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Full-Text Articles in Biology
Lianas Decelerate Tropical Forest Thinning During Succession, Jose A. Medina-Vega, Geertje M. F. Van Der Heijden, Stefan A. Schnitzer
Lianas Decelerate Tropical Forest Thinning During Succession, Jose A. Medina-Vega, Geertje M. F. Van Der Heijden, Stefan A. Schnitzer
Biological Sciences Faculty Research and Publications
The well-established pattern of forest thinning during succession predicts an increase in mean tree biomass with decreasing tree density. The forest thinning pattern is commonly assumed to be driven solely by tree-tree competition. The presence of non-tree competitors could alter thinning trajectories, thus altering the rate of forest succession and carbon uptake. We used a large-scale liana removal experiment over 7 years in a 60- to 70-year-old Panamanian forest to test the hypothesis that lianas reduce the rate of forest thinning during succession. We found that lianas slowed forest thinning by reducing tree growth, not by altering tree recruitment or …
Lianas Significantly Reduce Aboveground And Belowground Carbon Storage: A Virtual Removal Experiment, Sergio Estrada-Villegas, Sara Sofia Pedraza Navaez, Adriana Sanchez, Stefan A. Schnitzer
Lianas Significantly Reduce Aboveground And Belowground Carbon Storage: A Virtual Removal Experiment, Sergio Estrada-Villegas, Sara Sofia Pedraza Navaez, Adriana Sanchez, Stefan A. Schnitzer
Biological Sciences Faculty Research and Publications
Lianas are a quintessential tropical plant growth-form; they are speciose and abundant in tropical forests worldwide. Lianas compete intensely with trees, reducing nearly all aspects of tree performance. However, the negative effects of lianas on trees have never been combined and quantified for multiple tropical forests. Here, we present the first comprehensive standardized quantification of the effect of lianas on trees across tropical forests worldwide. We used data from 50 liana removal experiments and quantified the effect size of lianas on tree growth, biomass accretion, reproduction, mortality, leaf water potential, sap flow velocity, and leaf area index (LAI) across different …
Can Functional Traits Explain Plant Coexistence? A Case Study With Tropical Lianas And Trees, Felipe N. A. Mello, Sergio Estrada Villegas, David M. Defilippis, Stefan A. Schnitzer
Can Functional Traits Explain Plant Coexistence? A Case Study With Tropical Lianas And Trees, Felipe N. A. Mello, Sergio Estrada Villegas, David M. Defilippis, Stefan A. Schnitzer
Biological Sciences Faculty Research and Publications
Organisms are adapted to their environment through a suite of anatomical, morphological, and physiological traits. These functional traits are commonly thought to determine an organism’s tolerance to environmental conditions. However, the differences in functional traits among co-occurring species, and whether trait differences mediate competition and coexistence is still poorly understood. Here we review studies comparing functional traits in two co-occurring tropical woody plant guilds, lianas and trees, to understand whether competing plant guilds differ in functional traits and how these differences may help to explain tropical woody plant coexistence. We examined 36 separate studies that compared a total of 140 …
A Comprehensive Synthesis Of Liana Removal Experiments In Tropical Forests, Sergio Estrada-Villegas, Stefan A. Schnitzer
A Comprehensive Synthesis Of Liana Removal Experiments In Tropical Forests, Sergio Estrada-Villegas, Stefan A. Schnitzer
Biological Sciences Faculty Research and Publications
Lianas are a quintessential feature of tropical forests and are often perceived as being poorly studied. However, liana removal studies may be one of the most common experimental manipulations in tropical forest ecology. In this review, we synthesize data from 64 tropical liana removal experiments conducted over the past 90 yr. We explore the direction and magnitude of the effects of lianas on tree establishment, growth, survival, reproduction, biomass accretion, and plant and animal diversity in ecological and forestry studies. We discuss the geographical biases of liana removal studies and compare the various methods used to manipulate lianas. Overall, we …
Blurred Lines Between Competition And Parasitism, Tara E. Stewart, Stefan A. Schnitzer
Blurred Lines Between Competition And Parasitism, Tara E. Stewart, Stefan A. Schnitzer
Biological Sciences Faculty Research and Publications
Accurately describing the ecological relationships between species is more than mere semantics-doing so has profound practical and applied implications, not the least of which is that inaccurate descriptions can lead to fundamentally incorrect predicted outcomes of community composition and functioning. Accurate ecological classifications are particularly important in the context of global change, where species interactions can change rapidly following shifts in species composition. Here, we argue that many common ecological interactions-particularly competition and parasitism-can be easily confused and that we often lack empirical evidence for the full reciprocal interaction among species. To make our case and to propose a theoretical …
Contribution Of Lianas To Plant Area Index And Canopy Structure In A Panamanian Forest, M. Elizabeth Rodríguez-Ronderos, Gil Bohrer, Arturo Sanchez-Azofeifa, Jennifer S. Powers, Stefan A. Schnitzer
Contribution Of Lianas To Plant Area Index And Canopy Structure In A Panamanian Forest, M. Elizabeth Rodríguez-Ronderos, Gil Bohrer, Arturo Sanchez-Azofeifa, Jennifer S. Powers, Stefan A. Schnitzer
Biological Sciences Faculty Research and Publications
Lianas are an important component of tropical forests, where they reduce tree growth, fecundity, and survival. Competition for light from lianas may be intense; however, the amount of light that lianas intercept is poorly understood. We used a large-scale liana-removal experiment to quantify light interception by lianas in a Panamanian secondary forest. We measured the change in plant area index (PAI) and forest structure before and after cutting lianas (for 4 yr) in eight 80 m × 80 m plots and eight control plots (16 plots total). We used ground-based LiDAR to measure the 3-dimensional canopy structure before cutting lianas, …