Response of ecosystem service value to land use/cover change in the northern slope economic belt of the Tianshan Mountains, Xinjiang, China

Land use/cover change(LUCC)is becoming more and more frequent and extensive as a result of human activities,and is expected to have a major impact on human welfare by altering ecosystem service value(ESV).In this study,we utilized remote sensing images and statistical data to explore the spatial-temporal changes of land use/cover types and ESV in the northern slope economic belt of the Tianshan Mountains in Xinjiang Uygur Autonomous Region,China from 1975 to 2018.During the study period,LUCC in the study region varied significantly.Except grassland and unused land,all the other land use/cover types(cultivated land,forestland,waterbody,and construction land)increased in areas.From 1975 to 2018,the spatial-temporal variations in ESV were also pronounced.The total ESV decreased by 4.00×10^(8) CNY,which was primarily due to the reductions in the areas of grassland and unused land.Waterbody had a much higher ESV than the other land use/cover types.Ultimately,understanding the impact of LUCC on ESV and the interactions among ESV of different land use/cover types will help improve existing land use policies and provide scientific basis for developing new conservation strategies for ecologically fragile areas.

An analysis of oasis stability in arid areas:a case study in the northern slope areas of the Tianshan Mountains

This paper discusses oasis stability at regional scale with a case study in the northern slope areas of the Tianshan Mountains (NSTM). The results showed certain significant aspects. (1) As long as water resources in the oasis keep stable and their utilization efficiency can be maintained or gradually increased, the primary productivity could be continuously increased and the natural primary productivity keeped relatively stable. In this case, it is considered that the oasis is stable and its sustainable development can be achieved at regional scale. (2) Considering the availability of water resources in the oases, the oases on the alluvial-diluvial fans are highly stable. In the alluvial plain downstream of the groundwater overflowing zones the oases are moderately stable and in the lacustrine deltas or dry lacustrine deltas the oases are lowly stable. (3) Enlargement of oases and the increase of water resources and vegetation coverage in the oasis will certainly enhance the 'cold-island effect' of the oasis and increase the stability of oases.

Temporal and spatial responses of ecological resilience to climate change and human activities in the economic belt on the northern slope of the Tianshan Mountains, China

In the Anthropocene era,human activities have become increasingly complex and diversified.The natural ecosystems need higher ecological resilience to ensure regional sustainable development due to rapid urbanization and industrialization as well as other intensified human activities,especially in arid and semi-arid areas.In the study,we chose the economic belt on the northern slope of the Tianshan Mountains(EBNSTM)in Xinjiang Uygur Autonomous Region of China as a case study.By collecting geographic data and statistical data from 2010 and 2020,we constructed an ecological resilience assessment model based on the ecosystem habitat quality(EHQ),ecosystem landscape stability(ELS),and ecosystem service value(ESV).Further,we analyzed the temporal and spatial variation characteristics of ecological resilience in the EBNSTM from 2010 to 2020 by spatial autocorrelation analysis,and explored its responses to climate change and human activities using the geographically weighted regression(GWR)model.The results showed that the ecological resilience of the EBNSTM was at a low level and increased from 0.2732 to 0.2773 during 2010–2020.The spatial autocorrelation analysis of ecological resilience exhibited a spatial heterogeneity characteristic of"high in the western region and low in the eastern region",and the spatial clustering trend was enhanced during the study period.Desert,Gobi and rapidly urbanized areas showed low level of ecological resilience,and oasis and mountain areas exhibited high level of ecological resilience.Climate factors had an important impact on ecological resilience.Specifically,average annual temperature and annual precipitation were the key climate factors that improved ecological resilience,while average annual evapotranspiration was the main factor that blocked ecological resilience.Among the human activity factors,the distance from the main road showed a negative correlation with ecological resilience.Both night light index and PM2.5 concentration were negatively correlated with ecological resilience in the areas with better ecological conditions,whereas in the areas with poorer ecological conditions,the correlations were positive.The research findings could provide a scientific reference for protecting the ecological environment and promoting the harmony and stability of the human-land relationship in arid and semi-arid areas.

