CERRADO ENCLAVE AND THE UPDATE OF THE MAPPING OF LANDSCAPE UNITS IN THE STATE OF RIO GRANDE DO NORTE

Diniz, Marco Túlio Mendonça; Souza, Ana Caroline Damasceno; Medeiros, Diogo Bernardino Santos de; Oliveira, Antônia Vilaneide Lopes Costa de; Silva, Sandro Damião Ribeiro da

doi:10.4215/rm2022.e21014

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Article • Mercator (Fortaleza) 21 • 2022 • https://doi.org/10.4215/rm2022.e21014 copy

CERRADO ENCLAVE AND THE UPDATE OF THE MAPPING OF LANDSCAPE UNITS IN THE STATE OF RIO GRANDE DO NORTE

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The mapping of landscape units is a dynamic process in which constant modifications are needed. Based on this, this article sought to update the mapping of landscape units in the state of Rio Grande do Norte. This was possible due to the combination of field activities and new methodological procedures, with analyzes and refinements of previous mappings conducted by Silva (2018)SILVA, S. D. R. Delimitação de unidades da paisagem do litoral setentrional potiguar e adjacências. 2018. 131 f. Dissertação (Mestrado em Geografia) - Universidade Federal do Rio Grande do Norte. Programa de Pós-Graduação e Pesquisa em Geografia, Natal, 2018., Bernardino (2019)BERNARDINO, D. S. M. Mapeamento e análise integrada das unidades de paisagem (geofácies) do Seridó Potiguar. 2019. 201 f. Dissertação (Mestrado em Geografia) - Programa de Pós-Graduação e Pesquisa em Geografia, Centro de Ciências Humanas, Letras e Artes, Universidade Federal do Rio Grande do Norte, Natal, 2019., and Souza (2020)SOUZA, A. C. D. Compartimentação das Unidades de Paisagem do Litoral Oriental e Agreste do Rio Grande do Norte, Brasil. 2020. 183 f. Dissertação (Mestrado em Geografia) - Universidade Federal do Rio Grande do Norte. Programa de Pós-Graduação e Pesquisa em Geografia, Natal, 2020.. The main result is the update of a mapping that includes the (re-) delimitation and (re-) classification of Morphoclimatic Domains, Natural Regions, and Geocomplexes in the territory of this state. A new unit was identified and inserted: a cerrado enclave, which, until then, had not been described and analyzed as such in the established literature; consequently, one more natural region and two geocomplexes were mapped and delimited. New territorial occurrences of units already identified/classified in the original work were also mapped and, therefore, there was a resizing of landscapes of different taxa, which resulted from these modifications and of the refinement of their limits, due to the greater scalar detail, with the deepening of the research.

Keywords:
Geosystem; Geoprocessing Techniques; Landscape Analysis

Resolution	Band Number	Description	Central Wavelength (nanometer)	Band Combinations
10 m	B02	Blue	490	True Color RGB 04/03/02 False Color 1 and 2 RGB 08/04/03 and 04/08/03
	B03	Green	560
	B04	Red	665
	B08	NIR	842
20 m	B05	Red Edge 1	705	SWIR 1 RGB 12/11/8ª
	B06	Red Edge 2	740
	B07	Red Edge 3	783
	B08A	Red Edge 4	865
	B11	SWIR 1	1610
	B12	SWIR 2	2190
60 m	B01	Aerosol	443	-
	B09	Water Vapor	940
	B10	Cirrus	1375

Morphoclimatic Domains	Natural Regions	Geo complexes		Area (km²)
Domain of semi-arid inter-plateau depressions in the Northeast (Vegetated by Caatinga) (1)	Semi-and coastal plains and tablelands (1.1)	Semi-arid coastal plain	(1.1.1)	1.022,07
		Semi-arid floodplains	(1.12)	932,32
		Semi-and coastal tablelands	(1.1.3)	2.853,65
	Sedimentary plateaus (1.2)	Chapada da Serra do Mel	(1.2.1)	858,19
		Chapada do Apodi	(1.2.2)	2.704,05
		Chapadas superimposed on the basement	(1.2.3)	537,71
		Inner tablelands	(1.2.4)	6.599,89
	Crystalline plateaus (1.3)	Borborema Plateau	(1.3.1)	5.025,6S
	Crystalline plateaus (1.3)	Residual and structural crystalline plateaus	(1.3.2)	2.691,59
	Semi-arid depressions (1.4)	Eastern depression	(1.4.1)	5.257,85
		Sertões do Piranhas	(1.4.2)	10.298,30
		Sertões do Apodi-Mossoró	(1.4.3)	7.288,24
Transition area (Agreste) (2)	Plains and Tablelands of the Agreste (2.1)	Floodplains of the Agreste Potiguar	(2.1.1)	273,47
		Tablelands of the Agreste Potiguar	(2.1.2)	2.001,22
		Coastal plain of the Agreste Potiguar	(2.1.3)	258,83
	Agreste Depression (2.2)	Depression of the Agreste Potiguar	(2.2.1)	1.224,26
Tropical Atlantic Domain (3)	Wet and sub-wet Plains and Tablelands (3.1)	Wet coastal tablelands	(2.21)	1.259,82
		Wet coastal plains	(3.1.2)	581,06
		Wet floodplains	(3.1.3)	133,13
Cerrado Enclave (4)	Plains and Tablelands of the Cerrado Enclave (4.1)	Floodplains of the Cerrado Enclave	(4.1.1)	202,13
Cerrado Enclave (4)	Plains and Tablelands of the Cerrado Enclave (4.1)	Tablelands of the Cenado Enclave	(4.1.2)	647,32

