Items where Author is "Ullah, Sami"

Kourmouli, Angeliki and Hamilton, R. Liz and Pihlblad, Johanna and Bartlett, Rebecca and MacKenzie, Angus Robert and Hartley, Iain P. and Ullah, Sami and Shi, Zongbo (2025) Rapid Increase in Soil Respiration and Reduction in Soil Nitrate Availability Following CO₂ Enrichment in a Mature Oak Forest. ACS Omega, 10 (1). pp. 1624-1634. ISSN 2470-1343

Marcotte, Abbey L. and Limpens, Juul and Nunes, João Pedro and Howard, Ben C. and Hurley, Alexander G. and Khamis, Kieran and Krause, Stefan and Croghan, Danny and Kourmouli, Angeliki and Leader, Samantha and Singh, Tanu and Stoof, Cathelijne R. and Ullah, Sami and Kettridge, Nicholas (2024) Enhanced Hydrologic Connectivity and Solute Dynamics Following Wildfire and Drought in a Contaminated Temperate Peatland Catchment. Water Resources Research, 60 (7): e2023WR036. ISSN 0043-1397

Abbas, Ghulam and Ullah, Sami and Waqas, Muhammad and Abbas, Ziaul Haq and Bilal, Muhammad (2022) A position-based reliable emergency message routing scheme for road safety in VANETs. Computer Networks, 213: 109097. ISSN 1389-1286

Ullah, Sami and Bradley, Steve (2019) The effect of entrepreneurial ecosystems on performance of SMEs in low middle income countries with a particular focus on Pakistan. PhD thesis, Lancaster University.

Byrne, Patrick and Zhang, Hao and Ullah, Sami and Binley, Andrew and Heathwaite, Louise and Heppell, C.M. and Lansdown, K. and Trimmer, Mark (2015) Diffusive equilibrium in thin films provides evidence of suppression of hyporheic exchange and large-scale nitrate transformation in a groundwater-fed river. Hydrological Processes, 29 (6). pp. 1385-1396. ISSN 0885-6087

Mushtaq, Khadija and Ahmed, Mirza Ashfaq and Ullah, Sami (2014) A study on job satisfaction, motivation and organizational citizenship behavior. International Journal of Management Sciences and Business Research, 3 (11). pp. 1-12.

Byrne, Patrick and Binley, Andrew and Heathwaite, Louise and Ullah, Sami and Heppell, C. M. and Lansdown, K. and Zhang, Hao and Trimmer, Mark and Keenan, Patrick (2014) Control of river stage on the reactive chemistry of the hyporheic zone. Hydrological Processes, 28 (17). pp. 4766-4779. ISSN 0885-6087

Lansdown, Katrina and Heppell, Catherine M. and Dossena, Matteo and Ullah, Sami and Heathwaite, A. Louise and Binley, Andrew and Zhang, Hao and Trimmer, Mark (2014) Fine-scale in situ measurement of riverbed nitrate production and consumption in an armored permeable riverbed. Environmental Science and Technology, 48 (8). pp. 4425-4434. ISSN 0013-936X

Ullah, Sami and Zhang, Hao and Heathwaite, A. Louise and Heppell, Catherine and Lansdown, Katrina and Binley, Andrew and Trimmer, Mark (2014) Influence of emergent vegetation on nitrate cycling in sediments of a groundwater-fed river. Biogeochemistry, 118 (1-3). pp. 121-134. ISSN 0168-2563

Heppell, Catherine M. and Heathwaite, A. Louise and Binley, Andrew and Byrne, Patrick and Ullah, Sami and Lansdown, Katrina and Keenan, Patrick and Trimmer, Mark and Zhang, Hao (2014) Interpreting spatial patterns in redox and coupled water–nitrogen fluxes in the streambed of a gaining river reach. Biogeochemistry, 117 (2-3). pp. 491-509. ISSN 0168-2563

Binley, Andrew and Ullah, Sami and Heathwaite, Louise and Heppell, Catherine M. and Byrne, Patrick and Lansdown, Katrina and Trimmer, Mark and Zhang, Hao (2013) Revealing the spatial variability of water fluxes at the groundwater-surface water interface. Water Resources Research, 49 (7). pp. 3972-3992. ISSN 0043-1397

Byrne, Patrick and Zhang, Hao and Heathwaite, Louise and Binley, Andrew and Ullah, Sami and Kaeser, Dan and Heppell, Catherine M. and Lansdown, Katrina and Trimmer, Mark (2013) Passive pore water sampling provides evidence of suppression of hyporheic exchange and ntrate transformation in a groundwater-fed river. In: 13th International Conference on Environmental Science and Technology, 2013-09-05 - 2013-09-07.

Ullah, Sami and Zhang, Hao and Heathwaite, Louise and Binley, Andrew and Lansdown, K and Heppell, C.M. and Trimmer, Mark (2012) In situ measurement of redox sensitive solutes at high spatial resolution in a riverbed using Diffusive Equilibrium in Thin Films (DET). Ecological Engineering, 49. pp. 18-26. ISSN 0925-8574

Lansdown, K and Trimmer, Mark and Heppell, C.M. and Sgouridis, F and Ullah, Sami and Heathwaite, Louise and Binley, Andrew and Zhang, Hao (2012) Characterization of the key pathways of dissimilatory nitrate reduction and their response to complex organic substrates in hyporheic sediments. Limnology and Oceanography, 57 (2). pp. 387-400. ISSN 0024-3590

Byrne, Patrick and Zhang, Hao and Heathwaite, Louise and Binley, Andrew and Ullah, Sami and Kaeser, Dan and Heppell, C.M. and Lansdown, K and Trimmer, Mark (2012) Fine-scale measurement of reactive solutes in armoured riverbed sediments. In: EGU General Assembly 2012, 2012-04-23 - 2012-04-27.

