{"id":7279,"date":"2019-11-11T13:11:02","date_gmt":"2019-11-11T15:11:02","guid":{"rendered":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/?page_id=7279"},"modified":"2024-08-22T12:15:05","modified_gmt":"2024-08-22T15:15:05","slug":"cassia-adriana-bazi-ms","status":"publish","type":"page","link":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/dissertacoesteses\/cassia-adriana-bazi-ms\/","title":{"rendered":"C\u00e1ssia Adriana Bazi MS"},"content":{"rendered":"

\"faixapos6\"<\/a><\/h2>\n
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C\u00e1ssia Adriana Bazi<\/h2>\n
\n

\"\"<\/a><\/p>\n

No dia 30 de abril de 2019, a aluna da P\u00f3s-gradua\u00e7\u00e3o em Biodiversidade Vegetal e Meio Ambiente do Instituto de Bot\u00e2nica de S\u00e3o Paulo (IBt),
\nC\u00e1ssia Adriana Bazi,\u00a0 defendeu sua disserta\u00e7\u00e3o de Mestrado intitulada:
\n\u201cProdu\u00e7\u00e3o e decomposi\u00e7\u00e3o de serapilheira em um fragmento urbano de Mata Atl\u00e2ntica\u201d<\/p>\n

A banca examinadora foi composta pelo orientador Dr. Eduardo Pereira Cabral Gomes do N\u00facleo de Pesquisas em Ecologia (IBt), pela Dra. Regina Maria de Moraes do N\u00facleo de Pesquisas em Ecologia (IBt) e pela Dra. Leda Lorenzo Montero do Departamento de Ci\u00eancias Biol\u00f3gicas – Setor de Ci\u00eancias Ambientais (UNIFESP).<\/p>\n

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Produ\u00e7\u00e3o e decomposi\u00e7\u00e3o de serapilheira em um fragmento urbano de Mata Atl\u00e2ntica<\/h3>\n
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ABSTRACT<\/strong><\/p>\n

Litterfall is the main sign of nutrient transfer from plants to soil; it supplies nutrients to an ecosystem through the decomposition of accumulated matter. The plant remains which form organic matter in the soil keep moisture and the nutrient reserves which will be reused by other plants after decomposition. Therefore, keeping track of the production dynamics, the build-up and the decomposition of this compartment is vital to gather knowledge of the impacts of natural or anthropic origin which may change forest dynamics. The data collected on the effects of climate change upon the processes of production and decomposition, especially rainfall levels and temperature, are of the utmost importance to understanding forest dynamics throughout time. Thus, this study aims at estimating total production of litterfall dynamics and portions (leaves, branches, flowers, fruits\/seeds) and the buildup of litterfall on the soil, relating them to climatic variables (rainfall, temperature and wind flow) over a period of six years (2013-2018); the decomposition of leaves of four species representing different successional groups, both in the rainy and dry seasons, along with the impacts of anthropic origin caused by trampling in a stretch of the Atlantic Forest of the Parque Estadual das Fontes do Ipiranga (PEFI). The production of litterfall was estimated by using 30 round-collectors (0,79 m) placed over an area of 1,08 ha (180 x 60 m). In the same experimental area, samples of accumulated litterfall were taken quarterly next to the collectors and alongside the trail in a trampled and unstopped place, using a leaked mold sieve of 0,30 m in diameter. In order to evaluate the process of leaf mass loss during the rainy and dry seasons, litter bags<\/em> were used. The average annual of litterfall production was 9.397 +<\/u> 486 kg.ha-1<\/sup>, with significant differences between years. The leaf portion was the one which most contributed to the enrichment of forest floor (62%), followed by branches (26%); flowers (1,72%); fruits\/seeds (3,54%), and miscellanies (6,21%), with significant monthly differences in material fall. There was greater production between September and February (warm and rainy season). The total litterfall production was positively related to both rainfall and wind flow. The amount of litterfall accumulated yearly was 6.761+<\/u>370 Kg.ha-1<\/sup>, with a significant variation between years, and the greatest buildup in 2014, a year with rainfall below the climatological average. There was a significant variation between months. The decomposition quotient was k=1,47, and less than one (1) year was needed for material renovation. There was a significant and positive correlation between the amount of accumulated litterfall at the trampled site and the distance from the edge, with soil exposure, resulting from the impacts of trampling. The Euterpe edulis<\/em>, Cupania oblongifolia <\/em>and Calyptrantes grandifolia <\/em>leaves suffered the greatest mass loss in the rainy period; Alchornea sidifolia<\/em> leaves suffered the greatest losses in the dry period. However, no significant difference was observed in the leaf mass loss among those species in the same seasons or between wet and dry seasons, although the loss was always greater in the wet season. The production of litterfall has increased over the past few years; such production is high and the time required for material renovation is less than a year, indicating that the fragment has remained stable over the years, at least in the studied sections of the forest.<\/p>\n

