Exploring the spatial heterogeneity of ecosystem services and influencing factors on the Qinghai Tibet Plateau

Ecological Indicators, Journal Year: 2023, Volume and Issue: 154, P. 110521 - 110521

Published: June 24, 2023

Identifying the spatial heterogeneity characteristics of ecosystem services (ESs) and their influencing mechanisms is crucial for regional ecological management sustainable development. This study quantified net primary production (NPP), water yield (WY), soil conservation (SC), sand fixation (SF), habitat quality (HQ) total service (TES) on Qinghai Tibet Plateau (QTP), then analyzed spatial–temporal ESs. The geographical detector model (GDM), geographically weighted regression (GWR) model, constraint lines were used to explore effects factors results showed that (1) NPP, WY, SC, HQ TES an increasing trend from 2000 2018, while SF a decreasing trend. SC distribution pattern "high values in southeast low northwest", high located northern QTP southern QTP. (2) NDVI was key factor TES, precipitation dominated mainly influenced by Largest patch index (LPI). (3) In most areas, natural (precipitation, temperature, DEM, slope NDVI) had positive both negative HQ. human (Resident, Road LPI) other There non-monotonic Overall, much stronger influence ESs than factors, interactions among independent effects. this can provide basis protection

Language: Английский

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Habitat heterogeneity determines species richness on small habitat islands in a fragmented landscape

Journal of Biogeography, Journal Year: 2023, Volume and Issue: 50(5), P. 976 - 986

Published: March 13, 2023

Abstract Aim The small‐island effect (SIE), as an exception to the species–area relationship, has received much attention in true island systems. However, prevalence and related patterns of SIE have not been well evaluated habitat Here, we aimed identify existence for islands fragmented landscapes determine key factors influencing species richness on small islands. Location Inner Mongolia Autonomous Region, China. Taxon Vascular plants. Methods Based 78 grassland fragments agro‐pastoral ecotone northern China, used piecewise regression, path analysis null models investigate relationship. We then a multi‐model selection evaluate impacts four (instability, isolation, heterogeneity surrounding productivity) (including specialists generalists) within range SIE. Results found obvious threshold 5.1 ha below which area had no direct indirect effects richness. Small (<5.1 ha) host lower percentage higher generalists. On islands, was positively affected by while negatively instability isolation. Habitat strongest richness, affecting specialist generalist Main Conclusions There is should be considered biodiversity conservation. role determining pattern especially generalists different SIE‐related patterns. Our study highlights importance considering ecological groups improve our understanding habitats.

Language: Английский

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Spatiotemporal differentiation of the ecosystem service value and its coupling relationship with urbanization: A case study of the Lanzhou-Xining urban agglomeration

Ecological Indicators, Journal Year: 2024, Volume and Issue: 160, P. 111932 - 111932

Published: March 1, 2024

Urbanization is a key factor that threatens the stability of ecosystem services (ESs), which are crucial for maintaining ecological security and enhancing human quality life. Gaining insight into spatiotemporal differentiation service value (ESV) its coupling relationship with urbanization issue in promoting sustainable regional development. We employed various algorithms, including improved equivalence method, random forest model, mixed geographically temporally weighted regression coordination degree (CCD) to reveal evolution ESV driving mechanisms Lanzhou-Xining urban agglomeration (LXUA) from 1980 2020. In addition, we explored between combined index (CUI). The results showed following: (1) From 2020, interannual variation first decreased then increased, an increase 230 million yuan/annum 2020 compared 1980. Spatially, exhibits distribution pattern high south low north, west east. (2) Land use intensity (LUI) elevation contributed values exceeding 20% were most important drivers ESV. (3) average CCD CUI transitioned being severely unbalanced (0.19) slightly balanced (0.42). There was negative spatial correlation CUI, each cluster type distributed discretely space. Our study emphasizes areas characterized by robust integrity ESV, LUI constitutes main reason decline findings this can provide scientific basis coordinated development ESVs LXUA other cities.

Language: Английский

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Multi-scenario simulation and evaluation of the impacts of land use change on ecosystem service values in the Chishui River Basin of Guizhou Province, China

Ecological Indicators, Journal Year: 2024, Volume and Issue: 163, P. 112078 - 112078

Published: April 29, 2024

Changes in land-use patterns are the main driving factors of ecosystem service values (ESVs). The quantitative evaluation ESVs is significant for sustainable development ecologically fragile areas. In this study, Chishui River Basin (CRB) China was selected as study region, and an intensity map (IM) used to analyze transformation land use/land cover (LULC). modified equivalent coefficient value method evaluate based on 2000, 2010, 2020 use datasets. spatial temporal distributions ESV its response changes LULC were analyzed using Getis-Ord Gi* statistical Spearman's rank correlation analysis. Moreover, over next 30 years four scenarios simulated Markov-PLUS model. following results obtained: 1) farmland forestland dominant categories, that pattern dramatically changed area; 2) total CRB decreased significantly from 23.21 billion yuan 2000 22.29 2020; 3) ecological conservation scenario promoted ESV, town more conducive urbanization process. Therefore, although showed a decreasing slowly increasing trend context series restoration measures, scientific protection policies must be continuously implemented achieve harmony between improvement development. Our provide important information making decisions facilitating protected basins.

