Study on the Planning of Garden Greening Tree Species in Liuzhou City

By analyzing the application situation of greening tree species in Liuzhou City,this study aimed to put forward several strategies and suggestions for garden tree species planning in Liuzhou City according to relevant theories and principles.

Investigation and Analysis of Main Diseases of Landscape Plants in the Main Urban Area of Lu'an City

To figure out the disease occurrence of landscape plants in the main urban area of Lu'an City,the author investigated the disease occurrence of landscape plants in park green space,residential green space,unit attached green space and main road in the area under administration.The survey results showed that there were 29 species of urban landscape plant diseases,mainly powdery mildew and spot diseases.According to the characteristics of the diseases,the causes and problems of the diseases were analyzed,and the corresponding prevention and control measures were put forward.

Application of Rhododendron Species (Ericaceae) in Green System of Kunming City in Yunnan, China

Species, application frequencies, habitat features and combination modes of Rhododendron species in Kunming City were studied through random sampling in different subareas of Kunming City. The results show that Rhododendron species were widely applied in parks, residential areas and street-side green spaces. Diversified application patterns presented excellent landscape effects, but only a few species were used, for example, Rhododendron pulchrum Sweet., R. hybridum, R. simsii var. simsii, while R. delavayi Franch. and R. simsii var. mesembrinum Rehd. were occasionally found. Landscaping features of Kunming were characterized by domination of Rhododendron species, advantages and problems of Rhododendron species in landscaping of Kunming City were analyzed. It was proposed that introduction and domestication of wild Rhododendron species should be enhanced, rich germplasm resources of Rhododendron species should be fully used, and more indigenous Rhododendron species applied.

Colored-leaf Species Resources and Their Landscaping Application in Guang'an City

By investigating species, characteristics and landscaping application of colored-leaf species in Guang'an City, this paper proposed suggestions for the application of colored-leaf species in the local area.

Determination of Air Pollutant Concentrations in Plant Species in Relation to Pollution Sources

Air quality has been a major health issue in urban areas in recent decades. Human activities release a large number of pollutants into the atmosphere which has a direct impact on plant health and leads to ecosystem degradation. The objective of this study is to contribute to a better evaluation of the impact of the air quality of the city of Togo on biological resources. The determination of pollutants was done on samples of plant species with a strong link with the source of pollution. The determination of Sulfur dioxide (SO2) was done by the ripper method. The determination of carbon and estimation of CO2 and CO by the colorimetric method. The determination of nitrogen was done by the Kjeldhal method. The results showed that at the industrial level the amount of CO2 in Alternanthera repens is high with a value of 53.3911 mg/ml. On the other hand, the quantity of CO in Senna occidentalis is 44.3619 mg/ml. In Pithecellobium dulce, the quantity of SO2 and NO2 are evaluated respectively to 0.1588 mg/ml and 0.3696 mg/ml. Regarding to the dumps, the quantity of CO2 in Newbouldia laevis is very high with a value of 65.8508 mg/ml. On the other hand the amount of CO in Senna occidentalis is 51.6106 mg/ml. The quantity of SO2 in Newbouldia laevis is 0.2101 mg/ml and NO2 in Ocimum canum is 0.2744 mg/ml. At the level of roads, the quantities of CO2 and CO in Eragrostis tenella are very high with values respectively equal to 74.4092 mg/ml and 62.2654 mg/ml. On the other hand, the amount of NO2 in Amaranthus sp is 0.2304 mg/ml and that of SO2 in Eragrostis Tenella is 0.1691 mg/ml. The use of a plant bioindicator sensitive to pollutants, allowed concluding that the air of the city of Lome is polluted. The concentration of carbon dioxide and carbon monoxide is much more evident in return when the health of plant species is threatened.

