Livestock heat stress threatens production, particularly in semi-arid, arid and tropical regions. Using established temperature thresholds for sheep, we modelled +1 °C and +3 °C temperature increases over the historical baseline, estimating that 2.1 million potential lambs are lost annually due to heat stress alone, increasing to 2.5 and 3.3 million, respectively, as temperatures rise. Heat stress poses risks at key periods of the reproductive cycle, with consequences across the Australian sheep flock.

中文翻译：

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当前和预计气温升高带来的热应激会影响澳大利亚羊群的产羔率和出生体重

牲畜热应激威胁着生产，特别是在半干旱、干旱和热带地区。使用既定的绵羊温度阈值，我们模拟了相对于历史基线+1°C 和+3°C 的温度升高，估计每年仅由于热应激就可能损失 210 万只羔羊，分别增加到 2.5 和 330 万只，如下：温度升高。热应激在繁殖周期的关键时期带来风险，并对整个澳大利亚羊群产生影响。