Sustainable land-use patterns for arid lands: A case study in the northern slope areas of the Tianshan Mountains

Sustainable land use patterns are ecological and economic prerequisites of regional sustainable development. This is especially true for arid lands, where the environment is wholly fragile thanks to extremely limited precipitation, and where human activities have greatly transformed natural desert system by clearing natural vegetation, expanding oases and even building dams on inland rivers. However, the current studies on land use patterns are still characterized by field investigations and case studies, with almost no solid scientific basis. This paper holds that land types and their combination patterns are the principal basis for designing sustainable land use patterns, and that GIS and RS-based large-scale land type mapping and the study of their spatial combination structures should be coordinated with the demand of social development. The existing environmental problems induced by irrational land use mostly result from their deviation from the natural properties of land types. Taking the northern slope of the Tianshan Mountains （NSTM） as an example and considering land type patterns as the basis of land use patterns, this paper improves the vertical oa- sis-and-mid-mountain two-belts development model and the sustainable mountain land use model for arid lands put forward in recent years; and in terms of oases patterns, it outlines oasis development models, including intensive land use pattern in alluvial-diluvial fans, moderate agricultural development pattern in alluvial plains, and ecological land use pattern in river-end oases.

Evolution of economic linkage network of the cities and counties on the northern slope of the Tianshan Mountains,China

The exchanges between cities and counties in the northern slope economic belt of Tianshan Mountains(NSEBTM)are increasingly frequent and the economic linkages are increasingly close,but the spatial distribution of economic development and linkages among the cities and counties within NSEBTM is uneven.Therefore,it is of great significance to study the evolution of spatial-temporal pattern of the economic linkage network of cities and counties on NSEBTM to promote the coordinated and integrated development of the regional economy on NSEBTM.In this study,we used the modified gravity model and social network analysis method to analyze the spatio-temporal evolution characteristics of the economic linkage network structure of cities and counties on NSEBTM in 2000,2010,and 2020.The results showed that the comprehensive development quality level of cities and counties on NSEBTM increased from 2000 to 2020,its growth rate also increased,and its gap between cities and counties continued expanding.Both the spatial distribution patterns of the comprehensive development quality level of cities and counties on NSEBTM in 2000 and 2010 were presented as“high in the middle and low at both ends”,while the spatial distribution pattern of 2020 was exhibited as“high value and low value staggered”.The total amount of external economic linkages of cities and counties on NSEBTM showed an obvious upward trend,and its gap between cities and counties continued expanding,presenting a pattern of“a strong middle section and weak ends”.The direction of economic linkages of NSEBTM existed obvious central orientation and geographical proximity.The density of economic linkage network of NSEBTM increased from 2000 to 2020,and the structure of economic linkage network changed from single-core structure centered with Urumqi City to multicore structure centered with Urumqi City,Karamay City,Shihezi City,and Changji City,shifting from unbalanced development to balanced development.In the future,we should accelerate the construction of urban agglomeration on NSEBTM,cultivate a modern Urumqi metropolitan area,improve comprehensive development quality of the cities and counties at the eastern and western ends,strengthen the intensity of economic linkages between cities and counties,optimize the economic linkage network,and promote the coordinated and integrated development of regional economy.

Geochemical Characteristics of Granitoids in the Eastern Sector of the Northern Tianshan Mountains in Xinjiang

