A invasão de um fragmento florestal em São Paulo (SP) pela palmeira australiana Archontophoenix cunninghamiana H. Wendl. &amp; Drude

Dislich, Ricardo; Kisser, Nabor; Pivello, Vânia Regina

doi:10.1590/s0100-84042002000100008

Cited by 31 publications

(42 citation statements)

References 18 publications

(14 reference statements)

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“…In addition, some palms are also favored at disturbed sites, where they can flourish (Aguiar & Tabarelli 2010;Andreazzi et al 2012). In view of these factors, problems with invasive palm species are to be expected (Svenning 2002) and have been reported by several authors (Dislich et al 2002;Svenning 2002;Christianini 2006;Meyer et al 2008).…”

Section: Introductionmentioning

confidence: 95%

The exotic palm Roystonea oleracea (Jacq.) O. F. Cook (Arecaceae) on an island within the Atlantic Forest Biome: naturalization and influence on seedling recruitment

Zucaratto

Pires

2014

Acta Bot. Bras.

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Here, we investigated the population structure of the exotic palm Roystonea oleracea in a swamp on an island within the Atlantic Forest Biome, evaluating its influence on the seedling recruitment of other plant species. The population structure was analyzed in six 4 × 30 m plots, within which we categorized all individuals by ontogenetic stage. The influence of R. oleracea on the seedling recruitment of other plant species was evaluated in 2 × 2 m plots established beneath palm crowns and in adjacent areas without palms. We recorded 53 R. oleracea individuals. The majority (56.6%) of the R. oleracea population was composed of immature adults, followed by mature adults. The density, richness and diversity of seedling species differed significantly between areas beneath and away from palms, the values being lower beneath R. oleracea crowns. Our results indicate that R. oleracea recruitment does not require human intervention, the number of reproductive individuals characterizing successful naturalization. This underscores the need for management policies aimed at palm eradication in order to avoid reductions in biodiversity.

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Section: Introductionmentioning

confidence: 95%

The exotic palm Roystonea oleracea (Jacq.) O. F. Cook (Arecaceae) on an island within the Atlantic Forest Biome: naturalization and influence on seedling recruitment

Zucaratto

Pires

2014

Acta Bot. Bras.

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“…O conceito de exótico desconsidera fronteiras geopolíticas, podendo a invasão ocorrer em regiões geográficas muito próximas, mas biogeograficamente distintas. Tal processo tende a se multiplicar e disseminar, progressivamente, dificultando a resiliência ambiental (WESTBROOKS, 1998;DISLICH et al, 2002). Espécies com alta capacidade invasora, como Pinus spp., tendem a inibir a sucessão ecológica, eliminando espécies de flora e fauna (STURGESS; ATKINSON, 1993).…”

Section: Introductionunclassified

INVASÃO BIOLÓGICA DE Pinus elliottii VAR. elliottii NO PARQUE ESTADUAL DO RIO VERMELHO, FLORIANÓPOLIS, SC

Bechara¹,

Reis²,

Trentin³

2013

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ResumoA invasão biológica é conceituada como o processo de introdução e adaptação de espécies exóticas nos ecossistemas naturais, as quais se tornam invasoras, causando alterações ecológicas. Espécies com alta capacidade invasora, como Pinus elliottii, tendem a inibir a sucessão ecológica. . Se por um lado a inexistência de sementes de Pinus spp. no banco pode parecer uma vantagem, a chuva de sementes contínua representa uma ameaça constante para a reinfestação dessa espécie na área. Palavras-chave: Banco de sementes; chuva de sementes; restauração ecológica. Abstract Biological invasion of Pinus elliottii var. elliottii in Rio Vermelho State Park, Florianópolis, SC.Biological invasion is defined as the process of introduction and adaptation of non-native species into natural ecosystems which become invasive and cause ecological changes. Species with high invasive capacity, such as Pinus elliottii, tend to inhibit ecological succession. In 1962 the Forestry Station of Rio Vermelho in Florianópolis-SC was created, and 25 species of pine tested in 500 ha of dunes. After 40 years, approximately 250 ha of dunes and restingas, adjacent to the plantations were invaded by Pinus elliottii var. elliottii. In order to evaluate its invasive capacity, the seed bank and seed rain were sampled in three habitat types: i) inner stand of Pinus elliottii var. elliottii ii) stand border; and iii) preserved mature restinga with tree covering. Seedling emergence of pines was not observed in the seed bank, suggesting that the seeds do not remain viable in the soil. The seed rain was continuous throughout the year, generating about two million viable seeds.ha . If the lack of a seed bank may seem an advantage, the continuous seed rain represents a constant threat to the re-infestation of the species in the park.

