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Structure and function of the western Baffin Bay coastal and shelf ecosystem 巴芬湾西部海岸和陆架生态系统的结构与功能
IF 3.9 3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00015
S. Pedro, M. Lemire, Carie Hoover, B. Saint-Béat, M. Y. Janjua, J. Herbig, M. Geoffroy, G. Yunda-Guarin, Marie-Ange Moisan, Justin Boissinot, J. Tremblay, M. Little, L. Chan, M. Babin, T. Kenny, F. Maps
Arctic marine species, from benthos to fish and mammals, are essential for food security and sovereignty of Inuit people. Inuit food security is dependent on the availability, accessibility, quality, and sustainability of country food resources. However, climate change effects are threatening Inuit food systems through changes in abundance and nutritional quality of locally harvested species, while foundational knowledge of Arctic food webs remains elusive. Here, we summarized scientific knowledge available for the western Baffin Bay coastal and shelf ecosystem by building a food web model using the Ecopath with Ecosim modeling framework. Based on this model, we calculated ecological network analysis indices to describe structure and function of the system. We used Linear Inverse Modeling and Monte Carlo analysis to assess parameter uncertainty, generating plausible parameterizations of this ecosystem from which a probability density distribution for each index was generated. Our findings suggest that the system is controlled by intermediate trophic levels, highlighting the key role of Arctic cod (Boreogadus saida) as prey fish, as well as the importance of other less studied groups like cephalopods in controlling energy flows. Most of the ecosystem biomass is retained in the system, with very little lost to subsistence harvest and commercial fisheries, indicating that these activities were within a sustainable range during the modeling period. Our model also highlights the scientific knowledge gaps that still exist (e.g., species abundances), including valued harvest species like Arctic char (Salvelinus alpinus), walrus (Odobenus rosmarus), and seals, and importantly our poor understanding of the system in winter. Moving forward, we will collaborate with Inuit partners in Qikiqtarjuaq, NU, Canada, to improve this modeling tool by including Inuit knowledge. This tool thus serves as a starting point for collaborative discussions with Inuit partners and how its use can better inform local and regional decision-making regarding food security.
从底栖动物到鱼类和哺乳动物,北极海洋物种对因纽特人的粮食安全和主权至关重要。因纽特人的粮食安全取决于国家粮食资源的可得性、可及性、质量和可持续性。然而,气候变化的影响正在通过改变当地收获的物种的丰度和营养质量来威胁因纽特人的食物系统,而北极食物网的基础知识仍然难以捉摸。本文利用Ecopath与Ecosim建模框架建立了西部巴芬湾沿海和陆架生态系统的食物网模型,总结了现有的科学知识。在此基础上,我们计算了生态网络分析指标来描述系统的结构和功能。我们使用线性逆建模和蒙特卡罗分析来评估参数的不确定性,生成该生态系统的合理参数化,从中生成每个指标的概率密度分布。我们的研究结果表明,该系统是由中间营养水平控制的,突出了北极鳕鱼(Boreogadus saida)作为猎物的关键作用,以及其他研究较少的群体,如头足类动物,在控制能量流动方面的重要性。大部分生态系统生物量被保留在系统中,只有很少的生物量被用于维持生计的收获和商业渔业,这表明这些活动在模拟期间处于可持续范围内。我们的模型还强调了仍然存在的科学知识差距(例如物种丰度),包括有价值的收获物种,如北极炭(Salvelinus alpinus),海象(Odobenus rosmarus)和海豹,以及重要的是我们对冬季系统的了解不足。展望未来,我们将与加拿大奇奇塔瓦克的因纽特人合作伙伴合作,通过纳入因纽特人的知识来改进这一建模工具。因此,该工具可作为与因纽特人合作伙伴进行协作讨论的起点,以及如何利用该工具更好地为地方和区域粮食安全决策提供信息。
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引用次数: 2
Historic and recent trends of cyanobacterial harmful algal blooms and environmental conditions in Clear Lake, California: A 70-year perspective 历史和最近的趋势蓝藻有害藻华和环境条件在清湖,加利福尼亚:70年的观点
3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00115
Jayme Smith, Emily Eggleston, Meredith D. A. Howard, Sarah Ryan, John Gichuki, Karola Kennedy, Alix Tyler, Marcus Beck, Stephen Huie, David A. Caron
Clear Lake is a large, natural lake in northern California, USA, with many beneficial uses but also substantive environmental issues. The lake has a long history of water quality problems including mercury contamination, pesticide usage, invasive species, and high rates of primary production. In recent years, an increase in cyanobacterial harmful algal blooms (cyanoHABs) has been documented in the lake, adding to the environmental issues faced by aquatic species present in the lake and the local community. Extensive observations of various physical, chemical, and biological parameters in Clear Lake began in the mid-1900s. The most pertinent of these data sets and findings have been reviewed and analyzed with the intent of improving our understanding of the causes and drivers of cyanoHABs, toxin production, and identifying data gaps. Several parameters