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Articles 1171 - 1200 of 3204
Full-Text Articles in Earth Sciences
Impact Of Grazing On Vegetation Of Artemisia--Annuals Rangelands In Semi Desert Of Uzbekistan, Toshpulot F. Rajabov, Bakhtiyor K. Mardonov, Wolfgang Pittroff, F. N. Bobodjanov
Impact Of Grazing On Vegetation Of Artemisia--Annuals Rangelands In Semi Desert Of Uzbekistan, Toshpulot F. Rajabov, Bakhtiyor K. Mardonov, Wolfgang Pittroff, F. N. Bobodjanov
IGC Proceedings (1977-2023)
No abstract provided.
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.
Grazing Impacts On Natural Steppe Community Of Eastern Mongolia, N. Narantuya
Grazing Impacts On Natural Steppe Community Of Eastern Mongolia, N. Narantuya
IGC Proceedings (1977-2023)
No abstract provided.
Monitoring Of Production In The Steppes Pre‐Caspian Area And Open Wood (Non Desert!) And Forest Of Turan (Middle Asia), Yuri M. Miroshnichenko
Monitoring Of Production In The Steppes Pre‐Caspian Area And Open Wood (Non Desert!) And Forest Of Turan (Middle Asia), Yuri M. Miroshnichenko
IGC Proceedings (1977-2023)
No abstract provided.
Studies On The Expression Of Exogenous P5cs Gene In Transgenic Wheatgrasses, Fugui Mi, Guihua Wang, Xiuwen Huo, Shujun Dong
Studies On The Expression Of Exogenous P5cs Gene In Transgenic Wheatgrasses, Fugui Mi, Guihua Wang, Xiuwen Huo, Shujun Dong
IGC Proceedings (1977-2023)
No abstract provided.
Effects Of Polyethylene Glycol (Peg)‐Simulated Drought Stress On Chamecytisus Palmensis Seed Germination, Zhongju Meng, Yong Gao
Effects Of Polyethylene Glycol (Peg)‐Simulated Drought Stress On Chamecytisus Palmensis Seed Germination, Zhongju Meng, Yong Gao
IGC Proceedings (1977-2023)
No abstract provided.
Photosynthesis And Transpiration Of Chicory With Different Irrigation Treatments In Beijing, Lin Meng, Yingjun Zhang, Peichun Mao, Guofang Zhang
Photosynthesis And Transpiration Of Chicory With Different Irrigation Treatments In Beijing, Lin Meng, Yingjun Zhang, Peichun Mao, Guofang Zhang
IGC Proceedings (1977-2023)
No abstract provided.
Study On The Water Use Of Chicory In Beijing Of China, Lin Meng, Yingjun Zhang, Peichun Mao, Guofang Zhang
Study On The Water Use Of Chicory In Beijing Of China, Lin Meng, Yingjun Zhang, Peichun Mao, Guofang Zhang
IGC Proceedings (1977-2023)
No abstract provided.
Assessing Genetic Diversity Of Elymus Sibiricus (Poaceae: Triticeae) Populations From Qinghai‐Tibet Plateau By Issr Markers, Xiao Ma, Xinquan Zhang, Yonghong Zhou, Shiqie Bai
Assessing Genetic Diversity Of Elymus Sibiricus (Poaceae: Triticeae) Populations From Qinghai‐Tibet Plateau By Issr Markers, Xiao Ma, Xinquan Zhang, Yonghong Zhou, Shiqie Bai
IGC Proceedings (1977-2023)
No abstract provided.
A Preliminary Study Of The Diurnal Dynamics Of Photosynthetic Rate Of Three Grasses, Ming Ma, Z. L. Wang, Q. Z. Sun
A Preliminary Study Of The Diurnal Dynamics Of Photosynthetic Rate Of Three Grasses, Ming Ma, Z. L. Wang, Q. Z. Sun
IGC Proceedings (1977-2023)
No abstract provided.
