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Use of GIS to Determine Potential Sources of Aquatic Invasive Species Invasions into Western South Dakota Reservoirs

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Natural Resources 2020年第2期11卷 39-45页

作者： Jayne Kylee Ecker Ryan Raben greg simpson South Dakota Department of Game Fish and Parks Rapid City SD USA

The spread of Aquatic Invasive Species (AIS) is a constant threat for western US waters. The state of South Dakota detected zebra mussels (Dreissena polymorpha) for the first time at Lewis and Clark Reservoir in 2014. Since then, efforts have been towards preventing their further expansion. To determine possible avenues of infestation westward, we used ArcGIS to map the home zip codes of boaters using four western reservoirs (Belle Fourche Reservoir, Pactola Reservoir, Sheridan Lake and Angostura Reservoir). A 60-mile buffer was used to determine spatial relationships of boater zip codes to establish zebra mussel populations and was considered areas of high risk. We found that there were three instances where a boater came from a high-risk area during the study period. Our results show possible pathways for Dreissena expansion into western South Dakota reservoirs. Most notably is that exposure can occur from either an inter- or intra-state vector. This information confirmed that there is a risk of additional water bodies in South Dakota becoming infected. Based on past studies, prevention is the best method in slowing the expansion of zebra mussels in South Dakota. We suggest three actions, strategically placed decontamination stations, continued public awareness efforts and differentiating boat registration tags on watercraft that are near infested water bodies.

关键词： GIS South Dakota Invasive Species Zebra Mussel

Trout Redd Locations in Two Streams in the Black Hills, South Dakota, USA

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Natural Resources 2017年第2期8卷 94-102页

作者： Bailey Ketelsen greg simpson Michael E. Barnes South Dakota Department of Game Fish and Parks Rapid City SD USA McNenny State Fish Hatchery South Dakota Department of Game Fish and Parks Spearfish SD USA

This study examined the spatial and temporal characteristics of brook trout Salvelinus fontinalis and brown trout Salmo trutta redds in two sites from two creeks in the Black Hills of South Dakota, USA. Spawning began in both streams in early October and continued through mid-November. Significant spatial clustering was only observed on both Rapid Creek sites, where-as random redd development was observed in both of the sites on Box Elder Creek. Based on visual observations, brown trout redds were more abundant in Rapid Creek, where-as brook trout redds were more abundant in Box Elder Creek. Differences in redd clustering could be due to species-specific, geological, or hydrological differences between the

关键词： South Dakota Brook Trout Brown Trout Redds Spawning

Non-Consumptive Activities on a Public Hunting and Fishing Area

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Natural Resources 2014年第14期5卷 876-883页

作者： greg simpson Michael E. Barnes Timothy M. Parker Jill Voorhees South Dakota Department of Game Fish and Parks Rapid City South Dakota USA

The activities of all 1513 individuals who visited a public hunting and fishing area near Spearfish, South Dakota, USA, were recorded from May 16 to August 16, 2006. Over the entire period, slightly less than 60% of the visitors were engaged in fishing, and they accounted for nearly 80% of the total visitation time. Over 40% of the visitors were primarily there for non-consumptive (not hunting or fishing) reasons, including touring (sight-seeing), dog training and exercising, and swimming. Less than 1% of the visitors were there for photography. The percentage of visitors fishing decreased from a high of over 65% in the first 31-day period to less than 50% in the third 31-day period, with nearly all of the non-consumptive activities showing a reverse trend. The percentage of visitors swimming or conducting dog activities doubled from the first to third periods. The percentage of time that visitors spent fishing decreased over time, while the time spent on non-consumptive activities increased. However, the increase in non-consumptive activity time was not necessarily in proportion to the increase in the number of visitors involved with non-consumptive activities. By the final period, more visitors were at the area for touring, dogs, and swimming, than for fishing, but fishing still accounted for most of the visitation time. These results indicate an abundance of non-consumptive activities on a public area purchased and maintained with revenue from consumptive hunting and fishing activities, creating the opportunity for user conflicts and potentially threatening the user-pay model of natural resource conservation.