Keywords:<\/strong> cycling, soil compaction, deposition, dynamics, litterbags, seasonality, trail<\/p>\n

RESUMO<\/strong><\/p>\n

A serapilheira representa a principal via de transfer\u00eancia de nutrientes da vegeta\u00e7\u00e3o para o solo, suprindo as necessidades nutricionais do ecossistema por meio da decomposi\u00e7\u00e3o do material acumulado. Os detritos formadores da mat\u00e9ria org\u00e2nica no solo mant\u00eam a umidade e a reserva de nutrientes que ser\u00e3o reutilizados pelas plantas ap\u00f3s o processo de decomposi\u00e7\u00e3o. Portanto, o acompanhamento da din\u00e2mica de produ\u00e7\u00e3o, ac\u00famulo e decomposi\u00e7\u00e3o deste compartimento \u00e9 essencial para o conhecimento dos impactos de origem antr\u00f3pica ou naturais que possam alterar a din\u00e2mica da floresta. Os levantamentos dos efeitos das altera\u00e7\u00f5es clim\u00e1ticas sobre os processos de produ\u00e7\u00e3o e decomposi\u00e7\u00e3o, principalmente pluviosidade e temperatura s\u00e3o de grande import\u00e2ncia para compreens\u00e3o da din\u00e2mica florestal ao longo do tempo. Dessa forma, este trabalho teve como objetivo estimar, no per\u00edodo de seis anos (2013 a 2018), a din\u00e2mica da produ\u00e7\u00e3o de serapilheira total e fra\u00e7\u00f5es (folhas, galhos, flores, frutos\/sementes) e o ac\u00famulo da serapilheira sobre o solo relacionando-os \u00e0s vari\u00e1veis clim\u00e1ticas (precipita\u00e7\u00e3o, temperatura e velocidade do vento); a decomposi\u00e7\u00e3o de folhas de quatro esp\u00e9cies representativas de diferentes grupos sucessionais, nas esta\u00e7\u00f5es \u00famida e seca e os impactos de origem antr\u00f3pica provocados por pisoteio em um trecho da Floresta Ombr\u00f3fila Densa do Parque Estadual das Fontes do Ipiranga (PEFI). A serapilheira produzida foi estimada utilizando-se 30 coletores circulares (0,79m) em uma \u00e1rea de 1,08 ha (180 x 60 m). Na mesma \u00e1rea experimental, foram tomadas trimestralmente amostras de serapilheira acumulada ao lado dos coletores e ao longo de uma trilha em local pisoteado e n\u00e3o pisoteado,\u00a0 utilizando-se uma peneira de molde vazada de 0,30 m de di\u00e2metro. Para avaliar o processo de perda de massa de folhas durante as esta\u00e7\u00f5es \u00famida e seca, foram utilizadas bolsas de decomposi\u00e7\u00e3o litter bags<\/em>. A m\u00e9dia anual da serapilheira produzida foi de 9.397+<\/u>486 kg.ha-1<\/sup>, com diferen\u00e7as significativas entre os anos. A fra\u00e7\u00e3o folhas foi a que mais contribuiu para o enriquecimento do piso florestal, com 62% do total, seguido por partes lenhosas (26%); flores (1,72%); frutos\/sementes (3,54%); e miscel\u00e2nea (6,21%), com diferen\u00e7as mensais significativas na queda do material. Houve maior produ\u00e7\u00e3o entre setembro e fevereiro (esta\u00e7\u00e3o quente e \u00famida). A produ\u00e7\u00e3o total de serapilheira teve correla\u00e7\u00e3o positiva com a precipita\u00e7\u00e3o e velocidade do vento. A quantidade da serapilheira acumulada anualmente foi de 6.761+<\/u>370 Kg.ha-1<\/sup> com varia\u00e7\u00e3o significativa entre os anos, maior acum\u00falo em 2014, ano com precipita\u00e7\u00e3o abaixo da m\u00e9dia climatol\u00f3gica. Houve varia\u00e7\u00e3o significativa entre os meses. O quociente de decomposi\u00e7\u00e3o foi k=1,47, sendo necess\u00e1rios<\/span> menos de um (1) ano para renova\u00e7\u00e3o do material. Houve correla\u00e7\u00e3o significativa e positiva entre a quantidade de serapilheira acumulada no local pisoteado e a dist\u00e2ncia da borda, com exposi\u00e7\u00e3o do solo, resultante dos impactos do pisoteio. As folhas de Euterpe edulis, Cupania oblongifolia e Calyptrantes grandifolia<\/em> tiveram as maiores perdas de massa no per\u00edodo \u00famido, apenas Alchornea sidifolia<\/em> teve redu\u00e7\u00e3o no per\u00edodo seco. Por\u00e9m, n\u00e3o foram observadas diferen\u00e7as significativas na perda de massa das folhas entre as esp\u00e9cies na mesma esta\u00e7\u00e3o ou entre as esta\u00e7\u00f5es \u00famida e seca\u00a0 ainda que a perda sempre tenha sido maior no per\u00edodo \u00famido. O processo de produ\u00e7\u00e3o da serapilheira tem aumentado ao longo dos anos, sua produ\u00e7\u00e3o \u00e9 alta e o tempo de renova\u00e7\u00e3o do material ocorre em menos de um ano indicando que o fragmento est\u00e1 se mantendo est\u00e1vel ao longo dos anos, ao menos no trecho estudado.<\/p>\n

