How does a Psittacanthus robustus Mart. population structure relate to a Vochysia thyrsoidea Pohl. host population?

Teodoro, Grazielle Sales; Berg, Eduardo van den; Santos, Marcela de Castro Nunes; Coelho, Flávia de Freitas

doi:10.1016/j.flora.2010.04.013

Cited by 16 publications

(30 citation statements)

References 24 publications

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“…The ILEANA ARCE-ACOSTA ET AL. aggregated spatial arrangement can be found in other Psittacanthus species like P. robustus in South East Brazil, (Ferreira-Monteiro et al, 1998;Sales-Teodoro et al, 2010), P. biternatus, P. plagiophyllus and P. eucalyptifolius in North Brazil (Fadini and Lima, 2012).…”

Section: Spatial Aggregation and Association Of Psittacanthus Calyculmentioning

confidence: 93%

“…According to Sales-Teodoro et al (2010), host distribution and behavioral patterns of seed dispersers are directly responsible of mistletoe distribution patterns. Vectors are attracted by the presence of mistletoe increasing the parasite aggregation, then a group of mistletoes with different origins could share the same host, subsequently increasing the visibility to other birds (Larson, 1996;Medel et al, 2004), reinforcing a spatial mistletoe-disperser interaction cycle, whereby infected trees receive an escalating number of seeds (Overton, 1994).…”

Section: Spatial Aggregation and Association Of Psittacanthus Calyculmentioning

confidence: 99%

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Biotic factors associated with the spatial distribution of the mistletoe Psittacanthus calyculatus in a tropical deciduous forest of central Mexico

2016

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Abstract:Psittacanthus calyculatus (Loranthaceae) is a neotropical hemiparasitic mistletoe and one of the most abundant and widely distributed species of the genus. Like most mistletoes, the interaction with its hosts and dispersers are directly related with its distribution and community dynamics. For the last decade, the infested areas in central México have increased, becoming a potential plant health problem. The aim of this study was to investigate three main biotic factors associated with the distribution of P. calyculatus in a tropical deciduous forest: (1) the plant community structure, (2) the host spatial distribution and level of association with P. calyculatus, and (3) bird consumers. Modified Whittaker plots were used to analyze the structure and composition of the plant community, comparing a highly infected mistletoe sites with non-infected sites. The spatial distribution and association of P. calyculatus with its most frequent hosts were calculated through a spatial analysis by distance indices. Study sites differed in plant diversity and species composition, showing a positive relation of mistletoe abundance with low diversity sites. The distance indices analysis presented a clumped distribution of P. calyculatus and Acacia hosts, as well as a high association with leguminous species such as A. farnesiana (X = 0.31, P = 0.0041) and A. schaffneri (X = 0.3977, P = 0.001). Three species consumed P. calyculatus' berries: the Northern mockingbird, the Silky-Flycatcher and the Scott's Oriole. Keywords: dispersers, distance indices, host association, Psittacanthus calyculatus, spatial distribution.Resumen: Psittacanthus calyculatus (Loranthaceae) es un hemiparásito neotropical y uno de los más abundantes y con mayor distribución del género. Como la mayoría de los muérdagos, las interacciones con sus hospederos y dispersores están directamente relacionadas con su distribución y dinámica en la comunidad. En la última década las áreas infectadas se han incrementado, llegando a ser un problema potencial de salud forestal. Los objetivos de este estudio fueron investigar los tres factores bióticos principales asociados a la distribución de P. calyculatus en un bosque tropical caducifolio en la periferia de la ciudad de Querétaro: (1) la estructura de la comunidad vegetal, (2) la distribución espacial y el nivel de asociación de P. calyculatus para con sus hospederos y (3) las aves que consumen los frutos del muérdago Para analizar la estructura y composición de la comunidad vegetal, se comparó un área sin muérdago con un área con numerosos individuos de P. calyculatus con la ayuda de cuadrantes Whittaker. La distribución espacial y los valores de asociación fueron calculados mediante un análisis espacial por índices de distancia. Los sitios difirieron en composición de especies, mostrando una relación entre el muérdago y la importancia de sus hospederos en la comunidad. Se establecieron puntos de observación para registrar a las aves que se alimentaran de los frutos del muérdago. Se observó una distribución ...

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Section: Spatial Aggregation and Association Of Psittacanthus Calyculmentioning

confidence: 93%

Section: Spatial Aggregation and Association Of Psittacanthus Calyculmentioning

confidence: 99%

Biotic factors associated with the spatial distribution of the mistletoe Psittacanthus calyculatus in a tropical deciduous forest of central Mexico

2016

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“…in the Brazilian Cerrado (Monteiro et al 1992). Tersina viridis (Th raupidae) was the primary seed disperser of this species, and it seems to drop or defecate mistletoe seeds preferentially in common trees of the Vochysiaceae family (Monteiro et al 1992;Teodoro et al 2010). However, birds may not deposit seeds preferentially on the most common hosts when alternative host …”

