http://hdl.handle.net/10125/1682 Thu, 23 May 2013 17:58:34 GMT 2013-05-23T17:58:34Z http://hdl.handle.net/10125/22266 A diverse assemblage of infaunal polychaetes and invertebrates was collected in three replicate sand samples from three locations off Grey’s Beach, Waikīkī, O’ahu, Hawai’i. Infauna were extracted over 0.5 mm and 0.25 mm sieves. Specimens from the 0.5 mm fraction were identified and enumerated while those from the 0.25 fraction were qualitatively assessed. Nematodes were the most numerous specimens collected, followed by oligochaetes and harpacticoid copepods. Polychaetes ranked fourth in abundance followed by lesser abundances of thirteen other taxa. The 45 polychaetes were assigned to 15 taxa. The outside station had the highest taxonomic richness compared to both stations within the source-sand area. Polychaetes were predominantly motile, free-living taxa with an omnivorous feeding mode. The second-most-collected taxa were detritivores. Tube-dwelling species were not collected in these samples. Reproduction was evident in only two polychaete individuals of different species. None of the invertebrates collected were unusual or rare in their distribution in shallow Hawaiian sands. Fri, 01 Aug 2008 00:00:00 GMT http://hdl.handle.net/10125/22266 2008-08-01T00:00:00Z Bailey-Brock, Julie H; Krause, Emily R http://hdl.handle.net/10125/22264 Taxa richness and abundance are given for benthic infauna collected from sediments adjacent to ocean outfalls of the Northern District and Agana (Hagatna) Sewage Treatment Plants, Guam, Northern Mariana Islands. This addresses U.S. Environmental Protection Agency requirements of 301(h) waiver permits for baseline data prior to the construction of two new outfalls to replace those currently in operation. Living infauna and sediment-surface-dwelling epifauna were collected with a remote sampler from stations off the Agana and Northern District outfalls. Samplings were done in August 2005, March 2006, and January 2007 at depths of 40 to 92 m. A total of 21,058 invertebrates were collected from both outfall areas over the three sampling years. Polychaetes were the most diverse and abundant component in the three sets of samples, with 9,068 individuals belonging to 229 taxa. Overall, polychaetes were more abundant off Northern District (5,489 individuals) than off Agana (3,579 individuals). Thirty-nine taxa (totaling 11,990 individuals) of other invertebrates were recorded: Anthozoa, Acari, Bryozoa, Cephalochordata, Chaetognatha, Crustacea (9 taxa), Echinodermata (4 taxa), Hemichordata, Hydrozoa, Insecta, Kinorhyncha, Mollusca (5 taxa), Nematoda, Nemertea, Oligochaeta, Phoronida, Platyhelminthes, Porifera, Priapula, Pycnogonida, Sipuncula, Urochordata, and Osteichthyes (a vertebrate chordate). Nematodes were abundant at both sites in the three samplings (4,605 individuals), but the Northern District locality had twice the number (3,053 individuals) of the Agana locality (1,552 individuals). Patterns of polychaete adundance and taxa richness were similar at both sites. Comparing the results of the three samplings revealed that both sites have diverse infaunal communities and that many species are common to both areas. Small differences between stations and samplings may be due to a number of factors, including reproductive events and the additional habitat provided to carbonate borers by coral rubble, shell fragments, and calcareous algae (Halimeda spp.). Sun, 01 Jul 2007 00:00:00 GMT http://hdl.handle.net/10125/22264 2007-07-01T00:00:00Z Bailey-Brock, Julie H; Krause, Emily R http://hdl.handle.net/10125/22262 Wed, 01 Feb 2006 00:00:00 GMT http://hdl.handle.net/10125/22262 2006-02-01T00:00:00Z Fujioka, Roger S; Asahina, Audrey Y; Sato, Dayna M; Yoneyama, Bunnie S http://hdl.handle.net/10125/22261 Sun, 01 Jan 2006 00:00:00 GMT http://hdl.handle.net/10125/22261 2006-01-01T00:00:00Z Babcock, Roger W; Senthill, Atiim; Huang, Tieshi; Chanthawornsawat, Yingyot; Kanpirom, Sumon; Hu, Jing http://hdl.handle.net/10125/22258 Thu, 01 Sep 2005 00:00:00 GMT http://hdl.handle.net/10125/22258 