Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Geology (5202)
- Environmental Sciences (555)
- Life Sciences (548)
- Soil Science (478)
- Plant Sciences (429)
-
- Agronomy and Crop Sciences (386)
- Agricultural Science (384)
- Plant Pathology (361)
- Weed Science (361)
- Plant Biology (359)
- Engineering (308)
- Sustainability (282)
- Oil, Gas, and Energy (260)
- Mining Engineering (252)
- Oceanography and Atmospheric Sciences and Meteorology (152)
- Hydrology (142)
- Geophysics and Seismology (108)
- Other Earth Sciences (94)
- Social and Behavioral Sciences (88)
- Other Environmental Sciences (79)
- Geochemistry (74)
- Water Resource Management (67)
- Geomorphology (62)
- Geography (52)
- Climate (49)
- Environmental Monitoring (46)
- Biogeochemistry (45)
- Sedimentology (44)
- Institution
-
- Western Michigan University (4853)
- University of Kentucky (403)
- China Coal Technology and Engineering Group (CCTEG) (252)
- University of Nebraska - Lincoln (111)
- University of Texas Rio Grande Valley (57)
-
- Boise State University (49)
- TÜBİTAK (37)
- University of South Florida (31)
- University of Arkansas, Fayetteville (28)
- University of Nevada, Las Vegas (28)
- City University of New York (CUNY) (25)
- Portland State University (24)
- Montclair State University (23)
- Old Dominion University (22)
- University of South Carolina (22)
- Chapman University (21)
- University of New Hampshire (19)
- Louisiana State University (17)
- Missouri University of Science and Technology (17)
- West Virginia University (17)
- Utah State University (16)
- South Dakota State University (15)
- University of New Mexico (14)
- University of Texas at Arlington (13)
- The University of Southern Mississippi (12)
- Central Washington University (11)
- Chulalongkorn University (11)
- Mississippi State University (11)
- University of Dar es Salaam (11)
- Clemson University (10)
- Keyword
-
- Climate change (35)
- Geology (29)
- Remote sensing (20)
- Geochemistry (18)
- Hydrology (18)
-
- Machine learning (18)
- Groundwater (17)
- Nitrogen (16)
- Drought (15)
- Geophysics (14)
- Grassland (14)
- Water (13)
- Climate (12)
- GIS (12)
- Grazing (11)
- Soil (11)
- Soil health (11)
- Biodiversity (10)
- CGISS (10)
- Coalbed methane (10)
- Conservation (10)
- Karst (10)
- Biogeochemistry (9)
- Forage (9)
- Grasslands (9)
- Kentucky (9)
- Numerical simulation (9)
- Pastoralism (9)
- Seismology (9)
- Stable isotopes (9)
- Publication
-
- Thin Sections (3688)
- Legacy Color Lithology Strip Logs (1152)
- IGC Proceedings (1977-2023) (359)
- Coal Geology & Exploration (252)
- United States Geological Survey: Staff Publications (47)
-
- Geosciences Faculty Publications and Presentations (43)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (42)
- Turkish Journal of Earth Sciences (37)
- Faculty Publications (35)
- Theses and Dissertations (28)
- Electronic Theses and Dissertations (26)
- Graduate Theses and Dissertations (20)
- Publications and Research (15)
- Dissertations and Theses (14)
- Geoscience Faculty Research (14)
- Department of Earth and Environmental Studies Faculty Scholarship and Creative Works (13)
- Earth and Planetary Sciences ETDs (12)
- Graduate Theses, Dissertations, and Problem Reports (ETD) (12)
- LSU Master's Theses (12)
- School of Geosciences Faculty and Staff Publications (12)
- School of Natural Resources: Dissertations, Theses, and Student Research (12)
- Biology, Chemistry, and Environmental Sciences Faculty Articles and Research (11)
- Chulalongkorn University Theses and Dissertations (Chula ETD) (11)
- Contract Reports--KGS (11)
- Department of Earth and Atmospheric Sciences: Faculty Publications (11)
- Tanzania Journal of Science (11)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (10)
- Dissertations (10)
- Graduate Research Theses & Dissertations (10)
- Graduate Theses/Dissertations (10)
- Publication Type
- File Type
Articles 5761 - 5790 of 6505
Full-Text Articles in Earth Sciences
Isotopic Δ15N Signature Of Grass-Alone And Grass-Legume Tropical Pastures To Estimate Sources Of Nitrogen To Grasses In Farmer Managed Pastures, Daniel M. Villegas, J. Velasquez, J. Arango, K. Obregon, Idupulapati M. Rao, G. Rosas, A. Oberson
Isotopic Δ15N Signature Of Grass-Alone And Grass-Legume Tropical Pastures To Estimate Sources Of Nitrogen To Grasses In Farmer Managed Pastures, Daniel M. Villegas, J. Velasquez, J. Arango, K. Obregon, Idupulapati M. Rao, G. Rosas, A. Oberson
IGC Proceedings (1977-2023)
Vast areas of tropical forest have been converted into pastures sown with introduced grasses (Urochloa spp.). The majority of pastures exist in some stage of degradation, which has dramatic ecological and economic consequences. Our objective was to determine isotopic 15N signature of grass alone and grass-legume pastures to estimate sources of nitrogen (N) to grasses in farmer managed pastures. This work contributes to enhancing the sustainability of tropical pastures in forest margins through the integration of legumes. The overarching hypothesis tested was that legumes associated with grasses will improve nutrient supply via symbiotic fixation and mobilization of soil …
