Replication Data for: Increased snow and cold season temperatures alter High Arctic parasitic fungi - host plant interactions.

Dataset for Moriana-Armendariz et al. 2021- Increased snow and cold season temperatures alter High Arctic parasitic fungi - host plant interactions. In the Arctic, fungal mycelial growth takes place mainly during the cold-season and beginning of growing season. Climate change induced increases of cold-season temperatures may, hence, benefit fungal growth and increase their abundance. This is of special importance for parasitic fungi, which may significantly shape Arctic vegetation composition. Here, we studied two contrasting plant parasitic fungi’s occurrences (biotrophic Exobasidium hypogenum on vascular plant Cassiope tetragona, and necrotrophic Pythium polare on moss Sanionia uncinata) in response to increased snow depth, a method primarily used to increase cold-season temperatures, after 7-13 years of snow manipulation in Adventdalen, Svalbard. We show that enhanced snow depth increased occurrences of both fungi tested here, and indicate that increased fungal infections of host plants were at least partly responsible for decreases of host occurrences. While bryophyte growth in general may be influenced by increased soil moisture and reduced competition from vascular plants, Pythium is likely enhanced by the combination of milder winter temperatures and moister environment provided by the snow. The relationships between host plants and fungal infection indicate ongoing processes involved in the dynamics of compositional adjustment to changing climate.

Moriana-Armendariz 等人于 2021 年发布的《增温季节与冷季温度上升对北极地区寄生真菌与宿主植物相互作用的影响》数据集。在北极地区，真菌菌丝生长主要发生在冷季及生长季初期。因此，气候变化引起的冷季温度上升可能有利于真菌的生长，进而增加其丰度。这对于寄生真菌尤为重要，因为它们可能显著塑造北极植被的组成。在本研究中，我们探讨了两种对比鲜明的植物寄生真菌（生物营养型 Exobasidium hypogenum，寄生于维管植物 Cassiope tetragona，以及坏死营养型 Pythium polare，寄生于苔藓 Sanionia uncinata）在增加积雪深度（一种主要用于提升冷季温度的方法）后的发生情况，该研究在斯瓦尔巴的 Adventdalen 经过 7-13 年的积雪操作。结果显示，增深的积雪提高了两种测试真菌的发生率，并表明宿主植物感染的增强至少部分地导致了宿主植物发生率的下降。尽管苔藓的生长总体上可能受到增加的土壤湿度和减少的维管植物竞争的影响，但 Pythium 的增强可能得益于冬季温度的变温和积雪提供的湿润环境。宿主植物与真菌感染之间的关系揭示了涉及成分调整动态变化中的持续过程，这些调整是对气候变化的一种响应。