CAJ | 학술논문

2007年1-12月对淮河中游浮游甲壳动物群落结构的季节动态进行研究。共记录浮游甲壳动物24种,其中枝角类8属13种、桡足类9属11种。枝角类在4月和9月形成两个峰值,即(28.2±21.6) ind/L和(40.8±10.1) ind/L,溞其优势种分别为僧帽 Daphnia cucullata 溞和脆弱象鼻 Bosmina fatalis。捕食性桡足类-近邻剑水蚤Cyclops vicinus vicinus、广布中剑水蚤Mesocyclops leuckarti和台湾温剑水蚤Thermocyclops taihokuensis分别在4月、5月和6月形成较大的密度。汤匙华哲水蚤Sinocalanus dorrii和中华窄腹剑水蚤Limnoithona sinensis分别在5月和8月占优势。小型浮游植物(≤20μm)生物量在4月达到最大值,之后快速下降,而较大型浮游植物(＞20μm)生物量从4月上升,到7月达到最大值。典型冗余分析(RDA)显示,溞属Daphnia的仲春下降与捕食性桡足类(尤其是近邻剑水蚤)的摄食压力、浮游植物生物量的季节变化密切相关。
2007년1-12월대회하중유부유갑각동물군락결구적계절동태진행연구。공기록부유갑각동물24충,기중지각류8속13충、뇨족류9속11충。지각류재4월화9월형성량개봉치,즉(28.2±21.6) ind/L화(40.8±10.1) ind/L,소기우세충분별위승모 Daphnia cucullata 소화취약상비 Bosmina fatalis。포식성뇨족류-근린검수조Cyclops vicinus vicinus、엄포중검수조Mesocyclops leuckarti화태만온검수조Thermocyclops taihokuensis분별재4월、5월화6월형성교대적밀도。탕시화철수조Sinocalanus dorrii화중화착복검수조Limnoithona sinensis분별재5월화8월점우세。소형부유식물(≤20μm)생물량재4월체도최대치,지후쾌속하강,이교대형부유식물(＞20μm)생물량종4월상승,도7월체도최대치。전형용여분석(RDA)현시,소속Daphnia적중춘하강여포식성뇨족류(우기시근린검수조)적섭식압력、부유식물생물량적계절변화밀절상관。
Seasonal dynamics of community structure of crustacean zooplankton were studied throughout 2007. Twenty-four species were recorded, including eight genera and thirteen species for cladocerans and nine genera and eleven species for copepod. Two peaks of cladoceran density were observed in April and September, (28.2±21.6) ind./L and (40.8±10.1) ind./L, respectively. The dominant species were D. cucullata and B. fatalis, respectively. The predatory copepod were C. vicinus vicinus, M. leuckarti and T. Taihokuensis, and their peak densities occurred in April, May and June, respectively. The relationship between predatory copepod density and Daphnia density was significant (r=0.541, n=48, P<0.01). S. dorrii and L. sinensis were dominant species in May and August, respectively. The maximum edible phytoplankton (≤20 μm) biomass appeared in April and then declined rapidly, while inedible phytoplankton (>20 μm) biomass increased from April and peaked in July. Redundancy analysis (RDA) showed that mid-spring decline of Daphnia density was related to the feeding pressure of predatory copepod (especially C. vicinus vicinus) and seasonal variation of phytoplankton biomass.