Ecological transformation

生态转型
  • 文章类型: Journal Article
    Ecological transformations are occurring as a result of climate change, challenging traditional approaches to land management decision-making. The resist-accept-direct (RAD) framework helps managers consider how to respond to this challenge. We examined how the feasibility of the choices to resist, accept, and direct shifts in complex and dynamic ways through time. We considered 4 distinct types of social feasibility: regulatory, financial, public, and organizational. Our commentary is grounded in literature review and the examples that exist but necessarily has speculative elements because empirical evidence on this newly emerging management strategy is scarce. We expect that resist strategies will become less feasible over time as managers encounter situations where resisting is ecologically, by regulation, financially, or publicly not feasible. Similarly, we expect that as regulatory frameworks increasingly permit their use, if costs decrease, and if the public accepts them, managers will increasingly view accept and direct strategies as more viable options than they do at present. Exploring multiple types of feasibility over time allows consideration of both social and ecological trajectories of change in tandem. Our theorizing suggested that deepening the time horizon of decision-making allows one to think carefully about when one should adopt different approaches and how to combine them over time.
    La viabilidad dinámica de resistir (R), aceptar (A) o dirigir (D) el cambio ecológico Resumen Las transformaciones ecológicas ocurren por el cambio climático, lo que representa un reto para los enfoques tradicionales para decidir en torno a la gestión de tierras. El marco resistir‐aceptar‐dirigir (RAD) ayuda a los gestores a considerar cómo responder a este reto. Analizamos cómo la viabilidad de las opciones para resistir, aceptar y dirigir cambia de manera compleja y dinámica con el tiempo. Consideramos cuatro tipos distintos de viabilidad: regulatoria, económica, pública y de organización. Nuestro comentario está basado en la revisión bibliográfica y los ejemplos que existen, pero por necesidad tiene elementos especulativos ya que la evidencia empírica sobre esta estrategia emergente de gestión es escasa. Esperamos que las estrategias de resistir se vuelvan menos viables con el tiempo conforme los gestores encuentren situaciones en las que resistir no es viable de forma ecológica, económica, pública o por regulación. Al igual esperamos que cada vez más los marcos regulatorios permitan su uso, si el costo disminuye, y si el público los acepta, los gestores verán cada vez más viables las estrategias de aceptar y dirigir que las que utilizan actualmente. La exploración de varios tipos de viabilidad a lo largo del tiempo permite considerar las trayectorias sociales y ecológicas del cambio en conjunto. Nuestra teoría sugiere que profundizar en el horizonte temporal de las decisiones permite que se analice con cuidado sobre cuando se deben adoptar enfoques diferentes y cómo combinarlos con el tiempo.
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  • 文章类型: English Abstract
    福尔马林是病理学实验室的国际黄金标准固定剂。然而,考虑到其对个人和环境的有害影响,这并不是理想的选择。在不久的将来似乎不可能完全去除福尔马林或甚至取代福尔马林。在此更新中,我们提出了各种工具,允许将福尔马林的使用整合到生态养护方法中。其中,根据波尔多大学医院开发的方案,福尔马林回收易于实施,并提供快速和显着的结果,允许病理学专业人员实现法国2030年议程中包括的可持续发展目标。
    Formalin is the international gold-standard fixative in pathology laboratories. However it is not the ideal one considering its deleterious effects on individuals and the environment. Complete formalin removal or even substitution does not seem possible in the near future. In this update, we present various tools allowing to integrate the use of formalin into an ecocare approach. Among them, formalin recycling according to the protocol developed by the University Hospital of Bordeaux is simple to implement and delivers rapid and significant results, allowing pathology professionals to meet the sustainable development objectives included in the France 2030 agenda.