including average annual water temperature have remained relatively constant over the past 70 years, although the seasonally averaged water temperatures have shifted in a manner that may now favor cyanobacterial dominance. Clear Lake has also witnessed recent changes in several environmental variables such as total phosphorus concentrations that might contribute to blooms. An analysis of lake conditions prior to and following the enactment of a total maximum daily load (TMDL) for phosphorus in 2007 indicates little measurable influence on total phosphorus concentrations in Clear Lake. The present trajectory of lake chemistry suggests that additional research and management efforts will be needed to address the recurrence of cyanoHABs in the future. Future lake management strategies should include consideration of the role of internal nutrient loads to lessen cyanoHABs. Furthermore, a better understanding of cyanobacterial community interactions and top-down effects on bloom formation within the lake can help guide future cyanoHAB management strategies.
克利尔湖是美国加利福尼亚州北部的一个大型天然湖泊,有许多有益的用途,但也有实质性的环境问题。该湖的水质问题由来已久,包括汞污染、农药使用、入侵物种和高初级生产力。近年来,湖中蓝藻有害藻华(cyanoHABs)的增加已经被记录在案,增加了湖中水生物种和当地社区面临的环境问题。从20世纪中期开始,对清湖的各种物理、化学和生物参数进行了广泛的观察。对这些数据集和发现中最相关的数据集进行了审查和分析,目的是提高我们对蓝藻有害藻、毒素产生的原因和驱动因素的理解,并确定数据空白。在过去的70年里,包括年平均水温在内的几个参数保持相对恒定,尽管季节性平均水温已经以一种可能有利于蓝藻优势的方式发生了变化。清湖也见证了最近几个环境变量的变化,如总磷浓度,这可能导致水华。对2007年磷总最大日负荷(TMDL)颁布前后湖泊状况的分析表明,对清湖总磷浓度的可测量影响很小。目前的湖泊化学轨迹表明,未来需要更多的研究和管理工作来解决蓝藻有害藻华的复发问题。未来的湖泊管理策略应包括考虑内部营养负荷对减少蓝藻有害藻华的作用。此外,更好地了解蓝藻群落的相互作用和自上而下对湖内水华形成的影响可以帮助指导未来的蓝藻藻华管理策略。
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引用次数: 0
How can China’s coal cities achieve high-quality development?—An empirical study based on the “resource curse” hypothesis 中国煤炭城市如何实现高质量发展?——基于“资源诅咒”假说的实证研究
3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00067
Li Zhang, Jun Wang, Yin Zhi, Xinzhu Liu
The relationship between the utilization of natural resources and high-quality economic growth has always been a concern of the academic community. China’s coal cities to varying degrees suffer from population outflow, economic stagnation or even negative growth, precipitous drop in housing prices, serious environmental damage, and other problems. There is a negative correlation from the perspective of location between the enrichment of coal resources and economic development in China, confirming the existence of coal “resource curse” in China’s interprovincial scope. Through establishing quantitative models. This article analyzes the transmission mechanism of the nonlinear impact of coal industry development on regional total factor productivity (TFP) from the 2 paths of industrial structure evolution and factor allocation efficiency. The sample panel data of 44 coal cities in China from 2003 to 2017 are examined to empirically test the impact of coal industry development in China’s coal cities on TFP and its transmission mechanism. In the coal industry development, the service industry is being squeezed out to some degree, while the manufacturing industry is suffered from “double deindustrialization” and severe shrinkage. Such an industrial structure transformation is one of the transmission paths of “resource curse.” The development of human capital (HC) and finance has a threshold effect on the impact of the coal industry development on the TFP of coal cities. The excessive growth of coal industry has a restraining effect on the development level of HC and finance that influences the efficiency of resource allocation, resulting in failure of such industries to promote the TFP. With the improvement of HC and finance sectors in coal cities, the development of coal industry has promoted the TFP. Therefore, this article holds that the government should aim at improving the efficiency of factor allocation, formulate scientific and reasonable industrial adjustment policies, upgrade industrial structure, and actively develop manufacturing and producer services. Meanwhile, in the process of coal city development, it should pay attention to improving HC input, actively develop green finance industry to promote the development of capital market, and promote the green transformation of coal industry. Actively develop new sources of energy. The sustainable development of coal cities should be guided according to different life cycle stages in order to achieve healthy and sustainable development and break the “resource curse.”