The granitioids in question are located in the geosynclinal fold belt of the Northern Tianshan Mountains.The magmas are intruded into a Carboniferous marine volcanic-sedimentary rock series. forming a contempo-raneous. intermediate-basic to acid. composite intrusion. With a whole-rock Rb-Sr isochron age of 315.7 Ma. itis considered to be of middle Heicynian age. The granitoids have a SiO_2 content of 48-78%, a calc-alkali indexof 60 and silica-alkali indices ρ=2.2-2.4 and σ=1.5-2. From basic to acid compositions, the total REE con-tent increases from 38 to 143 ppm. δEu ranges from 0.47 to 0.86 and the Eu anomalies are negative. Thenormalized curves of REE of various rock types are very similar. These coupled with the characteristics of traceelement geochemistry show that the intrusion is an island arc-continental margin, calc-alkaline one. Theδ^(18)O values range from 5.8 to 8.9‰ and the ^(87)Sr/^(86)Sr initial ratio is 0.705. The materials of the intrusion arecomposed of a mixture of the magmas at the top of the upper mantle and in the lower crust, This indicates thatthe rocks might be consanguineous. differentiated and evolved products and possess the characteristics of Ⅰtype granites.

Fluctuation of Picea timberline and paleoenvironment onthe northern slope of Tian-shan Mountains during the late Holocene

As a good indicator of Holocene climate, the fluctuation of alpine timberline is a synthetical result of impacts of many environmental factors dur-ing geological and historical periods and modern times. As the dominant tree species of mountainous conifer forests on the northern slope of Tianshan Mountains in Xinjiang, the distribution of Picea schrenkiana and its population size are sensitive to climatic change. The typical natural profile of Huashuwozi and the nearby Xiaoxigou archaeologi-cal profile, located in Quanzijie Township, Jimusaer County in Xinjiang, were chosen to analyze and compare the relative high-resolution pollen records, and to measure 14C dating and SEM (scanning elec-tron microscope) microstructure for charcoal frag-ments contained in Xiaoxigou profile’s cultural layers. The results show that in these two profiles, the high percentages of Picea (more than 20% and 35%, re-spectively) appeared in the stratum of the same pe-riod (2000-1300 a BP), which corresponds to the charcoal fragment’s age of Picea schrenkiana con-tained in Xiaoxigou cultural layers. These results convincingly revealed that during the period of 2000-1300 a BP, the timberline for Picea schrenkiana on the northern slope of Tianshan Mountains in Xinjiang declined by about 330m compared with the present.

基于PLUS-InVEST模型的天山北坡生态系统碳储量时空变化与预测

土地利用变化作为影响陆地生态系统碳储量的重要因素,研究两者间的关系对维持区域碳平衡和实现双碳目标具有重要意义。基于第三次新疆综合科学考察背景,分析天山北坡1990年、2000年、2010年、2020年土地利用变化与碳储量的定量关系,结合PLUS和InVEST模型,模拟在历史趋势、水资源保护和经济发展3种情景下2030年区域碳储量的空间格局。结果表明:(1)草地和裸地是天山北坡主要土地覆被类型,1990—2020年耕地、林地、水域、建设用地和湿地面积增加,耕地面积增加最多,其余土地利用类型面积减少,草地减少最多。(2)1990—2020年天山北坡碳储量呈“先升后降”趋势,草地、裸地、耕地和林地间的转化是总碳储量变化的主要成因。(3)3种情景下碳储量均低于2020年水平,经济发展情景减幅最为显著,草地减少、裸地增加是碳损失的主要原因。

基于InVEST模型的天山北坡城市群生境质量时空演化研究

生境质量与土地利用/土地覆被类型为生物多样性所提供栖息地的适宜性有密切关系。探究天山北坡城市群土地利用引发的生境质量变化特征,揭示区域生态系统脆弱性,可为生态服务功能改善及区域生态环境保护提供一定参考。基于2000—2020年天山北坡城市群土地利用数据,采用InVEST模型从时空维度进行生境质量测算,再采用莫兰指数对生境质量空间特征进行分析。结果表明:(1)2000—2020年天山北坡城市群生境质量指数值整体在0.8以上,虽然生境质量为差和较差等级区域面积占研究区总面积的比例较高,但整体向良好和优等级方向发展;(2)天山北坡城市群生境质量由优和良好等级转为差和较差等级区域面积占比为3.75%,而由较差向差等级持续恶化的区域面积占比高达10%;(3)天山北坡城市群生境质量高值区与低值区在空间上均存在较高的正相关特征,即生境质量在空间上呈现高-高集聚和低-低集聚的两极特征,且随着时间推移,这种趋势愈发明显。总体上,研究期间天山北坡城市群生境质量空间变化幅度不大,上升区域上升的主要原因是生态工程的实施改变了区域土地利用/覆被类型,使得生境适宜性增强,而下降区域下降的主要原因是建设用地扩张。因此,建议进一步加大研究区生态保护和生态恢复措施。

