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1.
Armadillos (Dasypodidae: Xenarthra) are the principal group of burrow-excavating mammals in Amazonian forest. Little is known about how the landscape's physical characteristics influence where these organisms choose to construct their burrows. We measured topographic characteristics of armadillo burrow placement and evaluated whether these variables affect overall burrow density. Our study took place on the study sites of the Biological Dynamics of Forest Fragments Project in the central Amazon, Brazil. To determine if armadillos exhibit habitat use preferences in constructing their burrows, we quantified the declination and elevation of available terrain along transect lines on our study sites and compared this with the characteristics of areas containing burrows. We also tested whether topographic variables were related to burrow density. Armadillos preferentially build burrows on low elevation, inclined terrain, and declination was positively related to burrow density. Low, inclined areas correspond to slopes next to stream basins. It may require less effort for armadillos to excavate these areas, while also providing proximity to water. The results of this study indicate that topographic information is important to consider when using burrows to estimate habitat use and density of armadillos in terra-firme forests of the central Amazon.  相似文献   

2.
Conserving animals beyond protected areas is critical because even the largest reserves may be too small to maintain viable populations for many wide-ranging species. Identification of landscape features that will promote persistence of a diverse array of species is a high priority, particularly, for protected areas that reside in regions of otherwise extensive habitat loss. This is the case for Emas National Park, a small but important protected area located in the Brazilian Cerrado, the world's most biologically diverse savanna. Emas Park is a large-mammal global conservation priority area but is too small to protect wide-ranging mammals for the long-term and conserving these populations will depend on the landscape surrounding the park. We employed novel, noninvasive methods to determine the relative importance of resources found within the park, as well as identify landscape features that promote persistence of wide-ranging mammals outside reserve borders. We used scat detection dogs to survey for five large mammals of conservation concern: giant armadillo (Priodontes maximus), giant anteater (Myrmecophaga tridactyla), maned wolf (Chrysocyon brachyurus), jaguar (Panthera onca), and puma (Puma concolor). We estimated resource selection probability functions for each species from 1,572 scat locations and 434 giant armadillo burrow locations. Results indicate that giant armadillos and jaguars are highly selective of natural habitats, which makes both species sensitive to landscape change from agricultural development. Due to the high amount of such development outside of the Emas Park boundary, the park provides rare resource conditions that are particularly important for these two species. We also reveal that both woodland and forest vegetation remnants enable use of the agricultural landscape as a whole for maned wolves, pumas, and giant anteaters. We identify those features and their landscape compositions that should be prioritized for conservation, arguing that a multi-faceted approach is required to protect these species.  相似文献   

3.
中国自然保护地体系分类研究   总被引:11,自引:3,他引:8  
欧阳志云  杜傲  徐卫华 《生态学报》2020,40(20):7207-7215
建设自然保护地体系是为子孙后代保留生物多样性资源与自然遗产最有效的途径。自1956年我国建立第一个自然保护区以来,已建设形成覆盖森林、草地、湿地、海洋、荒漠各类生态系统,珍稀濒危动植物物种和种质资源,自然遗迹和自然景观,以及水源保护等各类自然保护地。但由于缺乏自然保护地体系的顶层设计,各类保护地面临功能区分不清晰、空间重叠、管理成效不高等问题。建设以国家公园为主体的自然保护地体系的部署,为理顺我国保护地体系,明确各类保护地的功能定位提供了难得的机会。在分析我国现有自然保护地类型,并参考国际自然保护地体系分类经验的基础上,探讨了我国保护地体系分类,建议将我国自然保护地分为5大类,第I类为自然保护区,第Ⅱ类为国家公园,第Ⅲ类为自然公园,第Ⅳ类为物种与种质资源保护区,第Ⅴ类为生态功能保护区,并分析了各类自然保护地的功能定位和管理目标,以期为自然保护地体系规划建设提供参考。完善我国自然保护地体系分类,根据各类保护地的特点,创新保护地建设政策与机制,加大政府对自然保护地建设力度的同时,发挥全社会力量建设自然保护地,我国自然保护地建设将大有可为。  相似文献   

