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科学 · 重新引入海狸持续报道 · 第 2 篇，共 2 篇

6只海狸重返尼斯湖流域。真正的考验还在后面

首个海狸家庭现已抵达邓德雷根，位于尼斯湖流域。接下来的考验是：海狸营造的栖息地能否发展，同时又让鲑鱼和鳟鱼畅通无阻地迁徙。

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译自英文原文。

自上次报道以来的变化

7 天后

当时

尼斯湖海狸回归获批——是15个家族，不是15只海狸

现在

首个海狸家庭现已抵达邓德雷根，位于尼斯湖流域。接下来的考验是：海狸营造的栖息地能否发展，同时又让鲑鱼和鳟鱼畅通无阻地迁徙。

6只海狸，一个家庭：这就是尼斯湖流域目前正在展开的回归行动规模。2026年11月4日，这些动物被放归莫里斯顿峡谷邓德雷根再野化庄园的一处小湖，成为一项为期三年的计划中首批抵达的海狸。它们进入的是流域内较小的水域，而非尼斯湖本身。它们的到来标志着一次已完成的重新引入；支持者所承诺的湿地和更健康的河流，仍只是可能出现的结果，而非既成事实。⁠12⁠14

这个家庭由一只母海狸、两只约两岁的亚成年海狸，以及三只今年早些时候出生的幼崽组成。目前，最明确的成功迹象虽有限，却令人鼓舞：这些动物在新家中平静地游泳。⁠1

2026年10月30日，HeyDay News报道，苏格兰自然遗产局（NatureScot）已批准在三年内于尼斯河流域商定的地点放归最多15个海狸家庭。如今发生的变化是，首个家庭已进入这片土地。NatureScot向负责运营邓德雷根的生命之树组织和海狸信托基金（Beaver Trust）颁发了许可证。⁠15⁠12

关键事实

  1. 6首批放归的海狸家庭中的海狸数量 1
  2. 15个家庭三年内获准放归的上限 15
  3. 11月4日2026年已完成的放归日期 214

区分家庭和个体动物很重要。BBC苏格兰最近的报道说，该项目的目标是在三年内放归至少15个家庭群体。NatureScot的授权则允许放归最多15个家庭。一个是目标，另一个是上限：两者都不意味着获准放归超过15个家庭。⁠1⁠15

此前的一些报道混淆了这些细节。BBC关于批准的报道说，获准放归的是最多15只海狸，而不是15个家庭；NatureScot的官方措辞明确了获准规模。《农民周刊》将批准日期写为11月2日，但NatureScot的公告日期是10月30日。批准日期均不应与11月4日的放归日期混淆。⁠18⁠20⁠15⁠14

新家，老问题

这些动物并不是单纯因为邓德雷根想要它们才被迁来的。它们来自苏格兰其他地方，当地海狸对优质农田造成不利影响，而减少损害的努力已告失败或无法实施。放归前，这个家庭在五姐妹动物园的专业海狸安置设施接受了健康检查。⁠1

它们的来处是这个故事的重要组成部分。迁移既提供了一个新家，也回应了原栖息地的冲突。但这并没有让冲突问题从管理议题中消失。同一种动物在一片土地上可能受到欢迎，在另一片土地上却难以容纳。

2022年，NatureScot将尼斯河流域列为苏格兰最适宜海狸栖息的地点之一。该计划旨在让种群沿着林地以及数百英里长的河岸和湖岸彼此连通并发展壮大。根据BBC报道的NatureScot说法，申请方的咨询中，超过73%的受访者支持该提案。这反映的是参与回应者中的支持情况，并非对所有流域居民进行的代表性民调；此处尚未确定回应者总数。⁠1

当地历史为这次回归提供了大约五个世纪的时间背景。一份广为引用、现存于世的1526–1527年记录，将苏格兰的海狸记载在尼斯湖周边。这份记录并不能确定当地最后一只海狸何时死亡。大约400年前，海狸在苏格兰遭捕猎至灭绝；该国首次重新引入海狸是在2009年。邓德雷根开启了当地的新篇章，却不是苏格兰海狸回归之路的起点。⁠1

生命之树组织（Trees for Life）首席执行官史蒂夫·米克尔赖特称，看到这些动物回来是“一件非常美好的事”。他在接受BBC苏格兰采访时说：“我能看到它们在游泳，显得非常平静，这是一个非常好的迹象。”他还说，这些海狸一开始看起来就已经安顿下来、放松自在。这些是对其行为的初步观察，并不能证明这个家庭已长期定居。⁠1

水坝的希望与风险

该项目的生态愿景取决于海狸的活动，而非它们仅仅出现在当地。它们会挖掘水道、修剪树木并筑坝。这些活动可能形成水塘、湿地和林间空隙，让更多阳光照入。生命之树组织希望，由此形成的栖息地能够养育青蛙和蜻蜓，并让昆虫成为鸟类和蝙蝠的食物。⁠1

该组织自然恢复负责人艾伦·麦克唐纳谈到“新湿地、更多野生动物和更健康河流的潜力”。“潜力”才是关键所在。生命之树组织称，在较小的溪流上，水坝可以减缓水流并截留沉积物，从而改善水质。迄今尚无证据表明这次放归已带来这些改善。⁠1

渔业方面的担忧，在这些较小溪流上也最为具体。鲑鱼和鳟鱼会利用小溪前往产卵地。代表尼斯区鲑鱼渔业委员会的布莱恩·肖在接受BBC苏格兰采访时说，委员会对海狸筑坝“深感”担忧，尤其是在这些较小的水域。委员会计划在鱼类迁徙产卵期间监测其通行情况，并在春季鱼类向下游迁徙时再次监测。这是正在关注的风险，并非证据表明这6只海狸已阻断鱼类通行或损害其种群。⁠1