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  • 文章类型: Journal Article
    许多城市目前正在努力应对生态转型的挑战,特别是那些被归类为资源枯竭城市的城市。在这些城市地区,土地利用变化是一个备受关注的问题,由于不同的土地利用策略可能导致不同的结果,影响生态环境的多维度。生态系统健康评价反映了区域生态环境质量,是评价城市生态系统可持续性和稳定性的综合指标。为此,构建了预测未来四种发展情景(四种生态转型模式)下土地利用变化的多目标优化模型,使用石嘴山市(中国),位于生态脆弱地区的资源枯竭城市,作为一个例子。采用“活力-组织-复原力”评估框架从三个维度评估每种情景下的生态系统健康状况。研究结果表明:(1)石嘴山市2022年和未来不同发展情景的平均生态健康水平排序为:低碳经济发展情景(0.302)>生态经济协调发展情景(0.291)>基线情景(0.290)>经济发展情景(0.281)>2022(0.248)。(2)与2022年相比,四种生态转型模式下的生态系统健康水平均有所提高,改善领域占60%以上,石嘴山市生态转型的迫切需要。其中,低碳经济发展情景展示了最大的改善区域,达到75.81%。(3)生态系统活力被确定为影响该区域生态健康的主导维度。本研究强调了多目标发展需求,为评估资源枯竭型城市未来生态转型模式的综合生态效应提供了一种综合生态系统健康评价方法。
    Numerous cities are currently grappling with the challenge of ecological transformation, especially those categorized as resource-exhausted cities. In these urban areas, land use change is a highly scrutinized issue, as different land use strategies can lead to varied outcomes, impacting the ecological environment in multiple dimensions. Assessing ecosystem health reflects the quality of the regional ecological environment and serves as a comprehensive indicator for evaluating the sustainability and stability of urban ecosystems. To this end, a multi-objective optimization model was constructed to predict land use changes under four future development scenarios (four ecological transformation modes), using Shizuishan City (China), a resource-exhausted city situated in an ecologically fragile area, as an example. The \"vigor-organization-resilience\" assessment framework was employed to evaluate the ecosystem health conditions in each scenario from three dimensions. The study results showed: (1) The ranking of the average ecological health levels in Shizuishan City for 2022 and different future development scenarios is as follows: Low-Carbon Economic Development Scenario (0.302) > Ecological-Economic Coordinated Development Scenario (0.291) > Baseline Scenario (0.290) > Economic Development Scenario (0.281) > 2022 (0.248). (2) Compared to 2022, the ecosystem health levels under the four ecological transformation modes had all improved, with improvement areas accounting for over 60 %, highlighting the urgent necessity of ecological transformation in Shizuishan City. Among them, the Low-Carbon Economic Development Scenario exhibited the largest improvement area, reaching 75.81 %. (3) Ecological system vitality was identified as the dominant dimension influencing the ecological health in this region. This study emphasized multi-objective development needs and provided an integrated ecosystem health assessment method for assessing the comprehensive ecological effects of future ecological transformation modes in resource-exhausted cities.
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  • 文章类型: Journal Article
    Pinyon-juniper(PJ)林地是美国西部旱地生态系统的重要组成部分,并且可能容易发生生态转变。然而,预测林地期货由于在干旱条件下持续和繁殖的特定物种策略而变得复杂,未来气候的不确定性,以及从森林清单数据推断人口比率的局限性。这里,我们利用新的人口模型来量化预计气候变化如何改变美国西部五个PJ树种的人口统计数据,并将我们的结果置于气候适应框架的背景下进行抵制,接受,或直接生态转型。五个研究物种中的两个,马尾松和Juniperusmonosperma,预计人口会下降,受死亡率上升和招聘率下降的驱动。这些下降在各种气候期货中相当一致,由于未来的气候,人口增长的不确定性程度小于由于人口比率将如何应对气候变化而导致的不确定性。我们评估管理的有效性,以减少树木密度和减轻竞争,并使用结果将西南林地划分为(a)不太可能且可以被动抵制的区域,(b)很可能但可能会受到积极管理的抵制,以及(c)可能不可避免的,要求管理者接受或指导轨迹。预计人口下降将促进西南偏暖和偏干的PJ社区的生态转型,涵盖我们网站的37.1%-81.1%,取决于未来的气候情景。预计将从PJ转变的站点中,只有不到20%的站点有可能通过密度降低来保留现有的树木组成。我们的结果揭示了这种适应策略在未来几十年中可以成功抵抗生态转型的地方,并允许在PJ林地的地理范围内采用组合设计方法。
