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Full-Text Articles in Biology
Vegetative Change On South Padre Island, Texas, Over Twenty Years And Evaluation Of Multispectral Videography In Determining Vegetative Cover And Species Identity, Robert I. Lonard, Frank W. Judd, James H. Everitt, David E. Escobar, Mario A. Alaniz, Isabel Cavazos Iii, M. R. Davis
Vegetative Change On South Padre Island, Texas, Over Twenty Years And Evaluation Of Multispectral Videography In Determining Vegetative Cover And Species Identity, Robert I. Lonard, Frank W. Judd, James H. Everitt, David E. Escobar, Mario A. Alaniz, Isabel Cavazos Iii, M. R. Davis
Biology Faculty Publications and Presentations
A comparative vegetation analysis of an island-wide transect of South Padre Island, Texas, was conducted in 1997 using aerial multispectral digital videography and line intercept ground truth techniques to assess the usefulness of videography in estimating vegetative cover and species identifications. Ground truth data were used to assess vegetative change occurring in the 20 years since the report of Judd et al. (1977) on the vegetation of South Padre Island. Estimates of total cover by ground truth and remote sensing techniques were similar (2.45% difference) on South Padre Island. Thus, airborne multispectral digital videography is an effective technique for assessing …
Cullin-3 Targets Cyclin E For Ubiquitination And Controls S Phase In Mammalian Cells, Jeffrey D. Singer, Mark Gurian-West, Bruce Clurman, James M. Roberts
Cullin-3 Targets Cyclin E For Ubiquitination And Controls S Phase In Mammalian Cells, Jeffrey D. Singer, Mark Gurian-West, Bruce Clurman, James M. Roberts
Biology Faculty Publications and Presentations
Cyclin E is an unstable protein that is degraded in a ubiquitin- and proteasome- dependent pathway. Two factors stimulate cyclin E ubiquitination in vivo: when it is free of its CDK partner, and when it is phosphorylated on threonine 380. We pursued the first of these pathways by using a two-hybrid screen to identify proteins that could bind only to free cyclin E. This resulted in the isolation of human Cul-3, a member of the cullin family of E3 ubiquitin–protein ligases. We found that Cul-3 was bound to cyclin E but not to cyclin E-Cdk2 complexes in mammalian cells, and …
The Biological Flora Of Coastal Dunes And Wetlands. Ipomoea Imperati (Vahl) Griseb., Robert I. Lonard, Frank W. Judd
The Biological Flora Of Coastal Dunes And Wetlands. Ipomoea Imperati (Vahl) Griseb., Robert I. Lonard, Frank W. Judd
Biology Faculty Publications and Presentations
Beach morning glory, Ipomoea imperati (Vahl) Griseb. = I. stolonifera (Cirillo) Gmelin is a pantropical, prostrate vine that is an important pioneer species in the backshore of coastal beaches of six continents and many islands. The landward distribution of beach morning glory is influenced by dispersal and competition, and its seaward distribution is determined by the physical environment acting through movement of seeds away from the water and high seedling mortality in the backshore. It is occasionally found in disturbed sites on barrier islands well inland from the shore. Beach morning glory tolerates low levels of soil nutrients, sand scouring, …
Spatial Learning Of An Escape Task By Young Corn Snakes, Elaphe Guttata Guttata, David A. Holtzman, Terrence W. Haris, Guillermo Aranguren, Elizabeth Bostock
Spatial Learning Of An Escape Task By Young Corn Snakes, Elaphe Guttata Guttata, David A. Holtzman, Terrence W. Haris, Guillermo Aranguren, Elizabeth Bostock
Biology Faculty Publications and Presentations
Spatial learning is critical to most animals for many behaviours necessary to survival. In vertebrates, most studies on spatial learning and memory have been conducted in mammalian and avian species with few studies on reptiles. We examined spatial learning in the corn snake, Elaphe guttata guttata by training 17 young snakes to find the one open shelter in an eight-hole arena, where the entrance was not visible from the arena surface. Over a 16-trial, 4-day training period, snakes showed (1) a significant decrease in the mean latency to the goal, (2) a significant decrease in the mean total distance travelled, …
Current Status Of Northern Beardless-Tyrannulet And Tropical Parula In Bentsen-Rio Grande Valley State Park And Santa Ana National Wildlife Refuge, Southern Texas, Timothy Brush
Biology Faculty Publications and Presentations
There are no published records of Northern Beardless-Tyrannulet (Camptostoma imberbe) and Tropical Parula (Parilla pitiayumi) nesting in the Lower Rio Grande Valley of Texas since the late 1940s. In this 1996- 1998 study, both species were confirmed nesting at Santa Ana National Wildlife Refuge, and Northern Beardless-Tyrannulet was also confirmed at Bentsen Rio Grande Valley State Park. Most Northern Beardless-Tyrannulet nests were between clumps of ball-moss (Tillandsia recurvata) in cedar elm (Ulmus crassifolia) trees, and nests were active from 21 March-23 September. Only fe. males build nests or incubate. Two-three young fledged per successful nest, but three nests were abandoned …
The Ecology And Vocalisations Of Banded Ground-Cuckoo Neomorphus Radiolosus, Bernabé López-Lanús, Karl S. Berg, Ralf Strewe, Paul G. W. Salaman
The Ecology And Vocalisations Of Banded Ground-Cuckoo Neomorphus Radiolosus, Bernabé López-Lanús, Karl S. Berg, Ralf Strewe, Paul G. W. Salaman
Biology Faculty Publications and Presentations
El Cuco-Hormiguero Franjeado Neomorphus radiolosus es un ave rara, con problemas de conservación y cuya información sobre comportamiento y biología es deficiente. Cualquier dato adicional en este aspecto representa un instrumento importante para su conservación. Presentamos nuevos datos sobre su compartamiento en base a individuos observados en la Estación Biológica Jatun Sacha Bilsa, Esmeraldas, Ecuador, y la Reserva El Pangan, Nariño, Colombia.