The effects of climate change during the Terminal Pleistocene–Early Holocene transition on ecosystems and early Prearchaic hunter‐gatherers in the central Great Basin of North America are not well understood. We present a palynological reconstruction of regional vegetation and fire history in Grass Valley, central Nevada, from ~14 to ~7.5k cal a BP showing that Pinus‐dominated woodlands were replaced by dry‐adapted steppe and desert vegetation accompanied by an increase in regional fire activity at the beginning of the Holocene, in response to summer warming and a drying climate. Following a severe drought period peaking ~10.2–9.3k cal a BP, Pinus woodlands partially recovered contemporaneously with the 8.2k cal a BP climate anomaly. Local wetlands provided important resource patches for human foraging societies, and periodic declines of wetlands in response to changing local hydrological conditions may have necessitated adjustments in subsistence and settlement practices and technology.

中文翻译：

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美国大盆地中部更新世-全新世气候变化对植被和火灾动态的影响及其对前古人类的影响

北美大盆地中部的晚更新世-早全新世过渡期间的气候变化对生态系统和早期前古猎人-采集者的影响尚不清楚。我们提出了内华达州中部草谷地区从约14到约7.5k cal的区域植被和火史的孢粉重建，显示以松树为主的林地被适应于干旱的草原和沙漠植被所取代，伴随着区域面积的增加响应于夏季变暖和干燥气候，在全新世初期发生了火警活动。在严重的干旱期之后，松树顶峰BP的峰值约为〜10.2–9.3k8.2 k cal BP气候异常同时恢复了部分林地。当地的湿地为人类觅食社会提供了重要的资源斑块，而湿地由于当地水文条件不断变化而周期性下降，可能需要对生存和定居实践及技术进行调整。