Extensive Morphological Variability In Asexually Produced Planktic Foraminifera, Catherine V. Davis, Caitlin M. Livsey, Hannah M. Palmer, Pincelli M. Hull, Ellen Thomas, Tessa M. Hill, Claudia R. Benitez-Nelson
Extensive Morphological Variability In Asexually Produced Planktic Foraminifera, Catherine V. Davis, Caitlin M. Livsey, Hannah M. Palmer, Pincelli M. Hull, Ellen Thomas, Tessa M. Hill, Claudia R. Benitez-Nelson
Faculty Publications
Marine protists are integral to the structure and function of pelagic ecosystems and marine carbon cycling, with rhizarian biomass alone accounting for more than half of all mesozooplankton in the oligotrophic oceans. Yet, understanding how their environment shapes diversity within species and across taxa is limited by a paucity of observations of heritability and life history. Here, we present observations of asexual reproduction, morphologic plasticity, and ontogeny in the planktic foraminifer in laboratory culture. Our results demonstrate that planktic foraminifera reproduce both sexually and asexually and demonstrate extensive phenotypic plasticity in response to nonheritable factors. These two processes fundamentally explain …
Plant And Soil Responses To Sediment Deposition And Nutrient Enrichment In Healthy, Deteriorating, And Newly Created Coastal Marshes In Barataria Basin, Louisiana: Implications For Mississippi River Sediment Diversions, Gina N. Groseclose
LSU Master's Theses
To offset wetland loss in the Mississippi River Delta, sediment diversions that will re-introduce river water and sediment into wetlands are being planned for the lower Mississippi River. River diversions will also deliver high nutrient loads, which may reduce belowground plant productivity, reducing inputs of organic matter important for marsh accretion to keep pace with sea-level rise. However, belowground productivity responses to the combinatory effects of sediment and nutrients are unknown. To test the hypotheses that nutrient enrichment and sediment deposition interact to influence vegetation structure, belowground plant productivity and decomposition, and surface accretion, a field experiment was implemented in …
Effects Of Different Factors On The Hypocotyls Protoplast Isolation Of Common Sainfoin, Yupeng Luo, Bo Zhang, Aiping Chen
Effects Of Different Factors On The Hypocotyls Protoplast Isolation Of Common Sainfoin, Yupeng Luo, Bo Zhang, Aiping Chen
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.
Study On Foliar Photosynthetic Physiology Characteristics Of Setaria Sphacelata, Fucheng Luo, Jianfu Wu, Zhenzhong Sun
Study On Foliar Photosynthetic Physiology Characteristics Of Setaria Sphacelata, Fucheng Luo, Jianfu Wu, Zhenzhong Sun
IGC Proceedings (1977-2023)
No abstract provided.
Phosphorus Variability In The Area Of Influence Of The Mid-Barataria Sediment Diversion, Peter Mates
Phosphorus Variability In The Area Of Influence Of The Mid-Barataria Sediment Diversion, Peter Mates
LSU Master's Theses
Man-made levees along the lower Mississippi River prevent delivery of sediment from building and maintaining Louisiana’s coastal wetlands. The Mid-Barataria sediment diversions is designed to reintroduce Mississippi River water, sediment, and nutrients into the sediment-starved Barataria Basin. Phosphorus (P) is an important macronutrient for regulating primary production in coastal marine ecosystems. Wetlands can serve as a sink or source for phosphorus to the overlying water column through various retention and release processes, dependent on concentration. Louisiana coastal systems can be phosphorus limited due to much higher concentrations of bioavailable Nitrogen in river water. The high soluble molar N:P ( >50:1) …
Relationships Between Vegetation And Soil Seed Banks Along A Center-To-Edge Gradient On A Tropical Coral Island, Yao Huang, Hai Ren, Jun Wang, Nan Liu, Shuguang Jian, Hongyue Cai, Dafeng Hui, Qinfeng Guo
Relationships Between Vegetation And Soil Seed Banks Along A Center-To-Edge Gradient On A Tropical Coral Island, Yao Huang, Hai Ren, Jun Wang, Nan Liu, Shuguang Jian, Hongyue Cai, Dafeng Hui, Qinfeng Guo
Biology Faculty Research
