Miao Yong, Zou Yunding, Sun Shanjiao, Ye Chengrui, Li Taochun, Ye Shilu, Xing Jianguo
Anhui Agricultural University, Hefei 230036, China.
Ying Yong Sheng Tai Xue Bao. 2003 Apr;14(4):549-52.
The research results showed that Aphis gossypii had a narrow temporal niche breadth and a wide spatial niche breadth. This implied that the occurrence of A. gossypii population had the characteristics of obvious peak-period and whole-plant damage. The temporal-dynamic spatial niche breadthes of A. gossypii had no relativity to its own population densities. This implied that the damage of A. gossypii was complicated. Among the predatory enemies, Erigonidium graminicola and Propylaea japonica had wider temporal and spatial niche breadthes than other predatory enemies, and it meant that the above two enemies had longer period of occurrence and wider range of distribution. The temporal x spatial niche overlap of the predatory enemies with A. gossypii was in order of Theridium octomaculatum > P. japonica > E. graminicola > total of other enemies > Geocoris ochropterus > Misumenops tricuspidatus > Orius minutes, and the other was consistent with that of relational grades of A. gossypii and its predatory enemy populations. This result showed that the sympatry and synchronism of predatory enemies with A. gossypii had close relation to the predatory effect of the natural enemies.
研究结果表明，棉蚜的时间生态位宽度较窄，空间生态位宽度较宽。这意味着棉蚜种群的发生具有明显的高峰期和全株危害的特点。棉蚜的时间动态空间生态位宽度与其自身种群密度无关。这意味着棉蚜的危害较为复杂。在捕食性天敌中，草间小黑蛛和龟纹瓢虫的时间和空间生态位宽度比其他捕食性天敌宽，这意味着上述两种天敌的发生期较长，分布范围较广。捕食性天敌与棉蚜的时间×空间生态位重叠顺序为八斑球腹蛛＞龟纹瓢虫＞草间小黑蛛＞其他天敌总数＞黄足猎蝽＞三突花蛛＞小花蝽，另一个与棉蚜及其捕食性天敌种群的关联等级一致。这一结果表明，捕食性天敌与棉蚜的同域性和同步性与天敌的捕食效果密切相关。
