海拔梯度变化对黄缘蜾蠃筑巢结构及相关生物学特性的影响

黄缘蜾蠃(Anterhynchium flavomarginatum)是一种以鳞翅目幼虫为食的独栖性捕食昆虫，在生态系统中提供了重要的生物防治功能。2018—2019年，在广东车八岭国家级自然保护区通过人工巢穴收集了不同海拔梯度下(332—1007 m)该蜂的筑巢巢管，系统研究了黄缘蜾蠃的筑巢特征(巢管内径、巢室长度、巢室数量)以及该蜂的子代雌雄数和体型大小随海拔梯度的变化趋势。结果表明：海拔主要影响的是黄缘蜾蠃对巢管内径大小的选择，以及对前庭长度的分配，同时，黄缘蜾蠃对巢管内径的选择可以影响到后代性别比，这种策略主要体现在亲本对雌性子代的投资，而不是雄性子代。研究结果表明黄缘蜾蠃在不同海拔梯度下可根据外界环境压力调整其营巢和生殖策略，以提高种群对环境的适应性。

Effects of altitude gradient changes on nesting and biology for the potter wasp Anterhynchium flavomarginatum (Hymenoptera: Vespidae: Eumeninae)

Anterhynchium flavomarginatum is an important solitary predator insect and has crucial biological control functions in the ecosystem, which feeds on lepidopteran larvae. From 2018 to 2019, we collected the A. flavomarginatum by artificial nests in the Guangdong Chebaling National Nature Reserve, to study its nest characteristics (inner diameter of nest, cell length of nest, and the number of cells in nest), the number of each sex among its offspring, and its body size under different altitude gradients (332-1007 m). The results showed that altitude mainly affected the selection of the inner diameter of nest, and the allocation of the length of the vestibular. In addition, the selection of the inner diameter of nest could affect the sex ratio of the offspring, which was mainly reflected in the investment of the parents to the female offspring rather than the male. Our study concluded that A. flavomarginatum can adjust its nesting and reproductive strategy according to the external environmental pressure, in order to improve its fitness for the environment.