ecosystem services

生态系统服务
  • 文章类型: Journal Article
    城市发展和农业扩张的压力越来越大,对土地利用和土地覆盖(LULC)动态具有重大影响。特别是在巴基斯坦拉瓦尔品第地区的Murree和KotliSattiantehsel等生态敏感地区。本研究的主要目标是使用ArcGIS中的交叉制表来评估每个LULC类别在三十年(1992-2023年)中的空间变化,以识别LULC的变化,并使用景观碎片化工具(LFTv2.0)对森林进行碎片化分析将森林分为几类,例如补丁,边缘,穿孔,小核心,中等核心,大核心。利用Landsat5和Landsat9卫星的遥感数据,这项研究的重点是各种土地类别的时间动态,包括针叶林(CF),常绿森林(EF),耕地(AR),建设区(BU),贫瘠的土地(BA),水(WA),和草原(GL)。采用支持向量机(SVM)分类器和ArcGIS软件进行图像处理和分类,确保不同土地类型分类的准确性。我们的结果表明,森林面积显着减少,针叶林(CF)从1992年的363.9km2减少到2023年的291.5km2(36.0%),占面积的45.0%,总共减少了72.4km2。同样,常绿森林也显著减少,从1992年的177.9平方公里(22.0%)到2023年的99.8平方公里(12.3%),减少了78.1平方公里。该研究使用景观碎片化工具(LFTv2.0)调查了森林碎片化分析,显示碎片化增加,大型核心森林从1992年占总面积的20.3%减少到2023年的7.2%。此外,斑块森林面积从1992年的2.4%增加到2023年的5.9%,表明明显的碎片化。转换矩阵和Sankey图说明了不同LULC类之间的转换,全面了解土地利用变化的动态及其对生态系统服务的影响。这些发现强调了对强有力的保护战略和有效的土地管理实践的迫切需要。该研究有助于了解巴基斯坦喜马拉雅地区的LULC动态和森林破碎化,面对快速的环境变化,提供对未来土地管理和决策至关重要的见解。
    The increasing pressures of urban development and agricultural expansion have significant implications for land use and land cover (LULC) dynamics, particularly in ecologically sensitive regions like the Murree and Kotli Sattian tehsils of the Rawalpindi district in Pakistan. This study\'s primary objective is to assess spatial variations within each LULC category over three decades (1992-2023) using cross-tabulation in ArcGIS to identify changes in LULC and investigates into forest fragmentation analysis using the Landscape Fragmentation Tool (LFTv2.0) to classify forest into several classes such as patch, edge, perforated, small core, medium core, and large core. Utilizing remote sensing data from Landsat 5 and Landsat 9 satellites, the research focuses on the temporal dynamics in various land classes including Coniferous Forest (CF), Evergreen Forest (EF), Arable Land (AR), Buildup Area (BU), Barren Land (BA), Water (WA), and Grassland (GL). The Support Vector Machine (SVM) classifier and ArcGIS software were employed for image processing and classification, ensuring accuracy in categorizing different land types. Our results indicate a notable reduction in forested areas, with Coniferous Forest (CF) decreasing from 363.9 km2, constituting 45.0 % of the area in 1992, to 291.5 km2 (36.0 %) in 2023, representing a total decrease of 72.4 km2. Similarly, Evergreen Forests have also seen a significant reduction, from 177.9 km2 (22.0 %) in 1992 to 99.8 km2 (12.3 %) in 2023, a decrease of 78.1 km2. The study investigates into forest fragmentation analysis using the Landscape Fragmentation Tool (LFTv2.0), revealing an increase in fragmentation and a decrease in large core forests from 20.3 % of the total area in 1992 to 7.2 % in 2023. Additionally, the patch forest area increased from 2.4 % in 1992 to 5.9 % in 2023, indicating significant fragmentation. Transition matrices and a Sankey diagram illustrate the transitions between different LULC classes, providing a comprehensive view of the dynamics of land-use changes and their implications for ecosystem services. These findings highlight the critical need for robust conservation strategies and effective land management practices. The study contributes to the understanding of LULC dynamics and forest fragmentation in the Himalayan region of Pakistan, offering insights essential for future land management and policymaking in the face of rapid environmental changes.
