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| 1 | Interaction between climate and management on beta diversity components of vegetation in relation to soil properties in arid and semi-arid oak forests, Iran显示文摘This study aimed to investigate the interaction between regions with different climatic conditions(arid vs. semi-arid) and management(protected vs. unprotected) on the turnover and nestedness of vegetation in relation to physical, chemical and biological properties of soils in the Ilam Province of Iran. In each of the two regions, we sampled 8 sites(4 managed and 4 unmanaged sites) within each of which we established 4 circular plots(1000 m^2) that were used to investigate woody species, while two micro-plots(1 m×1 m) were established in each 1000-m^2 plot to analyze herbaceous species. In each sample unit, we also extracted three soil samples(0–20 cm depth) for measuring soil properties. The results indicated that the interaction between region and conservational management significantly affected the percent of canopy cover of Persian oak(Quercus brantii Linddl), soil respiration, substrate-induced respiration, as well as beta and gamma diversities and turnover of plant species. The percent of oak canopy cover was positively correlated with soil silt, electrical conductivity, available potassium, and alpha diversity, whereas it was negatively correlated with plant turnover. In addition, plant turnover was positively related to available phosphorus, while nestedness of species was positively related to organic carbon and total nitrogen. According to these results, we concluded that physical, chemical, and biological characteristics of limited ecological niche generally influenced plant diversity. Also, this study demonstrated the major contribution of the beta diversity on gamma diversity, especially in semi-arid region, because of the higher heterogeneity of vegetation in this area. | Heydari MEHDI Aazami FATEMEH Faramarzi MARZBAN Omidipour REZA Bazgir MASOUD Pothier DAVID Prévosto BERNARD | 2019 | Journal of Arid Land2019，11，1： | 3 |
| 2 | Long-term influence of fire and harvesting on boreal forest age structure and forest composition in eastern Québec显示文摘 | Mathieu Bouchard David Pothier | 2010 | Forest Ecology and Management2010，，4： | 1 |
| 3 | Clinical predictors of and mortality in acute respiratory distress syndrome: Potential role of red cell transfusion显示文摘 | Michelle Ng Gong B Taylor Thompson Paige Williams Lucille Pothier Paul D. Boyce David C. Christiani | 2005 | Critical Care Medicine2005，，6： | 1 |
| 4 | Transcanal Endoscopic Management of Cholesteatoma显示文摘 | Muaaz Tarabichi Jo?o Flávio Nogueira Junior Daniele Marchioni Livio Presutti David D. Pothier Stéphane Ayache | 2013 | Otolaryngologic Clinics of North America2013，，： | 1 |
| 5 | Long-term effect of fire on herbaceous species diversity in oriental beech (Fagus orientalis Lipsky) forests in northern Iran显示文摘We studied the long-term impacts of natural burning on herbaceous species diversity 37 years after a fire occurred in the Roudbar forests of Guilan Province, northern Iran. Numerous studies have examined short-term changes in understory vegetation following wildfire; however, very few long-term studies are available or changes inferred from retrospective studies based on chronosequences. For this study, 170 ha of forest (85 ha, burned areas; 85 ha, unburned areas) were surveyed. Because the 1000 m 2 plots were too large for detailed measurements of herbaceous species, we determined a sub-sample size according to the Whittaker's nested plot sampling protocol and minimal areas method. Hence, sub-plots of 32 m 2 were used for herbaceous species measurements, which consisted of percent cover of each species based on the Domin criterion. We measured plant diversity (Shannon-Wiener index), species richness (Margalef's index), and evenness (Smith-Wilson index). Mean percent cover, together with diversity, richness and evenness, increased markedly in burned areas compared to unburned controls. This suggests that the biodiversity of these forests could be restored within 37 years after fire. However, the abundance of invasive species such as Rubus fruticosus and Bromus benekenii increased significantly in burned areas, but these could be controlled by relevant silvicultural operations. | Mohammad Naghi ADEL Hassan POURBABAEI Ali OMIDI David POTHIER | 2012 | Forestry Studies in China2012，14，4： | 0 |
| 6 | Germination characteristics and diversity of soil seed banks and above-ground vegetation in disturbed and undisturbed oak forests显示文摘The destruction of natural ecosystems is an important issue in many parts of the world. In the west of Iran, a vast area of the Zagros Mountain range is covered by typical vegetation including several rare plant species, of which many are currently considered endangered by anthropogenic activities. Despite the important role of soil seed banks to help conserve these degraded plant communities, the floristic studies in the Zagros forests have only focused on aboveground vegetation. In this study, the characteristics of soil seed banks and above-ground vegetation were examined at two forest sites: an undisturbed control(Un) and a disturbed(D) site. The objectives of this study were 1) to investigate the diversity of above-ground vegetation and soil seed banks in disturbed and undisturbed forests, 2) to examine the soil properties and the germination characteristics of the soil seed bank in disturbed and undisturbed oak forests and 3) to estimate the potential of soil seed banks in the restoration of disturbed sites. The results show that soil properties between Un and D sites were significantly different with higher values of pH, NH 4-N, N tot, CEC, OC, clay and canopy percentage in the Un site than in the D site. The Simpson diversity, Margalef richness and evenness indices differed significantly between sites, either for the soil seed banks or the above-ground vegetation. After a period of 26 weeks, the germination speed and the mean daily number of germinants were significantly different between Un and D sites. Without other conservation measures, soil seed banks alone cannot result in a full recovery after severe disturbances in the oak forests of Zagros. | Mehdi HEYDARI Hassan POURBABAEI Omid ESMAELZADE David POTHIER Ali SALEHI | 2013 | Forestry Studies in China2013，15，4： | 0 |
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