Patterns of Tamarix water use during a record drought
J.B. Nippert, J.J. Butler Jr., Gerard J. Kluitenberg, Donald O. Whittemore, D. Arnold, S.E. Spal, J.K. Ward
2010, Oecologia (162) 283-292
During a record drought (2006) in southwest Kansas, USA, we assessed groundwater dynamics in a shallow, unconfined aquifer, along with plant water sources and physiological responses of the invasive riparian shrub Tamarix ramosissima. In early May, diel water table fluctuations indicated evapotranspirative consumption of groundwater by vegetation. During the summer...
Do common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck
Sarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kevin G. McCracken
2010, Molecular Ecology (19) 647-657
We investigated local genetic associations among female Pacific common eiders (Somateria mollissima v-nigrum) nesting in a stochastic Arctic environment within two groups of barrier islands (Simpson Lagoon and Mikkelsen Bay) in the Beaufort Sea, Alaska. Nonrandom genetic associations were observed among nesting females using regional spatial autocorrelation analyses for distance...
Trends and transformation of nutrients and pesticides in a Coastal Plain aquifer system, United States
J. M. Denver, A. J. Tesoriero, J.R. Barbaro
2010, Journal of Environmental Quality (39) 154-167
Four local-scale sites in areas with similar corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] agriculture were studied to determine the effects of different hydrogeologic settings of the Northern Atlantic Coastal Plain (NACP) on the transport of nutrients and pesticides in groundwater. Settings ranged from predominantly well-drained soils...
Melastomes
J.-Y. Meyer, A.C. Medeiros
2010, Book chapter, Encyclopedia of invasive introduced species
No abstract available....
Spatial variability of steady-state infiltration into a two-layer soil system on burned hillslopes
D.A. Kinner, J. A. Moody
2010, Journal of Hydrology (381) 322-332
Rainfall-runoff simulations were conducted to estimate the characteristics of the steady-state infiltration rate into 1-m2 north- and south-facing hillslope plots burned by a wildfire in October 2003. Soil profiles in the plots consisted of a two-layer system composed of an ash on top of sandy mineral soil. Multiple rainfall rates...
Relations between fish abundances, summer temperatures, and forest harvest in a northern Minnesota stream system from 1997 to 2007
Eric C. Merten, Nathaniel A. Hemstad, S.L. Eggert, L.B. Johnson, Randall K. Kolka, Raymond M. Newman, Bruce C. Vondracek
2010, Ecology of Freshwater Fish (19) 63-73
Short-term effects of forest harvest on fish habitat have been well documented, including sediment inputs, leaf litter reductions, and stream warming. However, few studies have considered changes in local climate when examining postlogging changes in fish communities. To address this need, we examined fish abundances between 1997 and 2007 in...
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...
Rapid polymerase chain reaction diagnosis of white-nose syndrome in bats
Jeffrey M. Lorch, A. Gargas, Carol U. Meteyer, B. M. Berlowski-Zier, D. E. Green, V. Shearn-Bochsler, N. J. Thomas, David S. Blehert
2010, Journal of Veterinary Diagnostic Investigation (22) 224-230
A newly developed polymerase chain reaction (PCR)-based method to rapidly and specifically detect Geomyces destructans on the wings of infected bats from small quantities (1–2 mg) of tissue is described in the current study (methods for culturing and isolating G. destructans from bat skin are also described). The lower limits of detection for PCR...
Summer spatial patterning of chukars in relation to free water in Western Utah
R.T. Larsen, J.A. Bissonette, J.T. Flinders, M.B. Hooten, T.L. Wilson
2010, Landscape Ecology (25) 135-145
Free water is considered important to wildlife in arid regions. In the western United States, thousands of water developments have been built to benefit wildlife in arid landscapes. Agencies and researchers have yet to clearly demonstrate their effectiveness. We combined a spatial analysis of summer chukar (Alectoris chukar) covey locations...
