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1.
Planning for the remediation of multiple threats is crucial to ensure the long term persistence of biodiversity. Limited conservation budgets require prioritizing which management actions to implement and where. Systematic conservation planning traditionally assumes that all the threats in priority sites are abated (fixed prioritization approach). However, abating only the threats affecting the species of conservation concerns may be more cost-effective. This requires prioritizing individual actions independently within the same site (independent prioritization approach), which has received limited attention so far. We developed an action prioritization algorithm that prioritizes multiple alternative actions within the same site. We used simulated annealing to find the combination of actions that remediate threats to species at the minimum cost. Our algorithm also accounts for the importance of selecting actions in sites connected through the river network (i.e., connectivity). We applied our algorithm to prioritize actions to address threats to freshwater fish species in the Mitchell River catchment, northern Australia. We compared how the efficiency of the independent and fixed prioritization approach varied as the importance of connectivity increased. Our independent prioritization approach delivered more efficient solutions than the fixed prioritization approach, particularly when the importance of achieving connectivity was high. By spatially prioritizing the specific actions necessary to remediate the threats affecting the target species, our approach can aid cost-effective habitat restoration and land-use planning. It is also particularly suited to solving resource allocation problems, where consideration of spatial design is important, such as prioritizing conservation efforts for highly mobile species, species facing climate change-driven range shifts, or minimizing the risk of threats spreading across different realms.  相似文献   

2.
In the debates regarding the ethics of human enhancement, proponents have found it difficult to refute the concern, voiced by certain bioconservatives, that cognitive enhancement violates the autonomy of the enhanced. However, G. Owen Schaefer, Guy Kahane and Julian Savulescu have attempted not only to avoid autonomy‐based bioconservative objections, but to argue that cognition‐enhancing biomedical interventions can actually enhance autonomy. In response, this paper has two aims: firstly, to explore the limits of their argument; secondly, and more importantly, to develop a more complete understanding of autonomy and its relation to cognitive enhancement. By drawing a distinction between the capacity for autonomy and the exercise and achievement of autonomy, and by exploring the possible effects of cognitive enhancement on both competence and authenticity conditions for autonomy, the paper identifies and explains which dimensions of autonomy can and cannot, in principle, be enhanced via direct cognitive interventions. This allows us to draw conclusions regarding the limits of cognitive enhancement as a means for enhancing autonomy.  相似文献   

3.
We consider an attempt – within an economy under pressure to stay competitive in an increasingly integrated global economic system – to reconcile the contradictory pressures of democratic values versus managerial efficiency, and of the desire for an effective social welfare safety net versus the need for budgetary responsibility. We focus on a local welfare committee's experimental attempt to improve morale and productivity through a combination of added resources and greater autonomy. The better but more expensive service produced by the experiment triggered the paradoxical conclusion that what was needed was tighter administrative oversight. The experiment and its evaluation became a kind of self–fulfilling prophecy. We explore the conceptual, ideological, and economic factors that shape the government's reaction, and then offer a theory of word meaning, usage, and power in public discourse that accounts for the discussion and the actions that flow from it.  相似文献   

4.
This paper explores clinicians’ and scientists’ accounts of genomic research in cancer care and the complexities and challenges involved with delivering this work. Contributing to the sociology of (low) expectations, we draw on sociological studies of uncertainty in medicine to explore their accounts of working with uncertainty as part of the management of patient and institutional expectations. We consider their appeals to the importance of modest inquiry and framing of the uncertainties of genomic medicine as normal and at times welcome as they sought to configure professional autonomy and jurisdictions and cultivate an experimental ethos amongst their patients. We argue that these types of uncertainty work [Star, S. L. 1985. “Scientific Work and Uncertainty.” Social Studies of Science 15 (3): 391–427] are a key feature of managing expectations at the intersections of genomic research and clinical care.  相似文献   

5.
Huxtable R  Möller M 《Bioethics》2007,21(3):117-126
The Dutch case of Brongersma presents novel challenges to the definition and evaluation of voluntary euthanasia since it involved a doctor assisting the suicide of an individual who was (merely?) ‘tired of life’. Legal officials had called on the courts to ‘set a principled boundary’, excluding such cases from the scope of permissible voluntary euthanasia, but they arguably failed. This failure is explicable, however, since the case seems justifiable by reference to the two major principles in favour of that practice, respect for autonomy and beneficence. Ultimately, it will be argued that those proponents of voluntary euthanasia who are wary of its use in such circumstances may need to draw upon ‘practical’ objections, in order to erect an otherwise arbitrary perimeter. Furthermore, it will be suggested that the issues raised by the case are not peculiarly Dutch in nature and that, therefore, there are lessons here for other jurisdictions too.  相似文献   

