bluuebunny/crossref_metadata_2025 huggingface dataset:
Examining the Theory and Clinical Utility of Writing About Emotional Experiences
Authors: Bootzin Richard R.
Published: April 2006

Pennebaker s (this issue) intervention for writing about emotional experiences shows promise as a module for inclusion in therapeutic packages There are conceptual, methodological and practical issues to be considered, however These issues are discussed, and parallels are drawn from the literatures on the mood-regulatory function of dreams and on the effects of social support on health Although there is evidence that writing about emotional experiences has beneficial effects on health, it is premature to recommend writing intervention as a treatment component for specific problems What is needed at this point is systematic research to evaluate its clinical utility
The Trouble with Language: Experiential Avoidance, Rules, and the Nature of Verbal Events
Authors: Hayes Steven C , Gifford Elizabeth V.
Published: April 2006

Experiential avoidance is the attempt to escape or avoid certain private experiences, such as particular feelings, memories, behavioral predispositions, or thoughts In this article, we discuss evidence that experiential avoidance is both pervasive and often harmful to human functioning We argue that experiential avoidance can be explained by two verbal processes, and we provide basic behavioral evidence on both the bidirectionality of derived stimulus relations in verbal humans and the insensitivity to the effects of responding produced by verbal rules If this analysis is correct, experiential avoidance is built into human language and thus can be undermined only with difficulty
Listening to Nicotine: Negative Affect and the Smoking Withdrawal Conundrum
Authors: Piasecki Thomas M. , Kenford Susan L. , Smith Stevens S. , Fiore Michael C , Baker Timothy B.
Published: April 2006

In recent years, theoretical models of drug motivation and drug dependence have downplayed the role of withdrawal symptoms in the maintenance of addiction During this same period, strong links between drug use and measures of negative affect have been uncovered in empirical research In this article we examine these trends in the context of research on smoking Evidence is presented from two recent studies on smoking relapse that highlight the intimate connection between withdrawal symptomatology and negative affect Specifically, these studies reveal that (a) single-occasion measures of withdrawal symptoms or other markers of physical dependence do not contribute incremental validity in predicting relapse relative to measures of negative affect, (b) the trajectory of withdrawal symptoms is highly idiosyncratic, (c) exacerbations cannot be tightly coupled with pharmacological events, (d) the temporal dynamics of withdrawal reflect fluctuations in negative affect, and (e) differences in the trajectory of withdrawal symptoms index relapse vulnerability We conclude that a broadened view of withdrawal recognizing its probable affective bases will enhance its explanatory power and suggest new treatment strategies
Marital Satisfaction and Depression: Different Causal Relationships for Men and Women?
Authors: Fincham Frank D , Beach Steven R.H , Harold Gordon T , Osborne Lori N.
Published: April 2006

A sample of 150 recently married couples provided data egarding marital satisfaction and depressive symptoms Approximatey 18 months later, 116 of these couples provided complete information on marital satisfaction and depression once again The data were examined using three sets of causal models, which yielded converging results For men, causal paths emerged from depression to marital satisfaction, whereas for women causal paths were from satisfaction to depression The results are discussed in relation to the marital discord model of depression
On Reporting Recollective Experiences and “Direct Access to Memory Systems”
Authors: Gardiner John M. , Richardson-Klavehn Alan , Ramponi Cristina
Published: April 2006

Strack and F$oUrster (1995) showed that, unlike remember responses, know responses in recognition memory were influenced by manipulating response bias. We describe an experiment that replicated theirs but additionally allowed subjects to report guesses. Only guess responses were influenced by this manipulation. Response bias had no effects on either know or remember responses. This outcome suggests that manipulating response bias influences know responses only when guessing is encouraged but not reported as such. Moreover, though know responses reflected memory for the study events, guess responses did not.
Eyeblink Classical Conditioning and Awareness Revisited
Authors: Papka Michelle , Ivry Richard B. , Woodruff-Pak Diana S
Published: April 2006

Dual-task performance was assessed in 140 adults during eyeblink classical conditioning (EBCC) and one of several secondary tasks (timed-interval tapping, recognition memory choice reaction time, video viewing) Four groups received paired-EBCC stimulus presentation and three groups received explicitly unpaired EBCC stimuli Although the subjects were not told about the conditioning task, they acquired conditioned responses (CRs) at normal levels Postsession interviews probed participants' awareness of EBCC stimulus contingencies and production of CRs Reported awareness of paired-EBCC stimulus contingencies and CR production was not related to actual EBCC performance Twenty-seven percent of the participants receiving explicitly unpaired stimuli reported a stimulus contingency when none existed The dissociation between awareness and performance provides additional support for the categorization of simple EBCC as a form of nondeclarative learning
Spreading of Visual Attention to Modally Versus Amodally Completed Regions
Authors: Davis Greg , Driver Jon
Published: April 2006

