Soil solution and extractable soil nitrogen response to climate change in two boreal forest ecosystems

2005 ◽  
Vol 41 (4) ◽  
pp. 257-261 ◽  
Author(s):  
Paul S. J. Verburg
Keyword(s):  
Climate Change ◽  
Boreal Forest ◽  
Soil Solution ◽  
Soil Nitrogen ◽  
Forest Ecosystems ◽  
Nitrogen Response ◽  
Extractable Soil

Application of the forest ecosystem model EFIMOD 2 to jack pine along the Boreal Forest Transect Case Study

2006 ◽  
Vol 86 (Special Issue) ◽  
pp. 171-185 ◽  
Author(s):  
Cindy Shaw ◽  
Oleg Chertov ◽  
Alexander Komarov ◽  
Jagtar Bhatti ◽  
Marina Nadporozhskaya ◽  
...  
Keyword(s):  
Climate Change ◽  
Boreal Forest ◽  
Soil Carbon ◽  
Forest Soil ◽  
Forest Ecosystem ◽  
Forest Ecosystems ◽  
Jack Pine ◽  
Stand Age ◽  
Natural Disturbances ◽  
Individual Tree

Sustainability of forest ecosystems and climate change are two critical issues for boreal forest ecosystems in Canada that require an understanding of the links and balance between productivity, soil processes and their interaction with natural and anth ropogenic disturbances. Forest ecosystem models can be used to understand and predict boreal forest ecosystem dynamics. EFIMOD 2 is an individual tree model of the forest-soil ecosystem capable of modelling nitrogen feedback to productivity in response to changes in soil moisture and temperature. It has been successfully applied in Europe, but has not been calibrated for any forest ecosystem in Canada. The objective of this study was to parameterize and validate EFIMOD 2 for jack pine in Canada. Simulated and measured results agreed for changes in tree biomass carbon and soil carbon and nitrogen with increasing stand age and across a climatic gradient from the southern to northern limits of the boreal forest. Preliminary results from scenario testing indicate that EFIMOD 2 can be successfully applied to predict the impacts of forest management practices and climate change in the absence of natural disturbances on jack pine in the boreal forest of Canada. Model development is underway to represent the effects of natural disturbances. Key words: EFIMOD 2, forest soil, carbon, nitrogen, model, jack pine

Inconsistent effects of nitrogen canopy enrichment and soil warming on black spruce epiphytic phyllosphere bacterial communities, taxa, and functions

2020 ◽  
Author(s):  
Rim Khlifa ◽  
Daniel Houle ◽  
Hubert Morin ◽  
Steven Kembel
Keyword(s):  
Climate Change ◽  
Boreal Forest ◽  
Bacterial Communities ◽  
Forest Ecosystems ◽  
Black Spruce ◽  
Amplicon Sequencing ◽  
Nitrogen Addition ◽  
Rrna Gene ◽  
Climate Change Scenarios ◽  
Soil Warming

Phyllosphere microbial communities have received considerable attention given their important influence on their plant hosts and on ecosystem functioning. In a context where climate change threatens the sustainability of ecosystems, it is important to understand how phyllosphere microbes will respond to changes in their environment. We used 16S rRNA gene amplicon sequencing to quantify phyllosphere bacterial communities of black spruce exposed to nitrogen canopy enrichment and soil warming in the boreal forest of Quebec, Canada. The treatments were applied from April to September 2015 and the sampling was done in September. Neither treatment influenced the overall community structure and diversity of black spruce phyllosphere bacterial communities. However, some bacterial taxa and inferred microbial functions did differ among treatments, revealing in particular a stronger response of some bacteria to soil warming rather than nitrogen enrichment. Our results suggest that soil warming could potentially induce more changes in phyllosphere bacterial taxa abundances and functions than nitrogen addition, with potential consequences for microbial diversity and boreal forest ecosystem function under likely climate change scenarios. Our study suggests avenues for further research to integrate a more mechanistic understanding of the importance of phyllosphere microbes for black spruce and boreal forest ecosystems.

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