6.
Orientalist discourse relies on the relational epistemology in which the authenticity of the self co-emerges with the authenticity of the other. The cultural definition of authentic ethnic cuisine is discursively constructed through the identification of racialized otherness which also implies the ‘de-racialized’ cultural competency of cosmopolitan consumers. A critical discourse analysis of online restaurant reviews in selected US cities reveals that claims to authenticity in the gastronomical experience involving East Asian cuisine are predicated on the deployment of a racialized Orientalist narrative. We examine five themes: (1) racialized authentic otherness, (2) generalized racial temperament, (3) Orientalist destinations, (4) the authenticity of whiteness, and (5) self-Orientalism by the racialized alterity. We conclude that the production of a racial signification of the ‘Oriental other’ is linked to the authenticity of cultural otherness which, in turn, is connected to the authenticity of the consumer experience.  相似文献   

7.
Franz Samelson 《Genetica》1997,99(2-3):145-151
Shortly after the death, in 1971, of Cyril Burt, a prominent British psychologist, the authenticity of his accounts of intelligence test results from the largest reported sample of MZA's (monozygotic twins reared apart) was challenged. Charges of fraud by Burt's critics and countercharges by his supporters started an acrimonious battle of words in journals, books, and the mass media that seesawed over the decades. It is still not resolved. The problematic ways in which the scientific community and its major organizations and journal editors have dealt or failed to deal with the problem are discussed. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

8.
TOM WALKER 《Bioethics》2013,27(7):388-394
There is widespread agreement that it would be both morally and legally wrong to treat a competent patient, or to carry out research with a competent participant, without the voluntary consent of that patient or research participant. Furthermore, in medical ethics it is generally taken that that consent must be informed. The most widely given reason for this has been that informed consent is needed to respect the patient's or research participant's autonomy. In this article I set out to challenge this claim by considering in detail each of the three most prominent ways in which ‘autonomy’ has been conceptualized in the medical ethics literature. I will argue that whilst these accounts support the claim that consent is needed if the treatment of competent patients, or research on competent individuals, is to respect their autonomy, they do not support the claim that informed consent is needed for this purpose.  相似文献   

9.
江南  徐卫华  赵娟娟  肖燚 《生物多样性》2021,29(10):1288-27
我国建立国家公园的主要目的是保护自然生态系统的原真性、完整性, 然而原真性的概念尚不明确, 评估方法亟待建立。本文尝试厘清原真性的概念, 讨论其在保护实践中的价值, 探究生态系统原真性的评价方法, 以期提升国家公园体制建设和自然保护地规划管理的科学性; 并以长白山地区为例, 基于森林清查数据, 从植被角度选取起源方式、优势树种、林龄和单位蓄积4项指标构建森林生态系统原真性评价指标体系, 建立权重系数、原真性值计算公式和等级划分标准。评价结果显示, 研究区域森林生态系统原真性值为0.69, 和龙市、安图县、抚松县、临江市和长白朝鲜族自治县分别为0.70、0.71、0.67、0.60和0.63。原真性从高到低5个等级的面积之比为9 : 44 : 33 : 11 : 3, 原真性高与极高的森林面积比例占53%, 空间分布呈现以长白山主峰为中心向东、北、西逐渐降低的趋势。建议基于对区域生态系统原生状态的全面了解, 加强不同尺度、组成要素的原真性指标体系及评价方法研究。  相似文献   

10.
Forest fragmentation can affect various aspects of population dynamics, but few investigators have assessed possible effects on the behavior of a species. Loss of habitat may limit population recruitment and abundance, which may alter breeding dynamics in forest remnants. We examined the lekking behavior of White-throated Manakins (Corapipo gutturalis) in a fragmented landscape to determine if forest fragmentation affected the spatial distribution of display courts and male behavior at courts. We captured and observed males at 19 courts located in 11 primary forests of different sizes in forest habitats of the Biological Dynamics of Forest Fragments Project area, an experimentally fragmented landscape located in the central Brazilian Amazon, and estimated their spatial distribution as the distance to the nearest court in the landscape. We quantified habitat loss using the proportion of forest cover surrounding courts and their distances to forest edges. No courts were detected in 1-ha forest fragments, suggesting direct effects from habitat loss following fragmentation that affected connectivity and thus recruitment and persistence of courts in the smallest fragments. The spatial distribution of display courts in forests larger than 10 ha remained unaltered, compared to display courts in continuous forests, but adult males were less numerous on courts with a higher percentage of forest cover and they displayed less on courts closer to forest edges. The spatial distribution of courts also contributed to variation in male social behavior, with more juvenile males present and adult males displaying at lower rates at more isolated courts. Although White-throated Manakins are locally common, the observed behavioral changes in response to habitat loss may affect their population dynamics. Our results show the importance of assessing behavioral changes in conservation programs and, in particular, of including biologically relevant measures of habitat loss in addressing its possible effects on species persistence in fragmented landscapes.  相似文献   

