Southern pine plantations are increasingly established using herbicides to control herbaceous and/or woody competing vegetation to enhance growth, but little is known about the effect on wood quality. A study was established at 13 southern locations in 1984 to examine the effects of complete control of woody, herbaceous, and woody plus herbaceous competition for the first 3 to 5 years on the gr...

Physical and mechanical properties of Eucalyptus urophylla AbstractEucalyptus urophylla is one the most planted species in world Brazil for presenting excellent productivity, good adaptability to varied types soil climate wide application. The experiment was installed randomized blocks with four replications, linear plots six plants a 3 x 2 m spacing. In this test, 21 progenies were selected t...

Plant hydraulic architecture has been studied extensively, yet we know little about how hydraulic properties relate to species' life history strategies, such as drought and shade tolerance. The prevailing theories seem contradictory. We measured the sapwood (K(s) ) and leaf (K(l) ) hydraulic conductivities of 40 coexisting tree species in a Bolivian dry forest, and examined associations with fu...

Background Pinus (Pinaceae) is the largest existing genus of conifers, with over 100 widely recognized species. Pines are an important source of wood, paper and resins, among others. Genetic improvement of Pinus species is a challenging endeavor. Breeding cycles typically last for decades, significant changes take place in wood properties and growth patterns with the transition from the juvenil...

—Since the 1960s, anthropogenic shifts in the timing and distribution of surface-water flows in the Everglades have pushed back the onset of reproduction in Wood Storks (Mycteria americana). Late nesting increases the probability that juveniles leave the colony during the summer rainy season, when water levels are high and prey animals unavailable. We used satellite telemetry to track firstyear...

Juvenile plants often have tight microhabitat associations because of specific requirements for seed germination and subsequent establishment. Due to their larger size, adults may be more adept at coping with stress. However, few studies consider the role of ontogeny in structuring plant populations, even though phenotypic expression can change through life history. In cypress-tupelo swamps of ...

The purpose of this study is to quantify the importance of turbulent kinetic energy, strain, water velocity, fish depth, and fish distance to wood to the decision making process of overwintering coho salmon during habitat selection. Although many studies have evaluated this habitat selection of salmon, few have included hydraulic variables in the equation, while recent research indicates that t...