高氏瘤粉虱及其天敌的生态位

通过对高氏瘤粉虱及其天敌时间生态位和空间生态位的调查，测定了生态位宽度、重叠和比例相似性，在此基础上，构建时空二维生态位，并分析了高氏瘤粉虱及其天敌空间上的同域性和时间上的同步性，即时间和空间上的“跟随”作用。结果表明：在自然环境中寄生性天敌对高氏瘤粉虱的控制作用强；捕食性天敌对高氏瘤粉虱控制作用不大；害生性天敌桨角蚜小蜂与高氏瘤粉虱在时间上的同步性和空间上的同域性均优于其它天敌，为优势天敌，应加以保护和利用。

Niches of Aleurotuberculatus takahashi and its Natural Enemies

The niche breadth, overlap and the proportional similarity of Aleurotuberculatus takahashi and its natural enemies were estimated by means of investigating their singledimensional temporal niches and spatial niches. Based on this, the two dimensional niches of time and space niches were constructed. Meanwhile the sympatry and synchrony between pest and its natural enemies were analyzed. The effect of the natural enemies were assessed according to the analysis, which revealed that the parasitoids played a more significant role than the predators, and that Eretmocerus sp. which had the closest synchrony and sympatry with Aleurotuberculatus takahashi, should be considered as a dominant natural enemy, and be protected and utilized to control Aleurotuberculatus takahashi.