11.
The White-bearded Manakin is a passerine specially noted for elaborate courtship. Each resident male has a cleaned oval court delimited by saplings in leks. No study mentions the use of more than one court by a territorial male during the breeding season. We report the use of auxiliary courts by males in the lowland forest of southeastern Brazil and discuss its probable function in attracting females for mating. Additionally, we experimentally modified a male’s main courts, testing that auxiliary courts serve as alternative display places. Twelve males from four different leks were observed for 145 h. Six males used from one to four auxiliary courts located 1.0 to 8.1 m from their main courts. The males that also used auxiliary courts displayed more than males that used only the main court. Nevertheless, the proportion of female visits per display time indicates that males that used only the main court have greater efficiency in attracting potential mates. Individual males responded differently to the experimental modification of their main courts, but one male avoided the modified court. The use of auxiliary courts may be a strategy adopted mainly by peripheral males to attract females that visit more successful males with central territories on the lek. In the short term, auxiliary courts function as optional display places in cases of loss of the main court. In the long term, the use of auxiliary courts may be involved in the temporal persistence of lek areas.  相似文献   

12.
Kenyon GM 《老年与社会》1996,16(6):659-675
The increasing use of biographical materials in research and intervention in the field of ageing gives rise to significant ethical issues. In this inquiry, four of these issues are explicated. First, the notion of informed consent is explored in relation to selected contexts of research and intervention in ageing and biography. Second, the issues of autonomy and competence are considered from the point of view of identifying contexts where biography is a prerequisite for ethically responsive action. The third ethical issue concerns respecting the groundrules of various biographical approaches. Finally, the notions of authenticity and truth in lifestories are explored in an attempt to clarify the limitations and expectations of ageing and biography. The discussion of these ethical issues proceeds on the basis of an argument that indicates the fundamental importance of biographical ageing or the stories we are.  相似文献   

13.
We have argued that differences in success in Icelandic fishing are statistically explained more by technical and ecological factors than by personal qualities of skippers, the "skipper effect." Research by other scholars has reopened the discussion of the skipper effect. We assess some of the statistical arguments, pointing out that while there may be a strong skipper effect in some societies, in other societies it is weak or negligible. We suggest that it is important to distinguish between the statistical reality of the skipper effect and its sociology and that the concept of skipper effect is of limited utility in comparative studies, since different researchers using it have not always been talking about the same phenomena and fishing success is conceived differently in different societies. The discussion of the skipper effect echoes debates on resource management and the authenticity of folk models, as well as larger debates in social theory on the relationship between the symbolic and the real and the role of history and agency. Folk theories of production, we argue, are best regarded as cultural accounts constructed in social discourse, in the context of production systems.  相似文献   

14.
In his book The future of human nature, Jürgen Habermas argues against a scenario of liberal eugenics, in which parents are free to prenatally manipulate their children’s genetic constitution via germline interventions. In this paper, I draw attention to the fact that his species‐ethical line of argument is pervaded by a substantial ambiguity between an argument from actual intervention (AAI) and an argument from mere controllability (AMC). Whereas the first argument focuses on threats for the autonomy and equality of prenatally modified persons, the second argument takes all human beings, whether they have been modified or not, into account. Hence, when invoking Habermas in these debates, bioethicists need to consider carefully which argument they are referring to.  相似文献   

15.
Anthropological accounts of Vanuatu's independence have emphasised both the materiality of land alienation and the importance of kastom (custom) as a symbol of cultural practice, political resistance and national unity in accounts of decolonisation and postcolonial nation‐making. For 74 years indigenous ni‐Vanuatu were stateless and lacked all forms of citizenship and nationality in the Anglo‐French Condominium of the New Hebrides (1906–1980). This article situates anthropological accounts of land, kastom and the state in Vanuatu's transition to independence in relation to statelessness, citizenship and hierarchies of ethnographic authenticity within the geo‐classificatory frameworks of colonial rule established by the condominium. The embodiment of citizenship and demands to end the cumulative humiliations of statelessness that ni‐Vanuatu experienced in the condominium illuminate both tensions and continuities in idealist and materialist accounts of Melanesian nationalisms evident in kastom and land as they were mediated by the emancipatory claims and promises of postcolonial citizenship.  相似文献   

