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1.
Considerable attention has been devoted to the effects of people and their vehicles on birds and mammals, but possible effects on reptiles in populated areas have received less attention. Moreover, the effects of human activities on reptile reproductive success itself has been harder to demonstrate. This paper examines the effect of management of off-road vehicles in New Jersey’s pinelands on the reproductive success of pine snakes (Pituophus melanoleucus) from 1986 to 2005. We used the percentage of snakes in each hibernaculum that were young of the year (hatchlings) as an indicator of reproductive success, and compared this percent for five hibernacula that were in an area with varying degrees of off-road vehicle (ORV) disturbance, with 12 hibernacula in areas with no ORV disturbances (reference sites). This percent took into account differences in absolute numbers from one location to another, and over time due to hibernacula destruction (by people or predators) and natural variations (food supply). The ORV pressure in the pinelands is intense because it lies within the most densely populated urban area in the United States. Although the number of snakes in the reference hibernacula varied over the years from 46 to 63, the percent of young in these hibernacula did not vary significantly over the 20 year period (21–29%). In contrast, the percent-young in the disturbed sites differed significantly in years without ORV disturbance (28%) compared to those with ORV disturbance (15 and 16%, P < 0.01). Further, there were no differences between the percent of young in the reference sites and those in the disturbed site in years without ORV disturbance. ORV disturbance ceased only with the creation of large dirt berms coupled with fences that could not be easily broken. These data indicate the importance of having detailed population data on pine snakes in hibernacula, on ORV use (or indications of such use), and of managing ORV use to protect sensitive populations. Maintenance of healthy pine snake populations in urban areas may require continued adaptive management.  相似文献   

2.

Human development and disturbances can be determinants of population viability of some vertebrates in human-impacted ecosystems. The effects on the behavior and population dynamics of reptiles are not well-studied in urban environments. This paper examines the importance of pine forest clearings, openings, and paleodunes for nesting pine snakes (Pituophis melanoleucus melanoleucus) in the New Jersey Pinelands, and the risk to nesting females and offspring from off-road vehicles (ORV). In this ms we 1) develop a rating scale for ORV activity that can be modified for evaluating risk to other vertebrates, 2) compare general habitat features of nesting areas used in the early 1980s with those used in 2020, and 3) examine the fate of nesting areas used in the 1980s and the intensity of ORV use in both time periods. In 2020, nests were located at only 2 of the 10 nesting areas used in 1983 (20%), and only one of the 10 was a paleodune. In comparison, in 2020, 9 of 13 new nesting areas were on paleodunes (69%). In 1983, ORV activity on nesting areas ranged from very low to medium. In the intervening years development and ORV activity increased markedly, and snakes abandoned most areas by 2020. ORV activity in those sites still utilized for nesting increased to high and very high. In 2020, ORV activity ranged from very low (7%) to very high (19%) of the 42 nests. With increasing urban development, nesting pine snakes are using mainly paleodunes deep in the forest, and are exposed to high or very high ORV activity (43%), suggesting concern for viable snake populations in the wake of continued human activity and ORV use.

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3.
Considerable attention has been devoted to the effects of people on birds and mammals, usually in wilderness or semiwilderness, but relatively little has been directed at reptiles in heavily populated areas. This paper examines the role of investigators and pedestrians on Northern water (Nerodia sipedon) and Eastern garter (Thamnophis sirtalis) snakes basking along a canal in New Jersey. The protocol involved 1–3 investigators approaching snakes that were basking between a path and the Raritan Canal. Investigators walked along the path until they were perpendicular to the snake, observed them for 60 seconds, and then approached them directly. Nearly 40% of the variability in distance to first respond for water snakes (N = 135) was accounted for by distance the snake was from the path, number of observers, and number of people currently using the trail, while 27% of the variability in time to respond was accounted for by number of observers, distance to path and water, and air temperature. There was no significant model for garter snakes (N = 33). Nearly 30% of water snakes, but only 5% of garter snakes, responded during the approach of an observer, and another 32% of water and 45% of garter snakes responded within the first minute of stopping on the trail nearest to them. Water snakes responded when the observer was farther away from them than did garter snakes. As the number of pedestrians on the path increased, water snakes responded when people were farther from them, but there were no differences for garter snakes in response distance. These data indicate differences in response, with water snakes responding sooner than garter snakes. Few garter snakes responded when they were over 150 cm from the path, while a quarter of the water snakes responded when they were from 200 to 300 cm from the path, suggesting that paths should be at least 400 cm from water, providing safe basking sites for water snakes. Further, the data indicate that walking past snakes without stopping results in less disturbance than stopping to watch them.  相似文献   

