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Articles 4441 - 4470 of 9411
Full-Text Articles in Entire DC Network
Technique Of Plant Regeneration From Immature Inflorescence Of Pennisetum Purpureum In Vitro, Xiaoxian Zhong, Jianming She, Hongru Gu, Jianli Zhang
Technique Of Plant Regeneration From Immature Inflorescence Of Pennisetum Purpureum In Vitro, Xiaoxian Zhong, Jianming She, Hongru Gu, Jianli Zhang
IGC Proceedings (1977-2023)
No abstract provided.
Fire Suppression Impacts On Fuels And Fire Intensity In The Western U.S.: Insights From Archaeological Luminescence Dating In Northern New Mexico, Christopher I. Roos, Tammy M. Rittenour, Thomas W. Swetnam, Rachel A. Loehman, Kacy L. Hollenback, Matthew J. Liebmann, Dana Drake Rosenstein
Fire Suppression Impacts On Fuels And Fire Intensity In The Western U.S.: Insights From Archaeological Luminescence Dating In Northern New Mexico, Christopher I. Roos, Tammy M. Rittenour, Thomas W. Swetnam, Rachel A. Loehman, Kacy L. Hollenback, Matthew J. Liebmann, Dana Drake Rosenstein
Geosciences Faculty Publications
Here, we show that the last century of fire suppression in the western U.S. has resulted in fire intensities that are unique over more than 900 years of record in ponderosa pine forests (Pinus ponderosa). Specifically, we use the heat-sensitive luminescence signal of archaeological ceramics and tree-ring fire histories to show that a recent fire during mild weather conditions was more intense than anything experienced in centuries of frequent wildfires. We support this with a particularly robust set of optically stimulated luminescence measurements on pottery from an archaeological site in northern New Mexico. The heating effects of an October 2012 …
Studies On Geographic Distribution Of Wild Poa Pratensis Population And Its Community Type In Yangtze, Yellow And Lancang River Source Region, Shihai Yang, Y. S. Ma, Q. M. Dong, J. J. Shi, Y. L. Wang, L. Sheng, X. D. Sun
Studies On Geographic Distribution Of Wild Poa Pratensis Population And Its Community Type In Yangtze, Yellow And Lancang River Source Region, Shihai Yang, Y. S. Ma, Q. M. Dong, J. J. Shi, Y. L. Wang, L. Sheng, X. D. Sun
IGC Proceedings (1977-2023)
No abstract provided.
Effect Of Topography On Utilization From Mountain Rangelands Of Mazandaran Province--Case Study: Rangelands Of Babolrood Basin, Ir‐Iran, Reza Tamartash, Hamid Jalilvand, Karim Soleimani, Maryam Saeidi
Effect Of Topography On Utilization From Mountain Rangelands Of Mazandaran Province--Case Study: Rangelands Of Babolrood Basin, Ir‐Iran, Reza Tamartash, Hamid Jalilvand, Karim Soleimani, Maryam Saeidi
IGC Proceedings (1977-2023)
No abstract provided.
Reaching 1.5 And 2.0 ◦C Global Surface Temperature Targets Using Stratospheric Aerosol Geoengineering, Simone Tilmes, Douglas G. Macmartin, Jan T. M. Lenaerts, Leo Van Kampenhout, Laura Muntjewerf, Lili Xia, Cheryl S. Harrison, Kristen M. Krumhardt, Michael J. Mills, Ben Kravitz, Alan Robock
Reaching 1.5 And 2.0 ◦C Global Surface Temperature Targets Using Stratospheric Aerosol Geoengineering, Simone Tilmes, Douglas G. Macmartin, Jan T. M. Lenaerts, Leo Van Kampenhout, Laura Muntjewerf, Lili Xia, Cheryl S. Harrison, Kristen M. Krumhardt, Michael J. Mills, Ben Kravitz, Alan Robock
School of Earth, Environmental, & Marine Sciences Faculty Publications
A new set of stratospheric aerosol geoengineering (SAG) model experiments has been performed with Community Earth System Model version 2 (CESM2) with the Whole Atmosphere Community Climate Model (WACCM6) that are based on the Coupled Model Intercomparison Project phase 6 (CMIP6) overshoot scenario (SSP5-34-OS) as a baseline scenario to limit global warming to 1.5 or 2.0 ◦C above 1850–1900 conditions. The overshoot scenario allows us to applying a peak-shaving scenario that reduces the needed duration and amount of SAG application compared to a high forcing scenario. In addition, a feedback algorithm identifies the needed amount of sulfur dioxide injections in …
The Study On Growth And Yield Changes Dynamic Laws Of Xinjiang Small Reed (Phragmites Australis), Abdurahman Metniyaz, Ainiwaer Aishan, Ataku K.