自然资源利用与高质量经济增长之间的关系一直是学术界关注的问题。中国煤炭城市不同程度地存在人口外流、经济停滞甚至负增长、房价暴跌、环境破坏严重等问题。从区位角度看,中国煤炭资源富集与经济发展呈负相关关系,证实了中国省际范围内煤炭“资源诅咒”的存在。通过建立定量模型。本文从产业结构演化和要素配置效率两条路径出发,分析了煤炭产业发展对区域全要素生产率非线性影响的传导机制。本文利用2003 - 2017年中国44个煤炭城市的样本面板数据,实证检验煤炭城市煤炭产业发展对全要素生产率的影响及其传导机制。在煤炭产业发展中,服务业受到一定程度的挤压,制造业“双去工业化”,萎缩严重。这种产业结构转型是“资源诅咒”的传播路径之一。人力资本和金融发展对煤炭产业发展对煤炭城市全要素生产率的影响具有阈值效应。煤炭产业的过快增长对HC和金融的发展水平产生了抑制作用,影响了资源配置的效率,导致煤炭产业对全要素生产率的促进作用失效。随着煤炭城市HC和金融部门的完善,煤炭工业的发展促进了全要素生产率的提高。因此,本文认为政府应以提高要素配置效率为目标,制定科学合理的产业调整政策,升级产业结构,积极发展制造业和生产性服务业。同时,在煤炭城市发展过程中,应注重提高HC投入,积极发展绿色金融产业,促进资本市场发展,促进煤炭产业绿色转型。积极开发新能源。煤炭城市的可持续发展应根据不同的生命周期阶段进行指导,以实现健康可持续发展,打破“资源诅咒”。
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引用次数: 0
Sea ice and snow characteristics from year-long transects at the MOSAiC Central Observatory 马赛克中央天文台一年的海冰和雪的特征
IF 3.9 3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00048
P. Itkin, S. Hendricks, M. Webster, Luisa von Albedyll, Stefanie Arndt, D. Divine, Matthias Jaggi, M. Oggier, Ian A. Raphael, R. Ricker, J. Rohde, M. Schneebeli, G. Liston
Repeated transects have become the backbone of spatially distributed ice and snow thickness measurements crucial for understanding of ice mass balance. Here we detail the transects at the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) 2019–2020, which represent the first such measurements collected across an entire season. Compared with similar historical transects, the snow at MOSAiC was thin (mean depths of approximately 0.1–0.3 m), while the sea ice was relatively thick first-year ice (FYI) and second-year ice (SYI). SYI was of two distinct types: relatively thin level ice formed from surfaces with extensive melt pond cover, and relatively thick deformed ice. On level SYI, spatial signatures of refrozen melt ponds remained detectable in January. At the beginning of winter the thinnest ice also had the thinnest snow, with winter growth rates of thin ice (0.33 m month−1 for FYI, 0.24 m month−1 for previously ponded SYI) exceeding that of thick ice (0.2 m month−1). By January, FYI already had a greater modal ice thickness (1.1 m) than previously ponded SYI (0.9 m). By February, modal thickness of all SYI and FYI became indistinguishable at about 1.4 m. The largest modal thicknesses were measured in May at 1.7 m. Transects included deformed ice, where largest volumes of snow accumulated by April. The remaining snow on level ice exhibited typical spatial heterogeneity in the form of snow dunes. Spatial correlation length scales for snow and sea ice ranged from 20 to 40 m or 60 to 90 m, depending on the sampling direction, which suggests that the known anisotropy of snow dunes also manifests in spatial patterns in sea ice thickness. The diverse snow and ice thickness data obtained from the MOSAiC transects represent an invaluable resource for model and remote sensing product development.
