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130 results for “liana”
Legacy effects of canopy gaps on liana abundance 25 years later in a seasonal tropical evergreen forest in northeastern Thailand
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Data from: Wildlife differentially affect tree and liana regeneration in a tropical forest: an 18‐yr study of experimental terrestrial defaunation versus artificially abundant herbivores
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Data from: Environmental heterogeneity influences liana community differentiation across a Neotropical rainforest landscape
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Data from: Trees as islands: canopy ant species richness increases with the size of liana-free trees in a Neotropical forest
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Liana abundance and diversity increase with rainfall seasonality along a precipitation gradient in Panama
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Data from: Phenotypic integration in flowers of neotropical lianas: diversification of form with stasis of underlying patterns
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Data from: Long-term changes in liana loads and tree dynamics in a Malaysian forest
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Data from: Changes in tree and liana communities along a successional gradient in a tropical dry forest in south-eastern Brazil
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Data from: Long-term dynamics of liana seedlings suggest decelerating increases in liana relative abundance over time
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Climate and soil mediate the effects of liana density on forest dynamics
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Spatial autocorrelation shapes liana distribution better than topography and host tree properties in a subtropical evergreen broadleaved forest in SW China
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Data from: Size, species, and fire behavior predict tree and liana mortality from experimental burns in the Brazilian Amazon
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Fig. 3 in Rhaphiostylis minima Jongkind (Icacinaceae), a new liana species from Ivory Coast & Liberia
Fig. 3. Rhaphiostylis beninensis (Hook.f. ex Planch.) Planch. ex Benth., like Fig. 2, but also showing ovary and style in older flowers. Photograph by Bart Wursten from Boyekoli Ebale Botany 785 (BR) from Congo Kinshasa (copyright Botanic Garden Meise).
Lianas research in the Neotropics: data from 1950-2018
<p>The data presented here contains the results of our systematic review of literature on lianas (woody climbers) named LianaReview. To build this database, we searched through the Web of Science database and the other online engines Google Scholar and Scielo, using the search terms: liana*, climb* plant*, vine*, trepad* with no limitation by country or year and selected only those studies conducted in the Neotropical region (26ºN - 26ºS), from 1950 (first record 1957) to 2018.</p>
Environmental filtering and spatial processes shape the beta diversity of liana communities in a valley savanna in Southwest China
<p><b><span>Questions:</span></b> Lianas contribute substantially to diversity and function of ecosystems. What is the relative importance of environmental filtering and spatial processes on structuring liana beta diversity at taxonomic, functional and phylogenetic levels? Is there any synergy between these drivers (environmental factors and spatial distance) on shaping three dimensions of beta diversity in a savanna liana community?</p> <p><b><span>Location:</span></b> A dry-hot valley savanna in Yunnan Province, southwest China.</p> <p><b><span>Methods: </span></b>We established 30 20×20 m plots in the savanna to collect data on the distribution of 22 liana species, 19 functional traits, and plot-level soil nutrients, elevation, and slope. The relative contributions of these environmental factors and spatial distance to liana taxonomic, functional and phylogenetic dissimilarity were analyzed using multiple regression on distance matrices. We also tested which environmental factors influence the beta diversity of liana community using permutational multivariate analysis of variance.</p> <p><b><span>Results: </span></b>Both environmental and spatial distances were significantly correlated with taxonomic, functional and phylogenetic dissimilarity. Spatial distance explained more variation in taxonomic beta diversity than environmental factors. But for both nearest neighbor functional and phylogenetic distance <i><span>D</span></i><i><sub><span><span>nn</span></span></sub></i><sub><span>'</span></sub>, environment explained a relatively higher variation than space did. Moreover, the proportion explained by environmental variables was ranked in decreasing order as follows: functional <i><span>D</span></i><i><sub><span><span>nn</span></span></sub></i><sub><span>'</span></sub>, phylogenetic <i><span>D</span></i><i><sub><span><span>nn</span></span></sub></i><sub><span>'</span></sub>, and taxonomic beta diversity. We found soil pH had the highest contribution to taxonomic and functional beta diversity, while soil total nitrogen contributed most to phylogenetic beta diversity.</p> <p><b><span>Conclusions: </span></b>This study revealed that liana taxonomic, functional and phylogenetic beta diversity in the study hot-dry savanna ecosystem are affected and maintained by both environmental filtering and spatial processes. Moreover, the functional and phylogenetic diversities were more strongly subject to environmental filtering. Our study provides the information on mechanisms underlying liana diversity maintenance in savanna, which are necessary to inform conservation management in this vulnerable ecosystem. </p>
Dataset associated to "Unraveling the relative role of light and water competition between lianas and trees in tropical forests: A vegetation model analysis"
