Coastal river discharge and sediment load exert major influence on the sustainability of coastal systems. Controlled by various hydroclimatic/hydrometeorological agents, they exhibit distinct trend/variability at different time scales. Texas, while being a target for tropical cyclones over past 6 decades, has been experiencing drought flood cycles associated with ENSO in long term. However, it ...

ABSTRACT Truncilla macrodon¸ the Texas Fawnsfoot, is currently considered to be restricted Brazos and Colorado river drainages in central Texas, USA. Subfossil specimens resembling T. macrodon from shell middens Trinity drainage have raised questions about its presumptive range. Extant populations occupying are believed donaciformis, but species identity has not been assessed using molecular te...

Abstract The Chicxulub impact (in the northern Yucatan Penninsula, Mexico) marks Cretaceous-Paleogene (K-Pg) boundary and is implicated in one of five major extinctions. Researchers have examined ejecta from impact, most recently a drill core crater itself, yet processes chemical reactions occurring vapor plume are poorly constrained. Rounded carbonate particles, identified as accretionary lapi...

Although hydraulic groundwater (GW) theory has been recognized as a promising tool for understanding the role of aquifer(s) in surface-subsurface hydrologic cycle, integrated modeling community still lacks proper structure to apply well-studied large-scale predictions. This study aims present novel that enables Boussinesq equation-based depiction bidirectional stream-hillslope processes applyin...

Marstonia comalensis, a poorly known nymphophiline gastropod (originally described from Comal Creek, Texas) that has often been confused with Cincinnatia integra, is re-described and the generic placement of this species, which was recently allocated to Marstonia based on unpublished evidence, is confirmed by anatomical study. Marstonia comalensis is a large congener having an ovate-conic, open...

Black willow (Salix nigra Marsh.) has the potential to be a significant feedstock source for bioenergy and biofuels production in the Lower Mississippi Alluvial Valley (LMAV). This potential is based on a number of primary factors including rapid growth, ease of vegetative propagation, excellent rooting, and the ability to regenerate from coppice following harvest. To date, there has been no di...

Stream flow modifications, such as reduced spring flow and construction of low-head dams, have led to declines in the headwater catfish (Ictalurus lupus) across much of its range, as has competition with channel catfish (I. punctatus). Hybridization between headwater catfish and channel catfish also poses a threat to the headwater catfish. Our analyses of cytochrome-b sequences of headwater cat...