The Study On Growth And Yield Changes Dynamic Laws Of Xinjiang Small Reed (Phragmites Australis), Abdurahman Metniyaz, Ainiwaer Aishan, Ataku K.
IGC Proceedings (1977-2023)
No abstract provided.
A Study Of Forage Germplasm Resources And Their Utilization In Heilongjiang Province China, Xinyin Luo, Hong Li, Haiyang You
A Study Of Forage Germplasm Resources And Their Utilization In Heilongjiang Province China, Xinyin Luo, Hong Li, Haiyang You
IGC Proceedings (1977-2023)
No abstract provided.
Studies On Root Turion Propagation Technology Of Wild Hazelnut In Daxing'anling, China, Yuliang Liu, Fugui Mi, Puchang Wang
Studies On Root Turion Propagation Technology Of Wild Hazelnut In Daxing'anling, China, Yuliang Liu, Fugui Mi, Puchang Wang
IGC Proceedings (1977-2023)
No abstract provided.
Forage‐Livestock Industry Is A Fundamental Issue For Ecologic And Economic Win‐Win In The Loess Plateau, China, Xiuqin Liu, Zihe Zhang
Forage‐Livestock Industry Is A Fundamental Issue For Ecologic And Economic Win‐Win In The Loess Plateau, China, Xiuqin Liu, Zihe Zhang
IGC Proceedings (1977-2023)
No abstract provided.
Characterization Of Shallow Subsurface Hydrology In Large Fine-Grained Floodplains, Mary Grace Lemon
Characterization Of Shallow Subsurface Hydrology In Large Fine-Grained Floodplains, Mary Grace Lemon
LSU Doctoral Dissertations
Floodplains are hydrologically dynamic, receiving water from overbank events, hyporheic flows, local precipitation, and regional groundwater sources. These sources are variously important contributors to the heterogeneous floodplain water pool that includes matrix water in soil micropores, mobile water in soil macropores, groundwater below the rooting zone, ephemeral to seasonal surface storage, and permanent surface water features such as oxbow lakes, sloughs, and other secondary channels. All sources may be ecologically relevant for floodplain vegetation, but the exact roles of each source in both controlling soil water and shallow groundwater recharge and in controlling floodplain water drainage are not well understood, …
The Dynamic Changes Of Biodiversity In Hongsongwa Nature Reserve, Tiran Huang, Lianfang Li, Haifeng Liu, Jianguang Pang
The Dynamic Changes Of Biodiversity In Hongsongwa Nature Reserve, Tiran Huang, Lianfang Li, Haifeng Liu, Jianguang Pang
IGC Proceedings (1977-2023)
No abstract provided.
Preservation Of Latest Cretaceous (Maastrichtian) - Paleocene Frogs (Eorubeta Nevadensis) Of The Sheep Pass Formation Of East-Central Nevada And Implications For Paleogeography Of The Nevadaplano, Joshua W. Bonde, Peter A. Druschke, Richard P. Hilton, Amy C. Henrici, Stephen M. Rowland
Preservation Of Latest Cretaceous (Maastrichtian) - Paleocene Frogs (Eorubeta Nevadensis) Of The Sheep Pass Formation Of East-Central Nevada And Implications For Paleogeography Of The Nevadaplano, Joshua W. Bonde, Peter A. Druschke, Richard P. Hilton, Amy C. Henrici, Stephen M. Rowland
Geoscience Faculty Research
Here we report on exceptional preservation of remains of the frog Eorubeta nevadensis in deposits of the Sheep Pass Formation, ranging from Late Cretaceous to Eocene, in the south Egan Range, Nevada. This formation represents a lacustrine basin within the Sevier retroarc hinterland. The formation is subdivided into six members (A–F); of interest here are members B and C. The base of member B is ?uppermost Cretaceous-Paleocene, while member C is Paleocene. Member B frogs are preserved in three taphonomic modes. Mode 1 frogs are nearly complete and accumulated under attritional processes, with frogs settling on microbial mats, as evidenced …
Ecological Characteristics Of Halophytes In The Arid Areas, Wenjun Han, Kunio Hamamura
Ecological Characteristics Of Halophytes In The Arid Areas, Wenjun Han, Kunio Hamamura
IGC Proceedings (1977-2023)
No abstract provided.
