Using ZY1-02D satellite hyperspectral remote sensing to monitor landscape diversity and its spatial scaling change in the Yellow River Estuary

International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2024, Volume and Issue: 128, P. 103716 - 103716

Published: Feb. 19, 2024

Monitoring and assessing wetland diversity is crucial for its accurate preservation. Hyperspectral satellites have been proven effective detailed investigations of plant in many places. However, it's unclear whether spectral invert landscape diversity, the inversion accuracy varies with spatial scale. In this study, ZY1-02D hyperspectral remote sensing images Yellow River Estuary were supervised classified by support vector machine. Then, indices (i.e., community richness, Shannon-Wiener index, Simpson Pielou index) coefficient variation, convex hull volume, eight vegetation indices) calculated. A random forest model was used to predict using diversity. The scale relationship between explored lastly. Our results showed that overall classification 91.53 %, a Kappa 0.90. Spectral had best on index (14 ∼ 57 average = 38 %), while intermediate (3 56 30 %) richness (2 48 but lowest 43 16 %). increased first then stabilized increase scales, reaching stability at sampling size 2880 m × m. indicated data can be monitor changes systems. affected type scaling effects. findings provide new perspective conservation management large-scale

Language: Английский

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Five-year carry-over effects in dune slack vegetation response to hydrology

Ecological Indicators, Journal Year: 2025, Volume and Issue: 170, P. 113016 - 113016

Published: Jan. 1, 2025

Language: Английский

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Floristic Diversity of Natural Forest Patches Across Agroclimatic Zones in Northwestern Ethiopian

F1000Research, Journal Year: 2024, Volume and Issue: 13, P. 811 - 811

Published: July 17, 2024

Background Natural forest resources in northwestern Ethiopia are currently under threat, requiring immediate conservation measures and a management strategy. Thus, an understanding of the present floristic diversity status is required. There lack such type studies specific to fragmented patches across environmental factors. Consequently, this study aimed examine existing state these apply sustainable practices. Methods To achieve this, transects with 200 square plots measuring 400 m2 were set up at nine 200m spacing between transects. Vegetation data collected analyzed using R version 4.1. Results Significant variations (p 0.008) found vegetation features along slope, patches, agroclimatic zone. When compared other highland, mid-altitude had highest species (2.48) stocking (2578 trees/ha). The gentle slope has most (2.83). similarity highland habitats was significant (69%). cover also high (abundance: 5-12%). In all examined, tree life forms exceeded shrubs, climbers, herbs. Conclusions According study’s findings, varies considerably different variations. Despite impression entire from outside, interiors open, only huge mature trees covering canopy. This been triggered by deforestation, degradation, inappropriate human grazing operations.

Language: Английский

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Camelid herding may homogenize Andean grassland plant communities

Authorea (Authorea), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 19, 2023

10 The current global decline in biodiversity is a matter of pressing concern, necessitating the 11 conservation diverse ecosystems across various spatial scales. Regions such as 12 tropical Andes face imminent threat biotic homogenization due to intensive 13 livestock grazing, posing significant risk biodiversity. This study focused on 14 sub-humid grasslands northwestern Bolivia, within National Park Apolobamba. 15 We investigate influence environmental factors plant diversity and among 16 communities seven distinct sites. Our research reveals that local diversity, 17 quantified by species richness inverse Simpson index, predominantly shaped 18 soil pH. Notably, more acidic associated with diminished diversity. Furthermore, 19 our findings highlight dissimilarity composition 20 may be linked grazing intensity. suggests intensified 21 have potential homogenize landscape. A concerning 22 implication likelihood becoming dominated acquisitive species, 23 leaving them susceptible impacts climate variability. underlines 24 necessity analyze multiple facets for comprehensive understanding 25 regulating therefore address drivers 26 loss. To mitigate these threats, managers consider adjusting quantities 27 range used grazers, aiming sustain aspects 28 prevent degradation changing world. 29

Language: Английский

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Camelid Herding May Homogenize Andean Grassland Plant Communities

Published: Jan. 1, 2023

The current global decline in biodiversity is a matter of pressing concern, necessitating the conservation diverse ecosystems across various spatial scales. Regions such as tropical Andes face imminent threat biotic homogenization due to intensive livestock grazing, posing significant risk biodiversity. This study focused on sub-humid grasslands northwestern Bolivia, within National Park Apolobamba. We investigate influence environmental factors plant diversity and among communities seven distinct sites. Our research reveals that local diversity, quantified by species richness inverse Simpson index, predominantly shaped soil pH. Notably, more acidic associated with diminished diversity. Furthermore, our findings highlight dissimilarity composition may be linked grazing intensity. suggests intensified have potential homogenize landscape. A concerning implication likelihood becoming dominated acquisitive species, leaving them susceptible impacts climate variability. underlines necessity analyze multiple facets for comprehensive understanding regulating therefore address drivers loss. To mitigate these threats, managers consider adjusting quantities range used grazers, aiming sustain aspects prevent degradation changing world.

Language: Английский

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