Vine–host interactions

Hegarty, Elwyn E.

doi:10.1017/cbo9780511897658.015

Cited by 103 publications

(154 citation statements)

References 0 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…Consequentemente, algumas espécies de forófitos (plantas hospedeiras) possuem maior taxa de mortalidade do que árvores sem lianas (Grogan & Landis 2009). Esses efeitos negativos sobre o forófito poderiam explicar a presença de supostos caracteres defensivos das árvores contra lianas (Hegarty 1991). Hegarty (1991) cita diversas estruturas que as árvores possuem que poderiam diminuir a sua ocupação por lianas.…”

Section: Introductionunclassified

“…Esses efeitos negativos sobre o forófito poderiam explicar a presença de supostos caracteres defensivos das árvores contra lianas (Hegarty 1991). Hegarty (1991) cita diversas estruturas que as árvores possuem que poderiam diminuir a sua ocupação por lianas. Dentre essas estruturas há troncos com casca esfoliante ou lisa (Hegarty 1991).…”

Section: Introductionunclassified

“…Hegarty (1991) cita diversas estruturas que as árvores possuem que poderiam diminuir a sua ocupação por lianas. Dentre essas estruturas há troncos com casca esfoliante ou lisa (Hegarty 1991). A casca esfoliante está relacionada à perda da estabilidade no local de aderência da liana (Hegarty 1991), enquanto que as com cascas lisas possuem menos pontos de aderência para lianas, comparadas às de cascas rugosas; estas últimas conferem maior área para lianas se agarrarem (Talley et al 1996).…”

Section: Introductionunclassified

“…A arquitetura e o tamanho da árvore também podem dificultar a ocupação por lianas (Hegarty 1991). Por exemplo, sabe-se que árvores maiores tendem a ter mais lianas (Clark & Clark 1990;Ding & Zang 2009;Jiménez-Castillo & Lusk 2009;Homeier et al 2010).…”

Section: Introductionunclassified

“…Tendo em vista os efeitos negativos que as lianas exercem sobre as árvores, algumas das estruturas que as árvores possuem limitariam a sua colonização por trepadeiras lenhosas (Hegarty 1991). Dessa maneira, o objetivo do presente estudo foi responder se os seguintes caracteres das árvores estão relacionados à sua ocupação por lianas: altura total; altura do fuste em relação à altura total; tipo de casca do tronco, e índice de iluminação da copa.…”

Section: Introductionunclassified

See 4 more Smart Citations

A importância da luz na ocupação de árvores por lianas

et al. 2013

View full text Add to dashboard Cite

ResumoLianas interagem de forma negativa com as árvores, uma vez que aumentam suas taxas de mortalidade. Seria esperado, portanto, que árvores apresentassem possíveis caracteres que as defenderiam contra lianas. O objetivo desse estudo foi testar se os seguintes caracteres das árvores limitam sua infestação por lianas: 1) baixa altura; 2) tronco com ramificações altas (fuste alto); 3) casca lisa; 4) casca esfoliante, e 5) menor índice de iluminação da copa. O estudo foi realizado em um fragmento de Floresta Estacional Semidecídua no município de Alfenas (MG) no qual foi amostrado em 0,1 ha, todas as árvores com diâmetro na altura do peito maior do que 3 cm. Para cada árvore registrou-se os caracteres citados anteriormente, bem como foi estimada a porcentagem de cobertura de lianas na copa. Encontrou-se que quanto maior a altura e o índice de iluminação da copa, maior a sua ocupação por lianas. Essas árvores, apesar de atingirem o dossel da floresta e, portanto, adquirirem mais luz para crescimento e reprodução, estão também mais sujeitas à ocupação por lianas. Apesar disso, supõe-se que as árvores não investem em estruturas que poderiam diminuir a ocupação por lianas, provavelmente porque a competição com outras plantas da vizinhança pode ser também intensa. Palavras-chave: competição, comunidade vegetal, Floresta Estacional Semidecídua, trepadeira. AbstractLianas (woody climbers) interact negatively with trees, increasing their mortality rates. We expect, therefore, that trees have developed supposed traits that would defend them against lianas. The aim of this paper was test if these tree traits limit their liana occupation: 1) smaller height; 2) taller free bole height; 3) smooth bark; 4) exfoliating bark, and 5) low crown illumination. This study was carried out in a fragment of a seasonal semideciduous forest in Alfenas (Minas Gerais; Southeastern Brasil). We sampled in 0.1 ha all trees with diameter at breast height larger than 3 cm. For each tree we noted the traits previously cited, as well as we estimated the percentage of liana occupation on the tree crowns. We found that, for taller trees and trees with higher crown illumination, the probability of a tree to carry lianas was higher. These trees, in spite of reaching the forest canopy, and, therefore, acquire more light for reproduction and growth, they are also more prone to liana occupation. In spite of that, we suppose that the trees do not invest on traits that could decrease the liana occupation, probably because the competition with neighbor's plants may also be intense.