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“…As sementes semeadas e mantidas no sol da classe 3 apresentaram um primeiro pico de emergência no sétimo e outro pico no décimo terceiro O fato de Tecoma stans não recrutar em ambiente sombreado confirma o seu comportamento invasor em áreas abertas. A intolerância ao sombreamento é observada na maioria das espécies exóticas invasoras (Vieira 2009), por serem heliófitas e se estabelecem em ambientes bastante iluminados (Dislich et al 2002).…”

Section: Resultsunclassified

Massa das sementes de Tecoma stans L. Juss. ex Kunth (Bignoniaceae): efeitos na emergência e desenvolvimento de suas plântulas no sol e na sombra

2011

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The aim of this study was to evaluate the effect of Tecoma stans L. Juss. ex Kunth seeds mass on initial emergence, growth and, seedling development under different light conditions. The seeds were separated in four mass classes and sowed in four replicates of 24 seeds for each class, under full sun and canopy shade. Under sun environment was observed a greater percentage of emergence. Heavy seeds presented the greater percentage of emergence under both environments, but a greater rate was observed under canopy shade. One month after the start of experiments, the seedlings at the shade environment presented 100% of mortality. The growth and development seedlings under full sun were noticed for five months. In this period, only in the first three months was possible to observe the effects of Tecoma stans seeds mass on capacity of seedlings to acquire dry mass. The seedlings biomass partitions were similar among the tested mass class. The seedlings of smaller mass tended to a high specific leaf area in relation to the seedlings from large seeds, mainly in the first three months, resulting in a great acquisition of dry mass by these seedlings. In the fourth month, the specific leaf area did not present any tendency. Because the biggest seeds to give rise seedlings with best initial development than smallest seeds can be considered as species reproductive strategy. To produce seeds of different sizes also can be considered as way of species to spread in many microhabitats. Resumo: Este estudo teve como objetivo avaliar o efeito da massa das sementes de Tecoma stans L. Juss. ex Kunth na emergência, no crescimento e no desenvolvimento inicial de suas plântulas sob diferentes condições de luminosidade. As sementes foram separadas em quatro classes de massa e semeadas em quatro réplicas de 24 sementes para cada classe, no sol e na sombra. No ambiente de sol ocorreu a maior porcentagem de emergência. Dentre as classes de massa, sementes maiores apresentaram maior porcentagem de emergência em ambos os ambientes, porém a maior velocidade foi observada na sombra. Após um mês do início do experimento as plântulas da sombra apresentaram 100% de mortalidade. O crescimento e desenvolvimento das plântulas no sol foram acompanhados mensalmente por um período de cinco meses. Neste período, foi possível observar os efeitos da massa das sementes de Tecoma stans no ganho de massa seca das plântulas nos três primeiros meses; a partir deste, a massa das sementes não teve efeito no ganho de matéria seca pelas plântulas. A partição da biomassa das plântulas não diferiu entre as classes de massa testadas. As plântulas de menor massa apresentaram uma tendência a uma maior área foliar específica em relação às plântulas originárias de sementes mais pesadas, principalmente nos três primeiros meses, resultando em um ganho maior de matéria seca das plântulas de menor classe de massa. Já no quarto mês, a área foliar específica não apresentou qualquer

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A invasão de um fragmento florestal em São Paulo (SP) pela palmeira australiana Archontophoenix cunninghamiana H. Wendl. & Drude

Cited by 31 publications

References 18 publications

The exotic palm Roystonea oleracea (Jacq.) O. F. Cook (Arecaceae) on an island within the Atlantic Forest Biome: naturalization and influence on seedling recruitment

The exotic palm Roystonea oleracea (Jacq.) O. F. Cook (Arecaceae) on an island within the Atlantic Forest Biome: naturalization and influence on seedling recruitment

INVASÃO BIOLÓGICA DE Pinus elliottii VAR. elliottii NO PARQUE ESTADUAL DO RIO VERMELHO, FLORIANÓPOLIS, SC

Massa das sementes de Tecoma stans L. Juss. ex Kunth (Bignoniaceae): efeitos na emergência e desenvolvimento de suas plântulas no sol e na sombra

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