关键词： Public Land Fishing Hunting Non-Consumptive Activities Dogs Visitation

In situ apatite and carbonate Lu-Hf and molybdenite Re-Os geochronology for ore deposit research:Method validation and example application to Cu-Au mineralisation

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Geoscience Frontiers 2024年第5期15卷 339-354页

作者： Alexander simpson Stijn Glorie Martin Hand Sarah E.Gilbert Carl Spandler Marija Dmitrijeva greg Swain Angus Nixon Jacob Mulder Carsten Münker Department of Earth Sciences University of AdelaideSA 5005Australia Mineral Exploration Cooperative Research Centre University of AdelaideSA 5005Australia Adelaide Microscopy University of AdelaideSA 5005Australia Fortescue Level 287Adelaide TerraceEast PerthWA 6005Australia Institute of Geology und Mineralogy University of Köln50674 KölnGermany British Geological Survey NottinghamUK

The development of laser ablation inductively coupled plasma quadrupole tandem mass spectrometry(LA-ICP-Q-MS/MS)opens new opportunities to rapidly date a variety of hydrothermal *** we present in situ Lu-Hf and Re-Os dates for hydrothermal apatite and molybdenite,*** further report the first in situ Lu-Hf dates for bastnäsite,dolomite,and siderite,and assess their potential for constraining ore deposit *** method validation,we report isotope-dilution Lu-Hf dates for apatite reference material Bamble-1(1102±5 Ma)and calcite reference material ME-1(1531±7 Ma),enabling improved accuracy on matrix-matched calibration for LA-ICP-MS/MS Lu-Hf *** new methods are applied to the Vulcan Iron-Oxide Copper-Gold(IOCG)prospect in the Olympic Cu-Au Province of South *** deposits have been difficult to accurately date,given the general lack of reliable mineral geochronometers that are cogenetic with IOCG *** apatite Lu-Hf dates and molybdenite Re-Os dates demonstrate that mineralisation at Vulcan largely occurred at ca.1.6 Ga,contemporaneous with the world class Olympic Dam *** data also indicates that the Lu-Hf system in apatite is more robust than the U-Pb system for determining the timing of primary apatite formation in an IOCG *** further demonstrate that dolomite can retain Lu-Hf growth ages over an extended time period(>1.5 billion years),providing constraints on the timing of primary ore mineral crystallisation during brecciation and IOCG ***,late Neoproterozoic(ca.589–544 Ma)and Carboniferous(ca.334±7 Ma)Lu-Hf dates were obtained for texturally late Cubearing carbonate veins,illustrating that the carbonate Lu-Hf method allows direct dating of Cu remobilisation *** has important implications for mineral exploration as the remobilised Cu may have been transferred to younger deposits hosted in Neoproterozoic sedimentary basins overlaying the Olympic IOCG provi

关键词： Reaction-cell ICP-MS In-situ geochronology Lu-Hf Re-Os Iron Oxide Copper Gold Metal fluids

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饲料风味剂对断奶前仔猪生产性能的影响

养猪 2011年第4期 34-35页

作者： greg simpson 冯占雨

中国的饲料生产商经常在幼龄动物包括哺乳仔猪的饲料中添加风味剂,他们希望添加这些物质能提高动物的采食量进而促进其生长和发育。但测定仔猪对风味剂的反应不同于一般的生产性能试验,需要进行严谨的试验设计才能准确地评估其效果。据... 详细信息

中国的饲料生产商经常在幼龄动物包括哺乳仔猪的饲料中添加风味剂,他们希望添加这些物质能提高动物的采食量进而促进其生长和发育。但测定仔猪对风味剂的反应不同于一般的生产性能试验,需要进行严谨的试验设计才能准确地评估其效果。据笔者了解,多数饲料厂商目前在饲料中使用风味剂更多的是为了讨好客户,对于其实际效果并没有进行准确系统地评估。这篇文章对风味剂的使用效果以及评估方法进行了论述,值得一读。除了本文所述的内容,笔者也在实证研究中发现,无论饲料中是否添加风味剂,仔猪的采食行为都有明显的位置偏好反应(见《饲料工业》2010年24期以及《饲料广角》2010年23期),所以在风味剂偏好试验中应该考虑位置对采食的影响,才能对此进行准确的评估。希望这些知识能对大家正确认识风味剂在饲料中的作用有所帮助。