4.
Investigations of urbanization effects on birds have focused mainly on breeding traits expressed after the nest-building stage (e.g. first-egg date, clutch size, breeding success, and offspring characteristics). Urban studies largely ignored how and why the aspects of nest building might be associated with the degree of urbanization. As urban environments are expected to present novel environmental changes relative to rural environments, it is important to evaluate how nest-building behavior is impacted by vegetation modifications associated with urbanization. To examine nest design in a Mediterranean city environment, we allowed urban great tits (Parus major) to breed in nest boxes in areas that differed in local vegetation cover. We found that different measures of nest size or mass were not associated with vegetation cover. In particular, nests located adjacent to streets with lower vegetation cover were not smaller or lighter than nests in parks with higher vegetation cover. Nests adjacent to streets contained more pine needles than nests in parks. In addition, in nests adjacent to streets, nests from boxes attached to pine trees contained more pine needles than nests from boxes attached to other trees. We suggest that urban-related alterations in vegetation cover do not directly impose physical limits on nest size in species that are opportunistic in the selection of nesting material. However, nest composition as reflected in the use of pine needles was clearly affected by habitat type and the planted tree species present, which implies that rapid habitat change impacts nest composition. We do not exclude that urbanization might impact other aspects of nest building behaviour not covered in our study (e.g. costs of searching for nest material), and that the strengths of the associations between urbanization and nest structures might differ among study populations or species.  相似文献   

5.
Sonoran Desert habitat in southern Arizona is increasingly altered by urban development near metropolitan areas. Understanding how reptiles respond in these impacted habitats is critical to conservation efforts to retain intact biotic communities, especially those with a high diversity of reptile species. We surveyed snakes at one impacted site on the northern edge of the Phoenix metropolitan area in desert/urban interface, and at another site in a desert/rural interface near Florence, Arizona. The site near Phoenix was lower in species richness (15 spp.), and evenness: two snake species accounted for 75 % of all snakes encountered (total = 420). The site near Florence was higher in species richness (19 spp.), and a more even community: no species accounted for more than 20 % of snakes encountered (total = 594). Sampling methodology had a strong influence on species richness and abundance of snakes at the respective sites: road riding, coverboards, and traps each provided evidence of unique species missed by other methods. These results were compared with inventories at three other sites in the central Sonoran Desert of Arizona, and are consistent with the view that the impacted site near Phoenix is uneven, potentially as a result of a single species reacting to shifts in prey availability.  相似文献   

6.
Monk parakeets (Myiopsitta monachus) are the most abundant and widely distributed of the naturalized parrots in the United States. Their presence is simultaneously encouraged by some humans (through use of bird feeders) and discouraged by others (through removal of their nests) and, as a result, they show an interesting spatial distribution across urban areas. We used an online public survey and field surveys to examine the influence of human activities and land use on the distribution of this exotic species around Chicago, IL (USA). These efforts resulted in detection of 249 nesting structures and approximately 778 birds across the region. A CART analysis successfully separated nesting sites from random sites and correctly classified 90?% of the nesting sites. The most important factor in the model was land use, with nests typically found in areas with less than 84?% residential zoning. We found nests on a wide variety of substrates including trees, cell phone towers, and stadium lights. Spatial point pattern analysis indicated that nests in trees and nests in built substrates were significantly dissociated with each other at all scales. Nests on built substrates were closer to railroads and highways or in areas with lower human population density, suggesting either a difference in substrate availability or human tolerance between these settings. While humans may have a positive effect on distribution of monk parakeets at large spatial scales, at the scale of this study we see a potentially negative effect of too many humans on the distribution of monk parakeet nests.  相似文献   