4.
谢波  杨广斌  李蔓  李亦秋 《广西植物》2022,42(8):1325-1336
贵州省生态资源丰富,建立国家公园有利于集中规范化管理生态资源。为了分析贵州省国家级自然保护地的空间分布特征,筛选出优势景观资源聚集区作为国家公园候选区,该文借助ArcGis空间分析工具对现有的5类113处保护地进行空间分布特征分析,筛选出国家公园试点候选区并对其进行资源评价。结果表明:(1)贵州省国家级自然保护地总体呈凝聚型分布,重叠度高,将保护地聚集区作为景观优势聚集区划定了8个国家公园试点候选区。(2)通过对聚集区主要代表性资源分析和专家评分得出,分值排在前列的聚集区可以考虑作为国家公园试点区进行推荐,分值最高的赤水-习水区可优先选为国家公园试点区。(3)赤水-习水区资源的国家代表性、适宜性、国有性和社会可行性等,满足设立国家公园优先整合交叉重叠保护地的基本原则,其植物多样性保育价值重大。该研究结果为国家公园的选址提供了新的思路,并为以国家公园为主体的自然保护地体系建立以及国家公园植物多样性保育提供了参考依据。  相似文献   

5.
Fire is an important disturbance agent in Myanmar impacting several ecosystems. In this study, we quantify the factors impacting vegetation fires in protected and non-protected areas of Myanmar. Satellite datasets in conjunction with biophysical and anthropogenic factors were used in a spatial framework to map the causative factors of fires. Specifically, we used the frequency ratio method to assess the contribution of each causative factor to overall fire susceptibility at a 1km scale. Results suggested the mean fire density in non-protected areas was two times higher than the protected areas. Fire-land cover partition analysis suggested dominant fire occurrences in the savannas (protected areas) and woody savannas (non-protected areas). The five major fire causative factors in protected areas in descending order include population density, land cover, tree cover percent, travel time from nearest city and temperature. In contrast, the causative factors in non-protected areas were population density, tree cover percent, travel time from nearest city, temperature and elevation. The fire susceptibility analysis showed distinct spatial patterns with central Myanmar as a hot spot of vegetation fires. Results from propensity score matching suggested that forests within protected areas have 11% less fires than non-protected areas. Overall, our results identify important causative factors of fire useful to address broad scale fire risk concerns at a landscape scale in Myanmar.  相似文献   

6.
We compile over 270 wildlife counts of Kenya''s wildlife populations conducted over the last 30 years to compare trends in national parks and reserves with adjacent ecosystems and country-wide trends. The study shows the importance of discriminating human-induced changes from natural population oscillations related to rainfall and ecological factors. National park and reserve populations have declined sharply over the last 30 years, at a rate similar to non-protected areas and country-wide trends. The protected area losses reflect in part their poor coverage of seasonal ungulate migrations. The losses vary among parks. The largest parks, Tsavo East, Tsavo West and Meru, account for a disproportionate share of the losses due to habitat change and the difficulty of protecting large remote parks. The losses in Kenya''s parks add to growing evidence for wildlife declines inside as well as outside African parks. The losses point to the need to quantify the performance of conservation policies and promote integrated landscape practices that combine parks with private and community-based measures.  相似文献   

7.
Protected areas have been increasingly encroached upon by light pollution. This paper examines whether patch geometry and land development intensities in protected areas affect the light pollution levels in 22 Korean national parks. Light pollution levels were assessed based on mean nighttime radiance of these national parks derived from nighttime satellite images. Total floor areas of buildings in the parks and in a 1 km buffer zone outside the park boundaries were calculated to assess land development intensities both inside and surrounding the parks. Two landscape metrics (patch area and fractal dimension) were measured to assess the patch geometry of the parks. Results show that the mean nighttime radiances in the Korean national parks are significantly affected by total floor areas in the 1 km buffer zone, but not by the total floor area within the park. This suggests that skyglow caused by artificial light in periphery is a major source of light pollution in the Korean national parks. In other words, light pollution can be seen as an ecological edge effect in protected areas where land development is stringently restricted. This conclusion is also supported by significant effects of two patch geometry variables, i.e., light pollution was more severe in a protected area with smaller size and a more complex shape. Based on these findings, it is suggested to make protected areas larger and more simple-shaped to protect biodiversity from light pollution. Managing lights in periphery of protected areas is also suggested.  相似文献   