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  • 文章类型: Journal Article
    近年来,气候智慧型林业(CSF)已成为可持续森林管理的创新方法,旨在增强森林复原力,并平衡面临气候相关威胁的生态系统服务的提供。这项研究首次引入了一种新的综合气候智能指数(ICSF)来评估CSF。方法包括以下步骤:(i)选择和评估CSF指标;(ii)这些指标的权重;(iii)在两个不同时期对地中海森林的CSF进行评估,特别是2005年和2015年。从系统的文献综述中选取了8个指标。层次分析法用于将通过CSF专家利益相关者网络的在线问卷获得的偏好转化为权重,在指标和标准级别(即,适应,缓解,和社会层面)。结果表明,“树种组成”指标,“森林破坏”,和“再生”对脑脊液评估至关重要。2005年和2015年之间的CSF值的比较显示,CSF评级略有增加。ICSF作为CSF的综合指数,涵盖了该概念的所有方面,即适应,缓解,和社会层面(包括生产)。国家规模的分析概述了涉及地中海森林应对气候变化的森林管理的动态。该研究为CSF评估提供了一种切实可行的方法,代表支持森林管理者减轻气候变化负面影响的合适工具。
    In recent years, Climate-Smart Forestry (CSF) has emerged as an innovative approach to sustainable forest management, aiming to enhance forest resilience and to balance the provision of ecosystem services facing climate-related threats. This study introduces for the first time a new composite climate-smart index (ICSF) to assess CSF. The methodological approach comprises the following steps: (i) the selection and evaluation of CSF indicators; (ii) the weighting of these indicators; and (iii) the assessment of CSF for Mediterranean forests in two distinct periods, specifically 2005 and 2015. Eight indicators were selected from a systematic literature review. The Analytic Hierarchy Process was applied to translate the preferences obtained through an online questionnaire from a network of CSF-expert stakeholders into weights, at both indicators and criteria levels (i.e., adaptation, mitigation, and the social dimension). Results reveals that indicators \"tree species composition\", \"forest damage\", and \"regeneration\" are of crucial importance for CSF assessment. The comparison of the CSF value between the years 2005 and 2015, shows a slight increase in CSF ratings. The ICSF serves as a comprehensive index of CSF covering all aspects of that concept, i.e. adaptation, mitigation, and the social dimension (including production). The national-scale analysis provides an overview of the dynamics that involve forest management of Mediterranean forests against climate change. The study offers a practicable method for CSF evaluation with its allover set of indicators, representing a suitable tool for supporting forest managers to mitigate the negative impacts of climate change.
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  • 文章类型: Journal Article
    来自半天然草原的木质纤维素生物质的经济管理现在是整个欧洲的挑战。放弃割草会导致这些生态系统逐渐退化。这项研究调查了化学和生物因素如何影响废弃草原上生物量对沼气生产的适用性。我们在Sudetes山脉(波兰和捷克)采样了30个割草和30个废弃的草地。在割草的草地中,短草药的覆盖率明显更高(p<0.001),而高大草本植物在废弃草原中更为普遍(p<0.01)。特定的沼气产量(SBY,NLkg-1挥发性固体)受到割草和废弃草原生物量中草药百分比增加的负面影响。这是由于草药对生物降解的抑制作用,木质素含量的增加和纤维素的减少。这项研究强调了单个植物物种在评估草地生物量以获取区域沼气产量方面的重要性(ABY,m3ha-1),并为尚未广泛研究的领域提供了新的见解。在割草的草原上,ABY与草种(Arrhenatherumelatius,苦参和羊茅)。在废弃的草原上,ABY与草本物种最相关(Galiumaparine,荨麻和香菇)和草(A.elatius和Elymusrepens)。与废弃草原相比,孟加拉草原具有更高的物种丰富度(p<0.001),但是采样的物种数量与SBY和ABY无关。这项研究通过强调有效利用草地生物量的必要性,为可持续生物经济的发展做出了贡献。这种方法有助于保护半自然生态系统,并促进可再生资源的可持续管理。
    The economic management of lignocellulosic biomass from semi-natural grasslands is now a challenge across Europe. The abandonment of mowing these grasslands leads to the gradual degradation of these ecosystems. This study investigates how chemical and biological factors affect the suitability of biomass from abandoned grasslands for biogas production. We sampled 30 mown and 30 abandoned grassland sites in the Sudetes Mountains (Poland and Czechia). The cover contribution of short herbs was found to be significantly higher in mown grasslands (p < 0.001), while that of tall herbs was more prevalent in abandoned grasslands (p < 0.01). The specific biogas yield (SBY, NL kg-1 volatile solids) is negatively affected by an increased percentage of herbs in the biomass of mown and abandoned grasslands. This is due to the inhibitory effect of herbs on biodegradation, the increase in lignin content and the decrease in cellulose. This study highlights the importance of individual