Understanding the Benefits from Green Areas in Rome: The Role of Evergreen and Deciduous Species in Carbon Dioxide Sequestration Capability

Urban areas are a major source of anthropogenic carbon dioxide (CO2) emissions because of road traffic and local heating with natural gas, oil or coal. Rome is among the largest European cities (129,000 ha) with a large volume of green areas (69.6% of the total Municipality area). The CO2 sequestration (CS) capability for the greenery extending for about 300 km2 inside the area delimited by the Great Ring Road (GRA) in Rome was calculated combining satellite data with CS data measured in the field. Data from Sentinel-2 were collected and the Normalized Difference Vegetation Index (NDVI) was computed on a pixel-base. Three plant classes homogeneous in terms of annual NDVI profile were identified: deciduous trees (DT), evergreen trees (ET) and meadows (M) covering an area of 14,142.027 ha within the GRA, of which M had the highest percentage (48%), followed by DT (27%) and ET (25%). CS ranged from 428,241,492.9 Tons CO2 year-1 (ET) to 263,072,460.6 Tons CO2 year-1 (M). The total CS of the greenery inside the GRA was 1049,490,355.4 Tons CO2 year-1 resulting in an annual economic value of $772,424,901.6/ha. The CO2 sequestration capability of the considered plant classes could be incorporated into the national greenhouse gas emission budget to calculate the contribution of CO2 sequestration to the economy of Rome.

Leshan City——A Pleasure Resort with Cultural Attractions

Located at the fringe of the western plain in Sichuan Province and the confluence of the Minjiang, Qingyijiang and Daduhe Rivers, Leshan is an historic city of major importance to tourism. As one of the earliest towns originally under the jurisdiction of Kai Ming Shi, the king of Shu during the Western Zhou Dynasty (B.C. 1066—

南京明城墙绿带草本层自生植物群落数量分类与排序分析

探索南京明城墙绿带草本层自生植物群落类型及其分布情况,确定影响其群落分布的主要环境因子,旨在为构建南京明城墙沿线绿色生态廊道及加强对于明城墙的保护提供理论依据。以南京明城墙绿带内30个样点为研究对象,基于南京明城墙绿带的野外调查数据,以物种重要值为指标,运用α多样性指数分析草本层自生植物的物种多样性特征,采用平均聚合聚类(UPGMA)和典范对应分析(CCA)进行数量分类与排序,研究南京明城墙绿带草本层自生植物群落组成、分布及其与环境因子的关系。结果表明:1)南京明城墙绿带草本层自生植物的物种多样性指数和均匀度指数均较高,且物种分布较为均匀;2)UPGMA聚类将明城墙绿带草本层自生植物分为棕榈-常春藤婆婆纳+中华薹草+黄鹌菜群落、繁缕+紫堇+诸葛菜+阿拉伯婆婆纳群落、常春藤婆婆纳+野芝麻+繁缕+紫堇群落、鹅观草+野芝麻+诸葛菜+紫堇群落、络石-鹅观草+常春藤婆婆纳+加拿大一枝黄花群落、天葵+繁缕+野芝麻+猪殃殃群落、络石-野芝麻+诸葛菜+南赤瓟群落、蓬蘽+络石-渐尖毛蕨+鹅观草群落、野芝麻+鹅观草+求米草+青绿薹草群落、络石-野芝麻+常春藤婆婆纳+诸葛菜群落、野蔷薇+络石+厚萼凌霄-茜草群落11组类型;3)CCA排序结果显示,影响南京明城墙绿带草本层自生植物群落分布的主要环境因子是郁闭度、枯落物厚度、墙体高度及墙面朝向。

不同植被维护措施对三星堆遗址城墙草本植物群落物种多样性与生物量的影响

为了解三星堆遗址城墙植被分布和恢复现状,本研究以三星堆遗址城墙草本植物群落为重点,评估自然更新、种植、弃耕、灌木去除、修剪五种维护措施对其物种多样性和生物量的影响。结果显示,研究区共记录草本植物40科81属103种,各样地类型均以多年生草本植物为主,重要值较大的科为菊科和禾本科。总体来看,灌木去除样地的Shannon-Wiener多样性指数、Simpson优势度指数、物种丰富度指数和Pielou均匀度指数最高,而种植样地最低;对照样地、弃耕样地、灌木去除样地、修剪样地的4种多样性指数无显著差异。种植样地的地上生物量、地下生物量和总生物量最大,其次是对照样地,弃耕样地最小。所有样地的根分层生物量均随土层深度的增加而减少,在0—20 cm土层中,种植样地的根生物量最大,而修剪样地的根系生物量最低。在20—40 cm土层中,弃耕样地的根系生物量显著高于其余样地(P<0.05),在10—20 cm、40—60 cm土层中,各类型样地的根生物量均无显著差异(P>0.05)。草本植物的地上、地下和总生物量与Shannon-Wiener多样性指数、Simpson优势度指数和Pielou均匀度指数均呈极显著负相关(P<0.01),而与物种丰富度指数相关性不显著(P>0.05)。综上,以自然更新为主并辅以针对性干预措施(如灌木去除和修剪)的原生境保护措施,同时控制地上地下生物量的比例,减缓其根系劈裂、生物风化等破坏作用,促进物种多样性和生物量稳定在最有利于遗址保护展示的范围。