天山北坡前山带12种植物对干旱胁迫和复水的生理响应及抗旱性评价

【目的】前山带是天山北坡山地-绿洲-荒漠生态系统的重要组成部分,探讨植物对干旱胁迫的动态生理适应性和抗旱性评价方法,筛选植被恢复的适宜树种,对该区域植被生态恢复具有重要意义。【方法】以新疆天山北坡前山带种植的12种植物为研究对象,观测灌水后土壤水分时空变化,分析干旱和复水对植物光合和抗逆生理指标的影响,采用主成分分析评价12种植物的抗旱能力。【结果】(1)干旱胁迫后,土壤水分散失在0-20 cm层最快,20-40 cm层次之,40-60 cm层最慢,不同植物采用不同策略改变生长情况来适应干旱;(2)干旱胁迫后,叶片净光合速率(P_(n))、气孔导度(G_(s))、蒸腾速率(T_(r))、胞间CO_(2)浓度(C_(i))、PSⅡ潜在活性(F_(v)/F_(o))、PSⅡ最大光化学效率(F_(v)/F_(m))、电子传递速率(ETR)和叶绿素含量降低,而抗逆生理指标超氧化物歧化酶(SOD)活性、脯氨酸含量、丙二醛(MDA)含量及非光化学淬灭系数(qN)升高,复水后各指标都有一定程度的恢复,但均未达到初始水平;(3)主成分分析结果显示,Pn、叶绿素含量、ETR和MDA含量等指标贡献率较大,梭梭、柽柳、刺蔷薇和柠条锦鸡儿抗旱性较强,‘中亚沙棘’、‘新棘5号’、‘新棘1号’和山杏次之,而‘新棘4号’、‘新棘3号’、文冠果和‘新棘2号’较弱。【结论】Pn、叶绿素含量、ETR和MDA含量可作为评价植物适应干旱的重要指标;新疆天山北坡前山带植被生态恢复应优先选择梭梭、柽柳、刺蔷薇及柠条锦鸡儿进行建植。

不同牧压对天山北坡中段山地草甸植物群落特征及植物生活型的影响

【目的】研究天山北坡中段山地草甸植物群落特征在不同牧压条件下的变化,为建立合理放牧利用制度提供理论依据。【方法】通过对庙尔沟乡索尔巴斯陶夏、冬牧场的实际放牧强度和草场植被状况进行调查,选择重度(HG)、中度(MG)、轻度(LG)且具代表性地段的放牧场,设置3个不同牧压监测点,每个监测点设置3个重复。【结果】在不同牧压条件下,植物群落优势种略有差异,群落物种数随着放牧强度的增大而减少。随着牧压增大,禾本科、豆科等优良牧草的重要值下降,而杂类草及醉马草的重要值增大;不同牧压对植被生物量的影响最大,其次是植被的盖度和高度,对频度的影响较小,呈现出植被平均高度、总盖度和生物量随放牧强度增大而降低的趋势;不同放牧时期对山地草甸植被优势种和植物生活型有明显影响,在夏季放牧场中植株矮小、重要值很低的金露梅在冬季放牧场中却株型高大,重要值也极高。【结论】在不同牧压条件下,群落物种组成不同,HG、MG、LG物种数分别为26、22和33种,物种间数目相差明显。重度放牧降低了植物群落的高度、盖度和地上生物量,并增大了杂类草和醉马草的优势。随着放牧强度增大,植物的生活型和重要值发生了改变,这也是植物生长过程中适应环境变化的一种策略。