Regions of objects that are partially obscured in the current retinal image are often perceptually filled in by the visual system (Kantzsa, 1979) In some cases (modal completion), this causes the filled-in region to appear tinged with the color and brightness of unobscured parts of that object, but in other cases (amodal completion), it does not (Michotte & Burke, 1951) It has recently been argued that modal and amodal completion both arise in preattentive vision, and may operate equivalently at that level (Davis & Driver, 1994, He & Nakayama, 1992, Shipley & Kellman, 1992) In this article, we show that they have different effects on attentive vision, with attention tending to spread to (and from) modally completed regions and their visible inducers, but not to (or from) comparable amodally completed regions and their inducers This finding is consistent with visual attention operating on surfaces (eg, He & Nakayama, 1995) in a viewer-centered representation of the scene, after the operation of filling-in processes.
To What Extent Do Unique Parts Influence Recognition Across Changes in Viewpoint?
Authors: Tarr Michael J. , Bülthoff Heinrich H. , Zabinski Marion , Blanz Volker
Published: April 2006

We investigated how varying the number of unique parts within an object influences recognition across changes in viewpoint The stimuli were shaded objects composed of five three-dimensional volumes linked end to end with varying connection angles Of the five volumes, zero, one, three, or five were qualitatively distinct (e g, brick vs cone), the rest being tubes Sequential-matching and naming tasks were used to assess the recognition of these stimuli over rotations in depth Three major results stand out First, regardless of the number of distinct parts, there was increasingly poorer recognition performance with increasing change in viewpoint Second, the impact of viewpoint change for objects with one unique part was less than that for the other objects Third, additional parts beyond a single unique part produced strong viewpoint dependency comparable to that obtained for objects with no distinct parts Thus, visual recognition may be explained by a view-based theory in which viewpoint-specific representations encode both quantitative and qualitative features.
There Are Two Word-Length Effects in Verbal Short-Term Memory: Opposed Effects of Duration and Complexity
Authors: Cowan Nelson , Wood Noelle L. , Nugent Lara D. , Treisman Michel
Published: April 2006

In the word-length effect (WLE), lists of shorter words are better recalled than lists of longer words This effect is fundamental to decay-based theories of verbal short-term memory, such as the phonological loop theory (Baddeley, 1986) The WLE has been attributed to the time taken to articulate words, not their structure, a critical point in the debate between decay and interference theories However, word duration and complexity have previously been confounded In this article, we show that the traditional WLE comprises two opposed effects an advantage for words spoken more quickly (short words in terms of duration) and an advantage for words with more elements (long words in terms of complexity) We also report two interactions a disadvantage for a midlist change in duration and an advantage for a midlist change in complexity These results contradict simple decay-based theories and establish the importance of interference in short-term memory We discuss whether decay is also required
Grammatical Gender Is on the Tip of Italian Tongues
Authors: Vigliocco Gabriella , Antonini Tiziana , Garrett Merrill F.
Published: April 2006

To correctly produce words, speakers must have access to three broad classes of information lexical semantics, syntax, and sound structure The relevant information must be organized in ways that permit rapid and accurate retrieval of specific lexical targets Current models of language production do this by a two-stage process The first stage incorporates lexical meanings and syntax, and the second, sound structure We used studies of the tip-of-the-tongue phenomenon (i e, the condition in which a speaker cannot produce a well-known word) to evaluate this organization and in so doing, we provide the first clear experimental evidence for a lexical stage that includes syntax and is distinct from both sound structure and the conceptual correlates of syntactic features.
Should Significance Tests be Banned? Introduction to a Special Section Exploring the Pros and Cons
Authors: Shrout Patrick E.
Published: April 2006

Significance testing of null hypotheses is the standard epistemological method for advancing scientific knowledge in psychology, even though it has drawbacks and it leads to common inferential mistakes These mistakes include accepting the null hypothesis when it fails to be rejected, automatically interpreting rejected null hypotheses as theoretically meaningful, and failing to consider the likelihood of Type II errors Although these mistakes have been discussed repeatedly for decades, there is no evidence that the academic discussion has had an impact A group of methodologists is proposing a new approach simply ban significance tests in psychology journals The impact of a similar ban in public-health and epidemiology journals is reported
Significance Testing in Psychological Research: Some Persisting Issues
Authors: Estes W. K.
Published: April 2006

Empirical surveys show that reports of significance tests appear in the vast majority of articles in psychological research journals and are relied on by both investigators and journal reviewers when making decisions about replication of experiments and submission and acceptance of research reports Evaluation of claims by critics that significance testing is, nonetheless, counterproductive yields suggestions for improvements of prevailing practices, but also the recommendation that decisions about significance testing versus alternative procedures should remain the province of the individual investigator, unconstrained by mandates or prohibitions by publishers or officials of scientific associations The prime focus for efforts toward improvement of research design and data analysis in psychology and other behavioral sciences should be upgrading the mathematical and general scientific preparation of students preparing for research careers in these fields
Psychology, Idea Technology, and Ideology
Authors: Schwartz Barry
Published: April 2006