Pystprism: Tools For Voxel-Based Space–Time Prisms, Rebecca Loraamm, Joni A. Downs, James Anderson, David S. Lamb
Pystprism: Tools For Voxel-Based Space–Time Prisms, Rebecca Loraamm, Joni A. Downs, James Anderson, David S. Lamb
School of Geosciences Faculty and Staff Publications
The observed movements of humans and animals are realizations of complex spatiotemporal processes. Recent advances in location-aware technologies have rendered trajectory data ubiquitous. Examining the sequenced, instantaneous locations found in movement trajectory data for information reconstructing the location or state of the mover between observed points comprises a primary focus in Time Geography and related disciplines. The PySTPrism toolbox introduced in this paper provides a straightforward and open-source implementation of the Probabilistic Space Time Prism, in addition to related tools from Time Geography. PySTPrism is implemented in Python using the ArcPy module in ArcGIS Pro Desktop.
The Influence Of Human Disturbance On Wildlife Use Of A Highway In South Texas, Thomas J. Yamashita
The Influence Of Human Disturbance On Wildlife Use Of A Highway In South Texas, Thomas J. Yamashita
Theses and Dissertations
Roads can greatly impact wildlife. Wildlife vehicle collisions contribute to population declines while disturbance from human activity may prevent wildlife from using areas around roads. The construction of mitigation structures may lessen these effects through fine scale modification of animal use of roadside areas. In this thesis, how the construction of wildlife mitigation structures impacted the fine scale distribution of wildlife on State Highway 100 in Cameron County, Texas was examined. Spatial and temporal scale may also influence these relationships. The relationship between human activity and wildlife activity around the highway was explored and how the distribution of wildlife road …
Geospatial Analyses Of Seismic Hazards And Risk Perception In Libya, Somaia Suwihli
Geospatial Analyses Of Seismic Hazards And Risk Perception In Libya, Somaia Suwihli
Graduate Theses and Dissertations
Libya is not considered a highly active seismic region. However, several earthquakes of magnitude >5.0 have occurred there. This dissertation analyzes the seismicity of Libya in order to better understand earthquake hazards, related geomorphic features, and the current evolution of Libyan perceptions of seismic risk. The first article developed a baseline of past and current seismic inventory in Libya, which represented an assessment of Libya seismic hazard by translating, analyzing, and compiling historical sources and archaeological data. This study shows that Libya has experienced earthquakes in varying degrees since ancient times. Through the spatial and temporal distribution of earthquakes from …
Assessment Of Important Environmental Factors Affecting Agropyron Trichophrum Establishment By Using An Ordination Method, Fazel Amiri, M. R. Chaichi, T. Tabatabai
Assessment Of Important Environmental Factors Affecting Agropyron Trichophrum Establishment By Using An Ordination Method, Fazel Amiri, M. R. Chaichi, T. Tabatabai
IGC Proceedings (1977-2023)
No abstract provided.