昆仑山北坡地表水氢氧稳定同位素空间分布特征

氢氧稳定同位素作为示踪剂被广泛用于水文循环过程研究。地表水是水循环的重要组成部分,是区域水汽来源和现代水文过程分析的有效载体。基于新疆第三次科学考察,于2018年8月至2023年8月在昆仑山北坡采集了地表水样本并测量其氢氧稳定同位素数据,同时汇编了区域以往的地表水同位素数据,分析了昆仑山北坡地表水氢氧稳定同位素的空间分布特征。结果表明:(1)昆仑山北坡地表水同位素值呈现出西低东高的空间变化特征,区域地表水线为δ^(2)H=5.98×δ^(18)O-6.86(R^(2)=0.65,n=141)。(2)对比昆仑山北坡地表水和降水氢氧稳定同位素值发现地表水同位素平均值普遍低于加权降水同位素值。(3)昆仑山北坡地表水同位素空间格局受到西风携带的外来水汽和局地再循环水汽共同影响,此外蒸发也会改变区域地表水同位素值。

天山北坡经济带植被覆盖度动态变化研究

为探明天山北坡经济带植被覆盖度时空变化及其原因,本研究基于MODIS13Q1NDVI数据、气象数据、地形数据、人文数据,基于Google Earth Engine(GEE)平台,利用Theil-Sen Median趋势分析、Mann-Kendall显著性检验和稳定性分析方法,探究2000-2020年天山北坡经济带植被覆盖度(FVC)时空变化特征及其影响因子.结果表明:天山北坡经济带的FVC表现为两条平行的高覆盖度带.其中中部地区具有较高的植被覆盖度,而边缘地区的植被覆盖度相对较低.2000~2020年间,天山北坡经济带的FVC在时空上呈轻度变化,约占总变化的70%.植被改善区域主要呈现带状分布,集中在研究区的中部,而植被减少区域主要分布在研究区的南缘.整体上,天山北坡的植被覆盖度呈现出西北至东南的相间分布趋势,并且有逐渐上升的趋势.与东部地区相比,西部地区的植被改善更为明显.2000~2020年间,天山北坡经济带的FVC整体上表现出较高的稳定性和较小的波动,其变异程度介于弱变异和中等变异之间.但是,在克拉玛依市北部、乌鲁木齐市西南部以及研究区南缘的零星地区,FVC存在较强的变异.通过地理探测器模型对天山北坡经济带FVC影响因素的研究表明,人类活动(人口密度、夜间灯光和土地利用类型)是FVC空间分异的主要解释因素.从驱动因素来看,人口密度P值为0.283,对FVC影响最大,夜间灯光P值为0.125,土地利用类型P值为0.179.

1990—2022年天山北坡地区不同开垦年限耕层土壤盐分变化

近年来,随着频繁的土地利用变化和大量耕地的开垦,土壤盐渍化已成为导致天山北坡耕地质量退化、阻碍绿洲农业发展的环境因素。本研究基于翔实的调查数据资料、土壤实测数据和中国土地覆盖数据集(CLCD),比较传统插值模型和随机森林插值模型对耕层土壤(0~30 cm)含盐量插值的优缺点;选取精度最高的定量预测模型对天山北坡地区耕层土壤含盐量定量预测,得到耕层土壤含盐量分布变化特征;以空间换时间,将近30 a新开垦耕地耕层土壤含盐量进行比较,分析开垦年限对土壤含盐量的影响。结果表明:(1)与传统的插值方法相比,随机森林算法能够更准确地预测盐渍化土地的土壤盐分分布情况。(2)天山北坡地区,耕层土壤含盐量存在较大空间异质性,即高海拔地区土体中的盐分会随着径流的淋溶,在低海拔的河流下游尾闾或低洼区靠近沙漠一侧积聚。(3)随着开垦年限的延长,天山北坡地区耕层土壤含盐量总体呈现下降的趋势,且土壤盐渍化程度倾向于聚集在一个中等的水平上,趋向于平衡或“中心化”。本研究增进了对当前耕地盐渍化状况及从原始荒地开垦到耕地后耕层土壤盐分变化历程的理解。这为干旱区备用土地资源的开发、管理和有效利用提供了理论支撑,并为农业的持续发展提供了科学依据。

