Invasion of Alien Plants in the Caatinga Biome

Cavalcante, Arnóbio de Mendonça Barreto; Major, István

doi:10.1579/0044-7447(2006)35[141:ioapit]2.0.co;2

Cited by 15 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The tree Calotropis gigantea R.Br. (Crown flower) is described as ''the most aggressive phytoinvader'' in the Caatinga biome of Brazil (Cavalcante and Major 2006).…”

Section: Alien Plant Invasions In Neotropical Savannasmentioning

confidence: 99%

Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects

et al. 2010

View full text Add to dashboard Cite

Biological invasions affect virtually all ecosystems on earth, but the degree to which different regions and biomes are invaded, and the quality of information from different regions, varies greatly. A large body of literature exists on the invasion of savannas in the Neotropics and northern Australia where invasive plants, especially African grasses, have had major impacts. Less has been published on plant invasions in African savannas, except for those in South Africa. Negative impacts due to plant invasions in African savannas appear to be less severe than in other regions at present. As savannas cover about 60% of the continent, with tens of millions of people relying on the services they provide, it is timely to assess the current status of invasions as a threat to these ecosystems. We reviewed the literature, contrasting the African situation with that of Neotropical and Australian savannas. A number of drivers and explanatory factors of plant invasions in savannas have been described, mostly from the Neotropics and Australia. These include herbivore presence, residence time, intentional introductions for pasture improvements, fire regimes, the physiology of the introduced species, and anthropogenic disturbance. After comparing these drivers across the three regions, we suggest that the lower extent of alien plant invasions in African savannas is largely attributable to: (1) significantly lower rates of intentional plant introductions and widespread plantings (until recently); (2) the role of large mammalian herbivores in these ecosystems; (3) historical and biogeographical issues relating to the regions of origin of introduced species; and (4) the adaptation of African systems to fire. We discuss how changing conditions in the three regions are likely to affect plant invasions in the future.

show abstract

“…The tree Calotropis gigantea R.Br. (Crown flower) is described as ''the most aggressive phytoinvader'' in the Caatinga biome of Brazil (Cavalcante and Major 2006).…”

Section: Alien Plant Invasions In Neotropical Savannasmentioning

confidence: 99%

Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects

et al. 2010

View full text Add to dashboard Cite

show abstract

“…In figs, the arrival of fig wasps has resulted in the production of seeds and invasive spread of some species of fig (Nadel et al, 1992). Should an appropriate pollinator for C. gigantea arrive in Hawai'i, it could become invasive, as it is recognized as invasive elsewhere (Keigh & Longman, 2004;Cavalcante & Major, 2006;D. Eisikowitch pers.…”

Section: Discussionmentioning

confidence: 99%

Sterility and lack of pollinator services explain reproductive failure in non‐invasive ornamental plants

Bufford

Daehler

2014

Diversity and Distributions

View full text Add to dashboard Cite

Aim Mutualisms, including pollination, have been hypothesized to influence establishment and success of introduced species. However, lack of pollinators has rarely been demonstrated as a barrier to plant invasion. We examined barriers to seed set in nine introduced non‐invasive tropical ornamental plants which do not regularly produce seeds in Hawai'i. Location Hawai'i. Methods We tested for pollen viability using 1% thiazolyl blue tetrazolium bromide (MTT) stain. We also supplementally hand‐pollinated flowers and examined subsequent fruit set. Results We found that four species had non‐viable pollen, as measured by pollen staining, and failed to produce seeds. By contrast, the milkweed Calotropis gigantea, though invasive elsewhere, produced seeds only when hand‐pollinated, indicating that natural seed set is prevented by lack of legitimate pollen deposition. The remaining four species apparently had viable pollen, but did not set seed when hand‐pollinated. Seed set in these species may be limited by lack of compatible mates in Hawai'i. Main conclusions Lack of seed production due to pollen sterility or lack of compatible pollen can function as an early barrier to invasion success in ornamental plants, helping to explain why some ornamental species fail to invade. Additionally, we document one of the first concrete examples of a lack of pollinator services inhibiting invasion success in a species outside of the genus Ficus. Understanding the nature of early barriers to invasion can help us evaluate the future invasion risks posed by these species in Hawai'i and elsewhere.

show abstract

“…A flora da Caatinga é composta por 4.478 espécies [1] e se caracteriza por apresentar uma alta variedade fisionômica e uma grande diversidade de espécies endêmicas [2]. Apesar desta alta diversidade de espécies, as fitofisionomias da Caatinga encontram-se fortemente degradadas [3,4]. Esta degradação tem promovido a diminuição da riqueza e diversidade de espécies nativas, além de ocasionar a redução das funções ecológicas, podendo atuar como um facilitador para o processo de invasão biológica [5,6,7].…”

Section: Introductionunclassified

Impactos da exótica invasora Boerhavia diffusa L. sobre a diversidade de espécies do estrato herbáceo e arbustivo autóctone de uma área ripária na Caatinga, Sergipe, Brasil

Santos

Fabricante

2019

Sci. Plena

View full text Add to dashboard Cite

Nosso objetivo foi estudar os impactos causados pela espécie exótica invasora Boerhavia diffusa sobre o estrato herbáceo e arbustivo em uma área ripária de Caatinga em Canindé de São Francisco, SE. Para isso, utilizamos o método de parcelas e amostramos dois ambientes nos quais todas as espécies herbáceas foram contabilizadas e estimados os parâmetros estruturais das comunidades. Amostramos 13 espécies e 513 indivíduos no ambiente invadido e 36 espécies e 1.056 indivíduos no ambiente não invadido. A diversidade de espécies baseada no índice de Shannon-Wiener (H’) foi de 1,69 para o ambiente invadido e de 2,63 para o ambiente não invadido. Nossos resultados sugerem que Boerhavia diffusa afeta de maneira negativa a diversidade de espécies do estrato herbáceo e arbustivo autóctone da área estudada.

show abstract

Invasion of Alien Plants in the Caatinga Biome

Cited by 15 publications

References 0 publications

Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects

Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects

Sterility and lack of pollinator services explain reproductive failure in non‐invasive ornamental plants

Impactos da exótica invasora Boerhavia diffusa L. sobre a diversidade de espécies do estrato herbáceo e arbustivo autóctone de uma área ripária na Caatinga, Sergipe, Brasil

Contact Info

Product

Resources

About