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| Registros recuperados: 34 | |
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| DISLICH,RICARDO; KISSER,NABOR; PIVELLO,VÂNIA R.. |
| Invasões biológicas são uma ameaça à manutenção da diversidade biológica, especialmente em fragmentos de hábitat pequenos e isolados. Este trabalho reporta a invasão da Reserva Florestal da Cidade Universitária "Armando de Salles Oliveira" (23º34' S e 46º43' W), um pequeno (10 ha) fragmento florestal, por uma palmeira nativa da Austrália, através da descrição dos padrões espaciais, estrutura de tamanhos e aspectos dinâmicos de sua população. Indivíduos adultos (DAP > 25 cm) se distribuem por grande parte da Reserva. Entre as árvores com DAP > ou = 9,5 cm, em uma área de 2,1 ha, A. cunninghamiana foi a espécie com maior densidade, com 305 indivíduos (22,5% do total). A espécie esteve ausente em locais com histórico recente de perturbação antrópica,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Archontophoenix cunninghamiana; Biological invasion; Secondary forest. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000100008 |
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| Barbosa,Elizabeth Gorgone; Pivello,Vânia Regina; Meirelles,Sérgio Tadeu. |
| The aim of this study was to look for evidence of allelochemicals in B. decumbens, in parts of the plant from where they could easily be released to the environment. The germination inhibition of Phalaris canariensis, Lactuca sativa (standard species) and Melinis minutiflora, another invasive African grass, was tested using B. decumbens germinating seeds and aqueous leachates of the roots, green and senescent leaves, at 5, 10 and 20% w/v. Both the germinating seeds and the aqueous leachates of B. decumbens reduced the germination of the species tested; the effectiveness of the aqueous leachates increased according to concentration. Apparently, the competitive advantage of B. decumbens in the cerrados could be amplified via allelopathy. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Cerrado; Biological invasion; Brachiaria decumbens; Melinis minutiflora. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400021 |
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| Simone,Luiz Ricardo L.; Gonçalves,Eric Pedro. |
| The bivalve Myoforceps aristatus (Dillwyn, 1817), also known as Lithophaga aristata, have been recently collected in the coasts of Rio de Janeiro and São Paulo, Brazil; a species that bores shells of other mollusks. This occurrence has been interpreted as an invasion of this species, originally from the Caribbean. The distinguishing character of the species is the posterior extensions of the shell crossing with each other. Because specimens with this character have also been collected in the Pacific Ocean, they all have been considered a single species. However, it is possible that more than one species may be involved in such worldwide distribution. With the objective of providing full information based on Atlantic specimens, a complete anatomical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Myoforceps aristatus; Biological invasion; Boring bivalve; Brazil; Anatomy; Systematics. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492006000600001 |
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| Simone,Luiz Ricardo L.. |
| The morpho-anatomy of the micro-predator Huttonella bicolor (Hutton, 1838) is investigated in detail. The species is a micro-predator snail, which is splaying in tropical and subtropical areas all over the world, the first report being from the Amazon Rainforest region of northern Brazil. The shell is very long, with complex peristome teeth. The radula bears sharp pointed teeth. The head lacks tentacles, bearing only ommatophores. The pallial cavity lacks well-developed vessels (except for pulmonary vessel); the anus and urinary aperture are on pneumostome. The kidney is solid, with ureter totally closed (tubular); the primary ureter is straight, resembling orthurethran fashion. The buccal mass has an elongated and massive odontophore, of which muscles are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptaxidae; Carnivorous; Biological invasion; Anatomy; Systematics. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492013000300001 |
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| Sanjuan-Muñoz1,Adolfo; Bustos-Montes,Diana; Polo-Silva,Carlos Julio; Henao-Castro,Alejandro; Marrugo,Milena; Delgado-Huertas,Antonio; Vinyoles-Cartanya,Dolors; Acero P.,Arturo. |
| ABSTRACT Lionfish was studied in the mesophotic environment. 237 specimens were observed, most in the upper mesophotic zone. Males were larger than females and differences between sexes in growth models were found. Sixteen prey items were identified, the most important being the teleost families Acanthuridae and Monacanthidae, and the crustacean Penaeidae. The mean of δ13C was -17.08 ± 0.36 ‰ and δ15N was 8.68 ± 0.46 ‰, with no differences between sexes. Lionfish occupies a less extensive isotopic niche in mesophotic environment than in shallow sectors; there is an isotopic niche overlap between sexes. Likewise, lionfish has specialized trophic habits. All specimens were mature and in females regression phase predominated. In females, condition factor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trophic ecology; Reproduction; Biological invasion; Mesophotic environment; Stable isotopes. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000100075 |
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| Leivas,Peterson T.; Leivas,Fernando W. T.; Moura,Maurício O.. |
