The present study investigated changes in suspension stability and ecotoxicity of engineered nanoparticles (ENPs) by addition of Suwannee River natural organic matter and aging of stock and test suspensions prior to testing. Acute toxicity tests of silver (Ag), zinc oxide (ZnO), and titanium dioxide (TiO2 ) ENPs with Daphnia magna were carried out following Organisation for Economic Co-operatio...

Similar to most wetlands, the Florida Everglades landscape was altered promote agriculture and human settlement, significantly altering natural hydrologic regime. Once former agricultural land located within National Park (ENP), Hole-in-the-Donut (HID) wetland restoration program became first mitigation bank project in Florida. The HID utilized a technique of complete soil removal effectively e...

For a full estimation of the risk related with the presence of engineered nanoparticles (ENPs) in the environment, the use of the current ecotoxicological methods may prove insufficient. In the study presented herein, various methods of assessment of ecotoxicity were applied to compare the phytotoxicity of three ENPs: nano-ZnO, nano-TiO2 and nano-Ni. The toxicity was assayed both for aqueous so...

The amplitude, origin, and direction of striations in the subtropical gyre are investigated using simulated and analytical multidimensional spectra. Striations, defined as banded structures in the low-frequency motions, account for a noticeable percentage of zonal velocity variability in the east North Pacific (ENP: 258– 428N, 1508–1308W) and central North Pacific (CNP: 108–228N, 1328E–1628W) r...

The conservation of the African savanna elephant (Loxodonta africana) is of prime importance for many African countries. Interactions between elephants and humans are known to induce stress and thereby have the potential to affect elephants' fitness. In Namibia, anthropogenic disturbances are increasing due to increasing human population size and development, particularly near protected areas, ...

Airborne light detection and ranging (LIDAR) measurements derived before and after Hurricanes Katrina and Wilma (2005) were used to quantify the impact of hurricanes and lightning strikes on the mangrove forest at two sites in Everglades National Park (ENP). Analysis of LIDAR measurements covering 61 and 68 ha areas of mangrove forest at the Shark River and Broad River sites showed that the pro...

Unconventional remedies are used by farmers against infectious bursal disease (IBD). This study assessed changes in IBD antibody titres and efficacy of some unconventional IBD. Day old ISA brown pullets were assigned into eight groups (A-H) inoculated with a very virulent virus (vvIBDV) at 21 days age as follows; group A - administered aqueous leaf extract Kaya senegalensis (KS); B, C, D, E, F ...

Chemical compositions of ensiled cassava peels, dried peels and gliricidia on the performance West African Dwarf sheep were evaluated. Twelve grower rams ewes between 5-7 months age allotted to three treatment diets: D1 (control) diet was 100% (GLI) (leaves with bark soft stem), D2 consisted 80% plus 20% (ENP/GNI) while D3 (DP/GLI). The test feeds observed have more comparable crude fibre conte...

Abstract. Water-soluble organic nitrogen (WSON) in marine atmospheric aerosols affect the water solubility, acidity, and light-absorbing properties of aerosol particles, which are important parameters assessing both climate impact biogeochemical cycling bioelements. Size-segregated surface seawater (SSW) samples were simultaneously collected over subtropical North Pacific to investigate origin ...

The ampeliscid amphipod community in the Chirikov Basin of the northern Bering Sea was a focus of study during the 1980s because they were a major food for the Eastern North Pacific (ENP) population of gray whales Eschrichtius robustus. Information from the 1980s benthic investigations, published accounts of ENP gray whale population trends and the occurrence in 1999–2000 of an unusual number o...