the advantages of multipleclustering degree can be roughly divided into four classes: class I have the hump ridge Tianchi,belonging to the cyanobacteria algae, diatoms, Golden Lake; class II including Arxan Tianchi,Dahl Binhu and Wusu prodigal lake, belonging to blue-green algae green algae type Ⅲ pool Lake;genus of diatoms, chrysophytes-type lakes; IV is the Rhododendron lake, Deer Lake and CraneLake, Lake blue-green algae dinoflagellate lake. Lake trophic types can be divided into fiveclasses: class I to the hump ridge Tianchi, belonging to the oligotrophic waters; class II Tianchi inArxan, Wusu prodigal lake belongs to the poor-mesotrophic water body; Ⅲ Dahl Binhu belongedto mesotrophic water body; IV is the pool is in eutrophic waters; V including Rhododendron Lake,Deer Lake, Crane Lake Lake three, belong to the rich and super eutrophic waters. The number ofphytoplankton in Arxan Lake National Geological Park mainly related with the water temperature,pH and dissolved oxygen were significant positive; Cl-and conductivity, salinity, TDS, pHpositively correlated with electrical conductivity, Na+, salinity, TDS had a very significantpositive correlation, COD, BOD, TOC and conductivity, salinity, TDS negatively correlation, TNwas significantly positive correlated with pH, DO, TP had significant positive correlation with pH.Asignificant correlation of phytoplankton biomass and water weight, pH and dissolved oxygen.