Mineralogy and the release of trace elements from slag from the Hegeler Zinc smelter, Illinois (USA)
Nadine M. Piatak, Robert R. Seal II
2010, Applied Geochemistry (25) 302-320
Slag from the former Hegeler Zn-smelting facility in Illinois (USA) is mainly composed of spinifex Ca-rich plagioclase, fine-grained dendritic or coarse-grained subhedral to anhedral clinopyroxenes, euhedral to subhedral spinels, spherical blebs of Fe sulfides, silicate glass, and less commonly fayalitic olivine. Mullite and quartz were also identified in one sample...
Controls of suspended sediment concentration, nutrient content, and transport in a subtropical wetland
G.B. Noe, J. W. Harvey, R.W. Schaffranek, L. G. Larsen
2010, Wetlands (30) 39-54
Redistribution of largely organic sediment from low elevation sloughs to higher elevation ridges is a leading hypothesis for the formation and maintenance of the native ridge and slough landscape pattern found in peat wetlands of the Florida Everglades. We tested this redistribution hypothesis by measuring the concentration and characteristics of...
Multi-species occurrence models to evaluate the effects of conservation and management actions
E.F. Zipkin, Royle J. Andrew, D.K. Dawson, S. Bates
2010, Biological Conservation (143) 479-484
Conservation and management actions often have direct and indirect effects on a wide range of species. As such, it is important to evaluate the impacts that such actions may have on both target and non-target species within a region. Understanding how species richness and composition differ as a result of...
Do larval fishes exhibit diel drift patterns in a large, turbid river?
K.S. Reeves, D.L. Galat
2010, Journal of Applied Ichthyology (26) 571-577
Previous research suggested larval fishes do not exhibit a diel drift cycle in turbid rivers (transparency <30 cm). We evaluated this hypothesis in the turbid, lower Missouri River, Missouri. We also reviewed diel patterns of larval drift over a range of transparencies in rivers worldwide. Larval fishes were collected from...
Food habits of stunted and non-stunted white perch (Morone americana)
N.J.C. Gosch, J.R. Stittie, K.L. Pope
2010, Journal of Freshwater Ecology (25) 31-39
We studied food habits of white perch (Morone americana) from two populations with different stable states (stunted [Branched Oak Lake, Nebraska] and non-stunted [Pawnee Lake, Nebraska]) to determine if change in food habits of white perch is likely to occur in situations where a stunted white perch population is altered...
Piscicides and invertebrates: after 70 years, does anyone really know?
M.R. Vinson, E.C. Dinger, D.K. Vinson
2010, Fisheries (35) 61-71
The piscicides rotenone and antimycin have been used for more than 70 years to manage fish populations by eliminating undesirable fish species. The effects of piscicides on aquatic invertebrate assemblages are considered negligible by some and significant by others. This difference of opinion has created contentious situations and delayed native...
Do competitors modulate rare plant response to precipitation change?
J.M. Levine, Mceachern A. Kathryn, C. Cowan
2010, Ecology (91) 130-140
Ecologists increasingly suspect that climate change will directly impact species physiology, demography, and phenology, but also indirectly affect these measures via changes to the surrounding community. Unfortunately, few studies examine both the direct and indirect pathways of impact. Doing so is important because altered competitive pressures can reduce or magnify...
Federal land management, carbon sequestration, and climate change in the Southeastern U.S.: a case study with fort benning
S. Zhao, S. Liu, Z. Li, Terry L. Sohl
2010, Environmental Science & Technology (44) 992-997
Land use activities can have a major impact on the temporal trendsandspatialpatternsofregionalland-atmosphereexchange of carbon. Federal lands generally have substantially different land management strategies from surrounding areas, and the carbon consequences have rarely been quantified and assessed. Using the Fort Benning Installation as a case study, we used the General Ensemble...
New and interesting species of the genus Muelleria (Bacillariophyta) from the Antarctic region and South Africa
B. Van De Vijver, G. Mataloni, L. Stanish, S. A. Spaulding
2010, Phycologia (49) 22-41
During a survey of the terrestrial diatom flora of some sub-Antarctic islands in the southern Indian and Atlantic Oceans and of the Antarctic continent, more than 15 taxa belonging to the genus Muelleria were observed. Nine of these taxa are described as new species using light and scanning electron microscopy....