16.
Non-medical sex selection is premised on the notion that the sexes are not interchangeable. Studies of individuals who undergo sex selection for non-medical reasons, or who have a preference for a son or daughter, show that they assume their child will conform to the stereotypical roles and norms associated with their sex. However, the evidence currently available has not succeeded in showing that the gender traits and inclinations sought are caused by a “male brain” or a “female brain”. Therefore, as far as we know, there is no biological reason why parents cannot have the kind of parenting experience they seek with a child of any sex. Yet gender essentialism, a set of unfounded assumptions about the sexes which pervade society and underpin sexism, prevents parents from realising this freedom. In other words, unfounded assumptions about gender constrain not only a child’s autonomy, but also the parent’s. To date, reproductive autonomy in relation to sex selection has predominantly been regarded merely as the freedom to choose the sex of one’s child. This paper points to at least two interpretations of reproductive autonomy and argues that sex selection, by being premised on gender essentialism and/or the social pressure on parents to ensure their children conform to gender norms, undermines reproductive autonomy on both accounts.  相似文献   

17.
国家公园保护管理的首要目的是有效保护国家重要自然生态系统原真性和完整性。我们提出了面向管理的中国国家公园原真性与完整性概念, 国家公园原真性是指国家公园内生态系统及构成国家公园价值或与国家公园价值紧密联系的自然与文化要素保持在原生状态, 强调“不受损”; 国家公园完整性是指国家公园具有足够面积和充分的组成要素, 以维持生态系统的结构、功能与过程, 维持自然区域的价值与特征, 强调“不缺失”。我们还提出了国家公园原真性和完整性评价框架, 从自然度、气候变化强度、传统文化及其载体的真实性、人类干扰程度、人与自然和谐关系的原真性5个方面评价国家公园原真性; 从生态系统组成完整性、生态系统结构完整性、生态系统功能完整性、景观组成要素完整性和文化景观的完整性5个层面评价国家公园完整性。此外, 我们还提出了国家公园原真性与完整性保护的建议, 包括重塑保护管理目标、更新保护管理理念与提升保护管理技术3个方面。国家公园原真性与完整性的讨论尚未成熟, 对评价指标设定、指标间的相互关系、保护管理技术等的研究均尚待深入。  相似文献   

18.
Local policies for immigrants in recent years have attracted a growing interest among scholars. It is increasingly accepted that they are distinct units of analysis in the governance of migration, with significant degrees of autonomy with regard to national policies. Most of the literature, however, deals with the inclusive role of local policies. The argument of this article, on the contrary, is the development of local policies aimed to exclude migrants from various kinds of benefits and rights. It is based on a pilot research, conducted in Lombardy (northern Italy), on seventy cases, referred to forty-seven different local authorities. Then, the outcome of these policies is analysed: the exclusion of migrants is a tool to seek political consent, but is also a battlefield, where anti-discrimination institutions, advocacy groups and courts react against the measures approved by local authorities.  相似文献   

19.
People may express high concern for global warming or environmental degradation, but when forced to evaluate the severity of environmental threats in relation to other threats, environmental threats are pushed to the bottom of the list. The present study was based on the premise that prioritizing threats involves, inter alia, hierarchizing the threats according to their perceived temporal proximity and since environmental threats are perceived, relative to other threats, as more temporally distant, they rank low. Future orientation (FO) is an individual-difference variable that describes the tendency to take into account temporally distant considerations. We predicted that environmental threats would be evaluated as more severe by individuals who were more future-oriented. The strongest effect of FO was found to be on concern about global warming and environmental degradation. This indicated that environmental threats were perceived as temporally farthest and, not surprisingly, received the lowest priority. External security threat was a top-priority; its severity evaluation was uncorrelated to FO, indicating that it was perceived as temporally closest. These evaluations significantly affected environmental attitudes and behavior. The implications on promoting environmental behavior in the presence of ever-existing shorter-term existential threats are discussed.  相似文献   

20.
Habitat loss is one of the greatest threats to species persistence. Gauging the scale of this problem requires quantitative methods that can predict the number of extinctions resulting from habitat loss. For the past three decades, the species–area relationship, an empirical relationship between the number of species present in an area and the size of that area, has been this tool. However, it fails to incorporate threats to species aside from habitat loss and the heterogeneous distribution of these threats across habitats. Recent studies have improved species–area predictions by incorporating not only direct effects of area on richness, but also indirect effects of area (through area‐mediated predator abundance), on prey species richness. We extend this work to test the hypotheses that the indirect effects of the multiple threats of grazing and trampling in addition to fragmentation will amplify the effect of area on species richness and that this effect will be greatest in zones closest to the fragment edge. Further, we test for species and population level effects of fragmentation and grazing, including the non‐random pattern of species loss and the decline in population sizes. We test our hypotheses with a field study of land snail richness in fragments with and without the additional threats of grazing and trampling. Our study supports the hypotheses that fragments with multiple threats in addition to habitat loss harbour fewer species than fragments without these threats, and that this effect is non‐uniform across fragments, populations and species.  相似文献   

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