Potencial for natural forest regeneration from seed bank in an upper Paraná river floodplain, Brazil

Campos, Joana; Souza, Maria Conceição de

doi:10.1590/s1516-89132003000400018

Cited by 28 publications

(18 citation statements)

References 16 publications

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“…Assim, a regeneração e crescimento de plantas estão relacionados com a chuva de sementes, sendo determinada pela produção e densidade da chuva de sementes e pela dinâmica do banco de sementes no solo (SIMPSON, 1989). A dispersão pela chuva de sementes é considerada a fase inicial na organização da dinâmica de florestas (HARDESTY; PARKER, 2002), permitindo que os indivíduos mortos sejam substituídos por espécies que se encontram no banco de sementes e de plântulas no solo SOUZA, 2003). Entretanto, o tamanho do fragmento, bem como a distância entre os fragmentos, pode influenciar a disponibilidade de sementes (TERBORGH, 1986), levando a mudanças na composição da chuva de sementes (FREITAS et al, 2013).…”

Section: Introductionunclassified

Banco E Chuva De Sementes Em Área De Transição Florestal No Sul Do Brasil1

2015

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RESUMO -O banco e chuva de sementes podem ser indicadores utilizados para avaliar o potencial de recuperação de uma área que sofre influência antrópica. Assim, os objetivos deste trabalho foram quantificar o número de sementes viáveis e estimar a diversidade de espécies do banco e chuva de sementes, a fim de conhecer o potencial de recuperação de uma área inserida em uma matriz agrícola. Foram instalados 40 coletores para avaliar a chuva de sementes, bem como coletadas amostras de solo, para caracterizar o banco de sementes. Na chuva de sementes, foram encontradas 2.079 sementes, pertencentes a 43 espécies, sendo as famílias Lauraceae e Fabaceae as mais representativas. No banco de sementes, germinaram 69 indivíduos pertencentes a 23 espécies, sendo a família Asteraceae a mais representativa. Observou-se elevada diversidade de espécies na chuva de sementes (H'= 2,34 nats ind -1 ), em que as sementes das espécies secundárias tardias foram as mais abundantes, enquanto no banco de sementes, as espécies pioneiras. Em conclusão, o fragmento florestal encontrava-se em estágio sucessional avançado, o que pode garantir estabilidade ao sistema diante da influência antrópica.Palavras-chave: Matriz agrícola; Estratégia de regeneração; Propágulos. SEED BANK AND SEED RAIN IN A TRANSITIONAL FOREST AREA IN THE SOUTH OF BRAZILABSTRACT -The seed bank and seed rain can be used as indicators to evaluate the recovery potential of an anthropic area. Our aims were quantify the number of viable seeds and estimate species diversity of bank and seed rain to assess the recovery potential of an area surrounded by agriculture. We installed 40 collectors to evaluate seed rain and collected soil samples for seed bank quantifications. We found 2,079 seeds in seed rain, comprising 43 species, being Lauraceae and Fabaceae the most abundant families. Seed bank was represented by 69 seeds of 23 species, predominating Asteraceae family. We observed high species diversity in seed rain (H'= 2.34 nats ind -1 ). Secondary species predominated in seed rain, while pioneer species in seed bank. In conclusion, forested area is in an advanced successional stage indicating a potential capacity of system under anthropogenic pressures.

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Section: Introductionunclassified

Banco E Chuva De Sementes Em Área De Transição Florestal No Sul Do Brasil1

2015

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“…Floristic surveys of the riparian forests indicate that the region is characterized by a low diversity of arboreal forests (SOUZA et al 2004). Human disturbance to these environments is severe since the 1960's (CAMPOS & SOUZA 2003). Following the creation of the "Federal Area for Environmental Protection of the Islands and Flood Plains of the Paraná River" in 1997 (decree without number of September 30, 1997), the human populations living along the river banks were relocated and the neighboring pastures and plantations were purchased.…”

Section: Study Areamentioning

confidence: 99%

“…This species also has been causing environmental problems in Brazil and in other South American countries such as Chile and Argentina (JAKSIC et al 2002, MOURA-BRITTO & PATROCÍNIO 2006. In addition, feral beasts also generate another environmental problem to natural habitats: the frequent stomping can interfere directly on the quality of the forests, preventing the recruitment of natural plants (CAMPOS & SOUZA 2003). In some islands in the region of Porto Rico (e.g.…”

Section: Perspectives For Conservationmentioning

confidence: 99%

Occurrence, local extinction and conservation of Primates in the corridor of the Upper Paraná River, with notes on other mammals

et al. 2007

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The region of Porto Rico, on the Upper Paraná River, is a contact zone between the Atlantic Rainforest and the Cerrado, with elements of the Pantanal wetlands. During surveys from September 2003 to September to 2005, we recorded the presence of non-volant mammals on 14 islands and the adjacent riverbanks. Surveys were by foot and by boat, and we also interviewed local people about the mammals of the region. Sightings of three primate species - Cebus nigritus (Goldfuss, 1809) (left margin of the river), C. libidinosus Spix, 1823 (right margin) and Alouatta caraya (Humboldt, 1812) (both margins and 12 islands) - were plotted on a satellite image. Alouatta clamitans Cabrera, 1940 was not recorded. However, interviews indicated that this species has occurred in this region in the past. The survey of mammals revealed the occurrence of 32 native species, a native genus with one or more unidentified species, and two introduced species [Lepus europaeus Pallas, 1778 and Sus scrofa (Linnaeus, 1758)]. The study discusses the permeability of the Paraná River to dispersal, as well as its potential as a geographical barrier to some species. Hypothesis on the local extinction of A. clamitans is also addressed. This study provides information that can be useful for promoting the conservation of this region.

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“…A entrada desses elementos influencia o processo de regeneração natural da vegetação, com consequência no fechamento de clareiras e, até mesmo, na regeneração de áreas degradadas (CLARK;POULSEN, 2001;GROMBONE-GUARATINI;RODRIGUES, 2002;SOUZA, 2003).…”

Section: Introductionunclassified