Peichle, Mathias and Arian, Altaf and Ullah, Sami and Moore, Tim (2010) Carbon dioxide, methane, and nitrous oxide exchanges in an age-sequence of temperate pine forests. Global Change Biology, 16 (8). pp. 2198-2212. ISSN 1354-1013

Frasier, Rebeccah and Ullah, Sami and Moore, Tim R. (2010) Nitrous oxide consumption potentials of well-drained forest soils in Southern Québec, Canada. Geomicrobiology Journal, 27 (1). pp. 53-60. ISSN 0149-0451

Ullah, Sami and Zhang, Hao and Heathwaite, Ann Louise and Lansdown, K and Heppell, C.M. and Binley, Andrew Mark and Trimmer, M and Keenan, Patrick Owen (2010) Application of in-situ passive samplers for the investigation of the impacts of vegetated river beds on mineral N concentration gradients in the hyporheic zone. In: AGU Fall Meeting 2010, 2010-12-13 - 2010-12-17.

Binley, Andrew Mark and Ullah, Sami and Lansdown, K and Heathwaite, Ann Louise and Kaeser, Dan (2010) Direct evidence of lateral hyporheic flows revealed through single well tracer dilution tests. In: AGU Fall Meeting, 2010, 2010-12-13 - 2010-12-17.

Lansdown, K and Heppell, C.M. and Ullah, Sami and Heathwaite, Ann Louise and Trimmer, M and Heaton, T and Binley, Andrew Mark (2010) Environmental controls on groundwater- surface water mixing and nitrogen biogeochemistry in the hyporheic zone of a gravel bed river. In: EGU General Assembly 2010, 2010-05-01.

Ullah, Sami and Binley, Andrew Mark and Heathwaite, Ann Louise and Lansdown, K and Heppell, C.M. and Trimmer, M and Mullinger, Neil and Keenan, Patrick Owen and Zhang, Hao (2010) Reach Scale Variability in Vertical Hydraulic Gradients in the Hyporheic Zone of a Groundwater-fed River in Cumbria, UK. In: British Hydrological Society Annual Meeting, 2010-07-19 - 2010-07-19, Newcastle, UK.

Ullah, Sami and Heathwaite, Ann Louise and Zhang, Hao and Lansdown, K and Heppell, C.M. (2010) Spatial Variability of Redox Sensitive Chemical Species in the Hyporheic Zone of a Groundwater-fed River in Cumbria, UK. In: British Hydrological Society Annual Meeting, 2010-07-19 - 2010-07-19, Newcastle, UK.

Ullah, Sami and Frasier, Rebeccah and Pelletier, Luc and Moore, Tim R. (2009) Greenhouse gas fluxes from boreal forest soils during the snow-free period in Quebec, Canada. Canadian Journal of Forest Research, 39 (3). pp. 666-680. ISSN 0045-5067

Ullah, Sami and Moore, Tim (2009) Soil drainage and vegetation control of nitrogen transformation in forest soils, southern Quebec. Journal of Geophysical Research: Biogeosciences, 114. G01014. ISSN 2169-8961

Ullah, Sami and Moore, Tim R. (2009) Topographic controls of CH4 and N2O fluxes from temperate and boreal forest soils in eastern Canada. Integrated Land Ecosystem-Atmosphere Process Study Newsletter, 7. pp. 30-32.

Ullah, Sami and Frasier, Rebeccah and King, Leonora and Picotte-Anderson, Nathalie and Moore, Tim R. (2008) Potential next term fluxes of N2O and CH4 from soils of three forest types in Eastern Canada. Soil Biology and Biochemistry, 40 (4). pp. 986-994. ISSN 0038-0717

Ullah, Sami and Faulkner, Stephen P. (2006) Use of cotton gin trash to enhance denitrification next term in restored forested wetlands. Forest Ecology and Management, 237 (1-3). pp. 557-563. ISSN 0378-1127

Ullah, Sami and Zinati, Gladis (2006) Denitrification and nitrous oxide emissions from riparian forests soils exposed to prolonged nitrogen runoff. Biogeochemistry, 81 (3). pp. 253-267. ISSN 0168-2563

Ullah, Sami and Faulkner, Stephen (2006) Dentrification potential of different landuse types in an agricultural watershed, lower Mississippi valley. Ecological Engineering, 28 (2). pp. 131-140. ISSN 0925-8574

Ullah, Sami and Faulkner, Stepehn (2006) Functional assessment of urban forested wetlands. Proceedings of the Pakistan Academy of Sciences, 43 (1). pp. 15-28.

Ullah, Sami and Breitenbeck, G. A. and Faulkner, Stephen P. (2005) Denitrification and N2O emission from forested and cultivated alluvial clay soil. Biogeochemistry, 73 (3). pp. 499-513. ISSN 0168-2563

Ullah, Sami (1999) Koh-i-Sufaid (White Mountains) in Kurram Agency : a paradise of biodiversity. Natura Magazine, WWF-Pakistan Quarterly Magazine, 26. pp. 21-22.