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首页> 外文期刊>Climatic Change >Impact of climate, moisture regime, and nutrient regime on the productivity of Douglas-fir in coastal British Columbia, Canada.
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Impact of climate, moisture regime, and nutrient regime on the productivity of Douglas-fir in coastal British Columbia, Canada.

机译：气候，湿度和养分状况对加拿大不列颠哥伦比亚沿海的花旗松生产力的影响。

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摘要

Future climate change is expected to have many impacts on forest ecosystems. It is important to have some understanding of these impacts in order to make informed forest management decisions. A major consideration in making forest management decisions is the productivity of a site, as measured by site index. In this study, I relate Douglas-fir site index to accumulated growing degree-days greater than 5 degrees C (DD5), as well as to soil moisture and nutrient regime. This allows the impact of climate change on forest productivity to be estimated. A two step approach was followed. The first step derived models to estimate various climate variables to latitude, longitude, and elevation using data from climate stations. Then, these climate variables were used along with soil moisture and nutrient data to predict site index for the site index plots. A two step approach was taken because climatic data were not available for the site index plots. The trend was for site index to increase with both increasing soil moisture and nutrients, although the site index decreased on the wetter sites. Site index also increased with DD5 at the rate of 1.2 m for every increase of 100 units in DD5. These models can be used together to evaluate the impact of various climate change scenarios on site index..
机译：预计未来的气候变化将对森林生态系统产生许多影响。重要的是要对这些影响有一些了解，以便做出明智的森林经营决策。做出森林管理决策的主要考虑因素是站点的生产力，以站点索引衡量。在这项研究中，我将道格拉斯冷杉站点指数与大于5摄氏度（DD5）的累积生长天数以及土壤水分和养分状况相关联。这样就可以估算气候变化对森林生产力的影响。遵循两步法。第一步，使用气候站的数据推导模型，以估算各种气候变量的纬度，经度和海拔。然后，这些气候变量与土壤水分和养分数据一起用于预测站点指数图的站点指数。由于没有站点索引图的气候数据，因此采用了两步法。尽管土壤指数在湿润地区有所下降，但趋势是随着土壤水分和养分含量的增加，指数增加。 DD5每增加100个单位，站点索引随DD5的增加而增加1.2 m。这些模型可以一起使用，以评估各种气候变化情景对站点索引的影响。

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