Few studies have focused on the relationships between vegetation and soil seed banks on small islands. To better understand the pattern and regeneration potential of seed banks on tropical coral islands, we measured environmental factors and the species composition, and species richness of soil seed banks and vegetation along a gradient from the center to the edges on East Island in the South China Sea. The results showed that the similarity between the species composition of vegetation and seed banks increased from the center to the edge. In the center, species richness in both vegetation and seed banks was positively …
Early Paleogene Biosiliceous Sedimentation In The Atlantic Ocean: Testing The Inorganic Origin Hypothesis For Paleocene And Eocene Chert And Porcellanite, Jakub Witkowski, Donald E. Penman, Karolina Bryłka, Bridget S. Wade, Sabine Matting, David M. Harwood, Steven M. Bohaty
Early Paleogene Biosiliceous Sedimentation In The Atlantic Ocean: Testing The Inorganic Origin Hypothesis For Paleocene And Eocene Chert And Porcellanite, Jakub Witkowski, Donald E. Penman, Karolina Bryłka, Bridget S. Wade, Sabine Matting, David M. Harwood, Steven M. Bohaty
Department of Earth and Atmospheric Sciences: Faculty Publications
The widespread occurrence of lower Eocene chert and porcellanite has been viewed as a major paleoceanographic issue since the advent of ocean drilling, and both biotic and abiotic forcings have been proposed to explain it. We present a reconstruction of indurated siliceous sediment (ISS) and preserved biosiliceous sediment (PBS) occurrences in the Atlantic Ocean through the Paleocene and Eocene (~66 through 34 Ma). ISS and PBS distributions reveal dissimilar temporal trends, with the peak of ISS occurrences coinciding with the Early Eocene Climatic Optimum, in line with previous studies. PBS occurrences show a generally increasing trend culminating between 44 and …
Character Of Canopy Apparent Photosynthesis And Transpiration In Seriphidium Semidesert Under Different Degradation Gradient, W. H. Lu, J. Z. Zhu, G. L. Jin, D. J. Wang, H. L. Liu
Character Of Canopy Apparent Photosynthesis And Transpiration In Seriphidium Semidesert Under Different Degradation Gradient, W. H. Lu, J. Z. Zhu, G. L. Jin, D. J. Wang, H. L. Liu
IGC Proceedings (1977-2023)
No abstract provided.
Study On Amf In Rhizosphere Of Vetiver Grass In Field Nursery, Lixia Gao, Xuhui Kong, Yu Chen, Chonglu Zhong
Study On Amf In Rhizosphere Of Vetiver Grass In Field Nursery, Lixia Gao, Xuhui Kong, Yu Chen, Chonglu Zhong
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.
Research On Community Dominance And Functional Groups After Sandy Land Enclosed, Yan Liu, Fengling Shi, Bo Zhao, Ying Liu, Xiaohong Wang
Research On Community Dominance And Functional Groups After Sandy Land Enclosed, Yan Liu, Fengling Shi, Bo Zhao, Ying Liu, Xiaohong 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.
The Medium-Term And Event-Scale Tropical Cyclone-Driven Morphodynamics Of A Vulnerable Barrier System With Emphasis On The Role Of Backbarrier Wetlands, Cody Lee Johnson I
The Medium-Term And Event-Scale Tropical Cyclone-Driven Morphodynamics Of A Vulnerable Barrier System With Emphasis On The Role Of Backbarrier Wetlands, Cody Lee Johnson I
LSU Doctoral Dissertations
Coastal mainland barriers and barrier islands provide the first line of defense against oceanic and meteorological forces. Coastal morphological change, which may degrade these barrier's defensive capabilities, occurs over a range of time scales, from geological epochs (>1000 years) to hours and seconds. Coastal morphological change at a vulnerable, but economically strategic, barrier system---the Caminada-Moreau Headlands, Louisiana---is investigated in terms of tropical cyclone impacts and their effects over a 15 year LIDAR survey time series. Analysis of the barrier's three-dimensional morphodynamics at medium-term (decadal) time scales reveals that, while subaerial volume was approximately conserved through time, the impact of …
A Brief Introduction On Water Conservation And Drought Resistance Technique On Desert Grasslandslope, Tiejun Liu, Jing Li, Jingli He, Hao Rong, Wei Cui
A Brief Introduction On Water Conservation And Drought Resistance Technique On Desert Grasslandslope, Tiejun Liu, Jing Li, Jingli He, Hao Rong, Wei Cui
IGC Proceedings (1977-2023)
No abstract provided.
