CAJ | 학술논문

依据2009年夏季和2010年春季东海北部及其邻近水域的底拖网渔业资源调查样品，利用稳定同位素生态位的方法分析该海域内主要游泳动物营养结构的季节变化，并根据δ13 C－δ15 N 的二维坐标计算了6个营养结构的量化指标。结果表明，东海北部及其邻近水域主要游泳动物的δ13 C值存在显著的季节差异（P＜0．05），δ15N值无显著差异（P＞0．05）；稳定同位素的量化指标结果表明，游泳动物群落的营养结构存在季节差异，与2009年夏季相比，2010年春季的δ15 N比值范围（NR）、δ13 C比值范围（CR）、面积（TA）、平均离心距离（CD）均有所升高，而最邻近距离平均值（NND）、最邻近距离标准差（SDNND）值相对持平或略有下降。本研究结果表明，东海北部及其邻近水域主要游泳动物营养结构的季节差异与群落内食源多样性水平和营养冗余程度的变化密切相关。
의거2009년하계화2010년춘계동해북부급기린근수역적저타망어업자원조사양품，이용은정동위소생태위적방법분석해해역내주요유영동물영양결구적계절변화，병근거δ13 C－δ15 N 적이유좌표계산료6개영양결구적양화지표。결과표명，동해북부급기린근수역주요유영동물적δ13 C치존재현저적계절차이（P＜0．05），δ15N치무현저차이（P＞0．05）；은정동위소적양화지표결과표명，유영동물군락적영양결구존재계절차이，여2009년하계상비，2010년춘계적δ15 N비치범위（NR）、δ13 C비치범위（CR）、면적（TA）、평균리심거리（CD）균유소승고，이최린근거리평균치（NND）、최린근거리표준차（SDNND）치상대지평혹략유하강。본연구결과표명，동해북부급기린근수역주요유영동물영양결구적계절차이여군락내식원다양성수평화영양용여정도적변화밀절상관。
Based on materials collected from large-scale surveys in the northern East China Sea and adjacent waters in the summer of 2009 and the spring of 2010 (29°-34°N,122°-127°E),the paper studied seasonal variations of the trophic structure of nekton organisms through analysis of stable isotopic contents.The isotopic niche defined as a position in the δ13 C-δ15 N planar was applied,and six quantitative metrics (ratio range ofδ15 N,NR;ratio range ofδ13 C,CR;area,TA;average distance of centroid,CD;the minimum mean,NND;the minimum standard deviation,SDNND)based on stable isotopic were calculated to show the trophic structure characteristics.The results showed that there were significant differences between δ13 C values of samples collected in two seasons,while no significant difference between δ15 N values was found.Trophic structure of nektons differed remarkably in the two sampling seasons inferred from six quantitative metrics. NR,CR,TA and CD were much higher in the spring of 2010 than those in the summer of 2009,while NND and SDNND were lower in the spring than those in the summer.The characteristics of data in this study demonstrates that there are high diversity of food resources and trophic redundancy in the nekton community in the northern East China Sea and adjacent waters.