关键在于所有组织之间保持透明、公开，这样我们才能共同了解情况如何发展。

布莱恩·肖，尼斯区鲑鱼渔业委员会 1

放归前，该委员会一直与生命之树组织讨论这项申请。肖的立场是合作而非对抗：各组织应当携手合作，以便减轻对尼斯河可能造成的任何影响。他预计海狸种群可能迅速扩大，冲突的可能性也会随着时间推移而增加。这是他对未来的担忧，并非根据这首批海狸家庭得出的种群预测。⁠1

因此，实际考验并不是海狸是否会改变周围环境——该项目本就希望它们这样做——而是这些变化能否创造有益的栖息地，同时让鲑鱼和鳟鱼仍能通过关键溪流。若把期盼中的益处或担忧中的危害当作已获证实的事实，就超前于现有证据了。

生命之树组织计划在海狸安顿下来后安排导览参观，让人们有机会观察海狸及其活动留下的痕迹。待这个家庭安顿后，还将公布未来的放归地点。目前尚未确定参观开放日期，也没有公布下一次放归的具体日期。6只海狸让许可变成了一个正在发生的项目。它能否成为持久成功的生态恢复案例，还需要更多时间来判断，不能仅凭第一次平静的游泳就下结论。⁠1

时间线

第 8 天 · 2 篇报道

事件时间线

  1. 最先报道

  2. 我们的播报 · 第 1 次更新

    尼斯湖海狸回归获批——是15个家族，不是15只海狸

  3. 4天后

  4. 我们的播报 · 第 2 次更新当前位置

    6只海狸重返尼斯湖流域。真正的考验还在后面
播出原貌
  1. Six beavers now live in the Loch Ness catchment, beginning a three-year reintroduction programme. On October 30, we reported approval for up to 15 families over three years. Their arrival brings the prospect of new wetlands, alongside concerns about salmon and trout. Can the animals establish themselves while fish keep moving freely through the streams?
  2. The release took place on November 4. NatureScot had announced approval on October 30, granting Trees for Life and Beaver Trust the licence. Trees for Life operates the estate where this first family was released.
  3. The animals entered a lochan, a small loch, on the Dundreggan rewilding estate in Glenmoriston. That puts them within the wider Loch Ness and River Ness catchment, with the release itself taking place in the estate's smaller waters.
  4. The family came from elsewhere in Scotland, where beavers were damaging prime agricultural land. Attempts to reduce that damage had failed or weren't possible. Moving them gives the animals a new home while responding to difficulties where they were already living.
  5. Five Sisters Zoo provided the family's health checks before release, at its specialist beaver holding facility. Their journey brings together two sides of managing the species: finding suitable habitat and dealing with problems at existing sites.
  6. The six Eurasian beavers are one mother, two juveniles about two years old, and three young born earlier this year. They're the first family in the Ness Beaver Project's planned series of introductions.
  7. The animals were swimming calmly soon after their arrival. Steve Micklewright, chief executive of Trees for Life, described their return as a “very beautiful thing to see.” He said they looked settled and relaxed straight away.
  8. Micklewright said, “I can see them swimming and very calm, which is a really good sign.” That's the early picture of the family's behaviour. The project's longer-term hopes depend on what the animals do as they settle into their surroundings.
  9. NatureScot identified the River Ness catchment as one of Scotland's most suitable places for beavers in 2022. The programme aims to let populations connect and grow through woodland and hundreds of miles of river and loch banks.
  10. The project aims for at least 15 family groups over three years. NatureScot's licence allows up to 15 families over three years. Any expansion beyond that ceiling would need further permission. The licence counts whole families, each potentially containing several animals.
  11. More than 73 percent of people who responded to the applicants' consultation supported the proposal. That measures consultation respondents, rather than a representative survey of everyone living in the catchment.
  12. A surviving historical record from 1526 to 1527 places Scotland's beavers around Loch Ness. That's the basis for the roughly five-century comparison. Beavers were hunted to extinction in Scotland about 400 years ago, and first reintroduced nationally in 2009.
  13. Beavers can reshape the places they live by digging channels, cutting trees back and building dams. Those activities can create pools, wetlands and woodland gaps that let in more light. Trees for Life sees that engineering as the opportunity behind the release.
  14. Alan McDonnell, head of nature restoration at Trees for Life, described “the potential for new wetlands, more wildlife, and healthier rivers.” The project hopes those habitats will support frogs and dragonflies, with insects feeding birds and bats.
  15. On smaller streams, dams can slow water and trap sediment. Trees for Life hopes that will help improve water quality. But that same dam-building behaviour is at the centre of the fishery board's concern about fish passage.
  16. Salmon and trout use smaller burns, or streams, to reach spawning areas. Brian Shaw, representing the Ness District Salmon Fishery Board, described “deep” concern about dams there. The board plans to watch passage during spawning movements and again in spring, when fish move downstream.
  17. Shaw wants cooperation between the organisations so any impacts can be addressed. The board had already been discussing the application with Trees for Life before the release. He said, “The key is just transparency and openness between all organisations so we all know the situation as it develops.”
  18. Shaw expects the population could expand rapidly, increasing the potential for conflict. He wants the organisations to learn and manage problems together. For now, the family appears settled. Whether habitat changes develop as hoped, while salmon and trout retain free passage, will take monitoring over time.
  19. Trees for Life plans guided visits once the beavers have settled, offering chances to spot the animals and signs of their activity. There's no opening date yet. Future release sites will also be announced after this family settles into its new environment.

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