    Pinyon-juniper (PJ) woodlands are an important component of dryland ecosystems across the US West and are potentially susceptible to ecological transformation. However, predicting woodland futures is complicated by species-specific strategies for persisting and reproducing under drought conditions, uncertainty in future climate, and limitations to inferring demographic rates from forest inventory data. Here, we leverage new demographic models to quantify how climate change is expected to alter population demographics in five PJ tree species in the US West and place our results in the context of a climate adaptation framework to resist, accept, or direct ecological transformation. Two of five study species, Pinus edulis and Juniperus monosperma, are projected to experience population declines, driven by both rising mortality and decreasing recruitment rates. These declines are reasonably consistent across various climate futures, and the magnitude of uncertainty in population growth due to future climate is less than uncertainty due to how demographic rates will respond to changing climate. We assess the effectiveness of management to reduce tree density and mitigate competition, and use the results to classify southwest woodlands into areas where transformation is (a) unlikely and can be passively resisted, (b) likely but may be resisted by active management, and (c) likely unavoidable, requiring managers to accept or direct the trajectory. Population declines are projected to promote ecological transformation in the warmer and drier PJ communities of the southwest, encompassing 37.1%-81.1% of our sites, depending on future climate scenarios. Less than 20% of sites expected to transform away from PJ have potential to retain existing tree composition by density reduction. Our results inform where this adaptation strategy could successfully resist ecological transformation in coming decades and allow for a portfolio design approach across the geographic range of PJ woodlands.
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  • 文章类型: Journal Article
    增加火灾的严重程度和温度,较干燥的火灾后条件使美国西部(西部)的森林容易受到生态转型的影响。然而,森林变化的这些驱动因素之间的相对重要性和相互作用仍未解决,特别是在未来几十年。这里,我们评估了气候变化和野火活动的相互作用如何影响334场野火后针叶树的再生,使用来自10,230个田间地块的火后针叶树再生数据集。我们的发现突显了过去四十年来西方研究的八种优势针叶树种的再生能力下降。火后再生对高烈度火灾敏感,这限制了种子的可用性,和火灾后的气候,这影响了幼苗的建立。在短期内,预计低和高严重火灾情景之间的招募概率差异大于大多数物种的预计气候变化影响,这表明火灾严重程度的降低,以及由此对种子可用性的影响,可以部分抵消预期的气候驱动的火灾后再生下降。在40%到42%的研究区域,我们预测,在未来的气候情景下(2031年至2050年),在低严重度但不是高严重度的火灾之后,火后针叶树可能会再生。然而,越来越温暖,预计干旱气候条件最终将超过火灾严重程度和种子可用性的影响。研究区域的百分比被认为不太可能经历针叶树再生,不管火灾的严重程度,从1981年的5%增加到2000年的26%到本世纪中叶的31%,强调有限的时间窗口,在该时间窗口中,降低火灾严重程度的管理措施可以有效地支持火后针叶树的再生。
    Increasing fire severity and warmer, drier postfire conditions are making forests in the western United States (West) vulnerable to ecological transformation. Yet, the relative importance of and interactions between these drivers of forest change remain unresolved, particularly over upcoming decades. Here, we assess how the interactive impacts of changing climate and wildfire activity influenced conifer regeneration after 334 wildfires, using a dataset of postfire conifer regeneration from 10,230 field plots. Our findings highlight declining regeneration capacity across the West over the past four decades for the eight dominant conifer species studied. Postfire regeneration is sensitive to high-severity fire, which limits seed availability, and postfire climate, which influences seedling establishment. In the near-term, projected differences in recruitment probability between low- and high-severity fire scenarios were larger than projected climate change impacts for most species, suggesting that reductions in fire severity, and resultant impacts on seed availability, could partially offset expected climate-driven declines in postfire regeneration. Across 40 to 42% of the study area, we project postfire conifer regeneration to be likely following low-severity but not high-severity fire under future climate scenarios (2031 to 2050). However, increasingly warm, dry climate conditions are projected to eventually outweigh the influence of fire severity and seed availability. The percent of the study area considered unlikely to experience conifer regeneration, regardless of fire severity, increased from 5% in 1981 to 2000 to 26 to 31% by mid-century, highlighting a limited time window over which management actions that reduce fire severity may effectively support postfire conifer regeneration.
