Influence Of Environmental Context Research Articles

Warming-induced shifts in alpine soil microbiome: An ecosystem-scale study with environmental context-dependent insights

Climate warming is a pressing global issue with substantial impacts on soil health and function. However, the influence of environmental context on the responses of soil microorganisms to warming remains largely elusive, particularly in alpine ecosystems. This study examined the responses of the soil microbiome to in situ experimental warming across three elevations (3850 m, 4100 m, and 4250 m) in the meadow of Gongga Mountain, eastern Tibetan Plateau. Our findings demonstrate that soil microbial diversity is highly resilient to warming, with significant impacts observed only at specific elevations. Furthermore, the influence of warming on the composition of the soil microbial community is also elevation-dependent, underscoring the importance of local environmental context in shaping microbial evolution in alpine soils under climate warming. Notably, we identified soil moisture at 3850 m and carbon-to-nitrogen ratio at 4250 m as indirect predictors regulating the responses of microbial diversity to warming at specific elevations. These findings underscore the paramount importance of considering pre-existing environmental conditions in predicting the response of alpine soil microbiomes to climate warming. Our study provides novel insights into the intricate interactions between climate warming, soil microbiome, and environmental context in alpine ecosystems, illuminating the complex mechanisms governing soil microbial ecology in these fragile and sensitive environments.

The influence of environmental context on community composition in artificial rockpools associated with seawalls

Artificial structures have become widespread features of coastal marine environments, and will likely proliferate further over the coming decades. These constitute new hard substrata in the marine environment which provide a fundamentally different habitat than natural shores. Eco-engineering solutions aim to ameliorate these differences by combining ecological knowledge and engineering criteria in the construction and modification of artificial substrata. Vertipools™ are artificial bolt-on rockpools intended for deployment on seawalls, where they have been shown to provide biodiversity benefits. In this study, a total of 32 Vertipools were retrofitted on eight seawalls in different environmental contexts (estuarine vs marine and urban vs rural) along the Irish Sea coastline, and were exposed to the environment for a period of two years. After two years, there were no differences in species richness, species-abundance distributions, diversity, or community composition between the specific environmental contexts examined here. Site-level variation was significant, and communities on Vertipools deployed in marine contexts were more variable in general than those in estuarine contexts. Community composition differed significantly between structural sections of the Vertipools, indicating that different sections provide specific microhabitats for colonisation. This study indicates that Vertipools provide biodiversity benefits in a variety of environmental contexts, and therefore are broadly viable as an eco-engineering solution.

Perception and Attitudes of Residents Towards Green Spaces in Croatia – an Exploratory Study

Green spaces are important parts of urban infrastructure. COVID-19 pandemic and lockdown periods around the world have confirmed benefits that people derive from using green spaces for their physical and mental health. Green spaces need to meet the needs of users so that people can use them and benefit over time. It is important to consider users' perceptions and attitudes. User input proves beneficial in improving management practices. We investigated the differences in attitudes and perceptions of respondents from different large settlements in Croatia towards green spaces. Data on the use and perception of green spaces were collected in the first lockdown period in Europe and processed the part of the questionnaire on attitudes and perceptions towards green spaces. People have similar, mostly positive perceptions of green spaces regardless of the size of the settlement. Differences were found in the perception of disadvantages and needs related to the management of green spaces. This is the first study of the attitudes and perceptions on a large spatial scale in Croatia, so the results are exploratory and important. This study contributes to research on the social aspects of green spaces by investigating the influence of environmental context on perceptions and attitudes.

The influence of environmental context on spatial learning. Openness of the environment and spatial mental representations in the city of Venice

Field of view (FOV) allows us to perceive and learn our environment. Reducing the visual field impairs our ability to estimate distance and direction. It has been demonstrated that distance is estimated more accurately in outdoor environment (a lawn) than in indoors (hallway or lobby). This evidence suggests that features like width of environment, that is the openness of the environment that extends into periphery, might be important in affecting spatial representation. We studied route learning in Venice where features may or may not restrict the width of environment. Seventy participants learned narrow and wide routes from videos, then performed various spatial recall tasks. Results showed that environmental features that restricted the width of environment impaired participants’ pointing performance, and the metric properties of their mental representations. This study newly shows that environmental features naturally restricting the width of environment can influence the ability to form spatial mental representations.

