CAJ | 학술논문

在亚热带浅水湖泊中，由风浪引起沉积物再悬浮是其重要特征之一.沉积物再悬浮一方面直接影响浮游动物群落结构，另一方面通过影响食浮游动物鱼类对浮游动物的捕食而产生间接影响.以食浮游动物鱼类———餐条( Hemiculter leucisculus)为实验对象，通过模拟实验，比较不同再悬浮条件下餐条对浮游动物群落结构的影响.结果显示，在有餐条的处理组中，大型枝角类短钝溞( Daphnia obtusa)只在弱再悬浮条件下出现，并成为枝角类群落的优势种；在无餐条的处理组中，短钝溞生物量随再悬浮强度减弱而增加.强再悬浮(无餐条)和无再悬浮(有餐条)条件下，小型枝角类角突网纹溞( Ceriodaphnia cornuta)和盘肠溞( Chydorus sp.)为优势种.无论有、无餐条条件下，桡足类优势种均为中剑水蚤( Mesocyclops sp.)，其生物量随再悬浮强度减弱而增加.所有处理组中，轮虫丰度均低于枝角类和桡足类丰度.研究表明，在亚热带浅水湖泊中，适当的悬浮质浓度既能干扰食浮游动物鱼类对大型浮游动物的捕食，又不影响大型浮游动物的生存，使得它们保持一定的丰度，通过对浮游植物的摄食，降低叶绿素a浓度.
재아열대천수호박중，유풍랑인기침적물재현부시기중요특정지일.침적물재현부일방면직접영향부유동물군락결구，령일방면통과영향식부유동물어류대부유동물적포식이산생간접영향.이식부유동물어류———찬조( Hemiculter leucisculus)위실험대상，통과모의실험，비교불동재현부조건하찬조대부유동물군락결구적영향.결과현시，재유찬조적처리조중，대형지각류단둔소( Daphnia obtusa)지재약재현부조건하출현，병성위지각류군락적우세충；재무찬조적처리조중，단둔소생물량수재현부강도감약이증가.강재현부(무찬조)화무재현부(유찬조)조건하，소형지각류각돌망문소( Ceriodaphnia cornuta)화반장소( Chydorus sp.)위우세충.무론유、무찬조조건하，뇨족류우세충균위중검수조( Mesocyclops sp.)，기생물량수재현부강도감약이증가.소유처리조중，륜충봉도균저우지각류화뇨족류봉도.연구표명，재아열대천수호박중，괄당적현부질농도기능간우식부유동물어류대대형부유동물적포식，우불영향대형부유동물적생존，사득타문보지일정적봉도，통과대부유식물적섭식，강저협록소a농도.
Sediment resuspension resulted from wave actions is one of the major characters of subtropical shallow lakes. Resuspen-sion can directly alter the zooplankton community structures, and indirectly influence the predation of planktivorous fishes. Our study aimed to reveal how planktivorous fish Hemiculter leucisculus affected the zooplankton community structures in different levels of sediment resuspension. The results showed that in the condition of H. leucisculus, large-sized cladoceran Daphnia obtusa was on-ly found and became dominant in the treatment of weak resuspension. Biomass of D. obtusa decreased with the increase of resus-pension intensity in treatments without H. leucisculus and Chydorus sp. . The Ceriodaphnia cornuta dominated the cladoceran com-munities in the treatments of strong resuspension without H. leucisculus or no resuspension with H. leucisculus. Regardless of fish and resuspension intensity, Mesocyclops sp. was dominant copepod and its biomass increased with the decrease of the resupension intensity. Rotifer abundances were lower than cladoceran and copepod in all treatments. This study indicates that in subtropical shallow lakes, a certain level of sediment resuspension can weaken both the predation of planktivorous fishes and resuspension effect on large-sized cladoceran, which can decrease the chlorophyll-a concentration through increasing the feeding of large-sized cladoceran on algae.