Scientific development leads to a technology of ideas–idea technology–no less than it leads to a technology of objects But idea technology can have insidious effects that the technology of objects does not First, ideas can suffuse through a culture before people notice they are there And second, ideas can have profound effects even when they are false–when they are nothing more than ideology These effects can arise because sometimes when people act on the basis of ideology, they inadvertently arrange the very conditions that bring reality into correspondence with the ideology This potential effect of ideology is discussed in connection with the behavioral psychology of Skinner and the claim by Herrnstein and Murray that intelligence is, for all practical purposes, unmodifiable I suggest that, in general, psychologists must be on the lookout for positive feedback loops between theory and practice that contribute to theory confirmation and thus mislead psychologists into interpreting historically and culturally contingent truths as universal ones
Effects of Visual Perspective and Narcissism on Self-Perception: Is Seeing Believing?
Authors: Robins Richard W. , John Oliver P.
Published: April 2006

Would people still see themselves through rose-colored glasses if they had the same perspective as others do? We contrast predictions from narcissism theory with cognitive-informational accounts of self-perception bias Study I showed that narcissists enjoy situations in which they can view themselves from an external perspective, and report that such situations boost their self-confidence In Study 2, subjects evaluated their performance in a group task from the normal visual perspective of the self and from a “reversed” perspective (manipulated via videotape) Narcissists overestimated their performance, and reversing visual perspective did not reduce this self-enhancement bias Instead, we found a person-situation interaction Narcissists became even more positively biased in the reversed-perspective condition, whereas nonnarcissists showed even less bias Thus, allowing narcissistic individuals to observe themselves on videotape further increased their self-admiration, just as the mythical Narcissus admired his reflection in the pond
Transsaccadic Memory and Integration During Real-World Object Perception
Authors: Henderson John M.
Published: April 2006

What is the nature of the information that is preserved and combined across saccadic eye movements during the visual analysis of real-world objects? The two experiments reported investigated transsaccadic memory and transsaccadic integration, respectively In the critical condition, participants were presented with one set of contours from an object during one fixation and with a complementary set of contours during the next fixation In Experiment 1, participants could at best inconsistently detect contour changes across the saccade In Experiment 2, a change in visible contour had no influence on object identification These results suggest that a veridical representation of object contour is neither consistently preserved nor integrated across a saccade
Clusters Precede Shapes in Perceptual Organization
Authors: Trick Lana M. , Enns James T.
Published: April 2006

Does perceptual grouping require attention? Recent controversy on this question may be caused by a conflation of two aspects of grouping: element clustering (determining which elements belong together) and shape formation (determining cluster boundaries). In Experiment I, observers enumerated diamonds that were drawn with either lines or dots. These two types of stimuli were subitized (enumerated rapidly and accurately in the range from one to three items) equally well, suggesting that clustering dots into countable entities did not demand attention. In contrast, when target diamonds were enumerated among distractor squares in Experiment 2, only line-drawn items could be subitized. We propose that clustering and shape formation not only involve different perceptual processes, but play different functional roles in vision.
Object Grating Method Application in Strain Determination on CTOD Tests
Authors: Gubeljak N. , Semenski D. , Drvar N. , Predan J. , Kozak D. , Oblak M.
Published: April 2006

Abstract:  Standard fracture toughness tests require standard specimens with the presumption that mechanical properties are uniform in the crack growth direction. Standards for crack tip opening displacement (CTOD) fracture tests prescribe remote crack mouth opening displacement, which can lead to inadequate results in the case of heterogeneous materials properties. This paper describes the application of an object grating method (OGM) on the fracture behaviour of a heterogeneous specimen. Fracture behaviour is described by measuring deformation on the surface of a specimen, in terms of CTOD and, consequently, by strain determination. An OGM is advantageously used when measuring modified CTOD tests on two specimens with an initial crack in a macroscopic heterogeneous welded joint. Results significantly show that fracture behaviour depends on the material in the vicinity of the crack tip concerning the direction of crack propagation.
Investigation of Analytical Solutions for Bonded Structures by Photomechanical Methods
Authors: Wang W.‐C. , Hsu J.‐S.
Published: April 2006

Abstract:  In this paper, both photoelasticity and moiré interferometry were successively incorporated with finite element method to investigate the predicted thermal stresses and lateral displacement of bonded structures calculated from different theories. It was found that the distributions of moment and transverse force play significant roles in making different values of thermal stresses in the adherends by authors’ and Suhir's 1986 theories. On the other hand, the values of lateral displacement obtained from different theories are almost identical.
The cumulation problem
Authors: Sjöblom Gunnar , ANCKAR DAG , SJÖBLOM GUNNAR
Published: April 2006