7.
In Britain, very young mixed-parentage children are more likely to receive state care than any other children. However, despite a dramatic increase in the number of multiracial families, their experiences have received little research attention. This article reviews the research on the experiences of vulnerable and poor multiracial families. Three areas of concern emerge—the relationship between family structure, locality and racism, disadvantage and oppression; the impact on family life of structurally reinforced and culturally defined gender roles; and the strengths and limitations of current early years research and practice. Suggestions are made about ways in which early years professionals might develop their practice with young vulnerable multiracial families.  相似文献   

8.
In this paper we examine the management of human-double-crested cormorant conflicts in urban nature areas using the Leslie Street Spit in Toronto, Ontario as our focal study area. We examine the management perspectives of various stakeholders and how they shift over time in response to site ecology and stakeholder input. We categorize management perspectives on a spectrum from complete human domination to near absence of human intention. Two broad management categories emerge from this framework: interventionist and laissez-faire. Interventionists recognized need for management of cormorants, laissez-faire argued for no management of a cormorant colony that has deforested 24% of the site through their nesting activities. We conclude that for urban nature areas, particularly those with a unique, rare, or contentious ecology, a hands-off, laissez-faire management approach is not conducive to improving human-nature relations. Rather, for urban nature sites nature management must promote a respectable balance between human and non-human life, for the long-term benefit of both.  相似文献   

9.
As urbanization increases, the identification of nest predators becomes important for avian conservation and management of urban wildlife communities. We investigated bird nest predation using artificial nests in urban areas of the KwaZulu-Natal (KZN) Province of South Africa. From June 2013 through February 2014 we installed seventy-five artificial nests in 25 suburban gardens in the Ethekwini and Msunduzi municipalities of KZN. Euplectes spp. nests were used and baited with two quail-sized, hand-made, silicon eggs. These were placed in residential gardens and monitored by camera traps for 2-weeks in winter, spring and summer respectively. Generally bird nesting occurs throughout the year in KZN’s subtropical climate, with some avoidance during the autumn season. Therefore, experiments were not conducted during autumn, as fresh nests were not available for use. Overall the rate of predation on artificial nests was 25 % (n = 19), with vervet monkeys Ceropithecus aethiops pygerythrus predating 20 % (n = 17) of the nests while domestic cats Felis catus predated 3 % (n = 2) of nests. Nest predation was significantly higher in the winter season, with 79 % of depredations occurring in winter (n = 15), 16 % in spring (n = 3) and 5 % in summer (n = 1), and in areas with less canopy cover. Our results suggest that vervet monkeys may have a negative impact on nesting birds in urban environments, however, in order to assess the rate of predation experiments on natural nests coupled with information on fledgling success is deemed necessary to investigate avian population declines.  相似文献   

10.
Hadeda Ibis (Bostrychia hagedash) have increased in population size and expanded in range in South Africa possibly as a result of increased use of exotic trees for nesting and roosting in urban areas. We investigated the urban nesting and roosting sites of the Hadeda Ibis by measuring tree height and species used by Hadeda Ibis for nesting and roosting in Pietermaritzburg, KwaZulu-Natal, South Africa. We expected Hadeda Ibis nests and roosts to have habitats, like wetlands, to be within 10 km of the roost or nest tree. Hadeda Ibis nest and roost locations were mapped using ArcGIS and available resources (grasslands, wetlands, plantations, other natural water sources) 10 km around each roost and nest tree were determined. Results showed that Hadeda Ibis use exotic trees for nesting and roosting in urban areas more than indigenous trees. This may be because exotic trees are more available in urban environments, particularly those trees that have ornamental value. Hadeda Ibis did not nest and roost closer to expected resources. Although previously associated with wetlands, Hadeda Ibis in urban environments were not close to natural water sources. This can be explained by swimming pools providing accessible drinking water and well watered lawns providing suitable foraging habitat therefore allowing them to roost and nest in this urban habitat.  相似文献   