plant species in assessing grassland biomass for area biogas yield (ABY, m3 ha-1) and provides new insights into a field that has not yet been extensively investigated. In mown grasslands, ABY was most positively correlated with grass species (Arrhenatherum elatius, Trisetum flavescens and Festuca pratensis). In abandoned grasslands, the ABY was most correlated with herbaceous species (Galium aparine, Urtica dioica and Chaerophyllum aromaticum) and grasses (A. elatius and Elymus repens). Mown grasslands had significantly higher species richness (p < 0.001) compared to abandoned grasslands, but the number of species sampled did not correlate with SBY and ABY. This study contributes to the development of a sustainable bio-economy by highlighting the need for efficient use of grassland biomass. This approach helps protect semi-natural ecosystems and facilitates sustainable management of renewable resources.
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  • 文章类型: Journal Article
    随着对人类和自然耦合系统(CHANS)中生态系统服务(ES)产生和利用的全方位研究的扩展,许多研究表明,ESs的时空动态受到人类活动的管理和影响。然而,关于空间流动过程中社会和生态因素之间的双向耦合如何影响ESs的研究不足,特别是在跨规模影响方面。人与自然之间的这些双向影响与ESs的利用和转移密切相关,并影响ESs时空模式的感知和管理策略的制定。为了填补这一研究空白,这项研究的重点是黄河流域(YRB),从2000年到2020年,使用网络模型跟踪流域内ES流(ESFs)的空间动态以及生态系统与社会经济系统之间的相互作用。结果突出了局部次盆地和较大区域盆地之间的跨尺度影响和反馈过程:作为淡水ESs的供需比,土壤保持ES,食物ESs在YRB的各个子盆地内增加,更多的剩余ESs在次盆地之间流动。这不仅缓解了整个流域的ES供需空间不匹配,而且增强了流域ESF网络的连通性。随后,ESs反馈向当地社会生态相互作用的级联转移和积累,随着社会经济因素和次盆地内ES产出的能力越来越依赖外部ES流入。这些结果强调了ESFs在YRBCHANS中的关键作用,并暗示了跨区域合作和跨规模管理策略在优化ES供求关系中的重要性。此外,这项研究确定了高度耦合系统固有的潜在风险和挑战。总之,这项工作加深了对ESs空间流动特征及其社会生态相互作用的理解;本研究中使用的分析方法也可应用于大型流域如YRB的研究,甚至更大的区域生态系统。
    As research on the full spectrum of ecosystem service (ES) generation and utilization within coupled human and natural systems (CHANS) has expanded, many studies have shown that the spatiotemporal dynamics of ESs are managed and influenced by human activities. However, there is insufficient research on how ESs are affected by bidirectional coupling between societal and ecological factors during spatial flow, particularly in terms of cross-scale impacts. These bidirectional influences between humans and nature are closely related to the utilization and transfer of ESs and affect the perception of spatiotemporal patterns of ESs and the formulation of management strategies. To fill this research gap, this study focuses on the Yellow River Basin (YRB), using network models to track the spatial dynamics of ES flows (ESFs) and the interactions between ecosystems and socio-economic systems within the basin on an annual scale from 2000 to 2020. The results highlight cross-scale impacts and feedback processes between local subbasins and the larger regional basin: As the supply-demand ratios of freshwater ESs, soil conservation ESs, and food ESs increase within individual subbasins of the YRB, more surplus ESs flow among subbasins. This not only alleviates spatial mismatches in ES supply and demand across the entire basin but also enhances the connectivity of the basin\'s ESF network. Subsequently, the cascading transfer and accumulation of ESs feedback into local socio-ecological interactions, with both socio-economic factors and the capacity for ES output within subbasins becoming increasingly reliant on external ES inflows. These results underscore the crucial role of ESFs within the CHANS of the YRB and imply the importance of cross-regional cooperation and cross-scale management strategies in optimizing ES supply-demand relationships. Furthermore, this study identifies the potential risks and challenges inherent in highly coupled systems. In conclusion, this work deepens the understanding of the spatial flow characteristics of ESs and their socio-ecological interactions; the analytical methods used in this study can also be applied to research on large river basins like the YRB, and even larger regional ecosystems.