Abstract After a discussion of possible components in a definition of ‘cumulation’ and the relative lack of cumulation in political science, a scheme for research strategies is outlined with the aim of facilitating cumulation, or at least facilitating a diagnosis of the state of political science in this respect. The scheme includes three types of studies: (1) analysis of the formal properties of theoretical approaches in political science, (2) content analyses in the form of inventories of problems, propositions and concepts in the discipline, (3) evaluational analysis, i.e. an assessment of what ‘theory criteria’ to use for evaluating the approaches and of the probable relations between these criteria.
Party as linkage
Authors: Katz Richard S. , MÜLLER WOLFGANG C.
Published: April 2006

AbstractUntil recent years, two major trends in European politics‐the growth of State services and increased political participation‐have complemented the central role of parties. This paper argues that this complementarity may have started to come unstuck, and questions the future viability of the mass party as a result of a shift in the balance of perceived advantages of the mass party by both leaders and members. The paper discusses several potential costs and benefits of party membership for leaders and members. Using membership statistics and survey data the reasonableness of these arguments is explored.
Tidal Marsh Restoration: Trends in Vegetation Change Using a Geographical Information System (GIS)
Authors: Barrett Nels E. , Niering William A.
Published: April 2006

Adequately evaluating the success of coastal tidal marsh restoration has lagged behind the actual practice of restoring tidally restricted salt marshes. A Spartina‐dominated valley marsh at Barn Island Wildlife Management Area, Stonington, Connecticut, was tidally restricted in 1946 and consequently converted mostly to Typha angustifolia. With the re‐introduction of tidal flooding in 1978, much of the marsh has reverted to Spartina alterniflora. Using a geographical information system (GIS), this study measures restoration success by the extent of geographical similarity between the vegetation of the restored marsh and the pre‐impounded marsh. Based on geographical comparisons among different hydrologic states, pre‐impounded (1946), impounded (1976), and restored (1988) tidal marsh restoration is a convergent process. Although salt marsh species currently dominate the restored system, the magnitude of actual agreement between the pre‐impounded vegetation and that of the restored marsh is only moderate. Further restoration of the salt marsh vegetation may be limited by continued tidal restriction, marsh surface subsidence, and reduced accretion rates. General trends of recovery are identified using a gradient approach and the geographic pattern’ of vegetation change. In the strictest sense, if restoration refers only to vegetation types that geographically replicate preexisting types, then only 28% of the marsh has been restored. Restoration in a broader sense, however, representing the original salt marsh vegetation regardless of spatial position, amounts to 63% restored. Unrestored marsh, dominated by Typha angustifolia and Phragmites australis, remains at 37%. By emphasizing trends during vegetation recovery, this evaluation technique aims to understand the restoration process, direct future research goals, and ultimately aid in future restoration projects.
The Impact of Storage of Soils during Opencast Mining on the Microbial Community: A Strategist Theory Interpretation
Authors: Harris J. A. , Birch P. , Short K. C.
Published: April 2006

The microbial community in a soil stripped and stored during opencast coal mining was analyzed. There were significant effects of soil disturbance on the microbial community: in particular, there were large decreases in the total microbial biomass, as determined by ATP analysis, and numbers of fungal propagules as a result of the store construction process, but there was no significant effect on the numbers of bacteria. During the subsequent months of storage there was a flush in the numbers of bacteria, with gram‐negative bacteria showing an increase of nearly 700% in comparison to the control. During this time there was a steady accumulation in the amount of ammonium in the deepest part of the soil store, indicating the onset of anaerobiosis. These changes may be interpreted in terms of lifestyle strategy theory (Grime 1979). The bacteria exhibit behavior typical of R‐strategists, or ruderal species, taking advantage of the nutrients made available by the death of fungal biomass during store construction. Fungi respond as C‐strategists, or competitors, and they are severely affected by store construction‐and unable to persist deep in the anaerobic part of the store. In contrast, anaerobes, S‐strategists or stresstolerators, are able to survive under the same conditions. These changes have serious implications for the restoration of systems using stored topsoil as a resource. The microbial population has been altered in terms of its size and composition. Many of the fungi required for adequate breakdown and incorporation of organic matter will be absent, and the soils will be generally poor in microbial biomass. This will lead to inadequate nutrient cycling and poor soil structural stability, two factors essential for the restoration of a self‐sustaining ecosystem.
Use of Terrestrial Arthropods to Evaluate Restored Riparian Woodlands
Authors: Williams Kathy S.
Published: April 2006

