نتایج جستجو برای: shrublands
تعداد نتایج: 634 فیلتر نتایج به سال:
www.frontiersinecology.org © The Ecological Society of America S European landscapes are fire-prone due to the Mediterranean climate, the presence of flammable vegetation, and the rugged terrain (Pausas et al. 2008). The environmental and societal impacts of fire in the region have increased markedly during the 20th century. Pre-industrial fire regimes were generally associated with widespread ...
nvasive plant species occur throughout all floristic regions of California, but their spatial extent, diversity, and impacts within these regions vary considerably. Alterations of natural disturbance regimes have made communities more susceptible to these invasions (Brooks et al. 2004). Fire is a natural and chronic disturbance in many California plant communities and has been observed to promo...
Root turnover is a critical component of ecosystem nutrient dynamics and carbon sequestration and is also an important sink for plant primary productivity. We tested global controls on root turnover across climatic gradients and for plant functional groups by using a database of 190 published studies. Root turnover rates increased exponentially with mean annual temperature for fine roots of gra...
Effects of anthropogenic nitrogen (N) deposition and the ability of terrestrial ecosystems to store carbon (C) depend in part on the amount of N retained in the system and its partitioning among plant and soil pools. We conducted a meta-analysis of studies at 48 sites across four continents that used enriched 15N isotope tracers in order to synthesize information about total ecosystem N retenti...
1 We analyse the factors controlling seedling establishment of Scots pine at its southernmost geographical limit (southern Spain), by monitoring emergence, survival and growth for up to 4 years in the microhabitats to which seeds are dispersed. Naturally established seedlings were monitored in two mountain ranges, and experimental sowings were performed both in woodlands and in adjacent success...
0006-3207/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.biocon.2009.03.001 * Corresponding author. Tel.:+ 01 510 642 7304; fa E-mail addresses: [email protected] (J berkeley.edu (S.L. Stephens). Fuel reduction in the wildland–urban interface is a widely used international strategy for assisting human communities regarding wildfire threats, but very little research has examined ...
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