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  • 文章类型: Journal Article
    人类驱动的土地利用变化可能导致生态系统服务(ES)的提供和占用不公平的结果。为了更好地解决决策中土地利用变化的股权相关影响,不同土地利用管理方案下土地利用和ES变化的分析应纳入生态和社会信息,并采取分类方法进行ES分析。因为这种方法在文献中仍然很少,我们提出了一种通用的社会生态方法来支持公平的土地利用决策(在过程和结果方面),并将其应用于埃塞俄比亚西南部的案例研究。我们提出了一种六步方法,将情景规划与以公平为中心的方法相结合,ES的分类分析。它在我们研究区域的应用通过识别不同的受益群体,明确了土地利用变化的公平相关效应,值类型,和空间位置。我们建议在其他情况下应用我们的方法,尤其是在全球南部。
    Human-driven land use change can result in unequitable outcomes in the provision and appropriation of ecosystem services (ES). To better address equity-related effects of land use change in decision-making, analyses of land use and ES changes under different land use management alternatives should incorporate ecological and social information and take a disaggregated approach to ES analysis. Because such approaches are still scarce in the literature, we present a generalized social-ecological approach to support equitable land use decision-making (in terms of process and outcomes) and an example of its application to a case study in southwestern Ethiopia. We propose a six-step approach that combines scenario planning with equity-focused, disaggregated analyses of ES. Its application in our study area made equity-related effects of land use change explicit through the recognition of different beneficiary groups, value types, and spatial locations. We recommend the application of our approach in other contexts, especially in the Global South.
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  • 文章类型: Journal Article
    森林提供重要的生态系统服务(ESs),包括减缓气候变化,当地气候调节,生物多样性的栖息地,木材和非木材产品,能源,和娱乐。同时,森林越来越受到气候变化的影响,需要适应未来的环境条件。现行立法,包括欧盟生物多样性战略,欧盟森林战略,和国家法律,旨在保护森林景观,增强ES,使森林适应气候变化,并利用林产品缓解气候变化和生物经济。然而,调和所有这些相互竞争的需求对决策者来说是一项艰巨的任务,森林管理者,保护机构,和其他利益相关者,特别是考虑到与未来气候影响相关的不确定性。这里,我们使用基于过程的生态系统建模和稳健的多标准优化来开发森林管理组合,这些组合在各种气候情景中提供了多个ESs。我们包括严格保护欧洲10%的土地面积的限制,并在每种气候情况下提供稳定的收获水平。优化显示只有有限的选择来改善这些限制条件下的ES供应。因此,管理投资组合的多样性低,这与多功能性的目标相矛盾,并由于缺乏风险分散而使区域面临重大风险。此外,某些地区,尤其是北方的人,将需要优先考虑木材供应,以补偿其他地方减少的收成。这与欧盟土地利用、土地利用的变化和林业在所有成员国增加森林碳汇的目标相冲突,并阻碍了严格保护区的平均分配,引入了一种偏见,即哪些森林生态系统比其他森林生态系统受到更多保护。因此,欧洲层面的协调战略对于有效应对这些挑战至关重要。我们建议实施欧盟生物多样性战略,欧盟森林战略,森林碳汇的目标需要采取补充措施来缓解对森林的矛盾需求。
    Forests provide important ecosystem services (ESs), including climate change mitigation, local climate regulation, habitat for biodiversity, wood and non-wood products, energy, and recreation. Simultaneously, forests are increasingly affected by climate change and need to be adapted to future environmental conditions. Current legislation, including the European Union (EU) Biodiversity Strategy, EU Forest Strategy, and national laws, aims to protect forest landscapes, enhance ESs, adapt forests to climate change, and leverage forest products for climate change mitigation and the bioeconomy. However, reconciling all these competing demands poses a tremendous task for policymakers, forest managers, conservation agencies, and other stakeholders, especially given the uncertainty associated with future climate impacts. Here, we used process-based ecosystem modeling and robust multi-criteria optimization to develop forest management portfolios that provide multiple ESs across a wide range of climate scenarios. We included constraints to strictly protect 10% of Europe\'s land area and to provide stable harvest levels under every climate scenario. The optimization showed only limited options to improve ES provision within these