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336 results for “Lobelia”
Lobelia spicata (Campanulaceae) - leaf - margin of upper + lower surface
Image of Lobelia spicata (Campanulaceae) - leaf - margin of upper + lower surface
Lobelia spicata (Campanulaceae) - inflorescence - frontal view of flower
Image of Lobelia spicata (Campanulaceae) - inflorescence - frontal view of flower
Lobelia spicata (Campanulaceae) - leaf - on upper stem
Image of Lobelia spicata (Campanulaceae) - leaf - on upper stem
Lobelia spicata (Campanulaceae) - whole plant - in flower - general view
Image of Lobelia spicata (Campanulaceae) - whole plant - in flower - general view
Lobelia spicata (Campanulaceae) - stem - showing leaf bases
Image of Lobelia spicata (Campanulaceae) - stem - showing leaf bases
Linked collectors and determiners for: Nomenclatural and taxonomic survey of the South American clade of Lobelia section Rhynchopetalum (Campanulaceae).
Natural history specimen data linked to collectors and determiners held within, "Nomenclatural and taxonomic survey of the South American clade of Lobelia section Rhynchopetalum (Campanulaceae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/5da1e4a5-6df1-489e-bc98-dbb156d3d2a1">https://bionomia.net/dataset/5da1e4a5-6df1-489e-bc98-dbb156d3d2a1</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/5da1e4a5-6df1-489e-bc98-dbb156d3d2a1">https://gbif.org/dataset/5da1e4a5-6df1-489e-bc98-dbb156d3d2a1</a>. Formatted as a Frictionless Data package.
Simulated pollinator decline has similar effects on seed production of female and hermaphrodite Lobelia siphilitica, but different effects on selection on floral traits
<p><span>PREMISE:</span><span> Pollinator decline, by reducing seed production, is predicted to strengthen natural selection on floral traits. However, the effect of pollinator decline on gender dimorphic species (such as gynodioecious species, where plants produce female or hermaphrodite flowers) may differ between the sex morphs: if pollinator decline reduces the seed production of females more than hermaphrodites, then it should also have a larger effect on selection on floral traits in females than in hermaphrodites.</span></p> <p><span>RESULTS: </span><span>Experimentally reducing pollination decreased seed production of both females and hermaphrodites by ~21%. Reducing pollination also strengthened selection on floral traits, but this effect was not larger in females than in hermaphrodites. Instead, reducing pollination intensified selection for taller inflorescences in hermaphrodites, but did not intensify selection on any floral trait in females.</span></p> <p><span>CONCLUSIONS:</span><span> Our results suggest that pollinator decline will not have a larger effect on either seed production or selection on floral traits of female plants. As such, any effect of pollinator decline on seed production may be similar for gender dimorphic and monomorphic species. However, the potential for floral traits of females (and thus of gender dimorphic species) to evolve in response to pollinator decline could be limited.</span></p>
Simulated pollinator decline has similar effects on seed production of female and hermaphrodite Lobelia siphilitica, but different effects on selection on floral traits
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Lobelia cardinalis (Campanulaceae) - whole plant - in flower - general view
Image of Lobelia cardinalis (Campanulaceae) - whole plant - in flower - general view
Genotype-environment interaction and the maintenance of genetic variation: an empirical study of Lobelia inflata (Campanulaceae)
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Data from: Physiological effects of temperature do not explain prevalence of females in populations of gynodioecious Lobelia siphilitica growing in warmer climates
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North Temperate Lakes site, station Trout Lake, study of plant biomass of Lobelia dortmanna in units of gramsPerSquareMeter on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains plant biomass of Lobelia dortmanna measurements in gramsPerSquareMeter units and were aggregated to a yearly timescale.
Cedar Creek Ecosystem Science Reserve site, station Old Field 70 at Cedar Creek, study of plant biomass of Lobelia spicata in units of gramsPerSquareMeter on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Cedar Creek Ecosystem Science Reserve (CDR) contains plant biomass of Lobelia spicata measurements in gramsPerSquareMeter units and were aggregated to a yearly timescale.