11.
Previous research has shown that children and young people who are looked after are vulnerable to poor life outcomes, including early pregnancy. This paper examines how experiences of being looked after may contribute to teenage pregnancy. Using in‐depth interviews, data were collected from 63 young people recently looked after who are aged 15–24 and 78 professionals, across four research sites. The young people reported feelings of loneliness, rejection, stigma and not being able to trust others, emotions which seriously influenced their decisions about becoming parents. The findings suggest that such young people may benefit from a greater degree of emotional and practical support throughout their lives in care. Copyright © 2006 Institute of Education, University of London.  相似文献   

12.
This article draws on the findings from the qualitative phase of a New Zealand longitudinal study concerning vulnerable young people’s transitions to adulthood. The young people, aged between 12 and 17 at the time of the first interview had sustained exposure to harm (abuse, violence, addictions, disengagement from school and mental health issues) and were clients of statutory and non-governmental services including: child welfare services, juvenile justice services, remedial education services and mental health services. Qualitative interviews explored young people’s experiences of services, their key transitions, their coping capacities, and the strategies they used to locate support and resources to mitigate the effects of harmful events and environments. There were three stages to the qualitative phase of the study; this article draws on the interviews from stage one and two. It explores the idea of resistance which emerged as a key theme in the data analysis. Three thematic clusters are presented: the nature of young people’s resistance; practitioner responses to resistance; and harnessing resistance in interventions. The article concludes with a discussion of how social workers and other practitioners can understand resistance and build more responsive and meaningful relationships with vulnerable youth.  相似文献   

13.
The possibilities which information and communication technologies (ICT) offer people (or groups) to overcome the friction of distance and the constraints of materiality mean that these technologies are seen to have particular relevance in rural areas which have been historically characterised in terms of their economic and social perpheriality. In this paper, we draw on empirical research with children and their teachers and parents, to explore the opportunities which ICT are seen to offer young people living in rural areas. First, we examine the information that children access on-line and how young people make sense of this expanded terrain. Second we focus on communication, by considering children's use of email and chat rooms. Third, we explore how this information and these modes of communication may be shaping young people's sense of place in the world. Our findings expose a clear contrast between the ambitious and future orientated ways in which adults imagine ICT will expand their children's educational and employment opportunities, and social and spatial horizons, and the everyday ways in which these technologies actually emerge for children in practice.  相似文献   

14.
This article presents the findings of a participatory qualitative study investigating the role and potency of identity and meaning in the lives of vulnerable young people. In-depth interviews with 24 young people revealed the importance of connectedness in fostering positive identity and meaning in vulnerable young people's lives. Five critical domains for building positive identity and meaning emerged: caring relationships; participation and contribution within their communities; achieving a sense of belonging; competence; and hope. Young people's experiences uncovered that connectedness lies at the heart of all of these domains, and is therefore the pathway for vulnerable young people to attain positive identity and meaning. The findings reinforce what we know about the importance of connectedness for vulnerable young people and provided insights into how young people want to be supported with these issues. This article critically examines some of the difficulties for support workers in facilitating connectedness for young people and considers why these connections are not always developed. Practical suggestions are provided for how youth support workers may be able to overcome these challenges.  相似文献   

15.
This article explores the qualitative process findings from an evaluation of Project Jump — a sexual health drama project for hard to reach young people. Project Jump aimed to enable young people to consider their sexual behaviour and its impact and consequence on other people and themselves. The research aimed to capture the experiences and perceptions of young people's involvement in the project, particularly in relation to the use of drama as a medium for learning. Findings from young people demonstrate that drama can offer an important alternative to traditional health promotion in that young people articulated positive aspects of their involvement. These included enthusiastic participation, empowerment and sexual health skills acquisition. In addition, critical areas for consideration for policy‐makers and practitioners in employing a drama‐based approach particularly in relation to effective identification, engagement and ongoing follow‐up activity with vulnerable groups are highlighted. © 2006 University of the West of England. Journal compilation © 2006 National Children's Bureau.  相似文献   

16.
This article shares the dilemmas that emerge from a community service project that engages students in a systematic critique of the juvenile justice system from the inside. It explores how competing images of youth (as dangerous thugs, vulnerable children and kids who have made bad choices) coexist uneasily within the juvenile justice system and significantly shape and constrain this community service learning project. They influence how volunteers understand their experiences and relationships with students inside, and they shape how young people in the system speak about their own lives, the inequalities they see around them, and the juvenile justice system itself. By exploring these dynamics this article aims to develop a more nuanced understanding of youth voice.  相似文献   