show abstract

Section: Introductionunclassified

See 3 more Smart Citations

A importância da luz na ocupação de árvores por lianas

et al. 2013

View full text Add to dashboard Cite

show abstract

Patterns of liana succession in tropical forests

Letcher

2014

Ecology of Lianas

View full text Add to dashboard Cite

116 Patterns of liana succession in tropical forests OVERVIEWLianas are particularly abundant in tropical forests and understanding the relationship between lianas and disturbance is a key step in understanding the dynamism and resilience of tropical forests systems. Lianas contribute only a small amount of the biomass in most forests, but they have disproportionate impacts on forest dynamics due to their competitive abilities and their capacity to alter forest structure. Despite the importance of lianas, our understanding of how the liana community responds to small-scale and large-scale disturbances lags behind our understanding of tree community responses.This chapter summarizes current research on liana succession and suggests directions for future study. In response to the small-scale disturbances caused by treefall gaps, lianas rapidly colonize space and can inhibit the establishment of shade-tolerant trees, altering the successional trajectory of forest patches. After large-scale land clearing and forest regrowth, lianas respond differently than do trees: liana biomass recovers to pre-disturbance levels more slowly than tree biomass, and liana species richness stays the same or declines over time in contrast to the increased species richness observed in the tree community.The extent to which lianas compete with trees and alter trajectories of secondary succession is largely unknown. The species composition of the liana community undergoes shifts during succession, and the traits of lianas that are prevalent at different points in succession suggest that lianas, like trees, occupy a continuum from small-seeded, light-demanding, fast-growing pioneer species to larger-seeded, shade-tolerant, slower-growing species characteristic of mature forest. Early successional lianas frequently have seedlings that lack a selfsupporting phase, while late successional lianas have freestanding seedlings and saplings.To fully appreciate the role of lianas during succession, comparative studies are needed from more ecoregions, particularly tropical dry forests where lianas tend to be abundant. Manipulative experiments and long-term demographic studies will also shed light on the ecology of lianas during succession. Trait-based approaches will permit a more nuanced understanding of lianas' responses to environmental variation and their impacts on trees. The conservation and appropriate management of tropical forests depend on understanding their dynamics, in which the liana community plays a vitally important role.

show abstract

Edge disturbance drives liana abundance increase and alteration of liana–host tree interactions in tropical forest fragments

Campbell

Edwards

Magrach

et al. 2018

Ecology and Evolution

View full text Add to dashboard Cite

Closed‐canopy forests are being rapidly fragmented across much of the tropical world. Determining the impacts of fragmentation on ecological processes enables better forest management and improves species‐conservation outcomes. Lianas are an integral part of tropical forests but can have detrimental and potentially complex interactions with their host trees. These effects can include reduced tree growth and fecundity, elevated tree mortality, alterations in tree‐species composition, degradation of forest succession, and a substantial decline in forest carbon storage. We examined the individual impacts of fragmentation and edge effects (0–100‐m transect from edge to forest interior) on the liana community and liana–host tree interactions in rainforests of the Atherton Tableland in north Queensland, Australia. We compared the liana and tree community, the traits of liana‐infested trees, and determinants of the rates of tree infestation within five forest fragments (23–58 ha in area) and five nearby intact‐forest sites. Fragmented forests experienced considerable disturbance‐induced degradation at their edges, resulting in a significant increase in liana abundance. This effect penetrated to significantly greater depths in forest fragments than in intact forests. The composition of the liana community in terms of climbing guilds was significantly different between fragmented and intact forests, likely because forest edges had more small‐sized trees favoring particular liana guilds which preferentially use these for climbing trellises. Sites that had higher liana abundances also exhibited higher infestation rates of trees, as did sites with the largest lianas. However, large lianas were associated with low‐disturbance forest sites. Our study shows that edge disturbance of forest fragments significantly altered the abundance and community composition of lianas and their ecological relationships with trees, with liana impacts on trees being elevated in fragments relative to intact forests. Consequently, effective control of lianas in forest fragments requires management practices which directly focus on minimizing forest edge disturbance.

show abstract

Vine–host interactions

Cited by 103 publications

References 0 publications

A importância da luz na ocupação de árvores por lianas

A importância da luz na ocupação de árvores por lianas

Patterns of liana succession in tropical forests

Edge disturbance drives liana abundance increase and alteration of liana–host tree interactions in tropical forest fragments

Contact Info

Product

Resources

About