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首页> 外文期刊>Ecoscience >Long term aboveground litterfall production in boreal jack pine (Pinus banksiana) and black spruce (Picea mariana) stands along the Boreal Forest Transect Case Study in western central Canada
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Long term aboveground litterfall production in boreal jack pine (Pinus banksiana) and black spruce (Picea mariana) stands along the Boreal Forest Transect Case Study in western central Canada

机译：在加拿大中西部的北方森林样带案例研究中，北半球松（Pinus bankiana）和黑云杉（Picea mariana）的长期地上凋落物产生

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Boreal Forest Transect Case Study with a natural climate gradient resulting from latitudinal variation provides a spatial proxy for expected climate change, and can help to understand its impact on different ecosystem processes and how the forest species are adapting to these changes. We investigated year to year variation in aboveground litter production for 2001-2010 in 13 different mature jack pine (JP) and black spruce (BS) stands in relationship to climatic variables. Simple linear and step-wise regression analysis showed that tree species interacted differently with climate and stand ariables affecting litterfall. Annual total and woody litterfall varied from 57 to 164 g.m(-2).y(-1) in JP and 18 to 63 g.m(-2).y(-1) in BS. Needle litterfall accounted for about 70% of the total litter production in JP and BS and about 80% in mixed wood stands, and explained significant variation in total litter production. On regional scale, needle litter production was strongly influenced by growing degree days (R-2 = 0.96). Woody litterfall decreased with winter precipitation (R-2 = 0.95) in JP, and increased with productivity (R-2 = 0.88) in BS. Regression models developed here are useful tools in carbon budget models. Keywords: black spruce, boreal forests, climate change, jack pine, litterfall.
机译：纬向变化引起的自然气候梯度的北方森林样带案例研究为预期的气候变化提供了空间替代，可以帮助理解其对不同生态系统过程的影响以及森林物种如何适应这些变化。我们调查了2001-2010年13种不同的成熟千斤顶松树（JP）和黑云杉（BS）地上凋落物产量与气候变量之间的年变化。简单的线性和逐步回归分析表明，树木物种与气候和林分变量影响凋落物的相互作用不同。年度总和木屑凋落物在JP中为57至164 g.m（-2）.y（-1），在BS中为18至63 g.m（-2）.y（-1）。 JP和BS的枯枝落叶产量约占枯枝落叶总产量的70％，混合木架子上的枯枝落叶约占80％，这解释了枯枝落叶总产量的显着变化。在区域范围内，针叶凋落物的生产受到生长日数的强烈影响（R-2 = 0.96）。在日本，木质凋落物随冬季降水的减少而下降（R-2 = 0.95），而随着BS的生产力增加（R-2 = 0.88）而增加。这里开发的回归模型是碳预算模型中的有用工具。关键词：黑云杉，北方森林，气候变化，杰克松，凋落物。

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