重复的样带已经成为空间分布的冰和雪厚度测量的主干,对理解冰的质量平衡至关重要。在这里,我们详细介绍了2019-2020年北极气候研究多学科漂流观测站(MOSAiC)的样条,这是第一次在整个季节收集此类测量数据。与相似的历史样带相比,MOSAiC的积雪较薄(平均深度约为0.1-0.3 m),而海冰相对较厚,第一年冰(FYI)和第二年冰(SYI)。SYI有两种不同的类型:由广泛融化池覆盖的表面形成的相对较薄的水平冰和相对较厚的变形冰。在SYI水平,1月份仍可探测到再冻融池的空间特征。冬初最薄的冰也有最薄的雪,冬季薄冰的生长率(FYI为0.33 m月−1,SYI为0.24 m月−1)超过厚冰(0.2 m月−1)。到1月,FYI的模态冰厚(1.1 m)已经大于之前的SYI (0.9 m)。到2月,SYI和FYI的模态冰厚在1.4 m左右变得无法区分。5月份测得最大模态厚度为1.7 m。断面包括变形的冰,那里的积雪量在4月份最大。水平冰上剩余积雪表现出典型的空间异质性,表现为沙丘形态。根据不同的采样方向,雪和海冰的空间相关长度尺度在20 ~ 40 m或60 ~ 90 m之间,这表明已知的雪沙丘各向异性也表现在海冰厚度的空间格局上。从MOSAiC样带获得的各种冰雪厚度数据为模型和遥感产品开发提供了宝贵的资源。
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引用次数: 7
Milpa ecologies: Transgenerational foodways in Tlaxcala, Mexico Milpa生态:墨西哥特拉斯卡拉的跨代食物方式
3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00099
Keitlyn Alcántara
Through a case study born from archaeological fieldwork in Tlaxcala, Mexico, this article provides an example of place-based foodways that have been used to transmit belief systems and ways of life that resist dominant frameworks of power across time. Foodways, as a site of daily engagements with the full food cycle, can be used to concretize dominant systems of power (e.g., industrial agriculture) but can also be used to build countersystems. Using the example of milpa agriculture and “Maíz Culture,” this case study demonstrates how key ecological philosophies have served as effective and resilient adaptive strategies from which to respond to shifting threats across time—from Aztec and Spanish colonialism to contemporary resistance to neoliberalism. Although agroecology is rooted in indigenous origins, the global adoption of agroecology often focuses heavily on what is planted but fails to center the how—the relationships and values that indigenous ecologies embody. To adopt the planting principles of agroecology without centering indigenous philosophies results in food systems that replicate colonial extraction. While these philosophies are rooted in locally defined practices, they also serve to support a broader unlearning of colonial worldviews within the systems that overshadow the day-to-day experiences of researchers. Using foodways to bridge the time between the archaeological past and agroecological present unmasks normalized worldviews, such as capitalism, neoliberalism, and industrialism to show that, while they are dominant, they are not inevitable nor singular. Please refer to Supplementary Materials, Full text Spanish version of this article, for a full text Spanish version of this article.
通过对墨西哥特拉斯卡拉考古田野调查的一个案例研究,本文提供了一个基于地方的食物方式的例子,这些食物方式被用来传播信仰体系和生活方式,这些信仰体系和生活方式在时间上抵制了主导权力框架。作为与整个食物循环进行日常接触的场所,食物之路可以用来具体化主导的权力系统(例如,工业化农业),但也可以用来建立反系统。本案例研究以米尔帕农业和“Maíz文化”为例,展示了关键的生态哲学如何作为有效和有弹性的适应策略,从阿兹特克和西班牙殖民主义到当代对新自由主义的抵抗,这些策略可以应对不断变化的威胁。尽管生态农业根植于土著起源,但全球对生态农业的采用往往侧重于种植什么,而忽视了如何种植——即土著生态所体现的关系和价值。采用农业生态学的种植原则而不以土著哲学为中心,导致粮食系统复制殖民提取。虽然这些哲学根植于当地定义的实践,但它们也有助于在给研究人员的日常经验蒙上阴影的系统中更广泛地忘记殖民世界观。用食物的方式来连接考古的过去和农业生态的现在,揭示了规范的世界观,如资本主义、新自由主义和工业主义,表明虽然它们占主导地位,但它们不是不可避免的,也不是单一的。请参阅补充资料,本文的西班牙语全文版本,获取本文的西班牙语全文版本。
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引用次数: 0
Toward the next angiosperm revolution: Agroecological food production as a driver for biological diversity 迈向下一次被子植物革命:农业生态食品生产作为生物多样性的驱动力
3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00134
Sara Delaney, Eric J. B. von Wettberg
Flowering plants once drove a global shift in insect–plant–animal relationships and supported an increase in biodiversity, energy flux, and productivity throughout terrestrial ecosystems. We argue here that angiosperms could once again contribute to biodiversity within landscapes, if agroecosystems, and the plants within them, can be managed for multifunctional benefits. The potential for farmland to support biological diversity is understood and well-argued in the literature. We take this long-standing conversation and frame it within a longer evolutionary context, bringing attention to how modification in 2 key areas of our current food production system could support this goal. First, a move toward crop and grazing landscapes that more closely align with regional food webs can lead to observable improvements in community wildlife abundance. Second, we can re-expand the genetic base of our food, fodder, and cover crops, in particular by using crop wild relatives, through the use of wide crosses, genome-assisted selection, and participatory breeding. Agriculture as it is now widely practiced utilizes a narrow sliver of total angiosperm species diversity and within-species genetic diversity on a large amount of land. Change to this status quo requires coordination across tightly interlinked policy areas. It will also require social change. Farmers should be supported to transition through nudges throughout their social network. This necessitates a significant shift in our collective culture to value growing and consuming the flowering crops that can trigger an angiosperm revolution of the Anthropocene.