constraints. Consequently, management portfolios suffered from low diversity, which contradicts the goal of multi-functionality and exposes regions to significant risk due to a lack of risk diversification. Additionally, certain regions, especially those in the north, would need to prioritize timber provision to compensate for reduced harvests elsewhere. This conflicts with EU LULUCF targets for increased forest carbon sinks in all member states and prevents an equal distribution of strictly protected areas, introducing a bias as to which forest ecosystems are more protected than others. Thus, coordinated strategies at the European level are imperative to address these challenges effectively. We suggest that the implementation of the EU Biodiversity Strategy, EU Forest Strategy, and targets for forest carbon sinks require complementary measures to alleviate the conflicting demands on forests.
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  • 文章类型: Journal Article
    农林系统承诺提供高的多功能性,可提供现金和生计收益以及其他生态系统服务。由于有限土地上的高劳动强度和生产率,这种土地系统对于热带景观中的小农可能特别有希望。关注马达加斯加,我们在这里描述了该国农林业的历史,并回顾了当前有关农林业成果以及促进和阻碍农林建立和维护的因素的文献。由此,我们讨论了马达加斯加农林业的潜在未来。历史上,今天在农林系统中种植的许多作物最初被引入作为种植作物,主要是在十九世纪。从那以后,人们将这些作物选入混合农林业系统,经常专注于丁香,香草,咖啡,或可可与果树结合使用,对于丁香来说,与牲畜。其他作物也被整合,但股价相对较低。总的来说,马达加斯加出口的27.4%是通常在农林业系统中种植的作物,为至少50万农民提供收入。农林业对生物多样性和生态系统服务的结果通常被研究,显示出优于一年生作物和单一栽培的好处。社会经济成果,包括收益率,很少研究,但是调查结果指出了小农的经济利益以及社区和集体记忆感。然而,研究结果强调,在地理和作物覆盖率方面仍然存在研究差距,也是生态结果。展望未来,我们强调需要克服诸如土地使用权不安全等障碍,实施的财务障碍,和不稳定的价值链,以扩大马达加斯加的农林业,以造福多功能土地系统和人类福祉。
    在线版本包含补充材料,可在10.1007/s10457-024-00975-y获得。
    Agroforestry systems promise a high multifunctionality providing cash and subsistence yields as well as other ecosystem services. Such land systems may be particularly promising for smallholders in tropical landscapes due to high labour intensity and productivity on limited land. Focusing on Madagascar, we here describe the history of agroforestry in the country and review the current literature on agroforestry outcomes as well as factors promoting and hindering agroforest establishment and maintenance. From this, we discuss the potential future of agroforestry in Madagascar. Historically, many crops farmed today in agroforestry systems were originally introduced as plantation crops, mostly in the nineteenth century. Since then, people co-opted these crops into mixed agroforestry systems, often focusing on clove, vanilla, coffee, or cocoa in combination with fruit trees or, for clove, with livestock. Other crops are also integrated, but shares are comparatively low. Overall, 27.4% of Malagasy exports are crops typically farmed in agroforestry systems, providing income for at least 500,000 farmers. Outcomes of agroforestry for biodiversity and ecosystem services are commonly researched, showing benefits over annual crops and monocultures. Social-economic outcomes, including yields, are more scarcely researched, but findings point towards financial benefits for smallholder farmers and a sense of community and collective memory. However, findings emphasize that research gaps remain in terms of geographic and crop coverage, also for ecological outcomes. Looking to the future, we highlight the need to overcome hurdles such as land tenure insecurity, financial barriers to implementation, and unstable value chains to scale agroforestry in Madagascar to the benefit of multifunctional land systems and human wellbeing.