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  • 文章类型: Journal Article
    在中国西南部干热山谷(DHV)等脆弱的生态系统中,通常会将废弃土地(主要是稀树草原)转变为农田,旨在提高土地生产力和进行生态恢复。然而,转化对土壤微生物群落和稀树草原生态系统碳周转的影响尚不清楚,因为稀树草原可能是一个重要但被忽视的碳汇。为了说明土地利用变化(LUC)对稀树草原生态系统的生态后果,在中国西南地区的DHV进行了为期1年的田间试验。土壤性质,微生物呼吸,研究了两种不同土地利用类型(草地和芒果人工林)的宏基因组学,以揭示区域LUC对土壤C周转和微生物性状的影响。从退化草地到农田的转变增加了土壤小气候对微生物群落组成的贡献,减少了土壤含水量(SWC)的约束,并进一步降低了养分利用率。LUC重塑了土壤细菌群落的组成和结构。具体来说,属于放线菌和变形菌的土壤优势微生物经转化显著富集,虽然属于更广泛门的稀有微生物通常被耗尽,导致社区多样性总体下降。此外,LUC引起的土壤特性和微生物群落的变化进一步降低了土壤的多功能性以及微生物的碳利用效率。在LUC之后观察到增强的微生物呼吸和土壤CO2排放的显着增加,这可能导致土壤微生物群落组成和功能(如生长和再生)的变化。总之,通过同时减少对SWC的限制和减少营养素的可用性,在DHV中从退化草地到农田的转化降低了土壤微生物多样性和多功能性,增加了微生物呼吸和土壤CO2排放。我们的研究为理解LUC在DHV等生态脆弱地区土壤碳周转中的作用和机制提供了新的见解。
    Conversion of abandoned land (mainly savanna) into cropland generally occurs in fragile ecosystems such as dry-hot valleys (DHVs) in southwest China, with the intent of increasing land productivity and conducting ecological restoration. However, the effects of conversion on soil microbial communities and carbon turnover of savanna ecosystems remain unclear, since savannas could be a vital but overlooked carbon sink. To illustrate the ecological consequences of land-use change (LUC) for savanna ecosystems, a 1-year field experiment was conducted in DHVs of southwest China. The soil properties, microbial respiration, and metagenomics from two different land-use types (grassland and mango plantation) were examined to reveal the effects of regional LUC on soil C turnover and microbial traits. Conversion from degraded grassland into cropland increased the contribution of soil microclimate to the microbial community composition, reduced the constraints of soil water content (SWC), and further decreased nutrient availability. LUC reshaped the composition and structure of soil bacterial communities. Specifically, soil dominant microbes that belonged to Actinobacteria and Proteobacteria were significantly enriched by conversion, while rare microbes that belonged to a wider range of phyla were generally depleted, leading to an overall decrease in community diversity. In addition, LUC-induced changes in soil characteristics and microbial communities further decreased soil multifunctionality as well as the carbon use efficiency of microbes. Intensified microbial respiration and a significant increase in the soil CO2 efflux were observed following LUC, which could drive changes in soil microbial community composition and functions (such as growth and regeneration). In summary, through simultaneously reducing constraints on SWC and decreasing nutrient availability, conversion from degraded grassland to cropland in a DHV decreased soil microbial diversity and multifunctionality, and increased microbial respiration and soil CO2 efflux. Our study provides new insights for understanding the role and mechanisms of LUC in soil carbon turnover in ecologically fragile areas such as DHVs.