Capital and new product quality in high-tech startups - an examination in two environmental contexts

ABSTRACTBased on the resource-based view (RBV), we investigated the effects on new product quality exerted by various types of capital, including human capital, innovation capital, and process capital, as well as their complementary interactions, and whether high or low technological turbulence in the environment moderates these effects. We collected data from 126 high-tech startups, and the results indicated that the effect of deploying human and process capital on new product quality is greater during periods of low technological turbulence, whereas that of deploying innovation capital remains the same regardless of turbulence. In addition, the results showed that high-tech startups that exert substantial effort in integrating finite resources create competitive advantages in highly technologically turbulent environments, but not in environments of low technological turbulence. Therefore, in circumstances in which resources are limited in a high-tech startup, managers should consider the influence of environmental contexts. Managers should not neglect the properties of a firm and its competitive position in the market during resource allocation.

No Detectable Broad-Scale Effect of Livestock Grazing on Soil Blue-Carbon Stock in Salt Marshes

Grassland capturing and storage (CCS) is thought to benefit from regulation of grazing. The impact is likely to depend on livestock density. Yet, few studies have tested this principle or evaluated the consistency of grazer-carbon relationships across multiple sites. We sampled four intertidal zones across 22 salt marshes along a 650 km stretch of coast in the UK to examine the impact of livestock density on globally important saltmarsh blue carbon stocks. Although there were marked impacts of grazing pressure on above ground vegetation composition, structure and biomass, there was no detectable relationship between grazing intensity and soil organic carbon, irrespective of tidal zone in the marsh or soil depth-layer analyzed. A substantial spatial variation in soil was instead explained by contextual environmental variables. There was evidence that compensatory responses by vegetation, such as increased root growth, countered loss from grazing impacts. Our work suggests that grazing effects on stocks are minimal on broader scales in comparison with the influence of environmental context. The benefits of grazing management to stores are likely to be highly context dependent.

The influence of environmental context in interpersonal observation-execution.

Cyclical upper-limb movements involuntarily deviate from a primary movement direction when the actor concurrently observes incongruent biological motion. We examined whether environmental context influences such motor interference during interpersonal observation-execution. Participants executed continuous horizontal arm movements while observing congruent horizontal or incongruent curvilinear biological movements with or without the presence of an object positioned as an obstacle or distractor. When participants were observing a curvilinear movement, an object located within the movement space became an obstacle, and, thus, the curvilinear trajectory was essential to reach into horizontal space. When acting as a distractor, or with no object, the curvilinear trajectory was no longer essential. For observing horizontal movements, objects were located at the same relative locations as in the curvilinear movement condition. We found greater involuntary movement deviation when observing curvilinear than horizontal movements. Also, there was an influence of context only when observing horizontal movements, with greater deviation exhibited in the presence of a large obstacle. These findings suggest that the influence of environmental context is underpinned by the (mis-)matching of observed and executed actions as incongruent biological motion is primarily coded via bottom-up sensorimotor processes, whilst the congruent condition incorporates surrounding environmental features to modulate the bottom-up sensorimotor processes.

Interpopulation resource partitioning of Lesser Frigatebirds and the influence of environmental context

Conspecific individuals inhabiting nearby breeding colonies are expected to compete strongly for food resources owing to the constraints imposed by shared morphology, physiology, and behavior on foraging strategy. Consequently, colony‐specific foraging patterns that effectively partition the available resources may be displayed. This study aimed to determine whether intraspecific resource partitioning occurs in two nearby colonies of Lesser Frigatebirds (Fregata ariel). A combination of stable isotope analysis and GPS tracking was used to assess dietary and spatial partitioning of foraging resources during the 2013 and 2014 breeding seasons. These results were compared to vessel‐derived estimates of prey availability, local primary productivity, and estimates of reproductive output to suggest potential drivers and implications of any observed partitioning. Isotopic data indicated a more neritic source of provisioned resources for near‐fledged chicks at an inshore colony, whereas their offshore counterparts were provisioned with resources with a more pelagic signal. Deep pelagic waters (>200 m) had higher availability of a preferred prey type despite a trend for lower primary productivity. Differences in foraging ecology between the two populations may have contributed to markedly different reproductive outputs. These findings suggest environmental context influences dietary and spatial aspects of foraging ecology. Furthermore, the effect of colony‐specific foraging patterns on population demography warrants further research.