    UNASSIGNED: The online version contains supplementary material available at 10.1007/s10457-024-00975-y.
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  • 文章类型: Journal Article
    面对气候变化和人类活动,提高我们对生态系统服务(ESs)未来动态的了解,为应对复杂的环境挑战提供了至关重要的基础。这对实现可持续发展至关重要,特别是在城市地区。然而,现有的缺乏坚持彻底预测权衡和协同作用的复杂相互作用,以及不同未来场景下的生态系统服务捆绑。本研究采用综合研究框架,了解长株潭城市群(CZTUA)在三种共享社会经济路径和代表性集中路径(SSP-RCP)情景下(即,SSP126、SSP245和SSP585)。我们未来的情景表明,预计到2050年,CZTUA的核心城市地区将以森林和农田为代价扩大。此外,人为的城市化,特别是湘江沿岸的高强度LUCC,显著影响ESs,导致较低的ESs值。ESs之间的权衡效应主要在WY(水产量)和其他ESs之间观察到。以前由WY主导的生态系统服务束(ESB)已经显著过渡到CS(碳储存)-HQ(栖息地质量)束,特别是在CZTUA的城市核心,作为与水资源有关的潜在挑战的早期预警。我们的研究利用最新的气候和土地利用变化预测来评估城市群中的生态系统,并采用基于ESs的分层分区策略,这为决策者提供了可重复的工具来探索生态系统的变化。
    Improving our knowledge of future dynamics of ecosystem services (ESs) in the face of climate change and human activities provides a crucial foundation to navigate complex environmental challenges, which are essential to attaining sustainable development particularly in urban regions. However, an existing dearth persists in thoroughly forecasting the intricate interplay of trade-offs and synergies, as well as ecosystem services bundling under distinct future scenarios. This study adopts an integrated research framework to understand the spatiotemporal dynamics of ESs in the Changsha-Zhuzhou-Xiangtan Urban Agglomeration (CZTUA) under three Shared Socioeconomic Pathway and Representative Concentration Pathway (SSP-RCP) scenarios (i.e., SSP126, SSP245 and SSP585). Our future scenarios suggest that the core urban area of CZTUA is projected to expand at the cost of forests and croplands by 2050. Furthermore, human-induced urbanization, particularly the high-intensity LUCC along the Xiangjiang river, significantly impacts ESs, resulting in lower ESs values. The trade-off effects between ESs are primarily observed between WY (water yield) and other ESs. Ecosystem service bundles (ESB) previously dominated by WY have significantly transitioned to CS (carbon storage)-HQ (habitat quality) bundle, especially in the urban core of CZTUA, which serves as an early warning of potential challenges related to water resources. Our study utilizes the latest climate and land use change predictions to evaluate ecosystems in urban agglomerations, and adopts a layered zoning strategy based on ESs, which provides decision-makers with reproducible tools to explore ecosystem changes.