Evaluation of aquifer heterogeneity effects on river flow loss using a transition probability framework
N.B. Engdahl, E. T. Vogler, G.S. Weissmann
2010, Water Resources Research (46)
River-aquifer exchange is considered within a transition probability framework along the Rio Grande in Albuquerque, New Mexico, to provide a stochastic estimate of aquifer heterogeneity and river loss. Six plausible hydrofacies configurations were determined using categorized drill core and wetland survey data processed through the TPROGS geostatistical package. A base...
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...
Implications of stunting on morphology of freshwater fishes
C.J. Chizinski, K.L. Pope, G.R. Wilde, R. E. Strauss
2010, Journal of Fish Biology (76) 564-579
The purpose of this study was to assess morphological differences between stunted and non-stunted white perch Morone americana and green sunfish Lepomis cyanellus. Few female M. americana were captured; thus, morphological differences between adult males and juveniles were assessed for M. americana. Similarly, few immature (juvenile) L. cyanellus were captured...
Nearshore concentration of pink shrimp (Farfantepenaeus duorarum) postlarvae in northern Florida bay in relation to nocturnal flood tide
Maria M. Criales, M. B. Robblee, Joan A. Browder, H. Cardenas, Thomas L. Jackson
2010, Bulletin of Marine Science (86) 53-74
We address the question of whether the low abundance of juvenile pink shrimp Farfantepenaeus duorarum (Burkenroad, 1939) in northern-central Florida Bay results from (i) limiting environmental conditions, (ii) a reduced postlarval transport, or (iii) both. To explore this question, postlarvae were collected during the new moon in both summer and...
Traveling around Cape Horn: Otolith chemistry reveals a mixed stock of Patagonian hoki with separate Atlantic and Pacific spawning grounds
P.C. Schuchert, A.I. Arkhipkin, A.E. Koenig
2010, Fisheries Research (102) 80-86
Trace element fingerprints of edge and core regions in otoliths from 260 specimens of Patagonian hoki, Macruronus magellanicus L??nnberg, 1907, were analyzed by LA-ICPMS to reveal whether this species forms one or more population units (stocks) in the Southern Oceans. Fish were caught on their spawning grounds in Chile and...
A multiscale and multidisciplinary investigation of ecosystem-atmosphere CO2 exchange over the rocky mountains of colorado
Jielun Sun, S.P. Oncley, Sean P. Burns, B.B. Stephens, D.H. Lenschow, T. Campos, Russell K. Monson, D. S. Schimel, W.J. Sacks, Stephan F. J. De Wekker, C.-T. Lai, B. Lamb, D. Ojima, P.Z. Ellsworth, L.S.L. Sternberg, S. Zhong, C. Clements, D.J.P. Moore, D.E. Anderson, A.S. Watt, Jiawen Hu, M. Tschudi, S. Aulenbach, E. Allwine, T. Coons
2010, Bulletin of the American Meteorological Society (91) 209-230
A field study combined with modeling investigation demonstrated that the organization of CO2 transport by mountain terrain strongly affects the regional CO2 budget. Atmospheric dynamics can lead to complicated flows generated by inhomogeneous landscapes, topography or synoptic weather systems. The field campaign conducted of a ground deployment, the Carbon in...
Conceptual hierarchical modeling to describe wetland plant community organization
A.M. Little, G.R. Guntenspergen, T. F. H. Allen
2010, Wetlands (30) 55-65
Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental...
Characterization of Metarhizium species and varieties based on molecular analysis, heat tolerance and cold activity
E.K.K. Fernandes, C.A. Keyser, J.P. Chong, D.E.N. Rangel, M.P. Miller, D.W. Roberts
2010, Journal of Applied Microbiology (108) 115-128
Aims: The genetic relationships and conidial tolerances to high and low temperatures were determined for isolates of several Metarhizium species and varieties. Methods and Results: Molecular-based techniques [AFLP and rDNA (ITS1, ITS2 and 5??8S) gene sequencing] were used to characterize morphologically identified Metarhizium spp. isolates from a wide range of...