Disturbance legacies and nutrient limitation influence interactions between grazers and algae in high elevation streams

Debate about control of interaction strength among species is fueled by variation in environmental contexts affecting food webs. We used extensive surveys and two field experiments to test the individual and interactive influences of variation in the assemblages and associated traits of grazers as shaped by the legacy of disturbance, nutrient limitation and the presence of top predators on the accrual of basal resources. We quantified hydrologic variation and streambed movement to describe the legacy of disturbance and sampled biota of 20 streams over five years in a high‐elevation catchment in Colorado, USA. Grazer assemblages switched from caddisfly‐dominated to mayfly‐dominated as disturbance increased. We manipulated the composition of grazer assemblages and the availability of nutrients (N and P) within flow‐through mesocosms assembled adjacent to 10 streams, and also deployed larger in‐stream channels manipulating the presence of top predators (brook trout) in five streams varying in disturbance regimes. In both experiments we compared the rate of accrual of benthic algae and the strength of grazer‐algal interactions among treatments. We observed no indirect effects of top predators on grazer mobility, grazer consumption of algae, or accrual of algal biomass (no trophic cascades). However, in both experiments accrual rates of algae yielded a unimodal pattern and grazer impacts on algae decreased with increasing disturbance, but only at ambient (limiting) nutrient conditions. When nutrients were amended in the mesocosm experiment, algal accrual was uniformly high and grazer impacts on algae were consistently low. Reduced algae accrual at high disturbance levels may be explained by direct effects of environmental harshness on algae, and at low disturbance by indirect effects on grazer traits (behaviors) rather than on grazer density. In more benign streams per capita and per unit biomass grazer impacts on algae were high and drift dispersal was low, both behaviors that reduced accrual of algae. We conclude that nutrient limitation and indirect effects of disturbance on accrual of algae mediated by grazer traits can be stronger than indirect effects of predators on algae, providing a new contribution to the debate about the influence of environmental context on the strength of food web interactions.

Place effects on noise annoyance: Cumulative exposures, odour annoyance and noise sensitivity as mediators of environmental context

Previous research suggests there may be combined effects of outdoor air pollution and traffic noise on noise annoyance, but it is not known how environmental context can moderate these effects. Physical attributes of the environment can influence relative levels of exposure, while sociocultural contexts can moderate environmental perceptions. Noise sensitivity is an important factor in appraisal, but previous research has not linked levels of sensitivity to contextual factors. The objectives of this study were to understand how a high-volume traffic corridor and pollution hotspot could influence co-exposures to air pollution and traffic noise and consequent levels of noise annoyance. Data from a community survey (n = 610) along with modelled estimates of residential traffic noise and nitrogen dioxide exposure were utilized for the analyses. The effective loudness function for noise annoyance and an ordinal location-scale model showed that varying levels of co-exposure to traffic noise and air pollution along with odour annoyances in the corridor and a control area had strong effects on the noise annoyance dose–response. The results also indicated that there was a significantly higher level of error in predicting noise annoyance in the corridor area. There appeared to be neighbourhood-level differences in the effect of noise sensitivity on noise annoyance. The findings have important implications for our understanding of multiple exposures along with the influence of environmental context on noise annoyance. In particular, this study demonstrates that research on the effects of traffic noise across large urban areas may conceal important phenomena occurring at the neighbourhood level.

