SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/21098 |
Resumo: | http://dx.doi.org/10.5902/1980509821098Studies on soils of forest islands within the savanna domain are key for understanding processes of landscape formation and evolution. We characterized the morphological, physical and chemical properties of soils at four different forest fragments that occur in the savanna-forest mosaic of northeastern Roraima, north Amazonia. The methodology was based on transects crossing the entire island, from east-west and north-south direction, digging up five soil profiles for sampling and classification. In addition, the neighboring savannas were also sampled following the same strategy, at 100 m long transects departing from the border, allowing comparisons to be made. Latosols were the dominant soil class in all four islands, followed by Ultisols and Plinthosols. All soils were dystric , with low CEC and acid. Better chemical and physical conditions were observed in forested soils compared with surrounding savannas, in a given soil class. Thus, in spite of no variation on soil class at different phytophysionomies at a given gradient, specific chemical and physical attributes were significantly varied, exerting a positive effect for the establishment of forest vegetation. Despite their occurrence side-by-side in the savanna- forest mosaic, the present –day climate agrees with the existence of savanna in the flat landforms, whereas forest islands are conditioned by subtle, yet significant, soil physico-chemical variations, with no need to invoke any paleoclimate for explaining this relationship. Further in depth studies may contribute for testing the hypothesis that Quaternary shifts of the expansion and contraction of forest may represent paleoclimate relicts isolated within the savanna domain. |
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SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIARELAÇÕES SOLO–VEGETAÇÃO EM “ILHAS” FLORESTAIS E SAVANAS ADJACENTES, NO NORDESTE DE RORAIMAclimate changes and soilsamazon soilsamazon paleoecologysoil ecology.mudanças climáticas e solossolos da Amazôniapaleoecologia da Amazôniaecologia de solos.http://dx.doi.org/10.5902/1980509821098Studies on soils of forest islands within the savanna domain are key for understanding processes of landscape formation and evolution. We characterized the morphological, physical and chemical properties of soils at four different forest fragments that occur in the savanna-forest mosaic of northeastern Roraima, north Amazonia. The methodology was based on transects crossing the entire island, from east-west and north-south direction, digging up five soil profiles for sampling and classification. In addition, the neighboring savannas were also sampled following the same strategy, at 100 m long transects departing from the border, allowing comparisons to be made. Latosols were the dominant soil class in all four islands, followed by Ultisols and Plinthosols. All soils were dystric , with low CEC and acid. Better chemical and physical conditions were observed in forested soils compared with surrounding savannas, in a given soil class. Thus, in spite of no variation on soil class at different phytophysionomies at a given gradient, specific chemical and physical attributes were significantly varied, exerting a positive effect for the establishment of forest vegetation. Despite their occurrence side-by-side in the savanna- forest mosaic, the present –day climate agrees with the existence of savanna in the flat landforms, whereas forest islands are conditioned by subtle, yet significant, soil physico-chemical variations, with no need to invoke any paleoclimate for explaining this relationship. Further in depth studies may contribute for testing the hypothesis that Quaternary shifts of the expansion and contraction of forest may represent paleoclimate relicts isolated within the savanna domain.http://dx.doi.org/10.5902/1980509821098O estudo de solos em ilhas florestais inseridas em áreas de domínio de savanas é fundamental para compreender os processos de formação da paisagem. Este trabalho caracterizou propriedades morfológicas, físicas e químicas de solos em quatro fragmentos naturais de florestas de ocorrência no mosaico savana-floresta em Roraima, norte da Amazônia. O método consistiu em transectos atravessando as ilhas nos sentidos leste–oeste e norte–sul, onde foram abertas cinco trincheiras para a coleta de amostras e estudos de solos. Nas áreas de savana contíguas a cada ilha foram estabelecidos transectos de 100 m de comprimento e abertas cinco trincheiras equidistantes para caracterização química e física do solo comparativa. Os Latossolos foram as classes de solos predominantes nas quatro ilhas investigadas, seguida de Argissolos e Plintossolos, todos predominantemente oligotróficos (distróficos, de baixa CTC, ácidos). Condições químicas e físicas melhores foram verificadas nos solos das ilhas florestais em relação às áreas de savana circundantes, numa mesma classe de solo. Assim, embora a classe de solo não tenha variado entre diferentes fitofisionomias em um dado gradiente, características químicas e físicas específicas variaram e podem exercer influência positiva no estabelecimento de vegetação florestada. Embora florestas