中文摘要：

于2010-2013年的繁殖季节,在中国科学院海北高寒草甸生态系统定位站收集了9种青藏高原常见雀形目鸟类的卵,分别进行了反射率测量。测量光谱范围为可见光（400-750 nm）和短波近红外（750-1050 nm）。卵在两个波段光谱的反射率分别是0.066和0.123,二者差异极显著。在可见光范围内,除赭红尾鸲Phoenicurus ochruros的波峰在绿色光范围内,其他物种都在黄色光范围内;在短波近红外范围内,反射率明显分为3个组,以角百灵和小云雀的地面开放巢较高,黄嘴朱顶雀和黄腹柳莺的灌丛巢较低,其他种居中;开放巢及封闭巢的卵反射率在可见光范围无显著差异,但在短波近红外范围有显著差异。我们认为,在青藏高原高寒草甸生态系统中,植被郁闭度低,地面营巢环境不利于巢与卵的遮阳,造成营开放度高的地面巢的鸟卵近红外反射率相对较高,而灌丛巢和封闭巢的雀形目鸟类鸟卵相对较低,但对可见光谱的卵反射率各物种差异不显著。

英文摘要：

To explore the potential relevance between egg coloration and incubation temperature in breeding seasons of Passeriformes, from 2010 to 2013, eggs of 9 species of Passeriformes were collected from alpine meadow and the egg reflec- tance were measured, respectively. The spectral range were 400- 750 nm （visible light） and 750- 1050 nm （near infrared spectrum）. The mean egg reflectance in the two spectral range were 0. 066 and 0. 123, and the NIR reflectance was significantly different from the visible light reflectance, indicated that the heat control mechanism of eggshell is favored by passerines nesting in alpine meadow. Significant difference was also found in egg reflectance in the NIR range of different nest types, but not in the visible light range, suggesting different nest environments affected incubation temperature differently. Resuhs also indicated no significant difference in egg color among 8 species except black redstart （Phoenicurus ochruros ）, suggesting predation pressure drived selection of crypsis eggshell coloration; but from the perspective of thermoregulation, there was significant difference in the NIR reflectance, which explained the breeding ecology in the alpine meadow favored plain but thermoregulatable eggshell colours instead of conspicuous ones.