Responses of boreal trees to global change: acclimate, migrate or disappear?

北方树木对全球变化的反应：适应、迁移还是消失？

基本信息

批准号：
203198-2013
负责人：
Dang, QingLai
金额：
$ 1.82万
依托单位：
Lakehead University
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2018
资助国家：
加拿大
起止时间：
2018-01-01 至 2019-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=648616
关键词：
Responses boreal trees global change

项目摘要

Atmospheric carbon dioxide concentration has been increasing since the Industrial Revolution and will continue to increase in the foreseeable future. Rising CO2 affects the physiology, growth and distribution of plants. Studies suggest that the rising CO2 induced climate change will be most prominent in the boreal region. The boreal forest is the largest terrestrial ecosystem on the earth. Its ecophysiological activities can have a profound impact on the environmental conditions of the earth. The ecophysiological processes are in turn controlled by climate and soil conditions. While the impact of climate variables and some soil factors are studied relatively extensively, it is still not clear how soil temperature may interact with other factors to influence the responses of boreal trees to climate change. Soil temperature is very variable in the boreal region. Thus understanding its potential effects is critical for a better understanding of how the boreal forest may respond to climate change. This research will examine how soil temperature will interact with other environmental factors to influence the ecophysiological activities and growth of important boreal tree species under the projected future atmospheric CO2 concentration. Computer models will be developed for incorporating soil conditions into ecological models. There are several types of responses to climate change: migrate to other areas, make physiological and growth adjustment to fit the new conditions, continue to grow at the current location but with a lower performance or become extinct. This research will provide insights on the relative likelihood of these responses and advance the science of boreal tree ecophysiology. The boreal forest is a critical resource supporting the forest industry and tourism in Canada. The improved understanding of and predicting power for potential responses of boreal trees to climate change will provide policy makers and forest managers with information to develop more suitable adaptation and mitigation strategies.****

自工业革命以来，大气二氧化碳的浓度一直在增加，并且在可预见的将来将继续增加。二氧化碳的上升影响植物的生理，生长和分布。研究表明，二氧化碳诱导的气候变化在北方地区最突出。北方森林是地球上最大的陆地生态系统。它的生态生理活性可以对地球的环境条件产生深远的影响。生态生理过程又受气候和土壤条件控制。尽管对气候变量和某些土壤因素的影响相对广泛研究，但仍不清楚土壤温度如何与其他因素相互作用以影响北方树对气候变化的反应。土壤温度在北方地区的变化很大。因此，了解其潜在影响对于更好地理解北方森林如何应对气候变化至关重要。这项研究将研究土壤温度将如何与其他环境因素相互作用，以影响预计的未来大气二氧化碳浓度下重要的北方树种的生态生理活性和生长。将开发计算机模型将土壤条件纳入生态模型。对气候变化的反应有几种类型：迁移到其他领域，使生理和增长调整以适应新条件，在当前位置继续增长，但性能较低或灭绝。这项研究将提供有关这些反应的相对可能性的见解，并推进北方树生态生物学的科学。北方森林是支持加拿大森林行业和旅游业的关键资源。对北方树对气候变化的潜在反应的了解和预测能力的改进，将为决策者和森林经理提供信息，以制定更合适的适应和缓解策略。****