Palavras-chave:<\/strong> ciclagem, compacta\u00e7\u00e3o do solo, deposi\u00e7\u00e3o, din\u00e2mica, litterbags, sazonalidade, trilha<\/p>\n

\n

\"pdf_grande\"<\/a>C\u00e1ssia Adriana Bazi<\/strong><\/a>
\nProdu\u00e7\u00e3o e decomposi\u00e7\u00e3o de serapilheira em um fragmento urbano de Mata Atl\u00e2ntica<\/a><\/p>\n

\n

\u00a0VOLTAR AS DISSERTA\u00c7\u00d5ES E TESES<\/a><\/strong><\/p>\n

\n","protected":false},"excerpt":{"rendered":"

C\u00e1ssia Adriana Bazi No dia 30 de abril de 2019, a aluna da P\u00f3s-gradua\u00e7\u00e3o em Biodiversidade Vegetal e Meio Ambiente do Instituto de Bot\u00e2nica de S\u00e3o Paulo (IBt), C\u00e1ssia Adriana Bazi,\u00a0 defendeu sua disserta\u00e7\u00e3o de Mestrado intitulada: \u201cProdu\u00e7\u00e3o e decomposi\u00e7\u00e3o de serapilheira em um fragmento urbano de Mata Atl\u00e2ntica\u201d A banca examinadora foi composta pelo […]<\/p>\n","protected":false},"author":103,"featured_media":0,"parent":249,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/pages\/7279"}],"collection":[{"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/users\/103"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/comments?post=7279"}],"version-history":[{"count":3,"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/pages\/7279\/revisions"}],"predecessor-version":[{"id":9317,"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/pages\/7279\/revisions\/9317"}],"up":[{"embeddable":true,"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/pages\/249"}],"wp:attachment":[{"href":"https:\/\/www.infraestruturameioambiente.sp.gov.br\/pgibt\/wp-json\/wp\/v2\/media?parent=7279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}