Monitoring Impervious Surface Area Dynamics To Assess Urbanisation Of A Catchment: Msimbazi River Valley Dar Es Salaam, 1989 - 2015, Befrina Igulu, Elisante Mshiu
Monitoring Impervious Surface Area Dynamics To Assess Urbanisation Of A Catchment: Msimbazi River Valley Dar Es Salaam, 1989 - 2015, Befrina Igulu, Elisante Mshiu
Tanzania Journal of Science
This work examined the effects of land use and cover change on the impervious surface as a measure of urbanisation together with its driving factors such as population growth and economic development. The spatial and temporal variations of the impervious surface area were extracted from the Landsat images of the years 1989, 1995, 2005, and 2015. Data analyses involved the selection of the endmember through Minimum Noise Fraction (MNF) and Linear Spectral Mixed Analysis (LSMA) on the images. Four dominant land cover types were mapped as results, which are forest, non-forest vegetation, bare-land, and built-up area. The non-forest vegetation and …
Soil-Plant Nutrient Cycling In Old Cocoa Farms In A Part Of South Western Nigerian Forest Belt, Olusola Afolayan
Soil-Plant Nutrient Cycling In Old Cocoa Farms In A Part Of South Western Nigerian Forest Belt, Olusola Afolayan
Tanzania Journal of Science
Apart from pests and diseases, a vital issue in the early mature of cocoa crop in Nigeria is soil nutrient degradation in relation to the ageing of the farms and annual mining of nutrients via yield harvests. Indigenous production of cocoa in southwest Nigeria has been on without fertilizer applications. This is the basis for the reduction average lifespan and productive years of the plantation. The aim of this study was to quantify the rates of soil nutrient losses via cycling channels in old cocoa farm using cocoa beans, leaves, litters, and pod husks in south western Nigeria forest belt. …
Sedimentology And Paleocurrent Study Of The Early Triassic Rocks In The Ruhuhu Basin, Sw Tanzania, Audax Kiwango, Diwakar Mishra
Sedimentology And Paleocurrent Study Of The Early Triassic Rocks In The Ruhuhu Basin, Sw Tanzania, Audax Kiwango, Diwakar Mishra
Tanzania Journal of Science
The sedimentary succession ranging in age from Permian to Early Triassic in Ruhuhu basin was subdivided into eight informal lithostratigraphic units, identified by the symbols from K1 to K8. Manda Formation (K8) belongs to Early Triassic age and comprises two Members, i.e., Lower Kingori Member and Upper Lifua Member (150-200 m thickness). The implications of present study relate to inter and intra basinal correlations which may provide regional depositional framework from a mass of local details. Present investigation connoting the lithofacies studies in conjunction with palaeocurrent and grain size analysis of the early Triassic strata aims at interpreting the depositional …
Variability Of Selected Mineral Contents In Marine Fish From Local Markets In Tanzania, Stella Shija, Matobola Mihale, Daniel Shilla
Variability Of Selected Mineral Contents In Marine Fish From Local Markets In Tanzania, Stella Shija, Matobola Mihale, Daniel Shilla
Tanzania Journal of Science
Mineral contents (K, Na, Ca and Mg) in selected marine fish species (Alectis ciliaris, Lethrinus harak, Rastrelliger kanagurta and Siganus canaliculatus) from local fish markets were analysed in wet and dry seasons. The processing methods (frying and boiling) were also assessed for their influence on the mineral contents. Samples were randomly collected from Tanga, Bagamoyo, Dar es Salaam and Mtwara seaports, analysed using established methods and determined by Graphite Furnace Atomic Absorption Spectrometry. Mean mineral contents in individual and all analysed fish species were high during dry season compared to wet season except Ca and the difference was statistically significant …
Photosynthesis And Soil Respiration From A Mixed‐Grass Prairie: Effects Of Grazing And Drought, Xuejun Dong, Paul Nyren, Bob Patton, Guojie Wang, Brian Kreft, Anne Nyren, Ryan Limb, Don Kirby, Larry Cihacek
Photosynthesis And Soil Respiration From A Mixed‐Grass Prairie: Effects Of Grazing And Drought, Xuejun Dong, Paul Nyren, Bob Patton, Guojie Wang, Brian Kreft, Anne Nyren, Ryan Limb, Don Kirby, Larry Cihacek
IGC Proceedings (1977-2023)
No abstract provided.
The Role Of Plant Richness & Diversity On Ecological Equilibrium Of Rangeland Habitats On Alborz Mountain (North Of Iran), D. Asgarizadeh, M. H. Jouri, V. Rahimi, J. Shahi
The Role Of Plant Richness & Diversity On Ecological Equilibrium Of Rangeland Habitats On Alborz Mountain (North Of Iran), D. Asgarizadeh, M. H. Jouri, V. Rahimi, J. Shahi
IGC Proceedings (1977-2023)
No abstract provided.
