Regenera??o natural como indicador de restaura??o florestal em trechos de Floresta Estacional Semidecidual no Espinha?o Meridional, MG.

• Main Author: Louren?o, Alessandra Fonseca
• Other Authors: Pereira, Israel Marinho
• Language: Portuguese
• Published: UFVJM 2017
• Subjects: Sucess?o ecol?gica; Pastagem degradada; Grupos ecol?gicos; Ecossistema de refer?ncia; Succession; Degraded pasture; Ecological groups; Reference ecosystem
• Online Access: http://acervo.ufvjm.edu.br/jspui/handle/1/1385

?rea de concentra??o: Recursos florestais. === Submitted by Jos? Henrique Henrique ([e-mail]) on 2017-06-06T17:23:43Z No. of bitstreams: 2 alessandra_fonseca_louren?o.pdf: 879765 bytes, checksum: 7490aea1a6cc341415b4e1922959eca5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) === Approved for entry into archive by Rodrigo Martins Cruz ([e-mail]) on 2017-06-22T15:31:45Z (GMT) No. of bitstreams: 2 alessandra_fonseca_louren?o.pdf: 879765 bytes, checksum: 7490aea1a6cc341415b4e1922959eca5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) === Made available in DSpace on 2017-06-22T15:31:45Z (GMT). No. of bitstreams: 2 alessandra_fonseca_louren?o.pdf: 879765 bytes, checksum: 7490aea1a6cc341415b4e1922959eca5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) === Tendo em vista a import?ncia da utiliza??o de indicadores que reflitam o sucesso da restaura??o florestal em um ambiente anteriormente degradado, esse estudo avaliou a regenera??o natural de um ambiente restaurado por plantio direto de mudas com idade de seis anos, em compara??o a um ambiente de refer?ncia (mata conservada), ambos inseridos em Floresta Estacional Semidecidual, no Munic?pio de Dom Joaquim, MG. Os indiv?duos regenerantes com altura ? 0,5 m e di?metro ? altura do peito (DAP) menor ou igual a 5 cm foram amostrados em 38 parcelas de 25 m?, distribu?das em cada ambiente. Os par?metros relacionados ? composi??o de esp?cies (riqueza, diversidade e similaridade), ? estrutura (densidade e ?rea basal) e aos grupos ecol?gicos (s?ndrome de dispers?o e categoria sucessional) foram comparados entre os dois ambientes. O ?ndice de Jaccard mostrou alta similaridade entre os dois ambientes (SJ=54,7%), revelando a forte influ?ncia do ecossistema de refer?ncia como fonte de prop?gulos para o ambiente em restaura??o. N?o houve diferen?a significativa dos par?metros estruturais, do potencial de riqueza de esp?cies e do perfil de diversidade entre os ambientes. Entretanto, houve diferen?a entre os grupos ecol?gicos, nos quais o ambiente em restaura??o apresentou menor propor??o de indiv?duos na guilda n?o-pioneira e na guilda zooc?rica. Com o avan?o da sucess?o no ambiente em restaura??o, espera-se que as guildas se equiparem ?s do ambiente de mata. A inser??o do ambiente em restaura??o em matriz florestal conservada foi determinante para a recomposi??o dos par?metros que obtiveram valores similares aos do ambiente de refer?ncia. === Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. === Due to the importance of using indicators that reflect the success of forest restoration in a previously degraded environment, this study evaluated the natural regeneration of an environment restored till the age of six years, which was previously degraded grasslands, compared to a reference environment (preserved forest), both located in semideciduous forest in Conceicao do Mato, municipality of MG. The regenerating individuals with height ? 0.5 m and diameter at breast height (DBH) less than or equal to 0.05 m were sampled in 38 plots of 25 m?, distributed in each environment. The parameters related to species composition (richness, diversity and similarity), structure (density and basal area) and environmental groups (dispersion syndrome and successional category) were compared between the two environments. The Jaccard index indicated high similarity between the two environments (SJ = 54.7%), showing the strong influence of the forest in environmental floristic composition restoration by the arrival of propagules. No significant differences of structural parameters, the potential of species richness and diversity profile among environments was identified. However, there was a difference between ecological groups, where the environment restoration showed lower proportion of individuals in non-pioneer guild and zoochorous guild. With the advancement of succession environmental restoration, it is expected that the guilds will equip the mata environment. Environmental integration in restoration forest matrix conserved was crucial to the recovery of the parameters obtained similar values to the reference environment.