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Previous issue date: 2017-02-20 / A delimita??o das Florestas Estacionais deve ser realizada incluindo v?rios aspectos,
como solo, relevo e vegeta??o. No Nordeste brasileiro, a Floresta Estacional Decidual ocorre
em zona de contato entre a Caatinga, o Cerrado e a Mata Atl?ntica, sendo faixas estreitas e
transicionais. No RN ocorre uma versatilidade florestal entre esses ecossistemas. A varia??o
de altitude ? um fator importante de mudan?as de padr?es vegetacionais, no entanto pouco
estudada em florestas nacionais e locais. O estudo foi realizado em uma ?rea de floresta
decidual no munic?pio de Maca?ba. Esta foi dividida em 4 cotas, com diferen?a de 19 m de
altitude entre elas. Foram coletados dados flor?sticos e fitossociol?gicos. Foi inventariado um
total de 449 indiv?duos distribu?dos em 69 esp?cies, 49 g?neros e 36 fam?lias, sendo a fam?lia
mais representativa a Fabaceae com 11 esp?cies e 164 indiv?duos, seguidas por Myrtaceae
(10 esp?cies e 98 indiv?duos) e Malpighiaceae (4 esp?cies e 10 indiv?duos). As esp?cies
Chamaecrista ensiformis (Vell.) H.S. Irwin & Barneby, Guapira laxa (Netto) Furlan e
Zanthoxylum syncarpum Tul. obtiveram os maiores ?ndices Fr: 50, 45 e 50 e VI: 25,11%;
17,09% e 19,58% respectivamente. Nenhuma esp?cie ocorreu ao longo de todo gradiente,
havendo uma entrada e sa?da de t?xons constante. Os valores da DCA foram de -0,851 e -
6,8794; os ?ndices de J?, 0,8432, (C) 0,9533 E H?3,532; C2 apresentou os melhores valores
para todos os ?ndices analisados, evidenciando um excelente estagio de conserva??o e
fitofisionomia relacionada ? Mata Atl?ntica; C1 e C4, apesar da dist?ncia, apresentam
fitofisionomia da Caatinga e do Cerrado, enquanto C3 apresenta t?xons de ampla distribui??o
entre os biomas nacionais. Assim, observa-se uma significante dissimilaridade na estrutura
vegetacional de modo suave e cont?nuo. / The delimitation of Deciduous Forests should be done including several aspects, such
as soil, relief and vegetation. In the Brazilian Northeast, the Decidual Seasonal forest occurs
in a contact zone between the Caatinga, the Cerrado and the Atlantic Forest, being narrow and
transitional bands. In the RN there is a forest versatility between these ecosystems. The
altitude variation is an important factor of changes in vegetation patterns, however not deeply
studied in national and local forests. The study was carried out in an area of deciduous forest
in the county of Maca?ba, which was divided into 4 zones with a difference of 19 m of altitude
between them, floristic and phytosociological data were collected. A total of 449 individuals
distributed in 69 species, 49 genus and 36 families were inventoried. Fabaceae family was the
most representative one with 11 species and 164 individuals, followed by Myrtaceae (10
species and 98 individuals) and Malpighiaceae (4 species and 10 indivisuals). Chamaecrista
ensiformis (Vell.) H.S. Irwin & Barneby, Guapira laxa (Netto) Furlan e Zanthoxylum
syncarpum Tul species obtained the higher indexes Fr: 50, 45 e 50 e VI: 25,11%; 17,09% e
19,58% , repectively. No species occurred along the entire gradient, with a constant input
and output of taxa, DCA values was -0,851 e -6,8794, the indexes de of J?0,8432 , (C) 0,9533
E H?3,532; C2 presented the best values for all analyzed indexes evidencing an excellent
stage of conservation and phytosanation related to the Atlantic Forest. Ci and C4 in spite of
the distance they present Phytophysiognomy of Caatinga and Cerado; While C3 presents taxa
of wide distribution among the national biomes. Thus a significant dissimilarity in the
vegetative structure is observed in a smooth and continuous way.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23625 |
| Date | 20 February 2017 |
| Creators | Costa, Heloise Andrielly Nascimento |
| Contributors | 12996566840, http://lattes.cnpq.br/1701890630305298, Souza, Alexandre Fadigas de, 02845395701, http://lattes.cnpq.br/7844758818522706, Tinoco, Leonardo Bezerra de Melo, 02778884840, http://lattes.cnpq.br/3431175632555659, Praxedes, Sidney Carlos, 02106448422, http://lattes.cnpq.br/6609231229691480, Costa, Malcon do Prado, Oliveira, Paulo Rog?rio Soares de |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIAS FLORESTAIS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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