怀化市森林、草原、湿地生态系统外来入侵物种调查结果与防控策略

[目的]本研究旨在调查怀化市森林、草原、湿地生态系统中外来入侵物种的现状,为制定有效的防控策略提供基础数据,以保护该地生态安全和生物安全。[方法]通过对怀化市林草湿外来入侵物种进行全面普查,我们初步摸清了外来物种的入侵现状。普查范围覆盖全市,涉及多种生态类型,包括植物、病原微生物、昆虫、无脊椎动物和脊椎动物等。[结果]普查结果显示,怀化市共发现95种外来入侵物种。其中,植物类外来入侵物种有85种,病原微生物1种,昆虫1种,无脊椎动物2种,以及脊椎动物6种。在这些物种中,有21种属于重点管理外来入侵物种,如松材线虫(Bursaphelenchus xylophilus)和加拿大一枝黄花(Solidago canadensis)等。[结论]基于本次普查结果,我们提出了一系列防控对策,包括强化常态化监测、加强重点管理外来入侵物种的防控、科学治理和修复生态环境、充分利用调查成果、保障防控资金投入以及加强外来入侵物种危害性的宣传等。这些对策的实施将有助于减少外来入侵物种对怀化市生态系统的威胁,维护生态安全和生物安全。

南京明城墙绿带草本层优势自生植物的生态位特征及种间联结关系

探究南京明城墙绿带草本层优势自生植物的环境适应性、种间关系及群落的演替进程,为明城墙绿带草本植被的生态修复及构建明城墙沿线绿色生态廊道提供理论依据。基于群落调查数据,采用生态位理论和种间联结对优势自生植物的资源利用能力及种间关系进行分析。结果表明:1)南京明城墙绿带草本层优势自生植物中重要值和生态位宽度较大的物种为野芝麻(Lamium barbatum)、天葵(Semiaquilegia adoxoides)、繁缕(Stellaria media);优势种对繁缕与紫堇(Corydalis edulis)的生态位重叠值和生态位相似性较高;2)总体关联性检验结果为不显著正联结;3)种间联结性检验表明,南京明城墙绿带草本层优势种的种间联结性较弱,群落处于不稳定的动态演替阶段。应加强对明城墙绿带草本植被的生态修复工作,增强草本植物群落的稳定性。

郑州市野生鸟类资源研究

对2014—2019年河南省郑州市鸟类物种多样性、区系分布及生境状况进行调查研究,共记录到鸟类16目52科304种,包括外来鸟类12目16科40种,其中山地鸟类最多,有197种,河道与水田相似性最大(0.71),共有鸟类78种。东洋界鸟类46种(15.13%),古北界鸟类155种(50.99%),广布种103种(33.88%);留鸟90种(29.61%),夏候鸟59种(19.41%),冬候鸟71种(23.36%),旅鸟84种(27.63%);国家一级重点保护鸟类17种,外来种3种,国家二级重点保护鸟种47种,外来种7种,省级重点保护鸟类21种,CITES鸟类列入附录I的物种有7种,外来种8种,极危(CR)级别鸟类3种,濒危(EN)等级鸟类4种,易危(VU)等级鸟类8种,近危等级鸟类4种,中日协定保护鸟类147种,中澳协定保护鸟类40种。结果表明,郑州市鸟类整体表现南北混杂,显示出由古北界向东洋界过渡而以古北界成分占优势的特征。在生境分析中表现出除雀形目鸟类外,水鸟占比很大,在鸟类保护过程中应加大对水体资源的保护。