The goal of this study was to use terrestrial arthropods to help evaluate the progress of a riparian restoration effort along the San Luis Rey River in California by comparing characteristics of the arthropod community at the reconstructed system to those of a naturally occurring riparian woodland used as a reference site. Insects and other arthropods were sampled throughout 1989–1991 using pan trapping and sweep sampling of dominant plants. Assemblages of taxa were monitored as indicators of functional groups that influence ecosystem processes: pollinators, herbivores, predators, parasites, and detritivores. Relative abundances of indicator assemblages were compared between sites to evaluate the establishment and maintenance of processes critical for the natural function of the reconstructed riparian ecosystem. A major objective of this project was to create habitat for the Least Bell's Vireo, so a group of potential prey items was designated to indicate vireo food resources. Over 230,000 arthropods were identified to order or family and by size. Insect communities developed rapidly at the restored habitat. Although the abundance of all arthropods was lower at the reconstructed site than at the reference site, the same orders were present after three years in similar proportions at both locations, and mean abundances were within an order of magnitude of each other. Abundance of certain groups, such as detritivores, suggested that arthropods had propagated rapidly at the restoration site, a possible indication of resiliency. Relatively low numbers of other arthropods, such as predators and parasites, at the reconstructed site indicated the need for continued monitoring. The decline of pollinators and herbivores by 1991 at the reconstructed site suggested that they may have immigrated or been introduced with transplanted vegetation in 1989, but have had difficulty colonizing the site. Although the Least Bell's Vireos were seen foraging at the restored site after three years, no nests were found. Nesting is anticipated, however, as the site matures.
Lag in Stream Channel Adjustment to Livestock Exclosure, White Mountains, California
Authors: Kondolf G. Mathias
Published: April 2006

Livestock have been excluded from riparian zones along many streams in western North America in an effort to restore aquatic and riparian habitat degraded by livestock grazing. Within these exclosures, channel adjustment to elimination of grazing pressure may lag behind plant recovery because of the time required to deposit sediment along the vegetated banks of the stream channel. Moreover, unless grazing is eliminated from the watershed, the channel within the exclosure must still accommodate increased runoff and sediment loads from upstream. This hydrologic regime may prevent a return to predisturbance channel morphology. Cross sections of the North Fork Cottonwood Creek in the White Mountains of California showed no significant difference in channel width within and downstream of a 24‐year‐old exclosure, despite a lush growth of stream bank vegetation that gives the impression of a narrower channel within the exclosure.
Reproducing Bobcats to Cumberland Island, Georgia
Authors: Diefenbach Duane R. , Baker Leslie A. , James William E. , Warren Robert J. , Conroy Michael J.
Published: April 2006

Many felids are threatened by loss of habitat, lack of genetic diversity, and over‐exploitation. The reintroduction of bobcats (Felis rufus) to Cumberland Island, Georgia provided an opportunity to reintroduce a mid‐sized felid without the concern for species survival that is paramount with endangered species. We captured bobcats from the coastal plain region of Georgia, briefly held them in captivity, and released them on Cumberland Island. We describe and evaluate the protocols and techniques used to accomplish the reintroduction. Future reintroductions of felids should consider the problem of post‐release dispersal, although our island was relatively isolated and inhibited dispersal. Also, any reintroduction effort should invest effort and resources into post‐release monitoring of the population. Empirical knowledge about the effects of spatial distribution, genetics, population dynamics, especially mechanisms of population regulation, behavior, and environmental conditions on the viability of populations is critical to the conservation of endangered species. Future research of the bobcats on Cumberland Island will be able to address aspects of the population and genetic dynamics of a small, insular felid population.
Biology and Management of Sagittaria latifolia Willd (Broad‐leaf Arrow‐head) for Wetland Restoration and Creation
Authors: Marburger Joy E.
Published: April 2006

Sagittaria latifolia Willd. is commonly used for wetland enhancement, restoration, and creation. It is a C3 species that is widely distributed in southeastern Canada and the eastern half of the United States. It provides habitat and food benefits to waterfowl and improves water quality in wetlands. Monoecious and dioecious varieties occur in the U.S. that exhibit different life history characteristics. Clonal spread occurs through growth of rhizomes and tubers. S. latifolia grows in a wide range of fresh water and soil conditions. It persists in stabilized water levels at depths of less than 50 cm and few drawdowns. The species tolerates and assimilates high levels of nutrients and heavy metals. There is a limited data base on the installation and management of the species. Tubers and plants are preferred plant materials for field establishment. Herbivory by insects, waterfowl, and other animals may greatly reduce planting success. Future studies relevant to improvement of propagule storage, planting conditions, and management of mature plants for wetland projects are suggested.
Status of a Relocated Population of Endangered Iguana pinguis on Guana Island, British Virgin Islands
Authors: Goodyear Numi C. , Lazell James
Published: April 2006