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  • 文章类型: Journal Article
    基于循环经济的实践,中国于2018年正式提出建设“零浪费城市”的目标,并制定了一系列措施,以促进各行业的节能减排,其中工业由于其长期的高能耗和高污染而受到重点关注。城市经济的增长不能靠工业来支撑,但是工业的高能耗和高污染已经成为城市环境管理的关键,产业生态化转型的需求十分迫切。基于我国零浪费城市的建设背景,本研究分析了工业生产者生态转型意愿的转型因素。影响工业生产者进行生态转型的因素是对参与的感知,对成本的感知,对身份的感知,以及对政府干预的看法。这些因素对工业生产者采取转型战略具有积极的调节作用,其中政府参与的感知也起着中介作用,对促进工业生产者积极生态转型具有重要影响。
    Based on the practice of a circular economy, China officially put forward the goal of building a \"Zero Waste City\" in 2018 and has formulated a series of measures to promote energy savings and emissions reduction in various sectors among which industry has received key attention due to its long-term high energy consumption and high pollution. The growth of an urban economy cannot be supported by industry, but the high energy consumption and high pollution of industry have become the keys to urban environmental management, and the need for ecological transformation of industry is very urgent. Based on the construction background of zero waste cities in China, this study analyzes the transformation factors of industrial producers\' willingness to make ecological transformation. The factors that influence industrial producers to make ecological transformation are perception of participation, perception of cost, perception of identity, and perception of government intervention. These factors have a positive moderating effect on the adoption of transformation strategies by industrial producers among which the perception of government involvement also plays a mediating role and has an important influence on the promotion of active ecological transformation by industrial producers.
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  • 文章类型: Journal Article
    矿产资源型城市的生态转型是推进我国生态文明建设、实现经济社会可持续发展的关键。现有研究忽视了转型过程中公众参与对其他主体的影响,这对于解决MRBC生态化改造面临的困境至关重要。鉴于此,从利益相关者的角度来看,本研究构建了一个新的进化博弈模型,由政府共同参与,企业,和社会因素(SF)(包括公共、自媒体,和非政府组织)。本文讨论了主要各方的利益及其相互关系,揭示了MRBC生态转型困境的因果机制和影响因素。我们的结果表明,三方博弈主体之间策略的演变和收敛表现出很强的交互性。首先,单一的产业结构,监管效率低,生态意识薄弱大大增加了转型成本,从而加剧了MRBC转化的困境。第二,转型强度和综合收益是影响转型的重要因素,不同过渡阶段影响因素的作用强度不同,这意味着不同阶段的政策重点不同。第三,在推进企业生态化转型的过程中,政府监管和SF监管具有显著的互补效应。然而,高强度监管对SF参与意愿有显著的挤出效应。因此,政府需要平衡监管强度和SF参与意愿。与现有研究相比,本研究全面反映了我国MRBC生态化改造的复杂动态博弈过程,可为我国促进MRBC生态化改造的政策提供参考。
    The ecological transformation of the mineral resource-based cities (MRBCs) is the key to promoting the construction of ecological civilization and realizing the sustainable development of the social economy and society in China. Existing research ignores the influence of public participation on other subjects in the process of transformation, which is essential to solve the dilemma faced by the ecological transformation of MRBCs. In view of this, from the perspective of stakeholders, this study constructs a new evolutionary game model, which is jointly participated in by the government, enterprises, and social factors (SF) (including public, self-media, and non-governmental organizations). This paper discusses the interests of the main parties and their inter-relationships and reveals the causal mechanism and influencing factors of the dilemma of the ecological transformation of the MRBCs. Our results demonstrate that the evolution and convergence of strategies among the tripartite game agents exhibit strong interaction. First, the single industrial structure, low regulatory efficiency, and weak ecological awareness substantially increase the cost of transformation, thus exacerbating the dilemma of MRBC transformation. Second, the transformation intensity and comprehensive income are important factors affecting the transformation, and the effect intensity of influencing factors in different transition stages is different, which implies that the focus of policies in different stages is different. Third, in the process of promoting enterprise ecological transformation, government supervision and SF supervision have significant complementary effects. However, high-intensity supervision has a significant crowding-out effect on the willingness of SF to participate. Therefore, the government needs to balance the intensity of supervision and willingness of SF to participate. Compared with the existing research, this study comprehensively reflects the complex dynamic game process of the ecological transformation of MRBCs in China and can provide a reference for the policy of promoting the ecological transformation of MRBCs in China.
