Biodegradation of Simazine and Diuron Herbicides under Aerobic and Anoxic Conditions Relevant to Managed Aquifer Recharge of Storm Water          下载免费PDF全文

Ali Shareef  Declan Page  Joanne Vanderzalm  Mike Williams  V. V. S. R. Gupta  Peter Dillon  Rai Kookana 《洁净——土壤、空气、水》2014,42(6):745-752

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Photometric calibration of the Swift ultraviolet/optical telescope     

T. S. Poole  A. A. Breeveld  M. J. Page  W. Landsman  S. T. Holland  P. Roming  N. P. M. Kuin  P. J. Brown  C. Gronwall  S. Hunsberger  S. Koch  K. O. Mason  P. Schady  D. Vanden Berk  A. J. Blustin  P. Boyd  P. Broos  M. Carter  M. M. Chester  A. Cucchiara  B. Hancock  H. Huckle  S. Immler  M. Ivanushkina  T. Kennedy  F. Marshall  A. Morgan  S. B. Pandey  M. de Pasquale  P. J. Smith  M. Still 《Monthly notices of the Royal Astronomical Society》2008,383(2):627-645

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Arm hooks of coleoid cephalopods from the Jurassic succession of the Wessex Basin,Southern England     

M.B. Hart  Z. Hughes  K.N. Page  G.D. Price  C.W. Smart 《Proceedings of the Geologists' Association. Geologists' Association》2019,130(3-4):326-338

The Jurassic succession of the Wessex Basin – especially that cropping out within the Dorset and East Devon Coast World Heritage Site – contains important lagerstätten for coleoid cephalopods. The Blue Lias and Charmouth Mudstone formations of West Dorset, the Oxford Clay Formation of North Wiltshire and the Kimmeridge Clay Formation of Purbeck have provided large numbers of important body fossils that inform our knowledge of coleoid palaeobiology, including the hooks present in the arms. Isolated hooks are also found in the processed residues studied by micropalaeontologists and these occurrences can be used – in some cases – to record the presence of key taxa in the absence of well-preserved body fossils. While some hook morphotypes can be attributed to known species, there are many forms of hook described where the parent animal remains unknown. The present state of our knowledge of the Jurassic assemblages in the Wessex Basin is presented and remaining issues identified.  相似文献   

Entanglement of Australian sea lions and New Zealand fur seals in lost fishing gear and other marine debris before and after Government and industry attempts to reduce the problem   总被引：1，自引：0，他引：1  

Page B  McKenzie J  McIntosh R  Baylis A  Morrissey A  Calvert N  Haase T  Berris M  Dowie D  Shaughnessy PD  Goldsworthy SD 《Marine pollution bulletin》2004,49(1-2):33-42

In recent years, Australian governments and fishing industry associations have developed guiding principles aimed at reducing the impact of fishing on non-target species and the benthos and increasing community awareness of their efforts. To determine whether they reduced seal entanglement in lost fishing gear and other marine debris, we analysed Australian sea lion and New Zealand fur seal entanglement data collected from Kangaroo Island, South Australia. Contrary to our expectations, we found that entanglement rates did not decrease in recent years. The Australian sea lion entanglement rate (1.3% in 2002) and the New Zealand fur seal entanglement rate (0.9% in 2002) are the third and fourth highest reported for any seal species. Australian sea lions were most frequently entangled in monofilament gillnet that most likely originated from the shark fishery, which operates in the region where sea lions forage--south and east of Kangaroo Island. In contrast, New Zealand fur seals were most commonly entangled in loops of packing tape and trawl net fragments suspected to be from regional rock lobster and trawl fisheries. Based on recent entanglement studies, we estimate that 1478 seals die from entanglement each year in Australia. We discuss remedies such as education programs and government incentives that may reduce entanglements.  相似文献   

Importance of Vascular Plant and Algal Production to Macro-invertebrate Consumers in a Southern California Salt Marsh     

H.M. Page 《Estuarine, Coastal and Shelf Science》1997,45(6):823-834

The dietary importance of marsh vascular plants (primarilySalicornia virginica), algae and upland particulate inputs to macro-invertebrate consumers was studied in Carpinteria Salt Marsh, southern California, using stable carbon and nitrogen isotope ratios. This marsh is predominantly a marine or hypersaline system and succulents are the most common vascular plant species. Of invertebrates collected from the vegetated marsh, tidal flats and channels, only detritivores from the vegetated marsh (Traskorchestia traskiana,Melampus olivaceus) had isotope values (δ¹³C=−20‰) that suggested some use ofSalicornia-derived carbon.T. traskianacultured in the laboratory on decomposingS. virginicaor blue-green micro-algal mat had distinctive isotopic signatures, reflecting the capability of this consumer to assimilate carbon and nitrogen derived from these sources. The δ¹³C values (generally −16‰ to −15‰) of species from tidal flats and channels (e.g.Cerithidea californica,Protothaca staminea,Mytilus galloprovincialis,Neotrypaea californiensis) were most similar to values for benthic algae and phytoplankton. Specimens ofM. galloprovincialisalong a gradient of presumed increase in marine influence had similar isotope values, suggesting little contribution to diet from upland runoff. The present results differ most noticeably from published values in the¹³C enrichment of suspension-feeders, suggesting the use of resuspended¹³C-enriched benthic microalgae in tidal channels by these consumers, and in the¹³C depletion and¹⁵N enrichment of plants and consumers along a portion of the marsh boundary receiving inputs of nutrient-enriched perched groundwater. In general, the isotopic composition of macro-invertebrates indicated the incorporation of algal production rather than ofS. virginicaor upland sources into the marsh food web.  相似文献   