Eight individual rock iguanas (Iguana pinguis) from Anegada Island were relocated to Guana Island by Lazell, 1984–1987, in order to establish a second population reservoir for this endangered species. The species may have originally occupied the entire Puerto Rico Bank. The relocation has been successful and, in the area currently providing the best habitat, we estimate a density of 9 or 12 animals of various age classes per 19 ha. The optimal area contains a sheep exclosure with relatively dense understory vegetation and numerous exotic as well as native species of plants. Iguana activity is concentrated on east facing slopes and ridge‐tops that get morning sun. Outside the exclosure most edible ground cover and shrubs have been eaten by sheep, leaving toxic or noxious species, such as Croton or Lantana, in the understory where I. pinguis adults generally forage. Removal of sheep may be critical to continued population growth of these reptiles. Views on relocation or repatriation of other endangered Antillean Iguana species are advanced, with some ideas on minimum viable population sizes and a possible explanation for the extirpation of I. pinguis from much of its former range.
The Importance of Community Classification to Mitigation and Restoration of Coastal Sage Scrub
Authors: Read Edith A.
Published: April 2006

Community classification has emerged from ecology textbooks into the arena of environmental impact evaluation and mitigation. This development is especially apparent in southern California, where the fate of a community called coastal sage scrub is being decided. Regional plans for development, mitigation, preservation, and restoration are being formulated that will permanently affect the natural landscape. This paper demonstrates the potential for the name of a plant community to affect tradeoffs in planning processes that are intended to offset removal of habitat by development. The discussion focuses on two types of classification systems. One system is hierarchical, with established nomenclatorial rules that allow natural variation to refine the community definitions. Names of plant associations directly reflect the dominant species in the association, as in Artemisia californica—Eriogonum fasciculatum (California sagebrush—California buckwheat). The second system is nonhierarchical, in which observations of natural landscapes are fit into established definitions of community types, such as Diegan coastal sage scrub. Advantages and disadvantages of both types of systems are discussed and illustrated by two examples of problems in classifying coastal sage scrub. The discussion concludes with the point that the name of a community has the potential to significantly affect the extent to which equal tradeoffs between community types are actually achieved in mitigation and restoration efforts.
Rapid Salinity Mapping by Electromagnetic Induction for Determining Riparian Restoration Potential
Authors: Sheets Keith R. , Taylor John P. , Hendrickx Jan M. H.
Published: April 2006

The feasibility of measuring soil salinity with electromagnetic induction (EM) for determining riparian restoration potential was investigated on a 28‐hectare plot at the Bosque del Apache National Wildlife Refuge in central New Mexico. The plot was cleared of exotic Tamarix chinensis (saltcedar), surveyed and gridded into 1370.2 hectare sections. Soil samples and EM measurements were taken at each section. We compared laboratory‐determined ECe values from the soil samples with ECa values calculated from the EM measurements using a model developed by Rhoades et al. (1990). Direct comparison of ECe values determined from the two methods yields a low correlation due to sample‐size differences but the calculated ECa was able to accurately predict whether the measured ECe would lie above or below some threshold value. An assessment of general site suitability for riparian restoration with electromagnetic induction has proven to be a rapid, accurate, and cost‐effective alternative to intensive soil sampling.
The Politics of Restoring versus Restocking Salmon in the Columbia River
Authors: McGinnis Michael V.
Published: April 2006

This essay reviews the recent attempts by the Northwest Power Planning and Conservation Council (NPPC) to conserve and restore wild salmon lost to hydroelectric development along the Columbia River and its tributaries. The restoration of the wild salmon is predicated on cooperation between myriad stakeholders in a planning process that includes the NPPC, 11 state and federal agencies, 13 Indian tribes, 8 utilities, and numerous interest groups. The two goals of the essay are (1) to review the recent amendments to the NPPC's fish and wildlife program, and (2) to describe the political barriers to restoration versus restocking of wild salmon in the Columbia River. The failure of political and administrative entities to deal with the problem of restoring wild salmon may result in drastic requirements being imposed by the imperatives of the Endangered Species Act.
Establishment of Moose Browse on Four Growth Media on a Proposed Mine Site in Southcentral Alaska
Authors: Helm D. J.
Published: April 2006

The objective of this study was to evaluate seven woody plant species on four growth media for their potential contribution to moose habitat and establishment of viable plant communities on a proposed mine site in southcentral Alaska. Populus balsamifera (balsam poplar), Salix alaxensis (feltleaf willow), S. barclayi (Barclay willow), S. bebbiana (Bebb willow), Alnus tenuifolia (thinleaf alder), Betula papyrifera (paper birch), and Picea glauca (white spruce) were selected for their functions in moose habitat, ease of propagation, and presence in the existing native vegetation. Three native soils were selected for biological characteristics such as different potential to form mycorrhizae and to regenerate local plant species, both of which are governed partly by existing vegetation. The fourth growth medium, glacial till or overburden, was expected to have little or no biological activity. A mining disturbance was simulated on three sites by removing existing vegetation from the plots, stripping the native soils, and then spreading these soil materials over the respective study plots. Rooted cuttings of the Salicaceae and nursery seedlings of the other species were planted in each of the four growth media. Height and survival of all plant species were greater on the three soil media than on the glacial till during the second and third years. Percentage of ectomycorrhizal infection on transplants was similar among growth media, although lower ectomycorrhizal infection occurred on volunteers in grassland soils than in the other growth media. Browsable plants were produced within three years on the disturbed native soils but not on the glacial till.
Flood Reduction through Wetland Restoration: The Upper Mississippi River Basin as a Case History
Authors: Hey Donald L. , Philippi Nancy S.
Published: April 2006