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  • 文章类型: Journal Article
    通过生态改造可以提高海岸线的整体活力和质量;生态状况评估可以通过提出海岸线改造方案来科学指导这种改造。本研究以深港深圳湾区为研究区域,通过设计数据处理代码,构建指标体系,并将其与定量和定性相结合,计算,并通过MATLAB平台进行分析,目的是在分析结果的基础上提出海岸线改造的方向和建议。研究结果和结论如下:(1)深圳湾海岸线生态改造的关键是水质,滨海湿地恢复,景观多样性,海滩稳定性,和基础设施改善。(2)促进这些方面的行动包括水污染的整体海岸线控制,文化景观种植,改善现有基础设施,以及选定海滩沙地的恢复,红树林湿地,侵蚀海岸线。建议包括来自公众对信息获取和科学教育的需求的关键支持,除了政策和管理之外,所有这些都应该制定到改造计划中。该指标体系可应用于国内外其他地区,基于指标体系的结果和结论也可以为规划生态转型过程提供标准。
    The overall vitality and quality of the coastline can be improved through ecological transformation; ecological status assessment can scientifically guide this modification by putting forward a transformation plan for the coastline. This study took the Shenzhen Bay area between Hong Kong and Shenzhen as the study area to build an index system and combined it with quantitative and qualitative methods by designing the code of data processing, calculation, and analysis through the MATLAB platform, with the goal being to put forward the directions and suggestions for coastline transformation based on the analysis of results. The results and conclusions are as follows: (1) The key aspects of the ecological transformation of the Shenzhen Bay Coastline are water quality, coastal wetland restoration, landscape diversity, beach stability, and infrastructure improvement. (2) Actions to promote these aspects include overall shoreline control of water pollution, cultural landscape implantations, the improvement of existing infrastructure, and the restoration of selected beach sand regions, mangrove wetlands, and eroded shorelines. Suggestion includes the critical support which comes from the public needs for information acquisition and science education, in addition with the policy and management, all should be formulated into the transformation plan. The index system can be applied to other regions at home and abroad, and the results and conclusions based on the index system could also provide criteria for planning the ecological transformation process.
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  • 文章类型: Journal Article
    不断变化的干扰制度和气候可以克服森林生态系统的复原力。发生严重火灾后,森林恢复可能会因缺乏树木种子来源而受到损害,火后气候更温暖更干燥,或短间隔重燃。恢复力丧失的潜在结果是将火灾前森林转换为不同的森林类型或非森林植被。转换意味着主要,广泛的,优势物种的持久变化,生命形式,或功能,对生态系统服务的影响。在本文中,我们综合了越来越多的证据,证明了整个北美西部的火驱动转化以及我们对其原因的理解。我们评估我们预测转化的能力,并强调重要的不确定性。森林对火灾活动和气候变化的脆弱性日益增加,迫使管理方法发生变化,我们提出了由科学家和管理者共同制作的应用研究的关键主题,以支持在火灾前森林可能无法恢复的时代的决策。
    Changing disturbance regimes and climate can overcome forest ecosystem resilience. Following high-severity fire, forest recovery may be compromised by lack of tree seed sources, warmer and drier postfire climate, or short-interval reburning. A potential outcome of the loss of resilience is the conversion of the prefire forest to a different forest type or nonforest vegetation. Conversion implies major, extensive, and enduring changes in dominant species, life forms, or functions, with impacts on ecosystem services. In the present article, we synthesize a growing body of evidence of fire-driven conversion and our understanding of its causes across western North America. We assess our capacity to predict conversion and highlight important uncertainties. Increasing forest vulnerability to changing fire activity and climate compels shifts in management approaches, and we propose key themes for applied research coproduced by scientists and managers to support decision-making in an era when the prefire forest may not return.
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