2005-09-01T00:00:00Z Snehota, Michal; Chen, Jingyu; Mohanty, Sanjay; Lichwa, Joseph; Ray, Chittaranjan http://hdl.handle.net/10125/22257 Fri, 01 Apr 2005 00:00:00 GMT http://hdl.handle.net/10125/22257 2005-04-01T00:00:00Z Fujioka, Roger S; Sato, Dayna M; Vithanage, Gayatri; Yoneyama, Bunnie S http://hdl.handle.net/10125/22256 Thu, 01 Jul 2004 00:00:00 GMT http://hdl.handle.net/10125/22256 2004-07-01T00:00:00Z Moreland, Victor http://hdl.handle.net/10125/22255 Mon, 01 Mar 2004 00:00:00 GMT http://hdl.handle.net/10125/22255 2004-03-01T00:00:00Z Fujioka, Roger; Asahina, Audrey http://hdl.handle.net/10125/22254 Wed, 01 Oct 2003 00:00:00 GMT http://hdl.handle.net/10125/22254 2003-10-01T00:00:00Z El-Kadi, Aly I; Fujioka, Roger S; Liu, Clark CK$Yoshida, Kenji; Vithanage, Gayatri; Pan, Yucheng; Farmer, John http://hdl.handle.net/10125/22253 Wed, 01 Oct 2003 00:00:00 GMT http://hdl.handle.net/10125/22253 2003-10-01T00:00:00Z Moncur, James ET http://hdl.handle.net/10125/22252 This report documents the findings for Phase 1 of a three-phase study that is aimed at assessing the status of the Nawiliwili Watershed on Kaua’i and developing a plan for its future protection. The objectives of this phase include utilizing sources of existing information to assess current land use in the area and identifying sources and levels of pollutants believed to be present in the watershed based on past studies relevant to the project area. Sources of information included available documents, persons who are familiar with the area, and questionnaires mailed to concerned individuals. Letters mailed to landowners and operators in the watershed area asked for their input. Information was also obtained at community meetings. The study also benefited from a local advisory committee that included government individuals and environmental groups. Data concurrently collected by the Nawiliwili Bay Watershed Council are also used here. The study concluded that little hard scientific data exist for the Nawiliwili Watershed, especially baseline data. The Hawai’i Department of Health’s current Total Maximum Daily Load (TDML) studies may provide public information that could be useful in assessing the health of the watershed. Since more baseline data are being made available, there is a chance to systematically define changes and trends in the watershed. The study identified sediment, nutrient, and bacterial-contamination problems in the Nawiliwili watershed and bay. Sediment sources include agricultural lands, construction sites, channel alteration, stream erosion, a quarry, and urban runoff. Nutrients originate from agriculture practices, golf courses, cesspools, frosted areas, urban runoff, and wastewater treatment spills. Bacterial contamination originates from cesspools, frosted areas, urban runoff, and wastewater treatment spills. There is, however, a chance that chemicals from other sources are also present. The absence of data has created great uncertainties regarding quantification and assessment of such contaminants. Only the levels of bacterial contamination are defined based on available measurements. Additional studies are needed to assess the existence of other chemicals in the watershed and their respective concentration. There is also a need to assess the various sources of bacterial contamination to define the level of contaminant caused by each. A fairly extensive list of potential sources of pollution has been identified which can provide a base for choosing sites for data collection and for sampling-scheme design. There is a need for new data to confirm these findings. The study used the state of Hawai’i’s web site on the Internet to identify relevant geographic information system maps of the area. There is a need, however, to update land-use information, which has changed in recent years. Finally, there is a need to increase or improve on the availability of public and private information about the watershed and to maintain strong ties and full cooperation between environmental groups and landowners/operators. With availability of information