Geochemistry of trace elements in coals from the Zhuji Mine, Huainan Coalfield, Anhui, China
R. Sun, Gaisheng Liu, Lingyun Zheng, C. L. Chou
2010, International Journal of Coal Geology (81) 81-96
The abundances of nine major elements and thirty-eight trace elements in 520 samples of low sulfur coals from the Zhuji Mine, Huainan Coalfield, Anhui, China, were determined. Samples were mainly collected from 10 minable coal seams of 29 boreholes during exploration. The B content in coals shows that the influence...
A review of silver-rich mineral deposits and their metallogeny
Frederick Graybeal, Peter G. Vikre
2010, Book chapter, The challenge of finding new mineral resources: Global metallogeny, innovative exploration, and new discoveries; SEG Special Publication 15 Vol. 1
Mineral deposits with large inventories or high grades of silver are found in four genetic groups: (1) volcanogenic massive sulfide (VMS), (2) sedimentary exhalative (SEDEX), (3) lithogene, and, (4) magmatichydrothermal. Principal differences between the four groups relate to source rocks and regions, metal associations, process and timing of mineralization, and...
An automated approach for reconstructing recent forest disturbance history using dense Landsat time series stacks
Chengquan Huang, Samuel N. Goward, Jeffery G. Masek, Nancy Thomas, Zhiliang Zhu, James Vogelmann
2010, Remote Sensing of Environment (114) 183-198
A highly automated algorithm called vegetation change tracker (VCT) has been developed for reconstructing recent forest disturbance history using Landsat time series stacks (LTSS). This algorithm is based on the spectral–temporal properties of land cover and forest change processes, and requires little or no fine tuning for most forests with...
Effects of vegetation restoration and slope positions on soil aggregation and soil carbon accumulation on heavily eroded tropical land of Southern China
Xinyi Tang, Shuguang Liu, Juxiu Liu, Guoyi Zhou
2010, Journal of Soils and Sediments (10) 505-513
Background aim and scopeSoil organic carbon (SOC) accumulation is strongly affected by soil erosion and deposition that differ at slope positions of a watershed. However, studies on the effects of topography on soil aggregation and SOC dynamics, especially after the implementation of vegetation restoration, are rare....
Influence of diet of double-crested cormorants on thiamine, lead, and mineral contents of their eggs
H. George Ketola, James H. Johnson, C.M. Adams, J.F. Farquhar
2009, Journal of Freshwater Ecology (24) 39-43
Throughout much of the Great Lakes basin, reproduction of several fish species is impaired by deficiency of thiamine in their eggs, an effect attributed to consumption of thiaminase-containing forage species, primarily alewife (Alosa pseudoharengus.) Because the double-crested cormorant (Phalacrocorax auritus) nesting on islands in Lake Ontario is known to consume...
The Restoration Rapid Assessment Tool: An Access/Visual Basic application
Ron Hiebert, D.L. Larson, K. Thomas, N. Tancreto, D. Haines, A. Richey, T. Dow, L. Drees
2009, Report
Managers of parks and natural areas are increasingly faced with difficult decisions concerning restoration of disturbed lands. Financial and workforce resources often limit these restoration efforts, and rarely can a manager afford to address all concerns within the region of interest. With limited resources, managers and scientists have to decide...
Occupancy estimation and the closure assumption
Christopher T. Rota, Robert J. Fletcher Jr., Robert M. Dorazio, Matthew G. Betts
2009, Journal of Applied Ecology (46) 1173-1181
1. Recent advances in occupancy estimation that adjust for imperfect detection have provided substantial improvements over traditional approaches and are receiving considerable use in applied ecology. To estimate and adjust for detectability, occupancy modelling requires multiple surveys at a site and requires the assumption of 'closure' between surveys, i.e....
