Monitoring changes of NDVI in protected areas of southern California

Gillespie, Thomas W.; Ostermann-Kelm, Stacey; Dong, Chunyu; Willis, Katherine S.; Okin, Gregory S.; MacDonald, Glen M.

doi:10.1016/j.ecolind.2018.01.031

Cited by 81 publications

(45 citation statements)

References 37 publications

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“…The NDVI in the year 2009 presented an increase, reaching 0.56, an oscillation in relation to the median analyzed in 2008, with an increase of 0.15. Liesenberg et al (2007) and Gillespie et al (2018) show that the NDVI and EVI profile is consistent with the seasonal dynamics of the vegetation. Madonsela et al (2018) working with the NDVI in the savanna forest of Southern Africa found 0.49 during the senescence period.…”

Section: Analysis Of Vegetation Indicesmentioning

confidence: 57%

“…Mao et al (2018) observed that this change in the climate leads to losses in the area, the values are minimal and well defined, the variability of the NDVI in the Cerrado is due to the fall of the leaves, causing the decreases of the area reflected by the vegetation (Liesenberg et al, 2007). This decline in vegetation index may be related to the direct impacts reached, mainly by the burn, given by Gillespie et al (2018) in the National Recreation Area of the Santa Monica Mountains.…”

Section: Analysis Of Vegetation Indicesmentioning

confidence: 99%

“…In the years 2007 and 2008 the median was 0.018, thus a decrease in the EVI, when compared to the year 2006, has a difference of 0.003, with a decrease in the index (Figure 2). Goltz et al (2007) state that the Enhanced Vegetation Index (EVI) product is more sensitive to changes in soil cover. Ferreira et al (2006) verified the sensitivity of the EVI and NDVI vegetation indices using the MODIS sensor from the Ecological Park Altamiro de Moura Pacheco, Emas National Park, Brasilia National Park and Chapada dos Veadeiros National Park (State of Goiás) that the sensitivity of the vegetation indices EVI and NDVI using the MODIS sensor comes from the seasonal variations.…”

Section: Analysis Of Vegetation Indicesmentioning

confidence: 99%

“…In the years 2010 and 2011 the median was 0.017, causing a decrease in the EVI of 0.004 when compared with 2009, observing a decrease in the median. Gillespie et al (2018) declined in the index in the Channel Islands (France) due to the regional drought impacts. Ferreira et al (2005) pointed out in the studies in the Cerrado biome, the EVI index with the best performance for the places where there is a greater occurrence of the herbaceous formations, in the years of 2003 and 2004 the median was of 0.023, registering an increase in the EVI of 0.06 compared to 2010 and 2011 years, demonstrating a characterization in natural processes of ecological succession (CONAMA, 1994;Sano et al, 2008).…”

Section: Decreasementioning

confidence: 99%

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Change in Biophysical Parameters from the Creation of a Natural Monument in Mato Grosso

Souza

Danelichen²,

Biudes

et al. 2019

Rev. Bras. Geog. Fis.

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Among the categories of conservation units, the Natural Monument (MoNa) presents a high challenge because it is established areas. MoNa Morro de Santo Antônio is the only one in the state of Mato Grosso and degree of preservation is unknown. Thus, the objective of this work was to evaluate the use and occupation of the soil after the creation of MoNa Morro de Santo Antônio in the state of Mato Grosso and its influence on biophysical parameters from remote sensing techniques. For this, images of the surface reflectance obtained by Landsat 5 and 8 were used. The vegetation classification in the MoNa Morro de Santo Antônio was supervised. The estimated biophysical parameters were the Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI) and the Normalized Difference Moisture Index (NDMI). The results presented in this work show that after the creation of MoNa Morro de Santo Antônio the native Cerrado class increased by 3.38%, the Undergrowth vegetation increased by 5.59% and the Forest dense class increased from 2.21% between 2006 and 2015. The Undergrowth vegetation class had a greater predominance. All indexes were lower in 2006 and higher in 2015. The results of this study are preliminary, but indicate that the creation of MoNa Morro de Santo Antônio in Mato Grosso influenced the preservation of its vegetation.