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  • 文章类型: Journal Article
    淡水昆虫作为生态系统服务提供者非常重要,为供应服务做出贡献,支持服务,和文化服务。牙本质是许多淡水系统中的主要捕食者,成为无鱼生态系统中的顶级捕食者。牙牙提供的一项服务是将物质和能量从水生生态系统输出到陆地生态系统。在这项研究中,我们提供了旨在估计密度的文献综述,生物量,和次生的牙列,并讨论这种昆虫的顺序与陆地生态系统的施肥有关的程度。我们从44篇论文中发现了有关17个牙列科的109个物种的公开数据。Odonata幼虫在淡水系统中丰富,平均密度为240.04±48.01个m-2(±SE)。Lentic栖息地的密度(104.40±55.31个m-2,N=118)比lotic系统(27.12±5.09,N=70)高得多。牙齿的生物量估计值为488.56±134.51mgm-2y-1,在literic和lotic生境中具有相似的值,相当于每年的二级产量3558.02±2146.80mgm-2y-1。最高的生物量是在eshnidae的蜻蜓中发现的,Corduliidae,和Gomphidae家族。现有证据表明,Odonata对从水体到土地的物质出口具有重要的潜在贡献。成年牙酸盐迁移和定居不同类型水体的能力进一步增强了这一点。
    Freshwater insects are highly significant as ecosystem service providers, contributing to provisioning services, supporting services, and cultural services. Odonates are dominant predators in many freshwater systems, becoming top predators in fishless ecosystems. One service that odonates provide is the export of matter and energy from aquatic to terrestrial ecosystems. In this study, we provide a review of the literature aiming to estimate the density, biomass, and secondary production of odonates and discuss to what extent this order of insects is relevant for the fertilization of terrestrial ecosystems. We found published data on 109 species belonging to 17 families of odonates from 44 papers. Odonata larvae are abundant in freshwater systems, with a mean density of 240.04 ± 48.01 individuals m-2 (±SE). Lentic habitats show much higher densities (104.40 ± 55.31 individuals m-2, N = 118) than lotic systems (27.12 ± 5.09, N = 70). The biomass estimations for odonates indicate values of 488.56 ± 134.51 mg m-2 y-1, with similar values in lentic and lotic habitats, which correspond to annual secondary productions of 3558.02 ± 2146.80 mg m-2 y-1. The highest biomass is found in dragonflies of the Aeshnidae, Corduliidae, and Gomphidae families. The available evidence suggests a significant potential contribution of Odonata to the exportation of material from water bodies to land. This is further strengthened by the ability of adult odonates to migrate and to colonize different types of water bodies.
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  • 文章类型: Journal Article
    生态系统服务(ESs)之间的相互作用涉及权衡和协同作用。定量研究土地利用/土地覆盖变化(LULC)和ESs之间的权衡和协同关系,可以精确识别该区域内ESs的质量状态和驱动因素,这对于合理的资源配置和环境保护至关重要。在这项研究中,碳储量(CS)三个ESs的时空变化特征,利用InVEST模型和GIS技术对太湖周边地区的土壤保留(SR)和生境质量(HQ)进行了探索,并根据差异比较确定三者之间的权衡和协同作用。结果表明:(1)研究区的CS和HQ在1990年至2020年期间呈下降轨迹,而SR经历了一定的波动。三个ESs的空间分布在西南部表现出高水平,而在东北部表现出低水平。(2)权衡和协同作用最明显的最敏感区域主要发生在新建设用地区域和西南山区和丘陵地区。在新建设用地区域,在CS和SR之间经常观察到权衡关系,以及总部和SR之间。相反,主要在CS和HQ之间观察到负协同作用。在西南丘陵地带,由于景观格局的变化,HQ和SR表现出更高水平的负协同关系。(3)LULC是ESs时空变化的重要驱动因素,以及研究领域权衡和协同作用的变化,需要从经济方面进行综合研究,社会和气候变化的观点。
    Interactions among ecosystem services (ESs) involve tradeoffs and synergies. Quantitatively studying the trade-off and synergistic relationships between land use/land cover change (LULC) and ESs enables the precise identification of the quality status and driving factors of ESs within the region, which is crucial for rational resource allocation and environmental protection. In this study, the spatial and temporal change characteristics of the three ESs of carbon storage (CS), soil retention (SR) and habitat quality (HQ) are explored by using the InVEST model and GIS technology in the region around Taihu Lake, and the tradeoffs and synergies among the three are determined based on the difference comparison. The results indicate that: (1) The study area has a downward trajectory in CS and HQ from 1990 to 2020, while SR experiences some fluctuations. The spatial distribution of the three ESs exhibits high levels in the southwest and low levels in the northeast. (2) The most sensitive regions where tradeoffs and synergies are most pronounced occur primarily in the newly construction land regions and the southwestern mountainous and hilly areas. In newly construction land regions, there are often tradeoffs relationships observed between CS and SR, as well as between HQ and SR. Conversely, a predominantly negative synergy is mainly observed between CS and HQ. In the southwestern hilly terrain, due to changes in landscape patterns, HQ and SR exhibit higher levels of negative synergistic relationships. (3) LULC is a significant driver of spatial and temporal changes in ESs, as well as changes in tradeoffs and synergies in the study area, necessitating integrated research from economic, social and climate change perspectives.
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