Channel Change on the Lower Manawatu River     

K. J. Page  Ft. G. Heerdegen 《New Zealand geographer》1985,41(1):35-38

¹Lecturer in Geography, School of Applied Science, Riverina College of Advanced Education, Wagga Wagga, NSW 2650, Australia
²Senior Lecturer in Geography, Massey University, Palmerston North, New Zealand  相似文献   

Use of the Electrical Resistivity Method for Investigating Geologic and Hydrologic Conditions in Santa Clara County, California     

Leo M. Page 《Ground water》1968,6(5):31-40

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Interruptions of the ancient Shu Civilization: triggered by climate change or natural disaster?     

Xingyue Wen  Song Bai  Na Zeng  C. Page Chamberlain  Chengshan Wang  Chengmin Huang  Qing Zhang 《International Journal of Earth Sciences》2013,102(3):933-947

Environmental proxies of a stable carbon isotope, total organic carbon, free iron oxide, and particle size distribution in sediments as well as the stable carbon and oxygen isotopes in fossil human and animal teeth were used to reconstruct the history of climate change and natural disasters near the Jinsha Relic Site and to track their effect on the ancient Shu Civilization, which was established in the Chengdu Plain of southwest China during the late Holocene. In general, the late Holocene climate in the Chengdu Plain demonstrated a drying and cooling trend, with evident cooler events ~4100 and ~2700 a BP, which coincided with global climate changes. The ancient Shu Civilization was interrupted twice, and it included three stages—the Baodun (4700–3700 a BP), the Sanxingdui (3700–3150 a BP), and the Shi’erqiao (3150–2600 a BP)—that were slightly related to the abrupt climate changes that resulted from the collapse of the classic Sanxingdui Civilization, which was founded in a regional warm period. The abrupt increase in sand content in the sediment from the Jinsha Site coincided with the palaeoearthquake and palaeodam burst in the Longmen Mountains when the Baodun and Shi’erqiao desisted, indicating that a flood had occurred due to a dam burst and may likely have caused the ancient civilization’s destruction. Although the warm and humid climate, flat terrain and rich water resources prompted the prosperity of the ancient towns of Sanxingdui and Jinsha, frequent natural disasters, such as powerful earthquakes, landslide dams, and outburst floods, consistently affected the ancient Shu inhabitants.  相似文献   

Intrinsic bioremediation of a petroleum-impacted wetland   总被引：4，自引：0，他引：4  

Mills MA  Bonner JS  McDonald TJ  Page CA  Autenrieth RL 《Marine pollution bulletin》2003,46(7):887-899

Following the 1994 San Jacinto River flood and oil spill in southeast Texas, a petroleum-contaminated wetland was reserved for a long-term research program to evaluate bioremediation as a viable spill response tool. The first phase of this program, presented in this paper, evaluated the intrinsic biodegradation of petroleum in the contaminated wetland. Sediment samples from six test plots were collected 11 times over an 11-month period to assess the temporal and spatial petroleum concentrations. Petroleum concentrations were evaluated using gas chromatography-mass spectrometer analyses of specific target compounds normalized to the conservative biological marker, C(30)17alpha,21beta(H)-hopane. The analyses of specific target compounds were able to characterize that significant petroleum biodegradation had occurred at the site over the one-year period. Total resolved saturate and total resolved aromatic hydrocarbon data indicated the petroleum was degraded more than 95%. In addition, first-order biodegradation rate constants were calculated for the hopane-normalized target compounds and supported expected biodegradation patterns. The rapid degradation rates of the petroleum hydrocarbons are attributed to conditions favorable to biodegradation. Elevated nutrient levels from the flood deposition and the unconsolidated nature of the freshly deposited sediment possibly provided a nutrient rich, oxic environment. Additionally, it is suggested that an active and capable microbial community was present due to prior exposure to petroleum. These factors provided an environment conducive for the rapid bioremediation of the petroleum in the contaminated wetland.  相似文献   

Preliminary report on a dinosaur tracksite from Lower Cretaceous strata in Mount Lebanon     

Raymond Gèze  Isabelle Veltz  Jean-Claude Paicheler  Bruno Granier  Roland Habchi  Dany Azar  Sibelle Maksoud 《Arabian Journal of Geosciences》2016,9(19):730

A dinosaur tracksite was discovered in Batha on the side of the road from Harissa to Ghosta (Keserwan, Lebanon). About ten trackways are exposed at the top of two beds of Lower Cretaceous limestones over an area of approximately 1000 m². These footprints were probably made by at least two dinosaur species, Sauropoda and either Theropoda or Ornithopoda. The site, which is the first record from Lebanon, should be protected to allow further scientific investigations.  相似文献