新疆天山北坡城市群土地覆被数据产品精度评价

土地覆被产品为全球各种地球系统科学应用提供了重要的地表覆被信息,如CLCD30(30 m)、GlobeLand30(30 m,简称Globe30)、GLC_FCS30(30 m)、FROM-GLC10(10 m)、Esri_Land_Cover_2020(10 m,简称Esri10),以及ESAWorldCover2020(10 m,简称ESA10),然而其在局地的精度和适用性如何尚不明确。基于Sentinel-2影像,通过样本精度评价和类别混淆评价对上述6套土地覆被数据产品在天山北坡城市群的精度及误差情况进行了研究和分析,并探讨了误差成因和不同数据产品的适用性。结果表明:(1)6套数据产品中,除Esri10外,其余5套数据产品的类型构成、面积占比相对一致。(2)GLC-FCS30、Globe30、CLCD30、FROM-GLC10、ESA10、Esri10的总体精度分别为0.8080、0.8147、0.7880、0.8531、0.8047、0.4725。(3)从产品适用性来看,GLC_FCS30适用于对耕地、裸地的分析,CLCD30适用于对林地、裸地的分析,FROM-GLC10适用于对草地、水体、冰/雪以及建筑的分析,ESA10适用于对耕地和草地的分析,Esri10适用于对林地、冰/雪以及建筑的分析,Globe30在各类别精度评价结果上更均衡。(4)类别混淆主要是耕地、林地以及草地之间及与其他类别的相互混淆,尤其是在土地覆被复杂的地区,如城市边缘区域。

天山北坡中段放牧草地生态系统功能权衡关系的研究

草地生态系统功能保障着人类的生存发展,是草地畜牧业的重要基础。以天山北坡中段草地为研究对象,设置轻牧(LG),重牧(HG)和禁牧(CK)3种处理,基于野外植被调查和室内分析及高通量测序技术,利用单功能法和平均值法得到草地生产力、土壤碳贮存、土壤养分循环、生物多样性和土壤微生物量5种草地生态系统功能以及生态系统多功能性(EMF),并使用均方根偏差法(RMSE)分析放牧干扰下草地生态系统功能及多功能性之间的权衡关系。结果表明,相较于CK,HG显著降低草地生态系统功能及多功能性(P<0.05)。放牧可以改变生态系统功能之间原有的权衡关系,但土壤养分循环功能与土壤碳贮存功能的权衡关系对放牧响应不敏感。根据多项功能权衡协同分析的结果显示,生态系统功能ERMSD值为LG(E_(RMSD)=0.07)<HG(E_(RMSD)=0.10)<CK(E_(RMSD)=0.12),这意味着在LG处理下的草地生态系统功能间的均衡性和协调性最优。综上,本研究区最适宜放牧强度为LG,有利于最大程度地提高草地生态系统功能间的协同效应。

近60a天山北坡经济带天然径流量时空变化及归因识别

天山北坡经济带地处干旱的亚洲腹地,厘清天然径流量(NR)时空变化及成因对统筹区域发展、维持生态安全至关重要。为此,采用Sen’s斜率估计法、Mann-Kendall趋势检验等分析径流量时空变化,基于Budyko假设的水热耦合平衡方程定量评价降水、潜在蒸散发及下垫面对NR变化的贡献。结果表明:(1)近60a天山北坡经济带NR总体呈显著增加趋势,年变化率0.68mm·a-1。1961—1986年波动较大,1987—2012年波动变小且NR增加明显,2013年后NR显著减少。(2)NR大小与海拔变化在空间上高度叠合,天山北坡经济带西部和南部NR较大,西南部与西北部增长幅度大。(3)NR突变点为1980年与2013年,降水一直是NR变化的主导因素,但下垫面影响不断加大,近60a贡献率从31.5%增至45.5%。(4)2012年前天然径流量主要受降水主导,但不同区域影响不同。2013年,西部、东部与中南部下垫面对径流量的影响已超过降水成为主导因素。研究成果深化了天山北坡经济带NR变化的认识,为天山北坡经济带高质量发展提供科学支撑。