Effect Of Nacl Concentration On Embryogenic Callus Growth And Plant Regeneration Of Pennisetum Purpureum Schumach (Napier Grass) In Vitro, Xiaoxian Zhong, Jianming She, Hongru Gu
Effect Of Nacl Concentration On Embryogenic Callus Growth And Plant Regeneration Of Pennisetum Purpureum Schumach (Napier Grass) In Vitro, Xiaoxian Zhong, Jianming She, Hongru Gu
IGC Proceedings (1977-2023)
No abstract provided.
Grassland Sustainability And Livestock Production In Taipusi Banner, Inner Mongolia, Y. Zheng, David R. Kemp, Z. Xu, R. Jones, T. Takahashi, Q. Tian, T. Xilin
Grassland Sustainability And Livestock Production In Taipusi Banner, Inner Mongolia, Y. Zheng, David R. Kemp, Z. Xu, R. Jones, T. Takahashi, Q. Tian, T. Xilin
IGC Proceedings (1977-2023)
No abstract provided.
Studies On Formation Classification And Composing Characteristic Of Helophyte In Maqu Meadow, China, Huaishan Zhang, Fuping Tian, Jinghua Li
Studies On Formation Classification And Composing Characteristic Of Helophyte In Maqu Meadow, China, Huaishan Zhang, Fuping Tian, Jinghua Li
IGC Proceedings (1977-2023)
No abstract provided.
Effects Of Atriplex Canescens On Planted Areas In Iran, M. A. Zare Chahouki, Mohammad Jafari, Hossein Azarnivand, M. Shafi Zadeh
Effects Of Atriplex Canescens On Planted Areas In Iran, M. A. Zare Chahouki, Mohammad Jafari, Hossein Azarnivand, M. Shafi Zadeh
IGC Proceedings (1977-2023)
No abstract provided.
Strategy Of Reproductive Allocation Of Stellera Chamae Jasme Population, F. Xing, J. X. Guo, Y. Wang, Y. Chen
Strategy Of Reproductive Allocation Of Stellera Chamae Jasme Population, F. Xing, J. X. Guo, Y. Wang, Y. Chen
IGC Proceedings (1977-2023)
No abstract provided.
Dynamic Change Of Production And Botanical Composition In Trifolium Repens And Perennial Grass Mixtures Over 20 Years In The Karst Region, Southwest China, Yuansu Wang, Fuzeng Hong, Qingrong Wa, Alan Mcdermott
Dynamic Change Of Production And Botanical Composition In Trifolium Repens And Perennial Grass Mixtures Over 20 Years In The Karst Region, Southwest China, Yuansu Wang, Fuzeng Hong, Qingrong Wa, Alan Mcdermott
IGC Proceedings (1977-2023)
No abstract provided.
Climate Change Impacts The Subsurface Transport Of Atrazine And Estrone Originating From Agricultural Production Activities, Renys Enrique Barrios, Simin Akbariyeh, Chuyang Liu, Khalid Muzamil Gani, Margarita T. Kovalchuk, Xu Li, Yusong Li, Daniel D. Snow, Zhenghong Tang, John Gates, Shannon L. Bartelt-Hunt
Climate Change Impacts The Subsurface Transport Of Atrazine And Estrone Originating From Agricultural Production Activities, Renys Enrique Barrios, Simin Akbariyeh, Chuyang Liu, Khalid Muzamil Gani, Margarita T. Kovalchuk, Xu Li, Yusong Li, Daniel D. Snow, Zhenghong Tang, John Gates, Shannon L. Bartelt-Hunt
Nebraska Water Center: Faculty Publications
Climate change will impact soil properties such as soil moisture, organic carbon and temperature and changes in these properties will influence the sorption, biodegradation and leaching of trace organic contaminants to groundwater. In this study, we conducted a modeling case study to evaluate atrazine and estrone transport in the subsurface under current and future climate conditions at a field site in central Nebraska. According to the modeling results, in the future, enhanced evapotranspiration and increased average air temperature may cause drier soil conditions, which consequently reduces the biodegradation of atrazine and estrone in the water phase. On the other hand, …