Scale (taxon) or nature of modification	Diniz and Oliveira (2018)DINIZ, M. T. M.; OLIVEIRA, A. V. L. C. Mapeamento das unidades de paisagem do Estado do Rio Grande do Norte, Brasil. Boletim Goiano de Geografia (Online), Goiânia, v. 38, n. 2, p. 342-364, maio/ago. 2018	Updated mapping
DOMAINS	Area of the morphoclimatic domains of the Atlantic Forest (3,540.59 km²)	(i) Reduction of the areacovered by the morphoclimatic domains of the Atlantic Forest, now totaling 1,566.58 km².
DOMAINS	Transition area (Agreste) (2,931.73 km²)	(ii) Increase in the Agreste area, reaching 3,757.78 km², already considering the (iii) reductions caused by the creation of the "Cerrado Enclave" unit (~736 km²)
NATURAL REGIONS	Wet depression (297.65 km²)	(iv) The natural region "Wet Depression" was suppressed, with the alteration of the limits of the Atlantic Forest Domain, being incorporated into the "Agreste Depression" (with an updated area of 1,224.26km²)
NATURAL REGIONS	Area of the Natural Region Plains and Tablelands of the Agreste (1,625.6 km²)	(v) After the addition of the mapped territory in the Natural Region of the Plains and Tablelands of the Agreste Potiguar, the area now occupies 2,001.22 km², already considering (vi) the reductions caused by the creation of the unit "Plains and Tablelands of the Cerrado Enclave", which, in turn, occupies ~736 km².
GEOCOMPLEXES	Mapping of 20 geocomplexes in RN	(vii) Mapping of 21 geocomplexes in RN. Total resulting from the accounting of the balance between (vii. 1) exclusion of the unit "Wet depression" and insertion of geocomplexes (vii. 2) "Floodplains of the cerrado enclave" and (vi.3) "Tablelands in the cerrado enclave".
	Area of the geocomplex Inner tablelands 6,681.22 km²	(viii) Decrease in the total area (6,599.88 km²) of the "Inner tablelands" geocomplex due to the loss of sections for the new unit "Tablelands of the Cerrado Enclave", even considering the (ix) insertion of a new polygon of occurrence of the Inner tablelands, in the Seridó region.
	Wet depression geocomplex	(x) The unit "Wet Depression" has been deleted; its area was incorporated by the geocomplex "Depression of the Agreste Potiguar"
	Reduction of the areas of the geo complexes "Tablelands of the agreste potiguar" and “Floodplains of the agreste potiguar”	(xi) Part of these areas were circumscribed by the geocomplexes "Tableland of the Cerrado Enclave" and "Floodplains of the Cerrado Enclave"
CARTOGRAPHIC REPRESENTATION	Color of the geocomplex Wet coastal tablelands R0G166B0	(vii) Color change in Wet Coastal Tablelands to a darker green R0G115B
	Color of the geocomplex Residual and structural crystalline plateaus R199G142B70	(xiii) Color change in the Residual and structural crystalline plateaus R114G75B67
	–	(xiv) Option for the following colors to represent the new units: Cerrado Enclave (R254; G148; B124); Plains and tablelands of the Cerrado Enclave (R254; G148; B124); Floodplains of the Cerrado Enclave (R255; G190; B190); Tablelands of the Cerrado Enclave (R254; G148; B124).
NOMENCLATURE	Natural region: Wet and sub-wet sedimentary plains and plateaus	(xv) It was changed to the term "Wet and sub-wet plains and tablelands", as it was considered more appropriate since the area does not present plateaus.

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