之前在博客中分享过Methods in Ecology and Evolution上的一篇利用网络图片获取生态数据的学术论文（利用谷歌图片描述生物个体可见表型的地理分化）。这个杂志很有意思，最近又发现了这篇利用录像视频资料提取植物物候（长叶、开花）信息的文章，也是非常有意思。
植被中植物的物候是一个非常重要的基础数据，但之前历史上系统的相关记录比较少。The Tour of Flanders 是在比利时举办的一年一度的自行车公路赛，利用这些赛事录像记录，研究者可以得到每年（1981年到2016年）春季赛事举办时的是否长叶和开花的信息，研究发现物候提前，并和1-3月的平均温度、积温相关。
（PS：今天下午的政治课《中国马克思主义与当代》的授课老师SSM是我见过水平最低、三观最不正、灌水最多的政治老师，作为认真听讲、做笔记做多的同学之一，这老师的授课风格已经到了令我崩溃的程度。逻辑混乱、授课无主线、使用猎奇轶事和不实案例、敏感史料使用不当、妄加判断、歧视学生认知、预设学生观点、视角狭隘、绕弯子、无意义提问、戏化历史、视角片面、圆滑世故政治投机，我觉得所有的贬义词都可以用上，如果一个街头大爷这样谈论，我可以接受，但作为一个老师，在讲台上，侃侃而谈，令我发指，作为授课组组长，还自我感觉极其良好。当然，其他政治课的授课老师水平还是比较高的，学校里还是有一批水平很高我很钦佩的社科老师，但这种老师也不少见。吐槽完毕。）
摘要
- Predicting how the timing of cyclic life‐history events, such as leafing and flowering, respond to climate change is of paramount importance due to the cascading impacts of vegetation phenology on species and ecosystem fitness. However, progress of this field is hampered by the relative scarcity, and geographic and phylogenetic bias, of long‐term phenology datasets.
- By taking advantage of archived television video footage, we here developed an innovative tool using previously unexploited records to build long‐term datasets of phenological responses. To demonstrate the potential of this method, we worked with broadcast archives of sport events and focus on one of the most famous professional road cycling races world‐wide, the Tour of Flanders.
- After viewing >200 hr of film, we compiled 523 individual × year observations of leaf‐out and flowering of 46 individual trees and shrubs visible in four decades (1981–2016) of video footage. We detect surprisingly strong advances in the timing of tree leaf‐out and flowering in the footage: trees almost never had flushed at the time of the spring race in the 1980s while significantly more individuals had flushed in the video footage between 2006 and 2016 (probabilities of leafing and flowering increased by 19% and 67%, respectively). These shifts were most strongly related to January–March temperatures and growing‐degree hours (cumulative heat) in the preceding months.
- We demonstrate that this technical advance offers key benefits to fill gaps in existing phenology time series and reveal that archived video footage can indeed be applied to determine species‐temperature relationships with high spatiotemporal resolution. Only by compiling more data from the past will we be able to further our understanding on the effects of climate change on species and ecosystems in the future.
文献出处
De Frenne P, Van Langenhove L, Van Driessche A, Bertrand C, Verheyen K, Vangansbeke P. Using archived television video footage to quantify phenology responses to climate change. Methods Ecol Evol. 2018;00:1–9. https://doi.org/10.1111/2041-210X.13024