关键词：饲料风味剂哺乳仔猪生产性能断奶前评估方法《饲料广角》《饲料工业》幼龄动物

Brown Trout Spawn Timing, Redd Locations, and Stream Characteristics in Spearfish Creek within Spearfish, South Dakota, USA

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Open Journal of Ecology 2020年第4期10卷 177-188页

作者： Shaylee Martling greg simpson Jeremy L. Kientz Alex J. Rosburg Michael E. Barnes South Dakota Department of Game Fish and Parks Cleghorn Springs State Fish Hatchery Rapid City SD USA South Dakota Department of Game Fish and Parks Outdoor Campus West Rapid City SD USA South Dakota Department of Game Fish and Parks McNenny State Fish Hatchery Spearfish SD USA

This study documented brown trout (Salmo trutta) spawning locations, redd construction timing, and associated environmental variables in an 850-m long mainstem section and a 400-m long diversion channel of Spearfish Creek within the city limits of Spearfish, South Dakota, USA in 2019. The first redds were observed on October 15, with no new redds observed after November 12. Redd construction peaked during the first week of November, when 23 redds were observed in the mainstem section and 50 in the diversion channel. Substrate size was significantly smaller, water temperatures significantly higher, and water velocities significantly greater in redd versus non-redd locations in both the mainstem reach and the diversion channel (P ˚C), but significant, increase in water temperature from the rest of the channel locations. This is the first study to document redd locations in Spearfish Creek and will provide a baseline to evaluate future spawning activity, particularly as it may be affected by likely future anthropogenic changes potentially affecting the stream environment.

关键词： Brown Trout Salmo trutta Spawning Redds Black Hills South Dakota

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日粮内添加DDGS可以改善肉质

国外畜牧学（猪与禽） 2011年第3期31卷 27-28页

作者：翟文栋 greg simpson

对北美的大多数养猪生产者而言,现在可溶性干酒糟(Distillers Dried Grainswith Solubles,DDGS)的使用非常普遍。然而,研究和田间试验显示尽管DDGS是一种重要的饲料成分,但需要应用适当的饲喂策略以使得饲料成本和猪肉品质均达到最佳化... 详细信息

对北美的大多数养猪生产者而言,现在可溶性干酒糟(Distillers Dried Grainswith Solubles,DDGS)的使用非常普遍。然而,研究和田间试验显示尽管DDGS是一种重要的饲料成分,但需要应用适当的饲喂策略以使得饲料成本和猪肉品质均达到最佳化。玉米干酒糟约含有10%的油,此类油脂富含亚油酸(C18:2)——一种多不饱和脂肪酸,主要产生(不受欢迎的)软猪油。

关键词： DDGS 多不饱和脂肪酸玉米干酒糟肉质日粮饲料成分 DDGs 田间试验

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煤层天然气的开采

国外测井技术 2005年第2期20卷 43-60页

作者： John Anderson Leif Colson Mike simpson Tom Olsen Paul Basinski Zachariah John Andrew Beaton Riaz Khan Charles Boyer Daren Bulat Satyaki Ray Don Reinheimer greg Schlachter Nexen 加拿大有限公司加拿大艾伯塔省卡尔加里 El Paso 开采公司美国得克萨斯州休斯敦艾伯塔省地质调查局艾伯塔省埃德蒙顿

煤层中的天然气是一种很重要的资源，可以帮助缓解全球不断增长的能源需求。在许多地区，市场条件以及相应技术的进展已经使得开采这一资源成为一种可行的方法。煤层储藏具有独特的特点，在建井、地层评价、完井和压裂液、模拟以及储藏... 详细信息

煤层中的天然气是一种很重要的资源，可以帮助缓解全球不断增长的能源需求。在许多地区，市场条件以及相应技术的进展已经使得开采这一资源成为一种可行的方法。煤层储藏具有独特的特点，在建井、地层评价、完井和压裂液、模拟以及储藏开发等方面都需要采用新的方法。

关键词：天然气煤层开采能源需求市场条件地层评价压裂液资源储藏完井