and full cooperation of all parties involved, a better understanding of the various processes will be gained. Developing sound approaches to remediate and protect the watershed is a goal that should be easy to reach. Scientific research can provide methods and approaches to maximize economic benefits from the watershed without negatively affecting the environmental quality. Tue, 01 Oct 2002 00:00:00 GMT http://hdl.handle.net/10125/22252 2002-10-01T00:00:00Z Furness, Monika; El-Kadi, Aly I; Fujioka, Roger S; Moravcik, Philip S http://hdl.handle.net/10125/22250 This study set out to evaluate the biological, chemical and agronomic effects of reclaimed water for irrigation on two golf courses (KGC and LGC) located over a potable aquifer in Central Oahu. Percolate water and grass samples were collected on two soils at background sited (potable water irrigation) and pilot-scale test plots (reclaimed water irrigation) at both golf courses with different managements during the two-year pilot-scale study. The variations in chemical characteristics of percolate samples and the relationships of these changes to soil characteristics (pH, CEC, clay content, etc) and the golf course managements were determined in a general way based on the results of this study. Great differences in soil water content were observed between the soil at LGC (wet) and the soil at KGC (dry), and between the two years of the pilot-test. Fecal contamination will be caused due to reclaimed water irrigation is still in doubt after this study. Significant percolate chloride and sodium concentration increases were found at the LGC test plot but not at the KGC test plot. Nitrate leaching was found to mainly relate to fertilization, irrigation method (amount and schedule), and soil pH. All the percolate samples with nitrate concentrations higher 20 mg/l were found at background sites with high pH. High and constant irrigation rates caused a similar degree leaching at the LGC test plot using reclaimed water as that at the background sites with fertilization and historic irrigation methods. TDS in percolates is not expected to increase significantly with the reclaimed water using the irrigation method applied at the test plots of both golf courses in this study. However, whether or not harmful agronomic effects will occur cannot be determined in this study without samples from the dry season and at the soil surface layer. Suction lysimeters are good for monitoring most of chemical parameters measured and work best at high soil water content, but are not suitable for bacteria monitoring. Sat, 01 Dec 2001 00:00:00 GMT http://hdl.handle.net/10125/22250 2001-12-01T00:00:00Z Zhou, Zhijun; Babcock, Roger W http://hdl.handle.net/10125/22249 Fri, 01 Jun 2001 00:00:00 GMT http://hdl.handle.net/10125/22249 2001-06-01T00:00:00Z Harada, Renee M; El-Kadi, Aly I; Robert, Francoise M http://hdl.handle.net/10125/22247 Sat, 01 Apr 2000 00:00:00 GMT http://hdl.handle.net/10125/22247 2000-04-01T00:00:00Z Fujioka, Roger S; Asahina, Audrey; Moreland, Victor; Unutoa, Tuamasaga http://hdl.handle.net/10125/22246 Sat, 01 Apr 2000 00:00:00 GMT http://hdl.handle.net/10125/22246 2000-04-01T00:00:00Z Fujioka, Roger S; Asahina, Audrey; Moreland, Victor; Unutoa, Tuamasaga http://hdl.handle.net/10125/22245 Wed, 01 Dec 1999 00:00:00 GMT http://hdl.handle.net/10125/22245 1999-12-01T00:00:00Z Fujioka, Roger S; Asahina, Audrey; Moreland, Victor; Unutoa, Tuamasaga http://hdl.handle.net/10125/22244 Wed, 01 Dec 1999 00:00:00 GMT http://hdl.handle.net/10125/22244 1999-12-01T00:00:00Z Fujioka, Roger; Rijal, Geeta http://hdl.handle.net/10125/22243 Wed, 01 Dec 1999 00:00:00 GMT http://hdl.handle.net/10125/22243 1999-12-01T00:00:00Z Babcock, Roger W; Thakur, Sumita http://hdl.handle.net/10125/22242 Mon, 01 Nov 1999 00:00:00 GMT http://hdl.handle.net/10125/22242 1999-11-01T00:00:00Z Babcock, Roger; Amantiad, Elisa; Ishikawa, Christine; Uehara, Mitch http://hdl.handle.net/10125/22241 Mon, 01 Feb 1999 00:00:00 GMT http://hdl.handle.net/10125/22241 1999-02-01T00:00:00Z Wellbrock, Anke; Babcock, Roger W