Cedar Creek Ecosystem Science Reserve site, station Old Field LS at Cedar Creek, study of plant biomass of Lobelia spicata in units of gramsPerSquareMeter on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Cedar Creek Ecosystem Science Reserve (CDR) contains plant biomass of Lobelia spicata measurements in gramsPerSquareMeter units and were aggregated to a yearly timescale.
Data from: Beyond balancing selection: frequent mitochondrial recombination contributes to high female frequencies in gynodioecious Lobelia siphilitica L. (Campanulaceae)
(1) Gynodioecy is a sexual system where females and hermaphrodites co-occur. In most gynodioecious angiosperms, sex is determined by an interaction between mitochondrial male-sterility genes (CMS) that arise via recombination and nuclear restorer alleles that evolve to suppress them. In theory, gynodioecy occurs when multiple CMS types are maintained at equilibrium frequencies by balancing selection. However, some gynodioecious populations contain very high frequencies of females. High female frequencies are not expected under balancing selection, but could be explained by the repeated introduction of novel CMS types. (2) To test for balancing selection and/or the repeated introduction of novel CMS, we characterized cytoplasmic haplotypes from 61 populations of Lobelia siphilitica that vary widely in female frequency. (3) We confirmed that mitotype diversity and female frequency were positively correlated across populations, consistent with balancing selection. However, while low-female populations hosted mostly common mitotypes, high-female populations and female plants hosted mostly rare, recombinant mitotypes likely to carry novel CMS types. (4) Our results suggest that balancing selection maintains established CMS types across this species, but extreme female frequencies result from frequent invasion by novel CMS types. We conclude that balancing selection alone cannot account for extreme population sex-ratio variation within a gynodioecious species.
Data from: The continuum between semelparity and iteroparity: plastic expression of parity in response to season length manipulation in Lobelia inflata.
Background: Semelparity and iteroparity are considered to be distinct and alternative life-history strategies, where semelparity is characterized by a single, fatal reproductive episode, and iteroparity by repeated reproduction throughout life. However, semelparous organisms do not reproduce instantaneously; typically reproduction occurs over an extended time period. If variation in reproductive allocation exists within such a prolonged reproductive episode, semelparity may be considered iteroparity over a shorter time scale.This continuity hypothesis predicts that "semelparous" organisms with relatively low probability of survival after age at first reproduction will exhibit more extreme semelparity than those with high probability of adult survival. This contrasts with the conception of semelparity as a distinct reproductive strategy expressing a discrete, single, bout of reproduction, where reproductive phenotype is expected to be relatively invariant. Here, we manipulate expected season length—and thus expected adult survival—to ask whether Lobelia inflata, a classic "semelparous" plant, exhibits plasticity along a semelparous-iteroparous continuum. Results: Groups of replicated genotypes were manipulated to initiate reproduction at different points in the growing season in each of three years. In lab and field populations alike, the norm of reaction in parity across a season was as predicted by the continuity hypothesis: as individuals bolted later, they showed shorter time to, and smaller size at first reproduction, and multiplied their reproductive organs through branching, thus producing offspring more simultaneously. Conclusions: This work demonstrates that reproductive effort occurs along a semelparous-iteroparous continuum within a "semelparous" organism, and that variation in parity occurs within populations as a result of phenotypic plasticity.
Lobelia siphilitica (Campanulaceae) - leaf - on upper stem
Image of Lobelia siphilitica (Campanulaceae) - leaf - on upper stem
Lobelia siphilitica (Campanulaceae) - leaf - margin of upper + lower surface
Image of Lobelia siphilitica (Campanulaceae) - leaf - margin of upper + lower surface
Lobelia siphilitica (Campanulaceae) - inflorescence - whole - unspecified
Image of Lobelia siphilitica (Campanulaceae) - inflorescence - whole - unspecified
Lobelia siphilitica (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia siphilitica (Campanulaceae) - inflorescence - lateral view of flower
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