8.
Terrestrial vertebrates exhibit dynamic, positive interactions that form and dissolve under different circumstances, usually with multiple species as participants. Ecosystem engineers are important facilitators of other species because they cause physical changes in the environment that alter resource availability. Although a species can be associated with more than one partner, facilitators may not be interchangeable if they differ in abundance, behavioral characteristics, or interactions with other factors in ways that condition the outcome of the association. We examined interactions between burrowing owls (Athene cunicularia) and two burrowing mammals, hairy armadillos (Chaetophractus villosus) and plains vizcachas (Lagostomus maximus), and determined whether these ecosystem engineers are interchangeable for owls. We examined reproductive success for owls nesting in these mammal burrows, constructed a logistic regression model to identify habitat characteristics associated with owl nests, and examined the engineering activities of the mammals. Data on reproduction and habitat indicate that armadillos and vizcachas are not interchangeable for owls. Thirty-five percent of the nests in vizcacha burrows produced fledglings; no fledglings were produced from nests outside vizcachas colonies, even though owls nest successfully in armadillo burrows in other parts of Argentina. Vizcachas facilitate burrowing owls by construction of burrows and by producing open understory vegetation through herbivory. In contrast, armadillos do not alter vegetation, and their burrows are suitable for nest sites only when they occur in recently burned areas or areas maintained by anthropogenic disturbance. Our habitat model also suggests that fire plays a key role in maintaining owl populations because fire is the only natural process that reduces shrubs to the level required by owls. Current management practices of eradication of vizcachas and fire suppression in shrublands could have strong negative consequences for burrowing owls.  相似文献   

9.
喀喇昆仑山-喜马拉雅山脉是泛第三极区域的重要组成部分。对中国与阿富汗、巴基斯坦、印度、尼泊尔、不丹和缅甸等6国交界的喀喇昆仑山-喜马拉雅山脉地区生态区和保护地分布开展研究。喀喇昆仑山-喜马拉雅山脉地区总面积902843.76 km2,跨古北界和东洋界两大全球重要的生物地理区域,分布有14个生态区,其中有55处保护地。保护地由国家公园和自然保护区组成,主要分布在东喜马拉雅亚高山针叶林、喜马拉雅亚热带阔叶林和东喜马拉雅阔叶林3个生态区内,面积为159063.30 km2,占喀喇昆仑山-喜马拉雅山脉地区总面积的17.62%。保护地中有41处国家公园,占保护地总数的74.5%;有25处为多国毗邻,占总数的45.45%。保护地的地理集中指数都大于完全平均分布值(37.796),空间分布呈集聚状态;其中自然保护区分布的不均衡度高于国家公园,分布在中国,尼泊尔和印度三国境内。核密度分析显示中尼边境与中印边境区域的保护地分布集中度高。20世纪30年代开始,特别是80年代以来各国建立保护地,目前已经形成全球著名的保护地集群带。对于进一步推进喀喇昆仑山-喜马拉雅山脉地区国家公园跨境合作具有重要意义。  相似文献   

10.
国家公园是我国自然保护地最重要的类型之一, 属于全国主体功能区规划中的禁止开发区域, 纳入全国生态保护红线区域管控范围, 实行最严格保护。对国家公园实行最严格保护具有重要意义, 但在国家公园理论研究和具体管理实践中, 严格保护并未被准确理解。作为一种新型自然保护地类型的国家公园, 其功能定位、保护管理理念和方式区别于其他自然保护地, 对国家公园实行严格保护也要与国家公园这些特殊的功能定位和特别的保护管理理念、管理方式相结合。本文系统分析了国家公园最严格保护的提出背景和过程, 探讨了如何全面准确理解最严格保护及其重要意义, 在此基础上, 提出对国家公园实行最严格保护的实现路径, 包括理顺管理体制、健全法制保障、强化监督管理、强化协同管理、规范特许经营、完善社会参与、加强教育培训等七个方面, 包含实行中央直管、明确央地事权、落实资金保障、完善法律法规、实行综合执法等23项具体策略。  相似文献   

11.
于涵  陈战是 《生物信息学》2018,25(6):96-100
随着国家公园试点工作在全国的进一步推进,包括管理制度在内的各类议题就一直处于探讨之中。英国国家公园因其大量的居民点分布其中而与中国的国家公园试点区有着诸多相似之处,其成熟的建设活动管控制度对中国的国家公园也有着借鉴作用。本文以英格兰地区为对象,对英国国家公园建设活动管控的制度基础、管控程序2方面进行分析。最后在分析中国自然保护地建设管控问题的基础上,提出针对中国国家公园建设活动管控制度的建议。  相似文献   

