Zy1-02d Satellite Hyperspectral Remote Sensing: Spatial Scaling Analysis and Monitoring of Landscape Wetland Diversity DOI

Siying Cheng,

Weiwei Sun, Xiaodong Yang

et al.

Published: Jan. 1, 2023

Monitoring and assessing wetland diversity is crucial for its accurate preservation. Hyperspectral satellites have been proven effective detailed investigations of plant in large areas. However, it's unclear if spectral can represent landscape or the inversion accuracy changes with spatial scale. In this study, we utilized support vector machine method supervised classification ZY1-02D hyperspectral remote sensing images Yellow River Estuary. Subsequently, indices (community richness, Shannon-Wiener index, Simpson Pielou index) (coefficient variation, convex hull volume, eight vegetation indices) were calculated coastal wetlands. We then used a random forest model to predict based on diversity. Finally, explored scale relationship between The results showed that overall Estuary was 91.53%, Kappa coefficient 0.90. Spectral had best effect maximum 57%, followed by index (56%), community richness (48%), finally (43%). each increased first stabilized scale, reaching stability at plot size 2880×2880 m. study indicate data monitor pattern affected type effects. findings provide new perspective conservation management large-scale

Language: Английский

Terrestrial Environmental Sensitivity Index Mapping (TESIM) of the Coastal Areas of the Niger Delta Region of Nigeria DOI Creative Commons

Vremudia Onyeayana Wekpe

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Aug. 4, 2023

Abstract It can be argued that despite years of research, the true impacts oil spill pollution on environment and human sources livelihoods are yet to completely understood. Tools such as environmental sensitivity index (ESI) mapping provide useful information significantly mitigate or help eliminate known crude pollution, by proactively identifying environmentally sensitive areas. This study adapted analytical hierarchy process (AHP) geographic systems (GIS) based multiple criteria analysis (MCA) approach in objective determination sections NDR coastal areas, combining several competing related evaluation criteria. The AHP was used determine assign relative weights data layers through a pairwise comparison matrix mutually exclusive using Delphi technique, while MCA aggregate into single map. results show over 57% area is one form other. 68% identified areas classified extremely with 11,752.14km 2 , 7.1% less sensitive. classification termed Niger Delta Relative Environmental Sensitivity Index (NDRESI). implication these more has done if very conserved tougher legislations, monitoring education.

Language: Английский

Citations

3
Vegetation restoration potential in China's drylands under water constraint DOI Open Access
Huiqing Lin, Yan Li, Lisheng Song

et al.

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: June 25, 2024

As an essential pathway for nature-based solutions, vegetation restoration can effectively absorb carbon sequestration and mitigate global warming. However, the excessive water consumption by expansion may create potential conflicts between natural ecosystems human systems, even exacerbate local shortages, especially in water-limited dryland regions. By evaluating availability using multiple datasets, this study explored allowable conversion China’s drylands under constraint of availability. We found that additional resources available were 2.7 ± 11 mm (median SD) from 2003 to 2018 but it decreased over period (-1.15 yr-1). 45.0% area had deficits, after considering existing consumption. Under current constraints, gross primary productivity (GPP) could be restored ranged 4% 7% depending on types (7.1% forests, 6.1% grasslands, 4.3% irrigated crops, 5.6% rain-fed crops). In surplus areas, primarily south east drylands, most conversions toward higher-water-consumption allowed occur. deficit west converting all less water-intensive would not compensate regions, suggesting have exceeded water-carrying capacity. Our research highlights importance provides guidance decision-making while ensuring sustainability.

Language: Английский

Citations

0
Using floristic data to shed light on the origin of flora in the poorly studied common cypress habitats of Northern Iran DOI Creative Commons

Tayebeh Amini,

Mohammad Bagher Erfanian, Hamid Ejtehadi

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 31, 2024

Despite the ecological importance, there is a large knowledge gap on different habitat types of Hyrcanian World Heritage. The Common Cypress Habitats (HCCHs), easternmost part habitats in world, are one these types. HCCHs understudied and threatened by variety anthropogenic disturbances. In current study, synthesizing floristic data all HCCHs, we compared species composition to 20 from Hyrcanian, Irano-Turanian, Mediterranean regions. Also, candidate HCCH with highest conservation priority calculating phylogenetic richness HCCHs. ordination analysis results showed that form distinct group three Thus, found have unique composition. geographical distance had weak effect grouping (Procrustes Sum Squares = 0.886 p-value < 0.001). We also detected Golestan National Park which Therefore, this park most value. Our provide new insights into status conclude bioclimatic classifications might be better predictor compositions than biogeographical classifications. Based observation intermediate composition, it necessary reconsider region. findings useful for developing management strategies