Trigonella Arcuate Responds To Seriphidium Transillense Desert Degraded Grassland, H. L. Liu, Kun Wang, J. Z. Zhu, J. Wang
Trigonella Arcuate Responds To Seriphidium Transillense Desert Degraded Grassland, H. L. Liu, Kun Wang, J. Z. Zhu, J. Wang
IGC Proceedings (1977-2023)
No abstract provided.
Phylogenetic Relationship Of Leymus Chinensis Revealed By The Its And Chloroplast Trnl‐F Sequences, G. S. Liu, Z. P. Liu
Phylogenetic Relationship Of Leymus Chinensis Revealed By The Its And Chloroplast Trnl‐F Sequences, G. S. Liu, Z. P. Liu
IGC Proceedings (1977-2023)
No abstract provided.
Legacy And Current Pesticide Residues In Syr Darya, Kazakhstan: Contamination Status, Seasonal Variation And Preliminary Ecological Risk Assessment, Daniel D. Snow, P. Chakraborty, B. Uralbekov, B. Satybaldiev, J. Brett Sallach, L. M. Thornton Hampton, M. Jeffries, A. S. Kolok, Shannon L. Bartelt-Hunt
Legacy And Current Pesticide Residues In Syr Darya, Kazakhstan: Contamination Status, Seasonal Variation And Preliminary Ecological Risk Assessment, Daniel D. Snow, P. Chakraborty, B. Uralbekov, B. Satybaldiev, J. Brett Sallach, L. M. Thornton Hampton, M. Jeffries, A. S. Kolok, Shannon L. Bartelt-Hunt
Nebraska Water Center: Faculty Publications
The Syr Darya is one of two major rivers in Central Asia supplying critical fresh water to the Aral Sea. In spite of the river’s importance and agriculturally-intensive history, few studies have provided a modern evaluation of and the occurrence of pesticide residues potential effects to aquatic life. The primary goal of this investigation was to determine seasonal variations in ambient concentrations of modern and legacy pesticides in bottom sediment and water of the Syr Darya in Kazakhstan (KZ) downstream from an agriculturally-intensive watershed in Uzbekistan. Grab samples and passive samplers were used at five remote sampling stations during June …
Decomposability Of Soil Organic Matter Over Time: The Soil Incubation Database (Sidb, Version 1.0) And Guidance For Incubation Procedures, Christina Schadel, Jeffrey Beem-Miller, Mina Aziz Rad, Susan E. Crow, Caitlin E. Hicks Pries, Jessica G. Ernakovich, Alison M. Hoyt, Alain Plante, Shane Stoner, Claire C. Treat, Carlos A. Sierra
Decomposability Of Soil Organic Matter Over Time: The Soil Incubation Database (Sidb, Version 1.0) And Guidance For Incubation Procedures, Christina Schadel, Jeffrey Beem-Miller, Mina Aziz Rad, Susan E. Crow, Caitlin E. Hicks Pries, Jessica G. Ernakovich, Alison M. Hoyt, Alain Plante, Shane Stoner, Claire C. Treat, Carlos A. Sierra
Faculty Publications
The magnitude of carbon (C) loss to the atmosphere via microbial decomposition is a function of the amount of C stored in soils, the quality of the organic matter, and physical, chemical, and biological factors that comprise the environment for decomposition. The decomposability of C is commonly assessed by laboratory soil incubation studies that measure greenhouse gases mineralized from soils under controlled conditions. Here, we introduce the Soil Incubation Database (SIDb) version 1.0, a compilation of time series data from incubations, structured into a new, publicly available, open-access database of C flux (carbon dioxide, CO2, or methane, CH4). In addition, …
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, …