Power wheelchair driving challenges in the community: a users’ perspective

Purpose: There is limited information on the difficulties individuals experience in manoeuvring their power wheelchairs during daily activities. The aim of this study was to describe the nature and context of power wheelchair driving challenges from the perspective of the user. Methods: A qualitative design using semi-structured interviews with power wheelchair users. Qualitative content analysis was used to identify themes. Results: Twelve experienced power wheelchair users were interviewed. Findings revealed that power wheelchair driving difficulties were related to the accomplishment of activities of daily living, and the influence of environmental context. Four key themes emerged: (1) difficulties accessing and using public buildings-facilities, (2) outdoor mobility, (3) problems in performing specific wheelchair mobility tasks/manoeuvres and (4) barriers and circumstances that are temporary, unforeseen or specific to a particular context. Conclusion: This qualitative study furthers our understanding of the driving difficulties powered wheelchair (PW) users experience during daily activities. This knowledge will assist clinicians and researchers in two areas: in choosing assessment measures that are ecologically valid for power wheelchair users; and, in identifying and refining the content of training programs specific to the use of power wheelchairs.Implications for RehabilitationA better understanding of the everyday challenges individuals experience in driving their power wheelchair will assist clinicians and researchers in:Choosing assessment measures and identifying training programs for this population.Refining the content of power wheelchair training programs.

Contributors to Women's Leadership Development in Christian Higher Education: A Model and Emerging Theory

A theory of women's leadership development within the context of Christian higher education is proposed, based on qualitative research involving 16 participants. Motivators to advance into leadership roles were: (a) a sense of relational responsibility; (b) awareness of calling and giftedness for leadership, and (c) a mentoring relationship or role model. These emerging leaders typically experienced both validation and resistance that shaped the trajectory of their leadership journeys. Validation contributed to greater self-efficacy, resulting in motivation to engage broader leadership; conversely, some leaders experienced resistance and devaluation. The emerging theory recognizes the influence of environmental context and self-awareness.

Forest mortality in high-elevation whitebark pine (Pinus albicaulis) forests of eastern California, USA; influence of environmental context, bark beetles, climatic water deficit, and warming

Whitebark pine ( Pinus albicaulis Engelm.) in subalpine zones of eastern California experienced significant mortality from 2007 to 2010. Dying stands were dense (mean basal area 47.5 m2/ha), young (mean 176 years), and even-age; mean stand mortality was 70%. Stands were at low elevations (mean 2993 m), on northerly aspects, and experienced warmer, drier climates relative to the regional species distribution. White pine blister rust was not observed; mountain pine beetle infestations were extensive. Ring widths were negatively correlated with climatic water deficit and positively correlated with water-year precipitation. Although trees that survived had greater growth during the 20th century than trees that died, in the 19th century trees that eventually died grew better than trees that survived, suggesting selection for genetic adaptation to current climates as a result of differential tree mortality. Air surveys (2006–2010) in the Sierra Nevada, Mt. Shasta, and Warner Mountains showed similar trends to the intensive studies. Observed mortality from air surveys was highest in the Warner Mountains (38%) and lowest in the Sierra Nevada (5%); northern aspects at lower elevations within each mountain region had the highest probabilities of mortality and dying stands had higher climatic water deficit. Scenarios for the future of whitebark pine in California are discussed.

Population‐level compensation impedes biological control of an invasive forb and indirect release of a native grass

The intentional introduction of specialist insect herbivores for biological control of exotic weeds provides ideal but understudied systems for evaluating important ecological concepts related to top-down control, plant compensatory responses, indirect effects, and the influence of environmental context on these processes. Centaurea stoebe (spotted knapweed) is a notorious rangeland weed that exhibited regional declines in the early 2000s, attributed to drought by some and to successful biocontrol by others. We initiated an experiment to quantify the effects of the biocontrol agent, Cyphocleonus achates, on Ce. stoebe and its interaction with a dominant native grass competitor, Pseudoroegneria spicata, under contrasting precipitation conditions. Plots containing monocultures of each plant species or equal mixtures of the two received factorial combinations of Cy. achates herbivory (exclusion or addition) and precipitation (May-June drought or "normal," defined by the 50-year average) for three years. Cy. achates herbivory reduced survival of adult Ce. stoebe plants by 9% overall, but this effect was stronger under normal precipitation compared to drought conditions, and stronger in mixed-species plots compared to monocultures. Herbivory had no effect on Ce. stoebe per capita seed production or on recruitment of seedlings or juveniles. In normal-precipitation plots of mixed composition, greater adult mortality due to Cy. achates herbivory resulted in increased recruitment of new adult Ce. stoebe. Due to this compensatory response to adult mortality, final Ce. stoebe densities did not differ between herbivory treatments regardless of context. Experimental drought reduced adult Ce. stoebe survival in mixed-species plots but did not impede recruitment of new adults or reduce final Ce. stoebe densities, perhaps due to the limited duration of the treatment. Ce. stoebe strongly depressed P. spicata reproduction and recruitment, but these impacts were not substantively alleviated by herbivory on Ce. stoebe. Population-level compensation by dominant plants may be an important factor inhibiting top-down effects in herbivore-driven and predator-driven cascades.