成渝地区双城经济圈背景下的乐山融合路径探析

文章探讨了乐山在成渝地区双城经济圈背景下的融合路径,分析了其战略地位、产业优势以及交通基础设施建设的重要性。首先回顾了成渝地区双城经济圈的发展及其对乐山的影响,随后深入研究了乐山的支柱产业集群,并提出了优化产业结构、加强与成渝地区的经济联系和合作的策略。还详细讨论了乐山交通基础设施发展规划和意义,强调了交通建设在促进产业发展和区域一体化中的关键作用。研究指出,通过产业升级和交通网络完善,乐山能够有效促进经济转型,并为成渝地区双城经济圈协同发展作出贡献。

海口市城市公园自生植物多样性研究

自生植物生长适应强,能自然生长繁衍并形成良好的自然景观,是建设节约型园林的重要材料。本研究采用典型样方法对海口市16处城市公园分布的自生植物进行调查,以便全面了解海口市城市公园自生植物的多样性水平,并为节约型园林建设提供依据和参考。研究结果表明:16处城市公园共记录自生植物220种,隶属于59科176属。其中本地种154种,占70.00%;外来种66种,占30.00%;外来入侵种48种,占22.27%。自生植物中以菊科、禾本科和豆科所含种类最丰富,3科共计64属75种,占自生植物总属数和总种数的36.36%和34.09%。自生植物中多年生草本和一年生草本最多,分别为113种(51.36%)和97种(44.09%)。自生植物具有良好的生态适应性和良好的园林应用潜力。在未来的城市园林建设中,应合理的规划和利用,提高乡土植物比例,并根据不同环境营造具有地域特色的自生植物景观。

南昌市珍稀濒危野生植物的物种组成及空间分布特征

在查阅文献资料、标本数据和影像数据的基础上,分析了南昌市珍稀濒危野生植物的物种组成和空间分布,并探讨了南昌市珍稀濒危野生植物的致危原因及合理保护措施。结果表明:南昌市共有珍稀濒危野生植物22科29属36种(含亚种、变种,下同),其中,国家重点保护野生植物29种,受威胁物种25种(极危2种、濒危6种、易危17种)。南昌市大部分珍稀濒危野生植物分布较为狭窄,新建区、安义县和南昌县的植物种类较丰富;物种丰富度总体上呈现以西山山脉为中心,向四周逐渐减少的分布格局。地形异质性、水文复杂性造就了南昌市珍稀濒危野生植物的物种多样性,强烈的人为干扰是南昌市珍稀濒危野生植物数量稀少、分布狭窄、受威胁物种占比高的主要原因。因此,建议尽快开展南昌市珍稀濒危野生植物的野外调查工作,并加强这些物种的保护和宣传力度。

基于Markov-PLUS模型的乐山市土地覆被多情景模拟研究

针对如何通过预测未来土地利用结构的变化,以解决不合理的土地覆被类型造成的人地矛盾逐渐尖锐,以及生态、经济、社会发展失衡等问题,通过马尔可夫-斑块生成土地利用模拟(Markov-patch-generating land use simulation,Markov-PLUS)模型,以2000、2010、2020年乐山市土地覆被数据为基础,模拟2030年在自然惯性发展、生态保护、耕地保护3种不同情景下土地覆被的数量以及空间格局的变化,并对其转化情况进行分析。结果表明,Markov-PLUS模型模拟精度较高,可以较好地预测未来乐山市不同发展情景下土地覆被的数量以及空间格局的变化。土地覆被在3种情景中都有变化,耕地、草地、灌木地以及湿地面积在3种情景中均下降,水体、人造地表面积均上升,林地在生态保护情景下上升,其余2种情景下降。3种发展情景对比发现:生态保护情景下能较好保护乐山市生态环境;耕地保护情景下需要更严格的政策干预来保护耕地。该研究通过模拟预测不同情景下乐山市未来土地覆被变化,从而为该地区土地利用规划提供可能的参考。

