Are productive yellow-cedar forests showing early signs of decline on Haida Gwaii?

海达瓜伊多产的黄雪松森林是否显示出衰退的早期迹象？

• 批准号: 513627-2017
• 负责人: Daniels, Lori
• 金额: $ 0.91万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Plus Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640481
• 关键词: productive; yellow; cedar; forests; showing

Yellow-cedar decline is among the most serious examples of forest dieback driven by global climate change.As yellow-cedar is of tremendous cultural importance, an integral part of temperate rainforest ecosystems, andcommercially valuable, understanding what is causing tree decline and death is essential for effectiveconservation and management of surviving forests. In 2014, the decline expanded to Haida Gwaii, posing asignificant challenge to Taan Forest Ltd., a Haida owned company that sustainably manages 193,000 ha ofrainforests. Taan Forest is deeply concerned about the observed decline and the potential implications for theirmanaged yellow-cedar forests.This NSERC Engage Plus proposal expands the new collaboration initiated between Taan Forest and Dr. LoriDaniels at UBC. In 2016, we developed and tested a new protocol for analysis and monitoring of yellow-cedardecline near bogs. While the growth of live healthy trees increased since c.1980, tree-ring analyses showedreduced growth of declining yellow-cedars before death. This tree-ring "signature" appears to be an earlywarning of decline in susceptible yellow-cedar. In 2017, we will sample forests at five sites suitable for timbermanagement and use the tree-ring "signature" to determine if productive yellow-cedar forests are also showingearly signs of decline on Haida Gwaii. We will work with Taan Forest to incorporate our findings in their bestmanagement practices to ensure sustainable management of yellow-cedar. Our findings will be shared inpresentations, a workshop, a written report, and a summer field tour, all to be held on Haida Gwaii.

黄雪松衰退是全球气候变化导致的森林枯死最严重的例子之一。由于黄雪松具有巨大的文化重要性，是温带雨林生态系统不可分割的一部分，并且具有商业价值，因此了解导致树木衰退和死亡的原因至关重要有效保护和管理幸存的森林。 2014 年，下降幅度扩大到了海达瓜依 (Haida Gwaii)，对 Taan Forest Ltd.（一家海达拥有的公司，可持续管理 193,000 公顷雨林）构成了重大挑战。 Taan Forest 深切关注观察到的衰退及其对其管理的黄雪松森林的潜在影响。NSERC Engage Plus 提案扩大了 Taan Forest 与 UBC 的 LoriDaniels 博士之间发起的新合作。 2016 年，我们开发并测试了一种新协议，用于分析和监测沼泽附近的黄雪松衰退。虽然自 1980 年左右以来，健康的活树的生长有所增加，但树木年轮分析显示，衰退的黄雪松在死亡前的生长有所减少。这种树木年轮的“特征”似乎是易受影响的黄雪松数量减少的预警。 2017 年，我们将对五个适合木材管理的地点的森林进行采样，并使用树木年轮“特征”来确定海达瓜伊高产的黄雪松林是否也出现了衰退的早期迹象。我们将与塔安森林合作，将我们的发现纳入他们的最佳管理实践中，以确保黄雪松的可持续管理。我们的研究结果将通过分享演示、研讨会、书面报告和夏季实地考察的形式进行，所有这些都将在海达瓜伊举行。