Effect of environmental context on false recognition

The influence of environmental context on false recognition was investigated by using two lists with different associative structures. Sixteen auditory to-be-remembered lists were presented to the participants. Eight were associated lists, consisting of items that were associated with lure items which were not presented in the study session. The remaining eight were category lists, consisting of category examples. A lure item of each category list was one of the category examples. In the study session, participants were asked to judge how imaginable the items were. The next day, participants engaged in a word recognition test that included the studied items and the lure items. The test was administered visually on a computer display either in the same room as the study session or in a different room. In the associated list condition, reinstatement of the environmental context increased both correct and false recognition. In the category list condition, only false recognition was increased by reinstatement of the environmental context. These results indicate that the reinstatement of the environmental context facilitates false recognition.

Environmental context effects on alcohol cognitions and immediate alcohol consumption

The present experimental study sought to demonstrate the effects of environmental context on accessibility of alcohol-related cognitions and immediate alcohol consumption. Fifty-six males were randomly assigned and exposed to either a simulated bar (alcohol contextual prime) or a neutral laboratory (neutral prime). Memory accessibility was measured using implicit memory association measures and immediate drinking behavior was measured unobtrusively using a taste-rating task. Contextually primed participants reported significantly more alcohol-related memory associations to ambiguous stimuli and exhibited significantly greater alcohol consumption than controls. These results strengthen support for the influence of environmental context on retrieval of alcohol cognitions in memory and on drinking behavior. Our findings complement theoretical assertions of the critical role of alcohol cognitions in directly influencing alcohol consumption.

Extension of a New Two-Trial Memory Task in the Rat: Influence of Environmental Context on Recognition Processes

A two-trial memory task, based on place or object exploration in a Y-maze, was developed to study recognition processes in young and aged Sprague–Dawley rats (Dellu et al., 1992). This paradigm avoids the use of electric shocks or deprivations that may have nonspecific effects, and the task does not require learning of a rule, i.e., involves essentially working memory. A number of behavioral parameters in several animals could be recorded automatically, thus allowing a detailed analysis of behavior and a simultaneous testing of several animals. We extended this task in order to evaluate the role of contextual information in recognition memory. When the contextual environment during acquisition and retrieval trials was unchanged, place recognition remained intact despite interpolated explorations. When the contextual environment during acquisition and retrieval trials was changed, object recognition was impaired. It was clearly shown that the correct choice between two discrete cues (e.g., small objects) is conditional on more diffuse environmental cues. Thus, it can be hypothesized that at least two kinds of recognition processes can be assessed in animals: an automatic process, based on a discrimination between familiarity and novelty, and a second process, more cognitively based and more effortful. In conclusion, the two-trial task in the Y-maze is sensitive, specific, and fast. It allows the study of both spatial and nonspatial memory, allows the study of different levels (automatic vs controlled) of cognitive processes and their neuroanatomical substrates, and may be profitably employed in aging studies and neuropharmacological research in general.

Influence of environmental context on tolerance to LSD-induced behavior in primates

Influence of environmental context on tolerance to LSD-induced behavior in primates

Context and conditioning: A place for space

Notions about the influence of environmental context on behavior are briefly reviewed and criticized. In contrast to the traditional view that a context is merely a compound CS, to be treated in learning theory in much the same way as simple CSs, we propose that contexts are superordinate to such CSs. Within this hierarchical relation, a context both contains and predicts CSs. This approach to environmental context derives from cognitive map theory (O’Keefe & Nadel, 1978), and predictions based on that theory and the present extension are offered for several conditioning paradigms.