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Section: Analysis Of Vegetation Indicesmentioning

confidence: 57%

Section: Analysis Of Vegetation Indicesmentioning

confidence: 99%

Section: Analysis Of Vegetation Indicesmentioning

confidence: 99%

Section: Decreasementioning

confidence: 99%

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Change in Biophysical Parameters from the Creation of a Natural Monument in Mato Grosso

Souza

Danelichen²,

Biudes

et al. 2019

Rev. Bras. Geog. Fis.

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“…In this study we focused on the coastal environment of southern California, a region both designated as a biodiversity hotspot (Myers et al 2000, Calsbeek et al 2003, Gillespie et al 2018, and containing the 2nd largest urban agglomeration in the United States. As part of a study on ecological light pollution on the coast of southern California, we quantified the relationship between measures of ALAN derived from satellite-based data and conditions experienced on the ground as assessed from hemispheric photography.…”

Section: Introductionmentioning

confidence: 99%

High correlation but high scale-dependent variance between satellite measured night lights and terrestrial exposure

Simons¹,

Yin²,

Longcore³

2020

Environ. Res. Commun.

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Exposure to artificial light at night (ALAN) is a significant factor in ecological and epidemiological research. Although levels of exposure are frequently estimated from satellite-based measurements of upward radiance, and the correlation between upward radiance and zenith sky brightness is established, the correlation between upward radiance and the biologically relevant exposure to light experienced from all directions on the ground has not been investigated. Because ground-based exposure to ALAN can depend on local glare sources and atmospheric scattering, ecological and epidemiological studies using upward radiance have relied on an untested relationship. To establish the nature of the relationship between upward radiance and hemispherical scalar illuminance (SI) on the ground and to calibrate future experimental studies of ALAN, we used hemispheric digital photography to measure SI at 515 locations in coastal southern California, and compared those values to co-located satellite-based measures of upward radiance as described by the Visible Infrared Imaging Radiometer Suite (VIIRS) satellite's Day-Night Band (DNB) sensor and zenith downwards radiance as estimated by the World Atlas of Artificial Night Sky Brightness (WA). We found significant variations in SI within the geographic scale defined by the resolutions of both the DNB and WA, as well as in both luminance and color correlated temperature (CCT) across individual image hemispheres. We observed up to two or more orders of magnitude in ALAN exposure within any given satellitemeasured unit. Notwithstanding this variation, a linear model of log(SI) (log(SI modeled )), dependent only on the percent of the image hemisphere obscured by structures along the horizon (percent horizon) and log(WA) accounted for 76% of the variation in observed log(SI). DNB does not perform as well in alternative models and consequently future studies seeking to characterize the light environment should be built on WA data when the high temporal resolution of DNB measurements are not needed.

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Assessment of vegetation conservation status in plateau areas based on multi‐view and difference identification

Song

Zhou

2022

Concurrency and Computation

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SummaryVegetation is the center connecting the atmosphere, hydrosphere and biosphere, and it plays an irreplaceable and important role in maintaining the regional ecological balance and affecting the changes of the global ecological environment. Therefore, it is of great practical significance to deeply study the dynamic changes of regional vegetation, predict its future development trend, and comprehensively evaluate its ecological security status. Based on this, this paper combines the multi‐view and difference identification methods to carry out an evaluation study of the vegetation protection status in the plateau area. This paper takes the Huangshui watershed in Qinghai Province as the research area, uses HJ‐1 A star HSI hyperspectral remote sensing images, field measured vegetation canopy spectrum and other auxiliary classification data as data sources, and uses emerging hyperspectral remote sensing technology for analysis. After the above data is preprocessed, spectral data form transformation, hyperspectral data dimensionality reduction and image multi‐view classification feature selection, we use the CART decision tree to classify typical vegetation remote sensing. Finally, we use the landscape ecological security evaluation model to evaluate the vegetation ecological security of the basin. The simulation test verifies the applicability of the scheme in the classification of vegetation hyperspectral remote sensing in complex terrain areas.

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Monitoring changes of NDVI in protected areas of southern California

Cited by 81 publications

References 37 publications

Change in Biophysical Parameters from the Creation of a Natural Monument in Mato Grosso

Change in Biophysical Parameters from the Creation of a Natural Monument in Mato Grosso

High correlation but high scale-dependent variance between satellite measured night lights and terrestrial exposure

Assessment of vegetation conservation status in plateau areas based on multi‐view and difference identification

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