天山北坡城市群人居环境适宜性评价

基于人居环境自然和人文综合要素,构建了人居环境综合适宜性指数(HSCI),以天山北坡城市群为研究区,分析其2022年的空间分异规律。结果表明:(1)天山北坡城市群自然环境的空间适宜性受地形起伏度和温湿指数影响显著,整体为一般适宜区集中连片分布、高度适宜区零星分布在天山北坡山麓地带的绿洲。其中胡杨河市和乌鲁木齐县的自然环境适宜性最好;(2)人文环境的空间适宜性受夜间灯光指数和基础服务指数的影响较大,整体形成以乌鲁木齐市和石河子市为中心的“双核”空间特征,并有向周围递减的趋势;(3)天山北坡城市群人居环境综合适宜性指数最好的地方人口分布最多,充分体现了乌鲁木齐市作为区域极核的地位;(4)人居环境适宜性指数与天山北坡城市群的人口、经济和土地匹配程度不足。高质量和较高质量区土地面积仅占总量的2.62%,经济则占总量的54.69%,人口高达总量的59.06%。说明天山北坡城市群地区人口与经济在适宜性方面具有高度匹配性,但人居适宜性指数较高的土地存在过度集中和利用的情况。

天山北坡绿洲乡村聚落空间基因解析及影响机制研究

空间基因蕴含着聚落与环境互动形成的空间信息,在空间特色传承上有着重要作用。由于新疆天山北坡地区聚落在独特的自然环境中形成了互动演化的聚落空间形态,因此以其为研究对象,通过卫星影像图和三维数据采集其中的12个典型聚落样本,在从自然环境、空间片段形态、聚落形态、路网形态和拓扑连接五方面提取空间基因的基础上,构建聚落空间基因图谱,运用因子分析与聚类分析方法,对聚落进行分类,阐释其背后蕴含的环境-空间互动影响模式,并提出保护与改造建议,以期为不同地区乡村聚落空间基因研究提供借鉴,为聚落类型划分、乡村特色保护与发展提供研究思路。

天山北坡经济带经济韧性与生态韧性的时空耦合

如何平衡经济-生态间的关系,以应对外部扰动和冲击,成为促进区域可持续发展的关键。借鉴韧性理论,构建了生态韧性和经济韧性评价指标体系,基于多源数据,利用耦合协调度模型和核密度方法分析了天山北坡经济带经济韧性与生态韧性的时空耦合特征,并探索了各要素对二者耦合协调度的影响。结果发现:①2000—2020年天山北坡经济带经济韧性总体以中等水平为主,呈现天山北坡“中段>西段>南部>东段”的空间分异特征;②生态韧性则总体处于低水平,呈现“西北高东南低”“低值集聚、高值分散”的空间分布特征;③经济韧性和生态韧性一直处于“失调”状态,但逐渐由轻度失调向濒临失调转变,且西段和中段的耦合协调度高于东段和南部;④经济韧性与生态韧性各要素对耦合协调度的影响存在差异,其中经济潜力韧性和生态系统抵抗力对经济韧性和生态韧性耦合协调关系的阻滞作用最强,经济结构韧性和生态系统恢复力对经济韧性和生态韧性耦合协调关系的推动作用最强。通过时空动态分析和关键影响因素的识别,本研究为可持续发展政策提供了综合视角。平衡这两个方面不仅对该地区当前的稳定至关重要,也是确保其在未来挑战中长期生存的关键所在。