Winter warming pulses differently affect plant performance in temperate heathland and grassland communities
Winter warming pulses differently affect plant performance in temperate heathland and grassland communities
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冬季变暖脉冲对温带石南地和草原群落的植物性能产生不同的影响
DOI：
10.1007/s11284-014-1174-x
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发表时间：
2014
影响因子：
2
通讯作者：
Kreyling J
中科院分区：
文献类型：
--
作者：
Schürings J;Jentsch A;Kreyling J
预估温带冬季气温变率将增加，而积雪将减少，导致土壤温度变化更大。在田间试验中，施加冬季增温脉冲，对4种植物在随后的两个生长季节中单作和混合栽培的地上生物量和根长进行了量化。实验在两个地点进行了重复，一个是寒冷多雪的高地，另一个是温暖干燥的低地。增温脉冲处理后，黄颡鱼生长季地上生物量下降（- 29%）。它在草地混合物中的竞争对手车前草（Plantago lanceolata）通过增加生物量产量（+ 18%）从这种下降中获利。这些影响在第二年就消失了。p的生物量呈明显下降趋势。第二年，低洼地区出现了杉树。这两个物种在处理过程中叶片碳水化合物含量也有所下降。处理对石南种地上部生产力和碳水化合物含量没有影响。处理的地上效应在两个地点之间没有显着差异，从而暗示了不同温带生态系统在降雪量少和量大的情况下的一些普遍性。h处理后根长直接增加。在第一个生长季节结束时有一个高峰。观察到的物种特异性效应强调了温带冬季温度变化的生态重要性，并且对群落组成和生态系统生产力的潜在变化似乎很重要。
Winter air temperature variability is projected to increase in the temperate zone whereas snow cover is projected to decrease, leading to more variable soil temperatures. In a field experiment winter warming pulses were applied and aboveground biomass and root length of four plant species were quantified over two subsequent growing seasons in monocultures and mixtures of two species. The experiment was replicated at two sites, a colder upland site with more snow and a warmer, dryer lowland site. Aboveground biomass ofHolcus lanatusdeclined (−29 %) in the growing season after the warming pulse treatment. Its competitor in the grassland mixture,Plantago lanceolata, profited from this decline by increased biomass production (+18 %). These effects disappeared in the second year. There was a strong decline in biomass forP. lanceolataat the lowland site in the second year. These two species also showed a decline in leaf carbohydrate content during the manipulation. Aboveground productivity and carbohydrate content of the heathland species was not affected by the treatment. The aboveground effects of the treatment did not differ significantly between the two sites, thereby implying some generality for different temperate ecosystems with little and significant amount of snowfall. Root length increased directly after the treatment forH. lanatusand forCalluna vulgariswith a peak at the end of the first growing season. The observed species-specific effects emphasize the ecological importance of winter temperature variability in the temperate zone and appear important for potential shifts in community composition and ecosystem productivity.
影响因子：
1.1
作者：
Kreyling, Juergen;Henry, Hugh A. L.
通讯作者：
Henry, Hugh A. L.
冬季变暖脉冲影响人工温带草原和矮灌木石南群落的发展
影响因子：
1.5
作者：
J. Kreyling;G. Jurasinski;Kerstin Grant;V. Retzer;A. Jentsch;C. Beierkuhnlein
通讯作者：
C. Beierkuhnlein