12.
理清自然保护地的空间关系与分布格局是加强空间管控、整合优化自然保护地体系的基础。以大熊猫国家公园四川片区内的自然保护地为案例,基于ArcGIS空间数据的处理、分析与可视化表达等功能,结合韦恩(Venn)图在空间层面上量化分析了公园范围内各类自然保护地的空间关系,并进一步揭示了不同保护情景下大熊猫(Ailuropoda melanoleuca)的分布格局。研究结果表明:(1)研究区内含有6类自然保护地,占研究区总面积的75.13%,其中40.68%为交叉重叠区域。(2)各类自然保护地皆存在大面积的交叉重叠。自然保护区为研究区面积最大的自然保护地类型,占自然保护地总面积的72.53%,其中45.89%为交叉重叠区域;其他类自然保护地占自然保护地总面积的60.87%,其中66.48%为交叉重叠区域。(3)猫点密度与自然保护地的交叉重叠程度呈现逆向增长趋势,区域的重叠水平越高,猫点密度越低。(4)自然保护地整体非重叠区的猫点密度高于重叠区。自然保护区是整体猫点密度最高的自然保护地类型,其非重叠区密度明显高于重叠区;森林公园非重叠区与水利风景区重叠区呈现较高的猫点密度。(5)与自然保护区交叉重叠的自然保护地中,位于自然保护区的猫点密度远高于其他重叠区。由此可见,大熊猫国家公园四川片区内原有自然保护地体系体量大但空间关系复杂,不同区域间的保护效能既不平衡也不充分。建议将研究区内自然保护区的非重叠区、位于自然保护区的世界遗产地区域、森林公园的非重叠区以及水利风景区的重叠区等作为大熊猫的核心保护区,施行严格保护;将自然保护区的重叠区、世界遗产地的其他区域作为生态保育区,恢复受损退化的大熊猫栖息地及所在的自然生态系统;将其他区域作为一般控制区,在有效维护大熊猫种群及其栖息地的前提下适度开展人为活动。同时,建议对空间重叠和邻近相接的区域开展科学评估,明确自然保护地的唯一属性。另一方面,我们期待健全自然保护地管理体制,统筹自然保护地的空间布局,为以国家公园为主体的自然保护地体系建设"松体制之绑"。  相似文献   

13.
The globally vulnerable Clyomys bishopi, a semi-fossorial and colonial rodent, is apparently limited to cerrado (savannah-like vegetation) physiognomies in S?o Paulo State, Brazil. The aim of the study was to verify whether the presence of C. bishopi is associated to the occurrence of palm trees (Attalea gearensis, Syagrus loefgrenii) and armadillo burrows. Thirty six quadrats were placed in different physiognomies of cerrado vegetation at Itirapina Ecological Station, southeastern Brazil to survey the number of C. bishopi burrows of individuals of palm trees and burrows of armadillos. There was a strong dependence and association between the number of C. bishopi burrows and all measured variables (Contingency tables and Spearman rank correlations). It is suggested that this rodent can be found in great numbers where palm trees are abundant. The use of armadillo burrows possibly makes the movement of the rodents easier inside their own galleries.  相似文献   

14.
国家公园遴选标准的国际经验及对我国的启示   总被引:1,自引:0,他引:1  
杜傲  崔彤  宋天宇  欧阳志云 《生态学报》2020,40(20):7231-7237
建立以国家公园为主体的自然保护地体系,是我国生态文明思想的重大举措。国家公园作为国际普遍认可的自然保护手段,受到世界各国的欢迎。美国、加拿大、德国、南非、日本等国的国家公园建设较早、发展较好,通过分析其国家公园建设经验得出:(1)国家公园是以自然保护为首要目标,并为公众提供享受大自然的场所;(2)其评价对象与标准主要包括,自然景观/自然遗迹、生态系统、生物多样性/重要栖息地、面积/范围、自然区域/自然环境、文化景观等;(3)根据资源条件和目标定位的差异,国外国家公园的选建模式主要有基于生态区划的国家公园建设模式、基于社区共建的国家公园建设模式和基于资源主导的国家公园建设模式。在国际经验研究和分析的基础上,结合我国自然资源状况及国家公园建设需求,提出我国国家公园发展建议:(1)明确国家公园的功能定位和发展目标;(2)制定国家公园评价准则和方法,建立以国家代表性、完整性、原真性为主,包括生态区位重要性、历史文化价值等因素的国家公园评价指标体系;(3)划定面向国家公园规划布局的生态地理分区,在区域内建立国家公园,并与生态系统优先区、生物多样性保护关键区,或代表性自然景观格局相协调。  相似文献   

