EVOLUTION OF CERRADO VEGETAL COVER ON A RIVER ISLAND BASED ON ORBITAL IMAGING DATA

Carvalho, Daniel C. De; Pessoa, Mayara M. De L.; Pereira, Marcos G.; Delgado, Rafael C.

doi:10.1590/1809-4430-Eng.Agric.v36n6p1186-1197/2016

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Scientific Papers, Topography, Photogrammetry and Remote Sensing • Engenharia Agrícola 36 (06) • Nov-Dec 2016 • https://doi.org/10.1590/1809-4430-Eng.Agric.v36n6p1186-1197/2016 copy

EVOLUTION OF CERRADO VEGETAL COVER ON A RIVER ISLAND BASED ON ORBITAL IMAGING DATA

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to assess vegetal cover evolution on a river island within the Ecological Station of (EEP), by remote sensing. For this purpose, Normalized Difference Vegetation Indexes were generated for Landsat 1 (1973) and Landsat 5 (1984, 1990, 2000 and 2011) images. Five landscape units were identified in the field: bare soil, Rough savanna, Typical savanna, Forested savanna and Evergreen dry woods. Only Forested savanna and Evergreen dry woods showed poor spectral splitting, being thus considered as a forestry complex. Changes throughout time have occurred in all units, with decreasing in bare soil areas (-2.56 ha year⁻¹), Rough savanna (-0.66 ha year⁻¹) and Typical savanna (-0.94 ha year⁻¹) and with an increase in the Forested savanna (5.97 ha year⁻¹). Thus, the method used in this study was effective for sorting and assessing plant cover of the landscape units studied over time.

KEY WORDS:
remote sensing; environmental monitoring; vegetation index

Structural parameters	Phytophysiognomy
Structural parameters	Rough savanna	Typical savanna	Forested savanna	Evergreen dry wood
Total base area (m² ha⁻¹)	6.73	21.11	22.11	39.32
Mean individual base area (m² h⁻¹)	0.007	0.009	0.016	0.020
Absolute density (ind. ha⁻¹)	926	2257	1371	1930
Mean diameter (cm)	9.57 ^(DSH)	10.90 ^(DSH)	14.89 ^(DBH)	16.10 ^(DBH)
Mean height (m)	2.55	3.95	7.44	9.34

Date	Satellite/Sensor	Point	Orbit	Spatial resolution (m)
30/JUL/1973	Landsat 1/ MSS	73	235	80
15/JUL/1984	Landsat 5/ TM	73	219	30
18/SEP/1990	Landsat 5/ TM	73	219	30
15/OCT/2000	Landsat 5/ TM	73	219	30
28/SEP/2011	Landsat 5/ TM	73	219	30

Landscape unit	1	2	3	4
1- Bare soil	0
2- Rough savanna	1516.54	0
3- Typical savanna	1854.13	1854.13	0
4- Forested savanna	1987.37	1988.11	1987.34	0
5-Evergreem dry wood	1997.11	1992.98	1997.55	1523.87

Landscape unit	NDVI amplitude		Kappa index
Landscape unit	Minimum	Maximum	Kappa index
Bare soil	-0.056	0.025	0.784
Rough savanna	0.025	0.206	0.699
Typical savanna	0.206	0.424	0.898
Forested savanna	0.424	0.652	0.809^* * Kappa index for Typical savanna and Evergreen dry wood joint as Forest complex.
Evergreen dry wood	0.424	0.652

Landscape unit	1	2	3	3
1- Bare soil	1
2- Rough savanna	0.923^* *, ** Spearman correlation significant at 1% and at 5% respectively.	1
3- Typical savanna	0.652	0.564	1
4- Forest complex	-0.823^* *, ** Spearman correlation significant at 1% and at 5% respectively.	-0.782^* *, ** Spearman correlation significant at 1% and at 5% respectively.	-0.857	1
NDVI	-0.747^ , *** Spearman correlation significant at 1% and at 5% respectively.	-0.680^ , *** Spearman correlation significant at 1% and at 5% respectively.	-0.596	0.827^* *, ** Spearman correlation significant at 1% and at 5% respectively.

Associação Brasileira de Engenharia Agrícola SBEA - Associação Brasileira de Engenharia Agrícola, Departamento de Engenharia e Ciências Exatas FCAV/UNESP, Prof. Paulo Donato Castellane, km 5, 14884.900 | Jaboticabal - SP, Tel./Fax: +55 16 3209 7619 - Jaboticabal - SP - Brazil
E-mail: revistasbea@sbea.org.br

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[1] * Corresponding author. Universidade Federal Rural do Rio de Janeiro/ Rio de Janeiro - RJ, Brasil. E-mail: mgervasiopereira01@gmail.com