e savanas ocorram lado a lado, em mosaico, o clima atual com longa estação seca é concordante com a existência da savana em relevo plano e a ocorrência das ilhas florestais parece condicionada a variações físico-químicas sutis dos solos, sem necessidade de invocar uma relação com oscilações paleoclimáticas. Estudos mais aprofundados posteriores poderão testar a hipótese de contração ou expansão florestal durante o Quaternário, buscando evidências de que tais ilhas possam representar relíquias paleoclimáticas imersas em domínio savânico.Universidade Federal de Santa Maria2016-03-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2109810.5902/1980509821098Ciência Florestal; Vol. 26 No. 1 (2016); 135-146Ciência Florestal; v. 26 n. 1 (2016); 135-1461980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/21098/pdfFeitosa, Keily Katiany AlmeidaVale Júnior, José Frutuoso doSchaefe, Carlos Ernesto Gonçalves ReynaudSousa, Maria Ivonilde Leitão deNascimento, Pedro Paulo Ramos Ribeiroinfo:eu-repo/semantics/openAccess2017-04-07T16:57:32Zoai:ojs.pkp.sfu.ca:article/21098Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-07T16:57:32Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA RELAÇÕES SOLO–VEGETAÇÃO EM “ILHAS” FLORESTAIS E SAVANAS ADJACENTES, NO NORDESTE DE RORAIMA |
title |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA |
spellingShingle |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA Feitosa, Keily Katiany Almeida climate changes and soils amazon soils amazon paleoecology soil ecology. mudanças climáticas e solos solos da Amazônia paleoecologia da Amazônia ecologia de solos. |
title_short |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA |
title_full |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA |
title_fullStr |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA |
title_full_unstemmed |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA |
title_sort |
SOIL-VEGETATION RELATIONSHIP IN FOREST ISLANDS AND ADJACENT SAVANNA AT THE NORTHEAST RORAIMA, AMAZONIA |
author |
Feitosa, Keily Katiany Almeida |
author_facet |
Feitosa, Keily Katiany Almeida Vale Júnior, José Frutuoso do Schaefe, Carlos Ernesto Gonçalves Reynaud Sousa, Maria Ivonilde Leitão de Nascimento, Pedro Paulo Ramos Ribeiro |
author_role |
author |
author2 |
Vale Júnior, José Frutuoso do Schaefe, Carlos Ernesto Gonçalves Reynaud Sousa, Maria Ivonilde Leitão de Nascimento, Pedro Paulo Ramos Ribeiro |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Feitosa, Keily Katiany Almeida Vale Júnior, José Frutuoso do Schaefe, Carlos Ernesto Gonçalves Reynaud Sousa, Maria Ivonilde Leitão de Nascimento, Pedro Paulo Ramos Ribeiro |
dc.subject.por.fl_str_mv |
climate changes and soils amazon soils amazon paleoecology soil ecology. mudanças climáticas e solos solos da Amazônia paleoecologia da Amazônia ecologia de solos. |
topic |
climate changes and soils amazon soils amazon paleoecology soil ecology. mudanças climáticas e solos solos da Amazônia paleoecologia da Amazônia ecologia de solos. |
description |
http://dx.doi.org/10.5902/1980509821098Studies on soils of forest islands within the savanna domain are key for understanding processes of landscape formation and evolution. We characterized the morphological, physical and chemical properties of soils at four different forest fragments that occur in the savanna-forest mosaic of northeastern Roraima, north Amazonia. The methodology was based on transects crossing the entire island, from east-west and north-south direction, digging up five soil profiles for sampling and classification. In addition, the neighboring savannas were also sampled following the same strategy, at 100 m long transects departing from the border, allowing comparisons to be made. Latosols were the dominant soil class in all four islands, followed by Ultisols and Plinthosols. All soils were dystric , with low CEC and acid. Better chemical and physical conditions were observed in forested soils compared with surrounding savannas, in a given soil class. Thus, in spite of no variation on soil class at different phytophysionomies at a given gradient, specific chemical and physical attributes were significantly varied, exerting a positive effect for the establishment of forest vegetation. Despite their occurrence side-by-side in the savanna- forest mosaic, the present –day climate agrees with the existence of savanna in the flat landforms, whereas forest islands are conditioned by subtle, yet significant, soil physico-chemical variations, with no need to invoke any paleoclimate for explaining this relationship. Further in depth studies may contribute for testing the hypothesis that Quaternary shifts of the expansion and contraction of forest may represent paleoclimate relicts isolated within the savanna domain. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-03-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/21098 10.5902/1980509821098 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/21098 |
identifier_str_mv |
10.5902/1980509821098 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/21098/pdf |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 26 No. 1 (2016); 135-146 Ciência Florestal; v. 26 n. 1 (2016); 135-146 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944130546106368 |