开花植物曾经推动了全球昆虫-植物-动物关系的转变,并支持了整个陆地生态系统中生物多样性、能量通量和生产力的增加。我们认为,如果农业生态系统和其中的植物能够得到多功能的管理,被子植物可以再次为景观中的生物多样性做出贡献。农田支持生物多样性的潜力在文献中得到了充分的理解和论证。我们把这个长期的对话放在一个更长的进化背景下,关注我们当前粮食生产系统的两个关键领域的修改如何支持这一目标。首先,转向与区域食物网更紧密结合的作物和放牧景观,可以显著改善社区野生动物的丰富程度。其次,我们可以重新扩大我们的食物、饲料和覆盖作物的遗传基础,特别是通过广泛杂交、基因组辅助选择和参与式育种,利用作物的野生近缘种。现在广泛实践的农业利用了整个被子植物物种多样性的一小部分和大量土地上的种内遗传多样性。改变这一现状需要在紧密相连的政策领域之间进行协调。这也需要社会变革。应该支持农民在他们的社会网络中通过推动实现转型。这需要我们集体文化的重大转变,以重视种植和消费开花作物,这可能引发人类世的被子植物革命。
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引用次数: 0
Agroecological transitions in the mind 农业生态转型的思想
IF 3.9 3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00026
Eija Soini Coe, R. Coe
Agroecology has evolved and is promoted as an integrated pathway for the development of food and agriculture systems in ways that address the interacting social, economic, and environmental challenges of current dominant systems. Agroecology is usually described and defined by a set of principles that can be adapted and implemented in ways that are relevant to diverse contexts. Transition to wider use of agroecology depends on farmers and others who are not yet convinced deciding that agroecology provides the right pathway for them. We used 2 human behavioral models to highlight the influence of personal motivational factors such as attitudes and values in transitioning to agroecology. Current sets of agroecology principles generally do not refer to the values, beliefs, motivations, or attitudes that go along with, or are precursors to, change in practices. Insights from research on environmental education and pro-environmental behavior show that such values and attitudes, or mindsets, are built and nurtured through connection with nature, sense of place, group and individual identity, and self- and social efficacy. While recognizing the need for more comprehensive mindset principles for agroecology, we propose, based on our focus on achieving pro-environmental action, that a principle of deliberate building of ecological mindsets be added to the sets of agroecological principles. Transformational learning provides some practical ways of implementing that are well aligned with approaches to learning for agroecology that are already being used.