15.
焦雯珺  刘显洋  何思源  闵庆文 《生态学报》2022,42(14):5825-5837
随着我国自然保护事业进入新时代,以国家公园为主体的自然保护地体系建设思路得以明确,以国家公园为代表的自然保护地监测工作也被赋予了更高的要求。监测在促进国家公园科学规划与管理中发挥着重要作用,国家公园管理目标的实现离不开可靠的监测数据和信息的支撑。我国的国家公园试点由各类型自然保护地整合设立,因此面临不同监测类型之间的整合,存在缺乏统一的监测指标体系、有效的监测数据管理、健全的监测实施机制等问题。在对各类型自然保护地整合优化的基本思路下,基于国外国家公园监测实践与经验,综合考虑我国自然保护地的监测现状和需求,从顶层设计出发,构建了以自然资源清查为基础、以生态监测为核心、以自然与人为干扰监测为辅助、以管理有效性监测为补充并服务管理有效性评价的国家公园综合监测体系。在此基础上,进一步提出由三级监测网络、监测数据管理、管理有效性评价三部分组成的国家公园监测实施机制。在国家公园监测体系构建方面进行了探索与尝试,以期为我国国家公园监测体系以及监测制度的建立提供有益参考。  相似文献   

16.
Here we address the question of whether the presence of the burrowing crabs Chasmagnathus granulatus affects small- and large-scale habitat use by migrant shorebirds. This crab is the dominant species in soft bare sediments and vegetated intertidal areas along the SW Atlantic estuaries (southern Brazil 28°S to the northern Argentinean Patagonia 42°S). They generate very extensive burrow beds in soft bottom intertidal areas. Our information shows that this burrowing crab affects the small-scale habitat use by shorebirds, given that shorebirds never walk through the funnel-shaped entrances of burrows. Given that crab burrow entrances occupy up to 40% of the intertidal area, there is a large decrease of available shorebird habitat in crab beds, restricting their activity to the spaces between the burrows. The southern migratory shorebird Charadrius falklandicus maximize the use of these areas by foraging closer to the burrows than the other bird species. Neotropical migrants, such as Calidris fuscicollis, Pluvialis squatarola and Tringa melanoleuca, used foraging paths that tended to maximize the distance from burrows, especially the distance to larger burrows. A field experiment showed that this was not necessarily due to a decrease in the availability of polychaetes near the crab burrows. A combination of landscape measurements and satellite images showed that crab beds covered up to 40% of the intertidal area of the Mar Chiquita coastal lagoon (37°40′S, Argentina), and nearly 100% of the intertidal area of the Bahia Blanca estuary (38°48′-39°25′S, Argentina). These two estuaries are located along the migratory flyway of Neotropical migratory shorebirds, but the Bahia Blanca estuary (area∼110,000 ha) shows a much lower shorebird diversity than Mar Chiquita (area∼4500 ha). The most common species in Bahia Blanca is the two-banded plover C. falklandicus, the species least affected by crabs at Mar Chiquita and which prefers to use high-density crab areas as foraging sites. The oystercatcher Haematopus palliatus was also most abundant in high-density crab areas, but they used these areas for resting. The abundances of preys varied during the study period and between the crab density areas, indicating that the use of these areas by birds is independent of crab density. However, burrowing crabs affect the depth distribution of polychaete and thus their availability to shorebirds. We suggest that this shorebirds-burrowing organism interaction could be generalized for other intertidal estuarine habitats.  相似文献   