Soil carbon flux following pulse precipitation events in the shortgrass steppe
S.M. Munson, T.J. Benton, W.K. Lauenroth, I.C. Burke
2010, Ecological Research (25) 205-211
Pulses of water availability characterize semiarid and arid ecosystems. Most precipitation events in these ecosystems are small (???10 mm), but can stimulate carbon flux. The large proportion of carbon stored belowground and small carbon inputs create the potential for these small precipitation events to have large effects on carbon cycling....
Comparison of XAD with other dissolved lignin isolation techniques and a compilation of analytical improvements for the analysis of lignin in aquatic settings
Robert G. M. Spencer, George R. Aiken, Rachael Y. Dyda, Kenna D. Butler, Brian A. Bergamaschi, Peter J. Hernes
2010, Organic Geochemistry (41) 445-453
This manuscript highlights numerous incremental improvements in dissolved lignin measurements over the nearly three decades since CuO oxidation of lignin phenols was first adapted for environmental samples. Intercomparison of the recovery efficiency of three common lignin phenol concentration and isolation techniques, namely XAD, C18with both CH3OH (C18M) and CH3CN (C18A)...
Alexandria's Eastern Harbor, Egypt: Pollen, microscopic charcoal, and the transition from natural to human-modified basin
J.-D. Stanley, C.E. Bernhardt
2010, Journal of Coastal Research (26) 67-79
Pollen and microscopic charcoal examined in Holocene sediment core samples record major environmental modifications affecting Alexandria's Eastern Harbor through time. We assess whether such changes on Egypt's coastal margin were influenced primarily by natural, or natural plus human, or primarily human factors. We focus on (1) the times when pollen...
Is the Northern African Python (Python sebae) Established in Southern Florida?
R.N. Reed, K.L. Krysko, S. Snow, G.H. Rodda
2010, IRCF Reptiles & Amphibians (17) 52-54
No abstract available....
Trail Pheromone Disruption of Argentine Ant Trail Formation and Foraging
D.M. Suckling, R.W. Peck, L.D. Stringer, K. Snook, P.C. Banko
2010, Journal of Chemical Ecology (36) 122-128
Trail pheromone disruption of invasive ants is a novel tactic that builds on the development of pheromone-based pest management in other insects. Argentine ant trail pheromone, (Z)-9-hexadecenal, was formulated as a micro-encapsulated sprayable particle and applied against Argentine ant populations in 400 m2 field plots in Hawai'i Volcanoes National Park....
Temporal and spatial distributions of sediment mercury at salt pond wetland restoration sites, San Francisco Bay, CA, USA
A. Keith Miles, M.A. Ricca
2010, Science of the Total Environment (408) 1154-1165
Decommissioned agricultural salt ponds within south San Francisco Bay, California, are in the process of being converted to habitat for the benefit of wildlife as well as water management needs and recreation. Little is known of baseline levels of contaminants in these ponds, particularly mercury (Hg), which has a well...
Erosion and vegetation restoration impacts on ecosystem carbon dynamics in South China
X. Tang, Shuguang Liu, G. Zhou
2010, Soil Science Society of America Journal (74) 272-281
To quantify the consequences of erosion and vegetation restoration on ecosystem C dynamics (a key element in understanding the terrestrial C cycle), field measurements were collected since 1959 at two experimental sites set up on highly disturbed barren land in South China. One site had received...
Origin and extent of fresh paleowaters on the Atlantic continental shelf, USA
D. Cohen, M. Person, P. Wang, C.W. Gable, D. Hutchinson, A. Marksamer, Brandon Dugan, H. Kooi, K. Groen, D. Lizarralde, R.L. Evans, Frederick D. Day-Lewis, John W. Lane Jr.
2010, Ground Water (48) 143-158
While the existence of relatively fresh groundwater sequestered within permeable, porous sediments beneath the Atlantic continental shelf of North and South America has been known for some time, these waters have never been assessed as a potential resource. This fresh water was likely emplaced during Pleistocene sea-level low stands when...