17.
ABSTRACT

Young people belonging to categories and living in areas that are targeted by the police find more arguments for detailed police critique than others. When they narrate their assessments there is a series of experiential references being made, which can be used to sort out their police critique. This article draws on 20 interviews with ethnic minority youth in so-called vulnerable neighborhoods in Sweden. It shows how young people portray the police as sometimes profiling and racist, sometimes just and legitimate, and how they do so by comparisons and identifications. Comparisons within Sweden and identifications with police targets tend to result in more negative assessments whereas comparisons with countries of origin and identifications with non-targeted categories may result in more positive or mixed assessments. These young people also evaluate the police with reference to the stigmatization of their neighborhoods. To be stopped because you are associated with a residential area is described as deeply unfair, even if the police are polite, and observations of how the police change behavior in different areas promote critique. Our findings point to the importance of extending a criteria-based model of how today’s young people assess the police with a more social and ethnographic understanding.  相似文献   

18.
Research has largely focused on ‘unaccompanied minors’ as a vulnerable group at risk of developing psychological problems that affect their health. Separation from primary caregivers is considered one of the foremost reasons for these young people’s proposed loneliness. Thus, the official and ascribed identity is that they are lonely and that loneliness is their major problem. But research has seldom given the young people themselves an opportunity to express their views in an attempt to trace the often situational, dynamic and complex nature of social and emotional life. The present article analyses how ‘unaccompanied minors’ talk about everyday life and themes related to loneliness. The authors followed 23 ‘unaccompanied minors’ during a period of a year through ethnographic observations and qualitative interviews. Results: Loneliness may occur when these young people experience lack of control in managing life and when they feel no one grieves for them; loneliness may be dealt with by creating new social contacts and friends; loneliness may be reinforced or reduced in encounters with representatives from ‘the system’; the young people may experience frustration about being repeatedly labeled ‘unaccompanied’ and they may create a resistance to and critical reflexivity towards this labeling.  相似文献   

19.
Rural communities and well‐being: a good place to grow up?   总被引:1,自引:0,他引:1  
This study looks at young people's accounts of life in communities in rural northern Scotland, and considers in what ways affective and social aspects of community are bound up with well‐being, over and above young people's concerns for the future, rural youth transitions, and out‐migration. Interviews were held with 15–18 year‐olds in four study areas (16 groups, N=60+) and a parallel survey of 11–16 year‐olds was conducted in eight study areas (N=2400+). Themes to emerge from the interviews included: opportunities locally, the future and staying on, as well as local amenities and services; but older teenagers also spoke at length about their social lives, family and social networks, and their community, both as close‐knit and caring and as intrusive and controlling. Rural communities were seen as good places in childhood, but not necessarily for young people. In parallel with that, the survey data paints a picture where feelings of support, control, autonomy, and attachment were all associated with emotional well‐being. Importantly, links between emotional well‐being and practical, material concerns were outweighed by positive identifications of community as close‐knit and caring; and equally, by negative identifications as intrusive and constraining, where the latter was felt more strongly by young women. Certainly, beliefs about future employment and educational opportunities were also linked to well‐being, but that was over and above, and independently of, affective and social aspects of community life. Additionally, migration intentions were also bound up with sense of self and well‐being, and with feelings about community life; and links between thoughts about leaving and community life as controlling and constraining were, yet again, felt more strongly by young women. Thus, gender was a key dimension affecting young people's feelings about their communities with significant implications for well‐being, and out‐migration. The study illustrates the importance of understanding the experiences young people have of growing up in rural areas, and how they evaluate those experiences: particularly, how life in rural communities matters for young people's well‐being; and especially, for young women.  相似文献   

20.
This paper considers how parents are affected by and play a role in the lives of their young adult children. The years during which young people make the transition to adulthood has changed significantly in recent years--this transition now takes place over a longer period of time. We describe how young people experience these years; how they affect their parents and parent-child relationships; and how this time period is experienced by vulnerable youth.  相似文献   

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