CNRS - UMR 8172 Ecofog, écologie des forêts de Guyane, campus agronomique, BP 709, 97387 Kourou cedex, France.
C R Biol. 2010 Jan;333(1):35-40. doi: 10.1016/j.crvi.2009.10.007. Epub 2010 Jan 20.
After noting the forecast of a La Niña episode, associated with heavy rainfall in French Guiana, we monitored the fate of wasp nests before and during the 2006 short rainy season. The population of the most abundant epiponine wasp species, Polybia bistriata, decreased dramatically during the short rainy season (60.6% of the nests disappeared) then remained low for at least 18 months. Colonies that survived moved from the shelter of large, low leaves (a situation well adapted to the previous dry season) of the most frequent substrate tree, Clusia grandiflora (Clusiaceae), to upper leaves, better ventilated and whose orientation provides good protection from the rain. Therefore, the possibility of moving the nest higher during the first rains following the dry season seems very adaptive as colonies that do not do so are eliminated during the La Niña years, whose frequency will increase with global climate change.
注意到拉尼娜现象的预测后，与法属圭亚那的强降雨有关，我们监测了黄蜂巢在 2006 年短雨季前后的命运。在短雨季期间（60.6%的巢穴消失），最丰富的 epiponine 黄蜂物种 Polybia bistriata 的数量急剧减少，然后至少在 18 个月内保持较低水平。幸存下来的殖民地从最常见的基质树种 Clusia grandiflora（Clusiaceae）的大而低的叶子（非常适合前一个旱季的情况）的庇护所转移到了通风更好的上部叶子，其方向可以很好地防止雨水。因此，在旱季后的第一场雨时将巢穴移到更高处的可能性似乎非常适应，因为在拉尼娜年期间，那些不这样做的殖民地将被淘汰，而随着全球气候变化，拉尼娜年的频率将会增加。