| Lithobates catesbeianus (Shaw, 1802) is an invasive anuran introduced in Brazil that is associated with the displacement and the decline of populations of native species worldwide. There is evidence that biological invasions are facilitated by certain attributes of the invading species, for instance niche breath, and that invasive species have a broader ecological niche with respect to native ones. We designed a study to ascertain the temporal, ontogenetic, and sex differences in the niche dynamics of the American bullfrog. We sampled monthly from June 2008 to May 2009 in the state of Paraná, southern Brazil. For each individual, we gathered biometric and stomach content data. We then estimated the niche breath of the juveniles and adults, and compared it... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological invasion; Bullfrog; Predation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000500003 |
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| Proença, Barbara; Romuald, Marine; Auby, Isabelle; Ganthy, Florian; Sottolichio, Aldo; Michalet, Richard. |
| Ecosystem engineering effects of dominant species on habitats and consequently on other species are likely to propagate through time at longer distance than the close neighbourhood. Such effects are important to disentangle from short-term biotic effects, especially in biological invasions, as engineering can explain changes in invasion rates over the course of the invasion. We assessed the contribution and spatial dynamics of ecosystem engineering effects of a strong invader, the cordgrass Spartina anglica, on Zostera noltei, a foundation seagrass species of muddy intertidal systems in Europe. Z. noltei transplants were grown at different positions along transects crossing intact S. anglica patches, cut patches and nearby bare sediment on tidal flats in... |
| Tipo: Text |
Palavras-chave: Biological invasion; Competition; Ecosystem engineer; Spartina anglica; Zostera noltei. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00507/61875/67507.pdf |
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| Almeida,Felipe V.M.; Santos,Jean C.; Silveira,Fernando A.O.; Fernandes,Geraldo W.. |
| The frequency of galls induced by Anisodiplosis waltheriae Maia, a recently described species, on Waltheria indica L. was studied. W. indica is an invasive weed in regeneration areas of Atlantic Forest in southeastern Brazil. Plants were collected in May 2004 and above-ground biomass, main stem length, number of leaves, number of galls per leaf and leaf area of each individual were recorded. Nearly 90% of all plants and 25% of all leaves were attacked by the gall midge, with an average of 0.67 galls/leaf. Leaf area had a weak effect on gall abundance while the number of leaves had no effect on gall abundance. Only 31% of the variation in gall abundance was explained by plant biomass. Natural enemies killed one third of the sampled galls. Predation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aimorés; Atlantic Forest; Insect gall; Herbivory; Mortality factor; Biological invasion. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000400002 |
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| Casimiro,Armando César Rodrigues; Garcia,Diego Azevedo Zoccal; Vidotto-Magnoni,Ana Paula; Britton,John Robert; Agostinho,Ângelo Antônio; Almeida,Fernanda Simões de; Orsi,Mário Luís. |
| ABSTRACT Non-native species are a major driver of biodiversity loss. Aquaculture activities play a key role in introductions, including the escape of fishes from fish farm facilities. Here, the impact of flooding due to El Niño rains in 2015/2016 in the Lower and Middle Paranapanema River basin, southern Brazil, was investigated by evaluating fish escapes from 12 fish farms. The flooding resulted in the escape of approximately 1.14 million fishes into the river, encompassing 21 species and three hybrids. Non-native species were the most abundant escapees, especially Oreochromis niloticus (Linnaeus, 1758) and Coptodon rendalli (Boulenger, 1897) (96% of all fish). Only seven native fishes were in the escapee fauna, comprising 1% of all fish. Large floods,... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Biological invasion; Climate change; Fish farming; Paraná River; Propagule pressure.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100504 |
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| Santos,Sonia Barbosa dos; Miyahira,Igor Christo; Lacerda,Luiz Eduardo Macedo de. |
| Small populations of Melanoides tuberculatus (Müller, 1774) and Biomphalaria tenagophila (d´Orbigny, 1835), were found at Vila do Abraão, being the first record of these species to Ilha Grande, Angra dos Reis, Rio de Janeiro. They were probably introduced after 2004, perhaps following release from aquaria. The possible spread of these species to other freshwater habitats in the island, their effects on native snails and links with public health are discussed. The record of M. tuberculatus appears to be the first for a Brazilian insular area. The recent introduction of these species offers a remarkable opportunity to monitor introduced species and to understand the invasion process in an insular stream in southeastern Brazil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological invasion; New records; Freshwater snails; Mollusca; Southeastern Brazil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000300037 |
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| Costa,Jaílson Penha; Mesquita,Mário Luiz Ribeiro. |
| ABSTRACT Knowledge of weed floristic composition and phytosociology are key factors for improving weed management in pastures. Information on weed species that occur in pastures in Northeast Brazil, particularly in Maranhão State is very limited. It is, therefore, important, to search for information to help farmers to control weeds in livestock farming. This paper describes the weed flora diversity and community structure parameters, including density, frequency, abundance and importance value for each weed species found in five pastures of same age and management in Maranhão State, Northeast Brazil. The weed survey was carried out using a wooden frame (80 cm x 30 cm) placed randomly on the soil surface 30 times in each pasture (n = 150). Weeds were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eragrostis ciliaris; Competition; Biological invasion; Allelopathy; Cyperus rotundus. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200414 |
