Physical Sciences and Mathematics Commons^™

Investigation Of Lfa Model Application For Determination Rangeland’S Function In Exclude And Open Range In Hamadan Province, Iran, M. R. Sadeghimanesh, Hossein Arzani, A. Mokhtariasl, E. Alizada

IGC Proceedings (1997-2023)

No abstract provided.

Changes On Seed Bank Composition Of Flooding Pampa Rangeland By The Use Of Glyphosate, A. Rodriguez, E. J. Jacobo, J. Zandueta

IGC Proceedings (1997-2023)

No abstract provided.

Triple Oxygen Isotope Composition Of Carbonates, Jordan A.G. Wostbrock

Earth and Planetary Sciences ETDs

This dissertation presents a method of analyzing the triple oxygen isotope compositions of carbonates, presents an empirical calibration of the carbonate-water equilibrium fractionation line, presents a triple oxygen isotope equipped fluid-rock mixing model for carbonates to see-through diagenesis, and applies all these findings to ancient carbonate samples. Using modern carbonates and associate water, the following equations are calculated to describe equilibrium triple oxygen isotope fractionation of carbonates:

1000lnalpha¹⁸O_cc-wt=2.84x10⁶/T²-2.96 1),

Theta_cc-wt=-1.39/T+0.5305 2).

Using these fractionation equations provides an extremely useful tool to determine whether a carbonate sample is altered or preserves …

Neogene Drainage Reversal And Colorado Plateau Uplift In The Salt River Area, Jordan Curtis Anderson

Earth and Planetary Sciences ETDs

The modern Salt River flows southwest from the Colorado Plateau, through the Arizona Transition Zone and into to the Basin and Range. Rivers in this area flowed northeast during the Paleogene from the Laramide Mogollon Highlands into structural basins of the topographically lower southern Colorado Plateau area. One of these rivers carved the Salt River paleocanyon through a portion of the Mogollon Highlands known as the Apache Uplift to similar depths as the modern Grand Canyon. This study refines the timing of this drainage reversal in the Salt River area by constraining the ages of paleoriver sediments deposited during the …

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 (1997-2023)

No abstract provided.

The Study On Growth And Yield Changes Dynamic Laws Of Xinjiang Small Reed (Phragmites Australis), Abdurahman Metniyaz, Ainiwaer Aishan, Ataku K.

IGC Proceedings (1997-2023)

No abstract provided.

Grazing Impacts On Natural Steppe Community Of Eastern Mongolia, N. Narantuya

IGC Proceedings (1997-2023)

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

IGC Proceedings (1997-2023)

No abstract provided.

Studies On The Expression Of Exogenous P5cs Gene In Transgenic Wheatgrasses, Fugui Mi, Guihua Wang, Xiuwen Huo, Shujun Dong

IGC Proceedings (1997-2023)

No abstract provided.

Effects Of Polyethylene Glycol (Peg)‐Simulated Drought Stress On Chamecytisus Palmensis Seed Germination, Zhongju Meng, Yong Gao

IGC Proceedings (1997-2023)

No abstract provided.

Photosynthesis And Transpiration Of Chicory With Different Irrigation Treatments In Beijing, Lin Meng, Yingjun Zhang, Peichun Mao, Guofang Zhang

IGC Proceedings (1997-2023)

No abstract provided.

Study On The Water Use Of Chicory In Beijing Of China, Lin Meng, Yingjun Zhang, Peichun Mao, Guofang Zhang

IGC Proceedings (1997-2023)

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

IGC Proceedings (1997-2023)

No abstract provided.

A Preliminary Study Of The Diurnal Dynamics Of Photosynthetic Rate Of Three Grasses, Ming Ma, Z. L. Wang, Q. Z. Sun

IGC Proceedings (1997-2023)

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

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 …

Effects Of Different Factors On The Hypocotyls Protoplast Isolation Of Common Sainfoin, Yupeng Luo, Bo Zhang, Aiping Chen

IGC Proceedings (1997-2023)

No abstract provided.

A Study Of Forage Germplasm Resources And Their Utilization In Heilongjiang Province China, Xinyin Luo, Hong Li, Haiyang You

IGC Proceedings (1997-2023)

No abstract provided.

Study On Foliar Photosynthetic Physiology Characteristics Of Setaria Sphacelata, Fucheng Luo, Jianfu Wu, Zhenzhong Sun

IGC Proceedings (1997-2023)

No abstract provided.

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) …

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 …

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 …

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 (1997-2023)

No abstract provided.

Study On Amf In Rhizosphere Of Vetiver Grass In Field Nursery, Lixia Gao, Xuhui Kong, Yu Chen, Chonglu Zhong

IGC Proceedings (1997-2023)

No abstract provided.

Studies On Root Turion Propagation Technology Of Wild Hazelnut In Daxing'anling, China, Yuliang Liu, Fugui Mi, Puchang Wang

IGC Proceedings (1997-2023)

No abstract provided.

Research On Community Dominance And Functional Groups After Sandy Land Enclosed, Yan Liu, Fengling Shi, Bo Zhao, Ying Liu, Xiaohong Wang

IGC Proceedings (1997-2023)

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

IGC Proceedings (1997-2023)

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

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

IGC Proceedings (1997-2023)

No abstract provided.

Trigonella Arcuate Responds To Seriphidium Transillense Desert Degraded Grassland, H. L. Liu, Kun Wang, J. Z. Zhu, J. Wang

IGC Proceedings (1997-2023)

No abstract provided.

Phylogenetic Relationship Of Leymus Chinensis Revealed By The Its And Chloroplast Trnl‐F Sequences, G. S. Liu, Z. P. Liu

IGC Proceedings (1997-2023)

No abstract provided.