<p>This dataset includes all the codes necessary to reproduce the simulations presented in the paper "Unraveling the relative role of light and water competition between lianas and trees in tropical forests: A vegetation model analysis" published in Journal of Ecology. More precisely, it includes the version of the codes used to generate the results for the vegetation model (ED2), the analysis platform (PEcAn), as well as the meterological drivers (Drivers) and the initial conditions (IC) of the model and the priors and posterior parameter distributions.</p>
Clearcutting and selective logging have inconsistent effects on liana diversity and abundance but not on liana–tree interaction networks
<p class="MsoNoSpacing">Understanding the effects of forest management on lianas and their interaction with trees is an important step towards effective forest management. Our study therefore aimed at quantifying the patterns of liana diversity and abundance, and liana-tree interaction network structure in response to logging disturbance in a moist semi-deciduous forest in Ghana. We sampled lianas (diameter at 1.3 m ≥ 1 cm) and their host trees (diameter at breast height ≥ 5 cm) in 90 20 × 20 m plots among three forest management regimes: clearcut-logged, selectively-logged and old-growth forests. Liana species diversity and abundance in the selectively-logged forest was similar to that of the old-growth forest, while that in clearcut-logged forest was significantly lower than both above-mentioned forest types. Liana-tree interaction networks showed anti-nested structure, which is a form of nonrandom community organization. There were significant modularity and degree of specialization, but no significant connectance in the network structure. Largely, most of the species were peripherals, while a few species acted as structurally important species (i.e. module hubs, network hubs and connectors) in the three networks. A different set of species acted as structurally important species in the different forest management regimes. Our findings call for a re-examination of clearcutting logging in forest management in view of its negative effects on lianas, and we recommend prioritizing important modules in liana-tree network for future conservation.</p>
Data from: Physiological regulation and efficient xylem water transport regulate diurnal water and carbon balances of tropical lianas
Tropical lianas deploy most of their leaves towards the top of the forest canopy, whereas trees exhibit a more stratified crown. Forest canopies are often exposed to hot and windy conditions, and how lianas cope with the extremely high transpirational demands under these environments remains unknown. We investigated stem hydraulic properties, leaf drought tolerance, diurnal changes in leaf and stem water potentials (Ψleaf and Ψstem), stomatal conductance (gs), photosynthetic rate, sap flow and stem native percentage loss of conductivity (PLC) for four liana species in a tropical forest in southwest China. Five co-occurring tree species were also selected for comparison. Lianas reached maximal transpiration at a relatively lower vapour pressure deficit (<1 kPa) than did co-occurring trees, suggesting vigorous photosynthesis during the morning. However, liana gs declined markedly over the day, with low gs at midday and afternoon. Lianas generally had higher stem sapwood-specific conductivity and maximum sap flux density but were less tolerant to drought-induced cavitation than were evergreen trees. Both lianas and trees lost leaf turgor in the top canopy at midday, but lianas lost leaf turgor earlier (∼2 h) than trees. Seven of eight species exhibited midday increases in PLC when xylem tensions were released to −0·3 to −0·5 MPa for PLC measurements. On average, lianas experienced high PLC (35·9%), along with a greater degree of disequilibrium between leaf and stem water potentials than trees (ΔΨstem–leaf: 1·37 MPa vs. 0·75 MPa) during the day. Earlier stomatal closure and efficient water transport may help lianas maintain higher Ψstem than trees despite having similar Ψleaf. Our results provide evidence that physiological regulation and efficient water transport mediate daily water relations in tropical lianas and may explain how lianas operate efficiently in tropical seasonal forests. Further studies involving a broader range of species are needed to confirm our findings.
Data from: The negative effect of lianas on tree growth varies with tree species and season
<p>Lianas reduce tree growth, reproduction, and survival in tropical forests. Liana competition can be particularly intense in isolated forest fragments, where liana densities are high, and thus host tree infestation is common. Furthermore, lianas appear to grow particularly well during seasonal drought, when they may compete particularly intensely with trees. Few studies, however, have experimentally quantified the seasonal effects of liana competition on multiple tree species in tropical forests. We used a liana-removal experiment in a forest fragment in southeastern Brazil to test whether the effects of lianas on tree growth varies with season and tree species identity. We conducted monthly diameter measurements using dendrometer bands on 88 individuals of five tree species for 24 months. We found that lianas had a stronger negative effect on some tree species during the wet season compared to the dry season. Furthermore, lianas significantly reduced the diameter growth of two tree species but had no effect on the other three tree species. The strong negative effect of lianas on some trees, particularly during the wet season, indicates that the effect of lianas on trees varies both seasonally and with tree species identity.</p>
Linkages among stem xylem transport, biomechanics and storage in lianas and trees across three contrasting environments
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