农业生态学已经发展并作为粮食和农业系统发展的综合途径得到推广,其方式是解决当前占主导地位的系统相互作用的社会、经济和环境挑战。生态农业通常是用一套原则来描述和定义的,这些原则可以根据不同的情况加以调整和实施。向更广泛地使用生态农业的过渡取决于农民和其他尚未被说服的人是否认为生态农业为他们提供了正确的途径。我们使用两个人类行为模型来强调个人动机因素如态度和价值观在向生态农业转型中的影响。目前的生态农业原则一般不涉及伴随实践变化而来或作为实践变化前兆的价值观、信仰、动机或态度。对环境教育和亲环境行为的研究表明,这种价值观和态度或心态是通过与自然的联系、地方感、群体和个人身份、自我和社会效能而建立和培养的。在认识到需要为生态农业制定更全面的心态原则的同时,基于我们对实现亲环境行动的关注,我们建议在生态农业原则的基础上增加一条有意识地建立生态心态的原则。转型学习提供了一些切实可行的实施方法,这些方法与目前正在使用的生态农业学习方法非常吻合。
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引用次数: 1
The inclusiveness of China’s development finance: China’s hybrid approach to aid and poverty reduction in Africa 中国发展融资的包容性:中国对非洲援助与减贫的混合方式
IF 3.9 3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2022.00066
Zhao-yang Wang, Kai Feng
Recent years have seen China emerging as a new donor outside of the West’s club of traditional donors, seeking to fill the financing gap for the Sustainable Development Goals (SDGs). The Chinese government has adopted a hybrid approach to international aid, in which it supplies trade credit and other types of loans to underdeveloped countries through its policy banks and state-owned enterprises in addition to traditional aid. As such a hybrid approach is considered more market-oriented than traditional donors, much of the literature on it has focused on its impact on economic growth rather than on social welfare and poverty reduction. It is critical to note, however, that in reality, the Chinese government has long-valued poverty reduction as a priority of the SDGs, regardless of the context of domestic governance or international aid. Therefore, this article used the panel data of African countries between 2000 and 2016 to test the relationship between China’s development finance and its corresponding poverty-reduction effect in Africa. Empirical results shown that China’s hybrid approach reduced poverty in Africa, particularly in poorer sub-Saharan countries and “heavily indebted poor countries.” Further, in a similar vein to China’s domestic inclusive-growth model, its poverty reduction in Africa tended to be achieved indirectly through production sectors rather than directly through the provision of social relief.
近年来,中国成为西方传统捐助国俱乐部之外的新捐助国,寻求填补可持续发展目标(SDGs)的资金缺口。中国政府对国际援助采取了一种混合的方式,除了传统的援助外,还通过政策性银行和国有企业向欠发达国家提供贸易信贷和其他类型的贷款。由于这种混合方法被认为比传统的捐助者更以市场为导向,因此关于它的许多文献都集中在其对经济增长的影响,而不是对社会福利和减贫的影响。然而,值得注意的是,在现实中,中国政府长期以来一直将减贫视为可持续发展目标的优先事项,无论在国内治理还是国际援助的背景下。因此,本文采用2000 - 2016年非洲国家的面板数据,检验中国发展融资与相应的非洲减贫效果之间的关系。实证结果表明,中国的混合方法减少了非洲的贫困,特别是在较贫穷的撒哈拉以南国家和“重债穷国”。此外,与中国国内的包容性增长模式类似,中国在非洲的减贫往往是通过生产部门间接实现的,而不是通过提供社会救济直接实现的。
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引用次数: 0
Measuring agroecology: Introducing a methodological framework and a community of practice approach 测量农业生态学:介绍方法框架和实践社区方法
3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2023.00042
Nina Isabella Moeller, Matthias Geck, Colin Anderson, Carlos Barahona, Caroline Broudic, Remi Cluset, Gisele Henriques, Fabio Leippert, Dave Mills, Ameen Minhaj, Anja Mueting-van Loon, Stephanie Piers de Raveschoot, Emile Frison
Over the last few years, a small but increasing number of researchers and organizations has been involved in tracking funding flows to agroecology, analyzing development assistance, climate finance, and research funds for their contribution to an agroecological transformation of food systems, including as part of the efforts to achieve the Sustainable Development Goals. This has led to the emergence of a community of practice (CoP) meeting and exchanging in a number of different forums—Financing Agroecology Civil Society CoP, the Agroecology Donor Group, and the Working Group on Financing and Investments of the Coalition for Food Systems Transformation Through Agroecology (Agroecology Coalition). In this article, we report on a process of collaboratively developing a methodological framework, using the High Level Panel of Experts of the Committee on World Food Security 13 principles of agroecology as foundation. This framework overcomes some limitations of previous methodologies for evaluating degrees of agroecological integration (including those using Gliessman’s 5 levels of food system change) and facilitates a robust qualitative assessment of projects, programs, and project portfolios with respect to their “agroecologicalness.” The framework conceives of agroecology as paradigm-shifting rather than as incremental improvements to existing food systems. It enables global comparability as well as local contextualization of each principle. While the need for this framework arose from the desire to monitor—and increase—financial support for an urgently needed transformation toward agroecology, the framework can equally contribute to the design of projects and programs, which aim to radically transform food and farming systems. It also has value as an educational tool, in specifying through statements of value and concrete examples, what agroecological work aims at. This article introduces our framework and argues for an expanded CoP approach to use it widely and share the results through the digital platform that will be developed for that purpose.
