Local soil temperature advances flowering phenology of Canada mayflower (Maianthemum canadense), with implications for climate change assessment.

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY
Richard B Primack, Selby Vaughn, Carina Terry
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Abstract

Local soil temperature has the potential to affect plant phenology, which is a key indicator of the biological effects of climate change. Many existing analyses, however, ignore local temperatures and focus only on temperature at larger scales measured by weather stations. Ignoring local temperature adds noise to analyses, creating the need for longer time series, and may also bias results. Over four years, we investigated the effects of local soil temperature, sun exposure, and soil depth on flowering phenology for 35 populations of Canada mayflower (Maianthemum canadense) in an 82-hectare mixed deciduous forest in Newton, Massachusetts (USA). Flowering dates varied by 5-7 days among sites. Soil temperatures varied by about 5 °C across sites before and during the flowering season. Among the populations, plants flowered earliest at sites with the warmest local climates-around one day earlier for each 1 °C warmer temperature. Sun exposure and soil depth did not affect flowering times. Differences in temperature and flowering times among sites were consistent over the four years of the study. In most other published phenology studies, spring wildflowers flower 2-5 days earlier for each 1 °C of warming of air temperatures. This study demonstrates that the effects of local temperature on phenology can be investigated over relatively short periods of time and that these effects may bias estimates of phenological responses to temperature that rely solely on temperature data from weather stations.

当地土壤温度对加拿大五月花(Maianthemum canadense)的开花物候有促进作用,对气候变化评估有指导意义。
土壤温度对植物物候有潜在的影响,而物候是反映气候变化生物效应的重要指标。然而,许多现有的分析忽略了当地的温度,而只关注气象站测量的更大尺度的温度。忽略局部温度会给分析增加噪音,需要更长的时间序列,还可能使结果产生偏差。在美国马萨诸塞州牛顿(Newton) 82公顷的混交林中,研究了当地土壤温度、日照和土壤深度对加拿大五月花(Maianthemum canadense) 35个种群开花物候的影响。花期在不同地点有5-7天的差异。在开花季节之前和期间,不同地点的土壤温度相差约5°C。在这些种群中,在当地气候最温暖的地方,植物开花最早——温度每升高1°C,植物开花时间就会提前一天左右。日照和土壤深度对开花时间没有影响。在四年的研究中,不同地点的温度和开花时间的差异是一致的。在大多数其他已发表的物候学研究中,气温每升高1°C,春季野花的开花时间就会提前2-5天。该研究表明,局部温度对物候的影响可以在相对较短的时间内进行调查,这些影响可能会影响仅依赖气象站温度数据的物候对温度响应的估计。
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来源期刊
Oecologia
Oecologia 环境科学-生态学
CiteScore
5.10
自引率
0.00%
发文量
192
审稿时长
5.3 months
期刊介绍: Oecologia publishes innovative ecological research of international interest. We seek reviews, advances in methodology, and original contributions, emphasizing the following areas: Population ecology, Plant-microbe-animal interactions, Ecosystem ecology, Community ecology, Global change ecology, Conservation ecology, Behavioral ecology and Physiological Ecology. In general, studies that are purely descriptive, mathematical, documentary, and/or natural history will not be considered.
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