1997年至2022年气候变化下育空地区南部和中部地莓覆盖的趋势

IF 1 4区 生物学 Q3 PLANT SCIENCES Botany Pub Date : 2023-09-07 DOI:10.1139/cjb-2023-0068
Charles Cjk Krebs, Rudy Boonstra, A. J. Kenney, Elizabeth J. Hofer, Thomas S. Jung, M. O’Donoghue
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引用次数: 0

摘要

浆果是北方森林植物群的重要组成部分,为许多鸟类和哺乳动物以及加拿大北部的当地人提供季节性的重要食物。在这里,我们要问的是,在过去的二十年里,育空北部森林的浆果覆盖率是否发生了变化。我们在相距300公里的未受干扰的森林地点监测了五种常见物种。在我们的Kluane站点,我们每年监测710个固定象限,持续26年(1997-2002年),在Mayo站点,每年监测500个象限,持续18年(2005-2022年)。这两个地点的四个物种,Arctostaphylos uva ursi(熊莓)、Arctostapphylos rubra(红熊莓),Empetrum nigrum(杨梅)和Geocaulon lividum(蟾蜍亚麻)的覆盖率每年下降0.2-0.8%。相比之下,越橘每年增加0.5%和0.8%。我们测试了夏季温度和降雨量的增加是否与观察到的变化相关,但没有发现显著的关系。这些北方植物的数量正在发生变化,但我们对这些变化的程度和速度的数据有限。我们建议进行实验,以了解这些变化的原因。我们的研究是监测加拿大北部这一重要生态系统中重要浆果物种的开始。
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Trends in groundberry cover under climate change in the southern and central Yukon, 1997 to 2022
Groundberries are an important component of the flora of the boreal forest and provide seasonally important food for many birds and mammals, as well as local people in northern Canada. Here we ask if there has been a change in the cover of groundberries in the Yukon boreal forest over the last two decades. We monitored five common species at undisturbed forest sites spaced 300 km apart. At our Kluane site we monitored 710 fixed quadrats per year for 26 years (1997–2022), and at Mayo 500 quadrats per year for 18 years (2005–2022). The cover of four species, Arctostaphylos uva-ursi (bearberry), Arctostaphylos rubra (red bearberry), Empetrum nigrum (crowberry), and Geocaulon lividum (toadflax), declined annually by 0.2-0.8% at both sites. In contrast, Vaccinium vitis-idaea (lingonberry) increased annually by 0.5 and 0.8%. We tested if increases in summer temperature and rainfall were correlated with the observed changes but found no significant relationships. These boreal plants are changing in abundance, but we have limited data on the extent and speed of these changes. We recommend experiments to understand the cause(s) of these changes in groundberry productivity. Our study is a start in monitoring important berry species in this critical ecosystem of northern Canada.
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来源期刊
Botany
Botany 生物-植物科学
CiteScore
2.20
自引率
9.10%
发文量
48
期刊介绍: Botany features comprehensive research articles and notes in all segments of plant sciences, including cell and molecular biology, ecology, mycology and plant-microbe interactions, phycology, physiology and biochemistry, structure and development, genetics, systematics, and phytogeography. It also publishes methods, commentary, and review articles on topics of current interest, contributed by internationally recognized scientists.
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