泰山侧柏林柏小爪螨及其天敌生态位研究

Study of the Niches of Oligonychus Perditus and its Predatory Enemies in the Platycladus Orientialis Forest of Taishan Mountain

在对侧柏林柏小爪螨及其捕食性天敌进行系统调查的基础上,研究了柏小爪螨及其主要捕食性天敌的时空生态位。结果表明,柏小爪螨的空间生态位宽度较大(0.6298),时间生态位宽度较小(0.4182),时间和空间生态位宽度更小(0.2634)。捕食性天敌优势种中小花蝽的空间生态位宽度最大(0.8172),圆果大赤螨的时间生态位宽度最大(0.7115),龟纹瓢虫的时-空二维生态位宽度最大(0.6906),深点食螨瓢虫与柏小爪螨的时间×空间生态位重叠度最大(0.8729),其次为苏氏盲走螨(0.7596),说明这两种天敌对柏小爪螨的跟随作用较强。

Based on a systematic investigation on Oligonychus Perditus and its predatory enemies in the Platycladus orientialis forest of Taishan Mountain. The temporal and spatial niche breadth of O. Perditus and its major predatory enemies were studied in this paper. The study showed that the spatial niche breadth of O. Perditus was 0.629 8, the temporal niche breadth was 0.418 2, the temporal and spatial niche breadth were very narrow （0.263 4）. Among the dominant predatory enemies, Orius minutus （Linnaeus） had the widest spatial niche breadth （0.817 2）, Anystis baccarum （Linnaeus） had the widest temporal niche breadth （0.711 5）, Propylaea japonica （Thunberg） had the widest temporal and spatial niche breadth. The time xspace niches overlap of Stethorus punctillum Weise and O. Perditus was the greatest. Typhhlod romus soleiger Ptitichatd et Baker secondly （0.759 6）, which implied that the above two species of predatory enemies had better follow effects on O. Perditus.