The relevance of forests in mitigating biodiversity loss and the negative effects of climate change on the biota is largely shaped by below-canopy microclimatic conditions, which are buffered, cooler and more humid compared to adjoining open habitats. Water-filled tree holes (dendrotelms, DTs) are special tree-related microhabitats that host semi-aquatic communities and are important substrates or water sources for numerous taxa (e.g., birds, mammals, insects, fungi, bryophytes). Despite their microrefugia-role might be more pronounced under climate change-induced drought events, little is known about their microclimate and its potential drivers.

中文翻译：

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树冠下的小绿洲：充满水的树洞对橡树为主的林地局部小气候的冷却作用


森林在减轻生物多样性丧失和气候变化对生物群的负面影响方面的相关性很大程度上取决于树冠以下的小气候条件，与毗邻的开放栖息地相比，这些条件具有缓冲性、凉爽性和湿润性。充满水的树洞（dendrotelms，DT）是与树木相关的特殊微生境，是半水生群落的栖息地，是许多类群（例如鸟类、哺乳动物、昆虫、真菌、苔藓植物）的重要基质或水源。尽管在气候变化引起的干旱事件下，它们的微避难所作用可能更加明显，但人们对它们的微气候及其潜在驱动因素知之甚少。