Section: Mistletoe-host Interactionsmentioning

confidence: 98%

“…In some species of hemiparasite, the extinction process is dynamic, such as for Psittacanthus robustus, a hemiparasite that mainly colonizes species of Vochysiaceae in Brazilian savannas (Monteiro et al 1992;Teodoro et al 2010). A study conducted in three areas of Brazilian rock-outcrop savannas (cerrado rupestre), in Minas Gerais State, showed that Vochysia thyrsoidea Pohl (Vochysiaceae) is the main host species for P. robustus.…”

Section: Mistletoes As Models For Testing Ecological Theory: the Metamentioning

confidence: 99%

Ecology of neotropical mistletoes: an important canopy-dwelling component of Brazilian ecosystems

et al. 2012

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Ecology of neotropical mistletoes: an important canopy-dwelling component of Brazilian ecosystems RESUMO (Ecologia de ervas-de-passarinho Neotropicais: um importante componente do dossel de ecossistemas brasileiros). Ervas-de-passarinho têm sim sido regularmente estudadas em países temperados por afetar negativamente espécies cultivadas e fl orestas manejadas. Em comparação com ambientes temperados pouco se conhece sobre a ecologia das ervas-de-passarinho neotropicais. Desta forma, é necessário maior conhecimento sobre o grupo porque são importantes elementos de comunidades vegetais, atuando como recurso-chave para polinizadores, dispersores de sementes e herbívoros. Através de uma combinação de trabalhos clássicos já publicados com evidências empíricas recentes, nós apresentamos padrões emergentes da interação entre ervas-de-passarinho com os organismos associados e questionamentos para estudos adicionais. Existe um crescente interesse neste grupo no Brasil. E embora existam informações sobre dispersão de sementes, estudos sobre biologia reprodutiva são raros e representam um campo a ser explorado. O conhecimento da biologia básica das ervas-de-passarinho será relevante para modelar sua distribuição espacial usando uma abordagem metapopulacional ou epidemiológica. Nesta revisão nós sumarizamos os principais estudos conduzidos na região Neotropical para fornecer um panorama atual das pesquisas desenvolvidas, bem como novas ideias para futuras investigações, especialmente no Brasil. Palavras ABSTRACT(Ecology of neotropical mistletoes: an important canopy-dwelling component of Brazilian ecosystems). Mistletoes have been studied in temperate countries regularly because they can be pests of cultivated plants and forest plantations. In comparison with temperate habitats, little is known about the ecology of mistletoes in the Neotropics. More emphasis should be given to neotropical mistletoes because they could be important elements of plant communities, acting as key resources for pollinators, seed dispersers and herbivores. Using a combination of fi ndings from early mistletoe studies and empirical evidence from several recent case studies, we report emerging patterns of mistletoe interactions with associated organisms and propose aims for further studies. Th ere has been increasing interest in working with mistletoes in Brazil. Although there are some data on the ecology of mistletoe seed dispersal, reproductive biology studies are scarce and represent a wide range of fi eldwork to be explored. Knowledge of the basic biology of mistletoes will be very important for modeling their spatial distribution using metapopulation or epidemiological approaches. In this review, we summarize the studies conducted in the neotropical region in order to provide a framework for current research and new ideas for future investigations of mistletoes, especially in Brazil. Revisão / ReviewActa bot. bras. 26(2): 264-274. 2012.Ecology of neotropical mistletoes: an important canopy-dwelling component of Brazilian ecosystems

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“…(Arruda et al 2006;Mourão et al 2006) and Psittacanthus spp. Teodoro et al 2010), or by intercepting the phloem, as in the case of Tristerix spp. (Martínez del Rio et al 1995;Medel et al 2002)-it can have harmful eff ects on the host, sometimes even causing the death of the parasitized individual.…”

Section: Short Communicationmentioning

confidence: 99%

Two mistletoes are too many?: Interspecific occurrence of mistletoes on the same host tree

et al. 2013

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Mistletoe can have a major impact on the fi tness of the host plant. If there is more than one species of mistletoe on the same host tree, the overall impact might be amplifi ed. We report the occurrence of more than one species of mistletoe on the same host tree. Although it is not a rule in the fi eld, to our knowledge, there have been no studies of this topic. In most cases, two species of mistletoe were recorded on the same host tree, although we recorded three species of mistletoe on one occasion. Th is demonstrates that diff erent species of mistletoe can be compatible with the same host species. Th erefore, compatibility (structural and physiological) might be an important factor for the occurrence of mistletoe. Recent studies have shown that if the mistletoe does not "recognize" the host species, the deposited seeds will germinate but the haustorium will not penetrate the host branch. Th is is probably the primary mechanism in the establishment of more than one species of mistletoe on the same host, which can trigger a cascade of harmful eff ects for the host species.

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How does a Psittacanthus robustus Mart. population structure relate to a Vochysia thyrsoidea Pohl. host population?

Cited by 16 publications

References 24 publications

Biotic factors associated with the spatial distribution of the mistletoe Psittacanthus calyculatus in a tropical deciduous forest of central Mexico

Biotic factors associated with the spatial distribution of the mistletoe Psittacanthus calyculatus in a tropical deciduous forest of central Mexico

Ecology of neotropical mistletoes: an important canopy-dwelling component of Brazilian ecosystems

Two mistletoes are too many?: Interspecific occurrence of mistletoes on the same host tree

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