Despite this nation's massive effort during the past 90 years to build levees throughout the upper Mississippi Basin, mean annual flood damage in the region has increased 140% during that time. These levees exacerbate the flood damage problem by increasing river stage and velocity. Thus, rather than continuing to rely on structural solutions for flood control, it is time to develop a comprehensive flood management strategy that includes using wetlands to intercept and hold precipitation where it falls and store flood waters where they occur. History testifies to the truth of this premise: it was the rampant drainage of wetlands in the nineteenth century that gave rise to many of today's water resources management problems. The 1993 flood verifies the need for additional wetlands: the amount of excess water that passed St. Louis during the 1993 flood would have covered a little more than 13 million acres —half of the wetland acreage drained since 1780 in the upper Mississippi Basin. By strategically placing at least 13 million acres of wetlands on hydric soils in the basin, we can solve the basin's flooding problems in an ecologically sound manner.
An Ecosystem View of the Restoration of the Kissimmee River
Authors: Dahm Clifford N. , Cummins Kenneth W. , Valett H. Maurice , Coleman Ross L.
Published: April 2006

Restoration of the Kissimmee River and floodplain ultimately will involve restoring 70 km of river channel and riparian zone and 11,000 ha of wetland over a period of two decades. Restoring ecosystem integrity is a crucial goal of the project, and the evaluation program is designed to assess the success of this endeavor. Major components of the riverine and floodplain ecosystem will be evaluated, guided by conceptual models of their structure and function. These studies will be referenced to historic conditions of the past and to present‐day conditions in the channelized system. Enhanced connectivity and interactions between the river and floodplain, the interplay of abiotic and biotic variables, and interactions between trophic levels will restructure the channelized river and the largely drained floodplain that now exist. The key to evaluating the success of this ambitious project will be selecting measurements of the structure and function of the river and floodplain ecosystems that are responsive to this large‐scale manipulation. The timing and duration of floodplain inundation, improved dissolved oxygen conditions, germination and establishment of wetland vegetation, and enhancement and expansion of rheophilic benthic invertebrate populations are critical initial elements of restoration. Further expected outcomes are an increase in the primary productivity of the ecosystem, expansion of the fish community into the reopened channels and onto the reflooded floodplain, and improved visitation and use by waterbirds in the restored regions. We highlight predictions of some of these key linkages and primary structural and functional attributes of the restored river and floodplain that should be measured.
The Effect of Timing of Rehabilitation Procedures on the Establishment of a Jarrah Forest After Bauxite Mining
Authors: Ward S. C. , Koch J. M. , Ainsworth G. L.
Published: April 2006

The restoration of the high botanical diversity of the premining jarrah (Eucalyptus marginata) forest is a major priority of rehabilitation following bauxite mining in southwestern Australia. This study investigated the effects of different ripping, seeding, and scarifying dates on the establishment of plants from propagules stored in the topsoil and from applied seed on areas being rehabilitated after mining. Seed stored in the topsoil, rather than applied seed, was the major contributor to plant diversity. Ripping late (April) or scarifying in June significantly reduced the number of species and numbers of individual plants that established from propagules in the topsoil. Species originating from broadcast seed were most numerous when the seed was broadcast in April or after scarifying in June. Scarifying before seeding, particularly in June, increased the establishment of species from the broadcast seed. To make best use of the applied seed, without jeopardizing the establishment of species from the topsoil, pits should be ripped and sown by April. We list a number of strategies that can help maximize plant numbers and botanical diversity on rehabilitated bauxite mines, which may also be of more general application for restoring the original native vegetation on disturbed sites.
Restoration of Chlamydotis undulata macqueenii (Houbara Bustard) Populations in Saudi Arabia: A Progress Report
Authors: Jaime Michel Saint , Combreau Olivier , Seddon Philip J. , Paillat Patrick , Gaudier Philippe , van Heezik Yolanda
Published: April 2006

During the last two decades Chlamydotis undulata (houbara bustard) has declined drastically throughout its range, due primarily to over‐hunting and severe habitat degradation. The threatened extinction of local populations led the National Commission for Wildlife Conservation and Development of Saudi Arabia to implement ex‐ and in‐situ conservation measures: (1) a captive breeding program initiated in 1986, which achieved production of a self‐sustaining breeding flock as well as a surplus for reintroduction by 1992; (2) establishment of a 13,775‐km2 protected area around the last known breeding population in Saudi Arabia; (3) studies of wild birds, to determine densities, feeding ecology, and habitat requirements; and (4) studies on different release techniques (adult releases, sub‐adult releases, feather‐cut sub‐adult releases, and covey releases), carried out since 1991 within the 2,300‐km2 fenced and protected area of the Mahazat as‐Sayd reserve.
Comparison of Restored and Mature Bottomland Hardwood Forests of Southwestern Kentucky
Authors: Shear Theodore H. , Lent Thomas J. , Fraver Shawn
Published: April 2006

