We conducted stable 13C and 15N analysis on white shark vertebrae demonstrated that incremental of isotopes along the radius a vertebral centrum produces chronological record dietary information, allowing for reconstruction an individual's trophic history. Isotopic data showed significant enrichments in with increasing sampling distance from center, indicating correlation between body size level. Additionally, isotopic values verified two distinct ontogenetic shifts shark: one following...

Trophic positions (TP) were estimated for the blue shark ( Prionace glauca ), shortfin mako Isurus oxyrinchus thresher Alopias vulpinus and basking Cetorhinus maximus ) using stable isotope ratios of carbon (δ 13 C) nitrogen 15 N). The had lowest TP (3·1) δ N value (10·4‰), whereas highest values (4·5, 15·2‰). Mako sharks showed considerable variation in isotopic values, possibly due to foraging from both inshore offshore waters. Thresher significantly more enriched than sharks, suggesting a...

Invasions of non-native species can suppress biodiversity and alter ecosystem functions, but for many the most widespread invasive mechanisms underlying their success effects on native are poorly understood. Here we evaluated peer-reviewed literature causes impacts invasion by cogongrass (Imperata cylindrica), one problematic plant in southeast US. We assess what is known about why particularly how it affects communities ecosystems, review patterns research methods employed, provide a...

Despite management efforts, studies suggest that the North Atlantic right whale (Eubalaena glacialis) population may still be in decline. Due to its endangered status and propensity for human interactions, it is critical all habitats migratory routes utilised by are identified protected. We conducted incremental stable isotope analysis along baleen plates of three whales, an adult female, a juvenile male neonate male, showing seasonal oscillation patterns d15N d13C values associated with...

While many clonal plants are highly successful invaders, the contribution of integration (i.e. translocation resources among ramets) to invasion is often unknown. We used model simulations ask if would facilitate photosynthate translocation, performance daughter ramets might be enhanced by integration, and shaded benefited relatively more from transferred photosynthate. Then, test augmented emerging for a globally invasive grass ( Imperata cylindrica ), we combined 13 CO 2 pulse‐chase...

Premise of research. Hypotheses to explain nonnative plant invasions often suggest that propagule pressure promotes invasion success. However, interactions between and abiotic or biotic habitat characteristics also may regulate establishment persistence invaders, but they are not tested. Additionally, results from the few published studies considering among factors conflicting, with some finding overwhelms conditions others suggesting environmental play a key role in determining success...

In 1975 the Heatlh Sciences OCLC Users Group (HSOCLCUG) was organized in order to establish a forum for communication, provide information about following National Library of Medicine cataloging practices Cataloging Subsystem, maintain close relations with Medcine and Medical Association represent its constituency OCLC. A newsletter is issued an annual meeting held keep membership informed. As new subsystems have been implemented, HSOCLCUG has studied their impact on health sciences...