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| Mesquita,Mário Luiz Ribeiro; Andrade,Leonaldo Alves de; Pereira,Walter Esfrain. |
| The objective of this study was to compare the ex situ and in situ floristic diversity of the soil weed seed bank of a rice field in northeastern Brazil. In a rice field in the county of Bacabal, located in the state of Maranhão, thirty 25-m² plots were laid out. From 15 plots, soil samples (6/plot; n = 90) were taken with a soil probe (25 × 16 × 3 cm) and placed in aluminum trays in the greenhouse. From the remaining 15 plots, weed samples (6/plot; n = 90) were taken with the same soil probe. The number of seeds was estimated by germination. We evaluated the numbers of species and individuals, as well as the density, frequency, abundance and importance value (IV) for each species. Diversity was computed by the Shannon index (H'). We recorded 13,892... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyperaceae; Competition; Biological invasion; Phytosociology; Smallholder farmers. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300001 |
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| AGUIRRE-PABÓN,J.C; OROZCO BERDUGO,G. Jr; NARVÁEZ BARANDICA,J.C. |
| The tiger shrimp (Penaeus monodon) is an Indo-Pacific species. Its global production between 1970 and 1980 exceeded all other shrimp species, which favored its introduction and cultivation outside its natural range in several countries of Africa, Europe, USA and South America. It is currently found in the coast of the Atlantic Ocean (Mexico, United States, Puerto Rico, Brazil, Guyana, Venezuela and Colombia). Despite the risk involved, no studies have been conducted to evaluate their impact as a possible invasive species and their genetic condition. This study evaluated the genetic status and population origin of P. monodon in the northernmost Colombian Caribbean, analyzing the mitochondrial DNA control region (mtDNA-CR). 16 individuals were randomly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological invasion; Caribbean Sea; Founder effect; Genetic relationships; Mitochondrial DNA. |
| Ano: 2015 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100013 |
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| Rossi,Rafael Drumond; Martins,Carlos Romero; Viana,Pedro Lage; Rodrigues,Evandro Luís; Figueira,José Eugênio Côrtes. |
| In the Cerrado Biome of Brazil, African grasses constitute a serious problem, occurring in virtually all protected areas. Molasses grass (Melinis minutiflora P. Beauv.) accumulates more biomass than do most other species of the herbaceous stratum vegetation native to the Cerrado. In this study, our aim was to determine the impact of M. minutiflora on native vegetation, as well as (using simulations of fire traits) on the characteristics of fires, in invaded areas of the Serra do Rola-Moça State Park (Parque Estadual da Serra do Rola-Moça, PESRM), a protected area where fires are frequent, in the state of Minas Gerais, Brazil. Our main results are that M. minutiflora considerably increases the amount of biomass, becoming the main combustible plant in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; BehavePlus; Biological invasion; Fire intensity; Savannah. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400018 |
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| Aerts, Raf; Ewald, Michael; Nicolas, Manuel; Piat, Jerome; Skowronek, Sandra; Lenoir, Jonathan; Hattab, Tarek; Garzon-lopez, Carol X.; Feilhauer, Hannes; Schmidtlein, Sebastian; Rocchini, Duccio; Decocq, Guillaume; Somers, Ben; Van De Kerchove, Ruben; Denef, Karolien; Honnay, Olivier. |
| Alien invasive species can affect large areas, often with wide-ranging impacts on ecosystem structure, function, and services. Prunus serotina is a widespread invader of European temperate forests, where it tends to form homogeneous stands and limits recruitment of indigenous trees. We hypotesized that invasion by P. serotina would be reflected in the nutrient contents of the native species' leaves and in the respiration of invaded plots as efficient resource uptake and changes in nutrient cycling by P. serotina probably underly its aggressive invasiveness. We combined data from 48 field plots in the forest of Compiegne, France, and data from an experiment using 96 microcosms derived from those field plots. We used general linear models to separate effects... |
| Tipo: Text |
Palavras-chave: American black cherry; Biological invasion; Biogeochemical cycles; Canopy foliar nutrients; Heterotrophic respiration; Litter; Exotic species; Invasive species. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00398/50981/51739.pdf |
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| Barbier, Edward B.. |
| This paper investigates the relationships among land-use change, biological invasion, and interspecific competition in a tropical ecosystem by linking a behavioral model of land conversion by agriculture and an ecological model of interspecific competition between a native species and an exotic invader. The model is used to examine how relative farm prices and access to forest areas influence land clearing and thus the ability of the invasive species to eliminate the native species. Simulations show that only a 20% rise in relative prices and a 2.75% increase in forest access are necessary for this outcome to occur. |
| Tipo: Journal Article |
Palavras-chave: Biological invasion; Interspecific competition; Land clearing; Tropical ecosystem; Tropical forest; O13; Q20; Q24. |
| Ano: 2007 |
URL: http://purl.umn.edu/37275 |
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| Registros recuperados: 34 | |
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