Language: Английский

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Assessing and predicting changes of ecosystem service values in response to land use/land cover dynamics in Ibb City, Yemen: a three-decade analysis and future outlook

International Journal of Digital Earth, Journal Year: 2024, Volume and Issue: 17(1)

Published: March 11, 2024

Assessing ecosystem services values (ESV) within land use/land cover (LULC) changes is crucial for promoting human well-being and sustainable development of regional ecosystems. Yet, the spatial relationship between LULC still unclear in Yemen. This study aimed to assess impacts on ESV Ibb City, over three decades (1990–2020), predict 2050. The hybrid use classification technique classifying Landsat images, CA-Markov model prediction, benefit transfer method (BTM) assessment were employed. Our findings revealed that there was a continuous increase built-up areas barren land, with decrease cultivated grassland, which are predicted continue next 30 years. Consequently, total has decreased from US$ 68.5 × 106 1990 65.2 2020 expected further reduce 61.2 by 2050, reflecting impact urban expansion socio-economic activities ESV. provides insights future monitoring, will contribute formulation effective land-use strategies more services, particularly rapidly urbanizing data-limited regions.

Language: Английский

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The trend of vegetation greening and its drivers in the Agro-pastoral ecotone of northern China, 2000–2020

Ecological Indicators, Journal Year: 2021, Volume and Issue: 129, P. 108004 - 108004

Published: July 21, 2021

Revegetation practices have continued for nearly 20 years in the agro-pastoral ecotone of northern China (AENC), but it still remains unknown how human-induced efforts contributed to vegetation restoration. This study analyzed spatiotemporal dynamics coverage AENC during 2000–2020 terms normalized difference index (NDVI) using MODIS NDVI datasets, projected future trend variations, and was first quantify relative contributions climatic anthropogenic impacts on variations by residual analysis. The results showed that greening recent due pronounced increases at a rate 0.00623 year−1, unsustainable as whole, especially central AENC, where large areas will degrade future. Specifically, jointly determined almost 89% AENC. Human activities, large-scale afforestation, most important driver result role approximately 66% (34% from climate change). Despite significant expansion forest coverage, excessive afforestation had complex unpredictable growth, hence eco-restoraiton is better make recover its natural form. revealed more uptrend than previously understood, highlighted decisive human activities over last years, expected offer understanding information local ecological

Language: Английский

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Small patches are hotspots for biodiversity conservation in fragmented landscapes

Ecological Indicators, Journal Year: 2021, Volume and Issue: 130, P. 108086 - 108086

Published: Aug. 9, 2021

In the past two decades, agro-pastoral ecotone of northern China has experienced dramatic habitat loss and fragmentation, patches remaining grassland have formed. However, it is still unclear how to prioritize biodiversity conservation in this fragmented landscape. Here, we investigated 84 Tabu River Basin, a typical area China. To determine priorities these patches, used new criterion called ecological uniqueness based on beta diversity. We further explored impact local habitat, dispersal process, patch characteristics uniqueness. Our results showed that turnover was dominant component regional diversity (accounting for 81.9%). identified 13 hotspots with high priority due their significant uniqueness, 9 which were small (<5 ha). Local explained more variation than process characteristics, precipitation heterogeneity key influencing factor. also found positive correlation between fractal dimension study suggests are landscape highlight necessary focus shape prioritization.

Language: Английский

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Evolution and determinants of ecosystem services: insights from South China karst

Ecological Indicators, Journal Year: 2021, Volume and Issue: 133, P. 108437 - 108437

Published: Dec. 1, 2021

The South China Karst (SCK), the world's largest contiguous karst region, has undergone severe ecological degradation associated with interaction of fragile natural attributes and human activities. Understanding causes changes in ecosystem services (ES) is essential to prevent control support sustainable development. However, existing studies have not comprehensively explored impact systems activities on ES failed consider their spatiotemporal heterogeneity. Here, we used regression analysis study evolution diverse landscapes (karst non-karst) SCK activity them. Random forest geographically weighted were explore key factors driving forces different landscape ES. results show that from 1982 2018, ES, such as soil conservation (+8.12%), net primary productivity (+21.14%), carbon storage (+0.86%), nitrogen export (−5.89%), phosphorus (−1.46%), improved, mainly due re-greening rewilding, which optimizes structure ecosystem. large-scale afforestation led a decrease water yield (−13.23%). Urban development worsened habitat quality (−0.50%) biodiversity (−1.91%). With intensification activities, region showed lower maintenance capacity than non-karst regions. found varied differing landscapes. Population distribution was biggest threat whereas farming main this region. In these regions, improvement vegetation coverage helpful plant-carbon sequestration, increase precipitation increased yield. Importantly, plays crucial role Nature-based solutions combined proper management strategies can counter help achieve

Language: Английский

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The spatiotemporal change of cropland and its impact on vegetation dynamics in the farming-pastoral ecotone of northern China

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 805, P. 150286 - 150286

Published: Sept. 11, 2021

Due to the unfavorable soil conditions and water resources, cropland use pattern in farming-pastoral ecotone northern China is complex. The program named "Grain for Green" has accelerated change. However, complex retired are challenging monitor with remote sensing due their spatially dispersed easily confused spectrally similar land classes such as nature grasslands non-cropped fields. Taking foot of Yinshan Mountains a case study, we explored classification approach cropland, which was introduced specific class by using multi-temporal Landsat TM OLI images Google Earth Engine. During 1990–2000, increased sharper growth slower from 2001 2010, then decreased significantly 2011 2019, lead area 2019 smaller than an 1990. We analyzed spatiotemporal trajectories Land Use Change Trajectory method evaluate its source. In our finding, approximately 77% labelled before 2019; albeit, not all converted cropland. Moreover, qualitatively assessed vegetation dynamics study utilizing long-term NDVI-mean value reveal that coverage shown continuously increasing trend. It related decline increase at same rate. Our results highlighted had led restoration ecotone. monitoring can improve understanding driving factors consequences these critical change trajectories.

Language: Английский

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Identifying priority conservation areas based on ecosystem services change driven by Natural Forest Protection Project in Qinghai province, China

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 362, P. 132453 - 132453

Published: May 28, 2022

Language: Английский

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