生物与医学2024doi.org
农业耕作方式正在推动欧洲鸟类种群下降
Farmland practices are driving bird population decline across Europe (2023)
进阶 · 约 75 分钟读完前置知识：生态学/种群动态基础、统计回归与混合模型、欧洲农业政策（如欧盟共同农业政策）常识
导读
这篇 PNAS 论文整合欧洲多国长期鸟类监测数据（据评论介绍，涵盖约 170 个物种、四十年的种群趋势），分析农田耕作方式与鸟类种群变化之间的关系，结论指出现代集约化农业是欧洲鸟类数量下降的重要驱动因素。研究同时强调，不同地区、不同物种之间的下降模式存在明显差异，具体耕作方式的影响仍需进一步厘清。
HN 关注点：数据规模罕见（跨欧洲四十年、上百个物种），并把生物多样性下降明确归因于农业集约化，引发读者对结论是否过度概括、以及欧盟农业补贴与休耕政策如何影响鸟类的讨论。
HN 评论精选
这几条评论里：支持 1 质疑 1 补充 1
支持生态学家：结论不新但数据规模空前（170 物种×40 年），下降背后有值得深挖的细微差别与改善空间。
作为生态学家，我几乎每次做科普演讲都会引用这篇论文。这绝不是新结论——过去三十年已有一系列研究得出相同结果[1]。但它仍是一项非常重要的研究，原因就在于汇总的数据量之大：分析欧洲四十年间 170 个物种的趋势，实属壮举！综合来看，它有力说明现代农业实践正在撕裂环境，同时也表明生物多样性下降背后有大量细微差别值得进一步研究，而这些差别也为改善提供了希望。
veddox查看英文原文
I reference this paper in almost every science-communication talk I give as an ecologist. It was not a new result by any means, we've had a whole range of other studies showing the same over the last three decades [1]. But it was still a very important study, simply for the sheer amount of data they collated: analysing 170 species trends across four decades across Europe is quite a feat! Taken together, it really drives home the message that modern agricultural practices are shredding the environment, but also that there is a lot of nuance behind biodiversity declines that we need to look into further, and that offer hope for improvement. [1] e.g. https://doi.org/10.1017/S0959270919000480, https://doi.org/10.1038/s41598-019-45854-0, https://doi.org/10.1111/conl.12585,https://doi.org/10.1111/cobi.13307, https://doi.org/10.1016/j.agee.2011.05.006, https://doi.org/10.1111/j.1474-919X.2004.00375.x
质疑质疑把全欧洲一概而论：农场规模、欧盟休耕补贴、林地占比差异巨大，应细分具体耕作方式与受影响物种。
把整个欧洲笼统归入“农田实践”这一个筐里，并不是正确的做法。有些国家小农众多，有些国家则是少量大型农场，两者做法差异巨大。在东欧，生活成本低得多，许多农民（比如我的邻居）并不真正务农，而是为领取欧盟补贴“维持土地文化”——实际上就是每年割两次草，别的什么都不做。我有一位农民邻居每年种地，只是为了让他想要的某种植物开花供蜜蜂采蜜，他根本不收割，直接翻耕回土里。还有林地面积的差异：我国波兰超过 30% 的国土是林地且在增长，与荷兰（不是针对荷兰，它在其他方面更好）根本无法相比。而他们的地图恰恰显示了这一点。所以“整个欧洲因农田实践导致鸟类物种总体下降”这样的说法就是不成立的。我很想看到具体哪种耕作方式导致哪些鸟类种群下降的对比研究，也许这样我们就能推广更有效的做法。
Roark66查看英文原文
Putting the entirety of Europe into one basket of "farmland practices" is really not a correct way to approach this. There are countries that have lots of tiny farmers, there are countries that have small number of huge farms. Practices between the two are hugely different. Also in the east where cost of living is much lower many farmers don't do farming (like my neighbours) but they "keep land culture" for which they are paid by the EU. This means essentially mowing the hay twice a year and doing nothing else. One of my farmer neighbours plants his fields every year, for his bees to make hone from a particular plant he wants honey from. He doesn't even collect the results, he just mows it back into the earth. Then there is the amount of woodland area. Compare my country Poland that has over 30% of its area as woodlands and growing with Netherlands(not picking on Netherlands, it is better in other ways). You can't. And their map really shows it. So making a statement like "overall decline of bird species due to farming practices across Europe" is just untrue. I'd love to see some sort of comparison of which farming practices specifically cause which bird populations to decline. Perhaps then we can adapt these tgat work better.
补充指出可再生能源对鸟类影响的研究存在空白，可能因经费难申请。
奇怪的是，似乎没什么人很有兴趣研究可再生能源项目对鸟类种群的影响。大概是因为这类研究极难拿到经费吧。
elzbardico查看英文原文
Curiously, nobody seems to be very interested in studying the impact of renewable energy projects for bird populations. Probably hard as hell to get grants for that.
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