Language: Английский

Citations

0
Species richness prediction and priority conservation planning for rare Michelia species in China DOI Creative Commons

Janet S. C. Tang,

Zhi Chen, Xiaojie Yin

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 21, 2024

Abstract Numerous species are at risk of extinction due to habitat degradation caused by human activity and global warming. Using the optimized MaxEnt Marxan models, we investigated relationship between richness various factors predicting rare Michelia based on distribution data natural ecological in China. Additionally, national nature reserves parks were overlaid with priority conservation zones having irreplaceability values ranging from 80 100 identify gaps. The findings indicate that found southern Yunnan Province, which exhibits highest concentration. high expected shrink 0.62×104km2 under future climate scenarios. Northern latitudes higher altitudes offer better habitats for majority species. With intensification change, it is anticipated this migration will exceed 150 km. Priority primarily located southeastern part Tibet Autonomous Region, south-central central Sichuan western Chongqing Municipality, Guizhou northern Guangxi Zhuang Hunan Guangdong eastern parts Jiangxi northwestern Fujian Zhejiang Taiwan southwestern Hainan Province. These account only 0.86% land area China, 6.6×104km2 prioritized not yet designated as or parks. To effectively embody principle 'green mountains golden mountains,' recommend expanding within enhancing measures.

Language: Английский

Citations

0
Phytogeographic Transition Areas Hide Floristic Diversity in Hyper-Arid Environments (Sharaan Natural Reserve, NW-Saudi Arabia) DOI Creative Commons
Mohamed Djamel Mıara, Sami Youssef,

Yassine Fendane

et al.

Diversity, Journal Year: 2024, Volume and Issue: 17(1), P. 30 - 30

Published: Dec. 31, 2024

Phytogeographic transition zones are often considered areas rich in biodiversity due to their ecological and landscape diversity. This study constitutes the first floristic investigation of Sharaan Natural Reserve (SNR) located northwest KSA, which is supposed be a phytogeographic zone its location between central country dominated by Saharo-Arabic flora northern characterized Mediterranean Irano-Turanian affinities. The studies carried out vegetation season from 2022 2024 led identification 166 plant taxa belonging 38 botanical families. SNR Therophytes, while Saharo-Arabian element dominates chorology taxa. comparative analysis compared available literature on published inventories different regions has confirmed affinities reserve, especially with Nefud regions. Among identified plants, 13 were not mentioned 44 consulted references seem more or less exclusive reserve/phytogeographic region. Also, 12 Least Concern according IUCN red list presence Calligonum comosum L’Hér. allows classification natural habitat (dunes) as Critical Habitat PS6 criteria. reports that transitional area significant number (43) (21) mixed dominant species. region contains diverse biogeographical situation protection closure. conservation should strengthened extended other neighboring same biological wealth.

Language: Английский

Citations

0
Endiandra macrocarpa (Lauraceae), a new tree species from south-western China DOI Creative Commons

Dian-yang Zou,

Guan‐Long Cao,

Jinguo Zhang

et al.

PhytoKeys, Journal Year: 2023, Volume and Issue: 224, P. 183 - 192

Published: April 7, 2023

Endiandramacrocarpa, a new species of Endiandra (Lauraceae) from Yunnan Province south-western China, is here described and illustrated, based on morphological evidence. Compared to other occurring in south China the adjacent regions Indochina, this mainly characterised by its much larger ellipsoidal fruits (up 11 × 6 cm), as well glabrous branchlets puberulent inflorescences.

Language: Английский

Citations

0
Zy1-02d Satellite Hyperspectral Remote Sensing: Spatial Scaling Analysis and Monitoring of Landscape Wetland Diversity DOI

Siying Cheng,

Weiwei Sun, Xiaodong Yang

et al.

Published: Jan. 1, 2023

Monitoring and assessing wetland diversity is crucial for its accurate preservation. Hyperspectral satellites have been proven effective detailed investigations of plant in large areas. However, it's unclear if spectral can represent landscape or the inversion accuracy changes with spatial scale. In this study, we utilized support vector machine method supervised classification ZY1-02D hyperspectral remote sensing images Yellow River Estuary. Subsequently, indices (community richness, Shannon-Wiener index, Simpson Pielou index) (coefficient variation, convex hull volume, eight vegetation indices) were calculated coastal wetlands. We then used a random forest model to predict based on diversity. Finally, explored scale relationship between The results showed that overall Estuary was 91.53%, Kappa coefficient 0.90. Spectral had best effect maximum 57%, followed by index (56%), community richness (48%), finally (43%). each increased first stabilized scale, reaching stability at plot size 2880×2880 m. study indicate data monitor pattern affected type effects. findings provide new perspective conservation management large-scale

Language: Английский

Citations

0