We evaluated 50‐year‐old bottomland forests in southwestern Kentucky restored from agriculture by planting and natural regeneration in terms of their development toward mature forests. We described and compared the structure and composition of the plant communities of three stands of each type (planted, naturally regenerated, and mature). Increment cores were analyzed to reconstruct developmental trends. Future trends were predicted from analyses of the midstory and understory composition. Both planting and natural regeneration adequately replaced the structural attributes of the historical bottomland forest. The existing structural differences are expected to diminish over time. Neither regeneration method replaced the wildlife value of the mature bottomland forests due to insufficient establishment and subsequent ingrowth of heavy mast species (particularly oaks and hickories). There was evidence that the understory species compositions of the restored forest types were similar to that of the mature stand type. All forests, including the mature stands, appeared to be succeeding from hydric to mesic species compositions as a result of human‐altered hydrology and natural floodplain processes. We speculate that the historical bottomland species composition will probably not persist on any of the study sites in the long term.
Establishment of Native Semidesert Grasses into Existing Stands of Eragrostis lehmanniana in Southeastern Arizona
Authors: Biedenbender Sharon H. , Roundy Bruce A.
Published: April 2006

The semidesert grassland in southern Arizona has changed from a native grassland to a scattered Prosopis juliflora var. velutina (mesquite) woodland with an understory of African Eragrostis lehmanniana (Lehmann lovegrass) on many sites. To determine native grass restoration potential, seven species were direct seeded into E. lehmanniana stands that were left alive, burned, sprayed with an herbicide and then either left standing, or mowed. Initial native grass establishment was limited in the live standing treatment but was successful for all other treatments when either June or August sowing was followed by consistent summer precipitation and soil water availability. Four species, Bothriochloa barbinodis (cane beardgrass), Bouteloua curtipendula (sideoats grama), Digitaria californica (Arizona cottontop), and Leptochloa dubia (green spangletop) initially established most successfully, while only Muhlenbergia porteri (bush muhly) had consistently limited or no establishment. E. lehmanniana establishment from the seed bank was increased by canopy removal associated with burning. Densities of native grasses one year after successful initial establishment were much lower than that of E. lehmanniana. A possible revegetation strategy would be to spray emergent E. lehmanniana seedlings and surviving plants with an herbicide during the summer rainy season after spring burning. Native grasses could then be established by sowing in early August of that year or June and August of subsequent years until consistent precipitation produces a native grass stand.
Limestone Neutralization of Dogway Fork, West Virginia, by Means of a Rotary‐Drum System
Authors: Zurbuch Peter E. , Menendez Raymond , Clayton Janet L.
Published: April 2006

Research was conducted to determine the efficiency and effects of chemically treating Dogway Fork, a West Virginia stream acidified by acid precipitation. We report on the water‐powered rotary drum system used to apply calcium carbonate slurry to the stream. Two companion papers cover the biological and chemical effects of this treatment. The rotary drums provided near‐continuous treatment over a 4–year period. Limestone aggregate (1.3–3.8 cm) high in calcium carbonate was ground within the drums into slurry form. The relatively low cost of aggregate and its ease of storage permitted economical treatment. The system compared favorably to other types of slurry dosers. Limestone particles deposited in the stream sediment continued over time to be dissolved. They were significant in the overall dissolution efficiency of the limestone treatment. This sediment calcite also provided supplementary neutralization when high flow requirements exceeded the drum station's dosing capability.
Chemical and Fishery Responses to Mitigative Liming of an Acidic Stream, Dogway Fork, West Virginia
Authors: Menendez Raymond , Clayton Janet L. , Zurbuch Peter E.
Published: April 2006

Limestone neutralization of the acidic water of Dog‐way Fork in West Virginia resulted in significant improvements in both water quality and fish populations. Pretreatment water chemistry showed the stream to be highly acidified by acid precipitation, with pH under 5.0 and high aluminum concentrations. During treatment, the goals for the target area of pH 6.5 and acid‐neutralizing capacity of 50 μmeq/L were met for 75.8% and 67% of the time, respectively. A pH 6.0 or above was maintained over 93% of the time. Monomeric aluminum concentrations were reduced significantly, and calcium to hydrogen ionic ratios were over 10 in the target area. Prior to treatment, no resident fish population was found in Dogway Fork. During five years of treatment, conditions were favorable for fish reproduction and survival. Eight fish species inhabited the stream, six were reproducing there, and a fishable brook trout population was established.