Mangrove forest recovery in the Everglades following Hurricane Wilma
Daniel Sarmiento, Jordan Barr, Vic Engel, Jose D. Fuentes, Thomas J. Smith III, Jay C. Zieman
2009, LTER Network News (22)
On October 24th, 2005, Hurricane Wilma made landfall on the south western shore of the Florida peninsula. This major disturbance destroyed approximately 30 percent of the mangrove forests in the area. However, the damage to the ecosystem following the hurricane provided researchers at the Florida Coastal Everglades (FCE) LTER site...
Impacts of forest fragmentation on species richness: A hierarchical approach to community modelling
Elise F. Zipkin, Amielle DeWan, J. Andrew Royle
2009, Journal of Applied Ecology (46) 815-822
1. Species richness is often used as a tool for prioritizing conservation action. One method for predicting richness and other summaries of community structure is to develop species-specific models of occurrence probability based on habitat or landscape characteristics. However, this approach can be challenging for rare or elusive species for...
The lost micro-deserts of the Patuxent River using landscape history, insect and plant specimens, and field work to detect and define a unique community
Sam Droege, C.A. Davis, W.E. Steiner Jr., J. Mawdsley
2009, Proceedings of the Entomological Society of Washington (111) 132-144
Historical and recent records of both plants and insects are synthesized for uplands along the eastern edge of Maryland?s Patuxent River from the edge of the Piedmont south to Jug Bay. This strip is characterized by deep sandy soils found in the Evesboro and Galestown sandy loams soil series....
Perturbation analysis for patch occupancy dynamics
Julien Martin, James D. Nichols, Carol L. McIntyre, Goncalo Ferraz, James E. Hines
2009, Ecology (90) 10-16
Perturbation analysis is a powerful tool to study population and community dynamics. This article describes expressions for sensitivity metrics reflecting changes in equilibrium occupancy resulting from small changes in the vital rates of patch occupancy dynamics (i.e., probabilities of local patch colonization and extinction). We illustrate our approach with a...
Life history and status of shortnose sturgeon (Acipenser brevirostrum) in the Potomac River
Micah Kieffer
2009, Journal of Applied Ichthyology (25) 34-38
We collected the first life history information on shortnose sturgeon (Acipenser brevirostrum) in any of the rivers to Chesapeake Bay, the geographic center of the species range. In the Potomac River, two telemetry-tagged adult females used 124 km of river: a saltwater/freshwater reach at river km (rkm) 63-141 was the...
Deglaciation in the southeastern Laurentide Sector and the Hudson Valley – 15,000 Years of vegetational and climate history
Dorothy M. Peteet, John Rayburn, Kirsten M. Menking, Guy Robinson, Byron D. Stone
2009, Conference Paper, Field trip guidebook: New York State Geological Association 81st annual meeting, September 25-27, 2009
In this field trip, we provide a review of the significant controversy concerning the timing of deglaciation in the Hudson and Wallkill Valleys. We outline the differences in methodology and chronology with a circular route throughout the Hudson and Wallkill valleys. We begin the trip at Lake Mohonk near New...
The struggle to save the Laysan duck: Managing diseases that threaten a rare bird in the Hawaiian islands
Thierry M. Work
2009, The Wildlife Professional (3) 59-64
No abstract available....
Groundwater-quality data in the Antelope Valley study unit, 2008: Results from the California GAMA Program
Stephen J. Schmitt, Barbara J. Milby Dawson, Kenneth Belitz
2009, Data Series 479
Groundwater quality in the approximately 1,600 square-mile Antelope Valley study unit (ANT) was investigated from January to April 2008 as part of the Priority Basin Project of the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The GAMA Priority Basin Project was developed in response to the Groundwater Quality Monitoring Act...
Landsat mapping of local landscape change: The satellite-era context
Rachel Headley, Robert Gilmore Pontius, John Harrington, Cynthia Sorrensen
Brent Yarnal, Colin Polsky, James J. O’Brien, editor(s)
2009, Book chapter, Sustainable communities on a sustainable planet: The human-environment regional observatory project
To set the stage for a vulnerability analysis, investigators must describe and understand the geographic context, including physical characteristics of the landscape and the political and socioeconomic milieu of the population (Jianchu et al. 2005). Vulnerability studies focus on a particular place, at a specific time through its three dimensions,...