在过去几年中,为数不多但数量不断增加的研究人员和组织参与了跟踪生态农业资金流、分析发展援助、气候融资和研究基金对粮食系统农业生态转型的贡献,包括作为实现可持续发展目标努力的一部分。这导致了实践社区(CoP)会议的出现,并在一些不同的论坛上进行了交流——农业生态融资民间社会缔约方会议、生态农业捐助小组和通过农业生态实现粮食系统转型联盟(农业生态联盟)融资和投资工作组。在本文中,我们报告了以世界粮食安全委员会高级别专家小组的13项农业生态学原则为基础,合作制定方法框架的过程。该框架克服了以前评估农业生态一体化程度方法的一些局限性(包括使用Gliessman的粮食系统变化5个级别的方法),并促进了对项目、计划和项目组合的“农业生态性”进行强有力的定性评估。该框架认为农业生态学是一种范式转变,而不是对现有粮食系统的渐进改进。它使每个原则具有全球可比性和本地背景化。虽然需要这一框架是因为希望监测并增加对迫切需要的生态农业转型的财政支持,但该框架同样有助于设计旨在从根本上改变粮食和农业系统的项目和计划。它还具有作为一种教育工具的价值,通过价值陈述和具体实例来说明农业生态工作的目标。本文介绍了我们的框架,并主张扩大缔约方会议方法,以广泛使用该框架,并通过为此目的开发的数字平台分享结果。
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引用次数: 0
Mesquite-associated soil and phyllosphere microbial communities differ across land-use types in drylands 干旱地不同土地利用类型的mesquate相关土壤和层圈微生物群落存在差异
3区 环境科学与生态学 Q1 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1525/elementa.2023.00026
Sydney Cleavenger, Yongjian Chen, Albert Barberán
Plant-associated microbiomes play prominent roles in maintaining plant health and productivity. Here, we characterized the soil and phyllosphere microbiomes associated with mesquite trees in grazing and urban areas compared to natural areas in the arid Southwestern United States. Our results showed that grazing areas were associated with higher phyllosphere fungal richness, while urban areas had higher phyllosphere richness for both fungi and bacteria/archaea, and additionally, urban soils had lower fungal richness. Specifically, grazing areas were characterized by larger proportions of nitrogen-fixing bacteria in the soil and fungal plant pathogens in the phyllosphere, while urban areas presented higher proportions of fungal plant pathogens in both the soil and phyllosphere as well as nitrifying and denitrifying bacteria in the phyllosphere, but a lower proportion of cellulolytic bacteria in the soil. Furthermore, in urban areas, more phyllosphere microorganisms were sourced from the soil. Collectively, these results suggest that plant-associated microbiomes change significantly across land-use types, and these patterns are different between aboveground and belowground parts of plants, as well as between bacteria/archaea and fungi. These changes in plant-associated microbiomes across land-use types might have important implications for nutrient cycling, plant health, and ecosystem restoration.
植物相关微生物组在维持植物健康和生产力方面发挥着重要作用。在这里,我们对放牧和城市地区与美国西南部干旱自然地区的豆科植物相关的土壤和层际微生物群进行了表征。结果表明:放牧区土壤层际真菌丰富度较高,城市土壤层际真菌丰富度和细菌/古细菌丰富度较高,城市土壤层际真菌丰富度较低;其中,牧区土壤固氮细菌和根层真菌植物病原体比例较高,城市土壤和根层真菌植物病原体比例较高,根层硝化和反硝化细菌比例较高,而纤维素分解细菌比例较低。此外,在城市地区,更多的层圈微生物来源于土壤。总的来说,这些结果表明,植物相关微生物组在不同的土地利用类型中发生了显著变化,这些模式在植物的地上和地下部分以及细菌/古细菌和真菌之间都是不同的。不同土地利用类型植物相关微生物组的这些变化可能对养分循环、植物健康和生态系统恢复具有重要意义。
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引用次数: 0
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Elementa-Science of the Anthropocene
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