17.
中国大陆自然保护地概况及分类体系构想   总被引:2,自引:0,他引:2  
自1956年我国建立第一个自然保护区以来, 截至2016年底, 我国已建立了约10种类型且数量庞大的自然保护地。随着我国生态文明建设的不断发展,建立以国家公园为主体的自然保护地体系不仅是国家提出的重要任务,也是我国自然保护地未来发展的必然趋势。然而, 由于我国目前各类自然保护地尚无统一的分类体系, 已有的自然保护地之间存在着概念界定不清、分类体系混乱、主导功能模糊、地理空间重叠等诸多问题。这不仅严重阻碍了我国现有自然保护地的优化整合和国家公园体制建设,而且不便于开展国际交流。因此迫切需要明确自然保护地的定义, 建立一套适用于我国且有利于国际交流的自然保护地分类体系。本文在介绍自然保护地的概念与内涵,以及我国10类自然保护地建设和分类体系现状的基础上,重点梳理了我国自然保护地的发展历程, 比较了各类自然保护地的定义、内涵以及主要分类依据,并提出了3种能够涵盖目前各类自然保护地的分类体系构想,它们分别基于IUCN保护区分类系统、保护对象自然属性和管理目标社会属性。希望这些构想能在未来自然保护地分类体系的研究中起到抛砖引玉的作用。  相似文献   

18.
刘海龙 《生物信息学》2019,26(11):64-70
美国州立公园与国家公园相比,更强调满足州内居民就近户外休闲游憩需求的功能,这使得其在美国整体公共户外休闲空间体系中占据特殊的位置。在中国第一次全面地研究了美国州立公园体系的发展、特征及与国家公园体系的关系,特别是以部分州为例研究了美国州立公园的分类、质量评估、可达性与空间分布评估等关键问题。研究认为,州立公园的意义在于既缓解了美国国家公园面临的巨大旅游游憩压力,也满足了大众户外休闲游憩的需求。这值得中国在目前构建国家公园与自然保护地体系的同时予以借鉴。最后基于中国的实际需求与挑战,探讨了在省域/区域层次加强构建地方公园、保护地和游憩地体系建设的必要性与途径。  相似文献   

19.
With only five protected areas dedicated to the conservation of biodiversity (two national parks, one strict nature reserve and two faunal reserves), Guinea has one of the smallest protected area networks in West Africa. As a result, two of the five ecoregions of the country and six of the 14 globally threatened large and medium-sized mammals occurring in Guinea are not found in the national protected area network. To identify areas with high biodiversity that could be included in the national protected area network, we used the Key Biodiversity Areas (KBA) methodology. We devised a scoring system to rank the identified KBAs according to their relative conservation significance. We identified a total of 16 KBAs throughout the country. Their proclamation as protected areas would result in the protection of all ecoregions and all but one of Guinea’s globally threatened large and medium-sized mammals. Twelve of the 16 KBAs have the legal status of classified forest, a status that should facilitate the change into formal biodiversity protected areas (IUCN category I–IV). Our analysis indicates that even if only the two areas with the highest conservation significance score, the Ziama and Diécké forests, become formal protected areas, this would provide protection to both the western Guinean lowland forests, one of the most threatened ecoregions in Africa, and to 11 of the 14 threatened large and medium-sized mammals occurring in Guinea.  相似文献   

20.
青藏高原国家公园群地域功能与结构研究   总被引:3,自引:0,他引:3  
虞虎  钟林生  樊杰 《生态学报》2021,41(3):823-832
青藏高原国家公园群建设是促进青藏高原地区可持续发展的重要模式探索。解析地域功能、建构有序的空间组织模式是其关键科学基础。基于青藏高原科学考察研究队提出的国家公园群建设方案,从地域功能和空间结构上进行了探讨。研究认为青藏高原国家公园群具有生态保育功能、生活保障功能和游憩公益服务功能,并表现为空间异质性、时间变异性、多样复合性和相互依附性4种特性;在层级结构上可以划分为2个跨国国家公园、8个旗舰国家公园和11个一般国家公园,未来可再融入青藏高原其他不同层级的自然保护地;从"群"层面优化单体国家公园的功能定位和整体层面的有机组织,需要在类型结构、层级结构和空间结构上进行综合统筹,建构点域、线域、面域相结合的空间组织模式,形成联系紧密、发展稳定、演化有序的功能有机体,才能够深入推进青藏高原国家公园群建设、生态安全屏障建设和区域绿色发展的三位一体目标实现。  相似文献   

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