郑州市园林绿化树种的含碳率分析

探究郑州市园林绿化乔木树种各器官的含碳率特征,为郑州市园林绿化中造林固碳树种的选择和政策制定提供依据。以悬铃木、杨树、白玉兰、银杏、紫叶李、日本晚樱、山楂、山桃、桂花、女贞、广玉兰、雪松、枇杷、石楠等14种园林绿化树种为研究对象,采用重铬酸钾-外加热法,分别测定每个树种的树干、树枝、树叶、树皮和树根5种器官的含碳率,并分析不同树种的含碳率特征。结果表明:1)14种树种之间各器官碳含量的变化幅度为25.88%~59.15%。2)对于同一树种(以悬铃木为例),各器官之间的变异系数为7.41%~9.36%,相同器官之间的变异系数为0.16%~2.54%。3)对于不同树种,相同器官之间的变异系数为10.44%~19.30%,各器官之间的变异系数为4.73%~22.54%;各器官平均含碳率整体表现为树干>树枝>树皮>树叶>树根,树干的含碳率明显高于其他器官。

长春市绿地珍稀树种多样性和空间分布格局研究

采用分层抽样的方法共设置924块样地,对珍稀树种组成、多样性、空间分布特征、树木维度和健康状况进行了调查分析。结果表明:长春市各类绿地共有国家级和省级珍稀树种11科14属18种16361株,红皮云杉(Picea koraiensis)重要值为15.2%,占明显优势,其次依次为水曲柳(Fraxinus mandshurica)、沙松(Abies holophylla)、刺榆(Hemiptelea davidii)及黄檗(Phellodendron amurense),重要值分别为13.90%、13.33%、11.81%和9.94%。绿地建设时间和用地性质是影响珍稀树种丰富度和多样性的重要因素。公园绿地珍稀树种最丰富,共有16种11154株,分别占总种数和总株数的88.89%和68.17%,其次是附属绿地,有珍稀树种14种4873株,分别占总种数和总株数的77.78%和29.78%。朝阳区珍稀树种最丰富,共有15种9472株,分别占总种数和总株数的83.33%和57.89%,其次是长春新区,共有14种2445株,分别占总种数和总株数的77.78%和14.94%。

仁怀市两栖爬行动物资源调查

为了解仁怀市两栖爬行动物资源现状,运用样线法于2022一2023年在仁怀市内开展了实地调查,共记录到两栖动物1目7科15属19种,爬行动物1目6科14属16种。仁怀市两栖爬行动物区系特征明显,均以古北界东洋界广布种为主;两栖爬行动物分布集中于海拔550~950m之间;濒危等级分析显示,仁怀市两栖动物受威胁种类较少,但爬行动物受威胁种类略多;多样性分析结果显示仁怀市两栖类的F指数高于爬行类,分别为3.76和3.00,G指数略低于爬行类,分别为2.59和2.62;G-F指数分析结果揭示仁怀市两栖爬行动物多为单科单属型;平均动物区系相似性分析结果表明,仁怀市两栖爬行动物区系相似性与宽阔水国家级自然保护区呈周缘关系,与赤水和习水2个国家级自然保护区呈密切关系,这可能与河流对两栖爬行动物具有阻隔或促进交流的作用有关;最后本研究对仁怀市两栖爬行动物保护提出了相应意见。本次调查更进一步掌握了仁怀市两栖爬行动物的资源现状,为开展两栖爬行动物资源保护与研究提供了科学依据。

桂林市訾洲公园植物资源调查研究

为了解桂林市訾州公园植物资源及景观现状,通过实地调查并查阅相关文献资料,对该公园植物组成、优势科、生活型、观赏特性、物种来源等进行分析。结果表明,园内共有维管束植物167种,隶属于74科145属,其中以豆科和禾本科为优势科;植物生活型齐全,乔木和草本占主体且常绿植物数量较多;观赏植物以观花植物为主,占植物总种数的57.5%;乡土植物97种,外来植物70种,占比分别为58.08%、41.92%;园内还有中国特有植物5种,濒危植物9种和国家重点保护植物7种。訾洲公园植物景观与其他构景要素较协调,地域特色鲜明,但仍需丰富藤本植物应用形式、增加观赏植物种类、加强宣传科普教育和采取合理的养护管理办法。以期为訾洲公园及桂林城市公园景观营建和升级改造提供参考。