Landscape-Level Impacts Of Mesquite Canopy Cover On Herbaceous Species Composition, D. B. Murray, C. E. Cooper
Landscape-Level Impacts Of Mesquite Canopy Cover On Herbaceous Species Composition, D. B. Murray, C. E. Cooper
IGC Proceedings (1977-2023)
Woody encroachment of mesquite (Prosopis) and acacia (Acacia) species into grasslands has widespread and ongoing impacts on grassland ecosystems. Changes in the herbaceous layer are associated with changes in the canopy cover of these sparse-canopied species, which do not exclude the herbaceous component, but often change species composition under the canopy relative to surrounding open areas. These effects are often differential based on productivity of the site and herbaceous species composition of the grassland. Here we investigated landscape-scale changes in the herbaceous composition resulting from changes in canopy cover of honey mesquite (Prosopis glandulosa) …
Interactive Effects Of Drought And Fire On Co-Existing Woody And Herbaceous Communities In A Temperate Mesic Grassland, R. Keen, J. Nippert, E. Tooley, K. O’Keefe, S. Bachle, M. Sandwick
Interactive Effects Of Drought And Fire On Co-Existing Woody And Herbaceous Communities In A Temperate Mesic Grassland, R. Keen, J. Nippert, E. Tooley, K. O’Keefe, S. Bachle, M. Sandwick
IGC Proceedings (1977-2023)
Increased drought and woody encroachment are likely to have substantial and interactive effects on grassland carbon and water cycling in the future. However, we currently lack necessary information to accurately predict grassland responses to drought-by-fire interactions in areas experiencing woody encroachment. A more thorough understanding of these interactive effects on grass-shrub physiology would improve the effectiveness of demographic vegetation models and refine predictions of future changes in grassland ecosystem function. To this end, we constructed passive rainout shelters over mature Cornus drummondii shrubs and co-existing grasses in two fire treatments (1-year and 4-year burn frequency) at the Konza Prairie Biological …
Interacting Effects Of Disease And Weather Variability On Rangeland Biodiversity Associated With Black-Tailed Prairie Dog (Cynomys Ludovicianus) Colonies, Courtney J. Duchardt, J. D. Hennig, D. Pellatz
Interacting Effects Of Disease And Weather Variability On Rangeland Biodiversity Associated With Black-Tailed Prairie Dog (Cynomys Ludovicianus) Colonies, Courtney J. Duchardt, J. D. Hennig, D. Pellatz
IGC Proceedings (1977-2023)
Rangeland ecosystems worldwide are experiencing novel pressures during the Anthropocene, including land conversion, disease dynamics, non-native species, and climate change. These issues can be compounded in rangelands occupied by burrowing rodents. Often considered keystone species important for maintaining rangeland biodiversity, these species often experience widespread control efforts because of their potential to reduce forage for livestock. We examined the effects of climatic variation and disease on bird communities associated with a North American burrowing rodent, the black-tailed prairie dog (Cynomys ludovicianus). Following an outbreak of sylvatic plague (Yersinia pestis) in the prairie dog population, we observed …
Influence Of Grazing Intensity On Nutrient Concentrations In Grass Tissue: Evidence From Two Savannah Grass Species, C. Munyati
IGC Proceedings (1977-2023)
High grazing intensity can accelerate the recycling of animal nutrients on savannah rangelands through the deposition of dung and, subsequently, nutrient mineralisation, uptake and concentration in grass tissue. The actual magnitude of this influence can vary depending on the grazing system. This study derived grazing system-dependent magnitudes of the influence of grazing intensity on concentrations of major (N, P, K, Ca, Mg, Na) and trace (B, Co, Cu, Cr, Fe, Mn, Mo, Ni, Se, Zn) animal nutrients in above ground grass tissue. Two grass species were examined: Brachiaria nigropedata, a decreaser, and Eragrostis lehmanniana, an increaser. For the …
Mgrre_Thinsections_Mgrre-78a_19, Mgrre
Mgrre_Thinsections_Mgrre-78a_7, Mgrre
Mgrre_Thinsections_Mgrre-78a_25, Mgrre
Mgrre_Thinsections_Mgrre-78a_15, Mgrre
Mgrre_Thinsections_Mgrre-78a_17, Mgrre
Mgrre_Thinsections_Mgrre-78a_1, Mgrre
Mgrre_Thinsections_Mgrre-78a_3, Mgrre
Mgrre_Thinsections_Mgrre-78a_4, Mgrre
Mgrre_Thinsections_Mgrre-78a_6, Mgrre
Mgrre_Thinsections_Mgrre-78a_8, Mgrre
Mgrre_Thinsections_Mgrre-78a_11, Mgrre
Mgrre_Thinsections_Mgrre-78a_10, Mgrre
Mgrre_Thinsections_Mgrre-78a_12, Mgrre
Mgrre_Thinsections_Mgrre-78a_14, Mgrre
Mgrre_Thinsections_Mgrre-78a_17, Mgrre
Mgrre_Thinsections_Mgrre-78a_18, Mgrre
Mgrre_Thinsections_Mgrre-78a_20, Mgrre
Mgrre_Thinsections_Mgrre-78a_21, Mgrre
Mgrre_Thinsections_Mgrre-78a_22, Mgrre
Mgrre_Thinsections_Mgrre-78a_23, Mgrre
Mgrre_Thinsections_Mgrre-78a_24, Mgrre
Mgrre_Thinsections_Mgrre-78a_3, Mgrre
Mgrre_Thinsections_Mgrre-78a_4, Mgrre