Influence of community structure on the spatial distribution of critically endangered Dicerandra immaculata var. immaculata (Lamiaceae) at wild, introduced, and extirpated locations in Florida scrub

Richardson, Matthew L.; Watson, Montserrat L. J.; Peterson, Cheryl L.

doi:10.1007/s11258-013-0181-2

Cited by 20 publications

(6 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further controlled experiments need to be done to verify our results, but Savannas Mint apparently is adapted to open sunny habitats, warm weather, and well-drained soil, like other Dicerandra spp. [24], [28]. Evidence supporting this statement is our data suggesting that Quench™ had a negative influence on reproduction of Savannas Mint and plants had the highest survival when planted during hot summer months.…”

Section: Discussionmentioning

confidence: 61%

“…Therefore, to guide the establishment of this new population at SPSP, we relied on what little information was available about the ecological niches of related Dicerandra spp. [24], lessons learned from our restoration of Lakelas Mint [28], and observations of habitat that has become unsuitable at EC. Environmental and genetic factors individually and interactively influence survival and reproduction of plants (e.g., [29]–[31]), so we tested the influence of shade, leaf litter, propagation method, parent genotype, parent collection site, planting date, and absorbent granules on survival, reproduction, and recruitment of Savannas Mint in the introduced population, and we present those findings here.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Parent Genotype and Environmental Factors Influence Introduction Success of the Critically Endangered Savannas Mint (Dicerandra immaculata var. savannarum)

et al. 2013

Self Cite

View full text Add to dashboard Cite

Species previously unknown to science are continually discovered and some of these species already face extinction at the time of their discovery. Conserving new and rare species in these cases becomes a trial-and-error process and conservationists will attempt to manage them by using knowledge of closely related species, or those that fill the same ecological niche, and then adapting the management program as needed. Savannas Mint (Dicerandra immaculata Lakela var. savannarum Huck) is a perennial plant that was discovered in Florida scrub habitat at two locations in 1995, but is nearly extinct at these locations. We tested whether shade, leaf litter, propagation method, parent genotype, parent collection site, planting date, and absorbent granules influenced survival, reproduction, and recruitment of Savannas Mint in a population of 1,614 plants that we introduced between June 2006 and July 2009 into a state protected site. Survival and reproduction of introduced plants, and recruitment of new plants, was higher in microhabitats in full sun and no leaf litter and lower in partially shaded habitats. The two sites from which parent plants were collected differentially influenced survival and reproduction of introduced plants. These differences in survival and reproduction are likely due to underlying genetic differences. Differential survival of progeny from different parent genotypes further supports the idea that underlying genetics is an important consideration when restoring plant populations. The most successful progeny of parent genotypes had survival rates nearly 12 times higher than the least successful progeny. We speculate that many of these environmental and genetic factors are likely to influence allopatric congeners and other critically endangered gap specialists that grow in Florida scrub and our results can be used to guide their conservation.

show abstract

Section: Discussionmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Parent Genotype and Environmental Factors Influence Introduction Success of the Critically Endangered Savannas Mint (Dicerandra immaculata var. savannarum)

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Many species within the Brassicaceae and Fabaceae, including three additional species of Warea and eight additional Lupinus species, are endemic to Florida and our propagation techniques could likely be used to guide their conservation. Our results also are likely applicable to other short-lived herbaceous species in Florida scrub and sandhill because they are narrowly adapted only to the disturbance regime and microhabitat specific to this imperiled habitat (Hartnett and Richardson 1989;Menges et al 1999;Richardson et al 2013).…”

Section: Discussionmentioning

confidence: 84%

Variables influencing germination and initial survival of two critically endangered plants: Warea amplexifolia and Lupinus aridorum

RynearJuliet

PetersonCheryl

RichardsonMatthew³

2013

Botany

Self Cite

View full text Add to dashboard Cite

One challenge of ex situ conservation is developing propagation methods that promote a high rate of survival and genetic diversity. Developing successful propagation methods is especially important for rare species to prevent their extinction. Clasping warea, Warea amplexifolia (Nutt.) Nutt. (Brassicaceae), and scrub lupine, Lupinus aridorum McFarlin ex Beckner (Fabaceae), are two rare species endemic to imperiled Florida sandhill and scrub habitats, respectively. We tested whether the collection site of seeds, seed stratification temperature, and several propagation methods influenced germination and initial survival of W. amplexifolia and L. aridorum. The collection site of seeds and type of pot influenced percent germination of W. amplexifolia, whereas soaking seeds in water and stratification temperature did not. The site where seeds were collected did not influence germination of L. aridorum and treating seedlings with salicylic acid, nitrogen, or salicylic acid and nitrogen sometimes reduced, but did not increase, initial survival of seedlings. Overall, our results will inform additional experiments on ex situ conservation and may be applicable to other herbs endemic to Florida. Résumé: Un des défis de la conservation ex situ consiste à développer des méthodes de propagation favorisant un taux de survie élevé et une diversité génétique. La mise au point de méthodes de propagation efficaces revêt une importance particulière pour les espèces rares, afin de prévenir leur extinction. Le Warea amplexifolia (Nutt.) Nutt. (Brassicaceae) et le Lupinus aridorum McFarlin ex Beckner (Fabaceae), représentent deux espèces rares endémiques des habitats menacés de dunes et de broussailles en Floride, respectivement. Les auteurs ont examiné si le site de collection des semences, la température de stratification des graines et plusieurs méthodes de propagation influencent la germination et la survie initiale du W. amplexifolia et du L. aridorum. Le site de récolte des graines et le type de pot influencent le pourcentage de germination du W. amplexifolia, alors que le trempage des graines dans l'eau et la stratification restent sans effet. Le site de récolte des graines n'influence pas la germination du L. aridorum et le traitement des graines à l'acide salicylique, à l'azote, ou à l'acide salicylique et azote diminuent quelques fois, mais n'augmentent pas la survie initiale des plantules. Dans l'ensemble, les résultats obtenus pourront servir à d'autres expériences sur la conservation ex situ et pourraient être applicables à d'autres herbacées endémique de la Floride. [Traduit par la Rédaction]

show abstract

“…Dense patches of plants offer clumped resources for pollinators and reduce their energy expenditure (Kacelnik et al 1986). Lakela's Mint plants are often clustered together in sunny areas (Richardson et al 2013), so perhaps flowering plant density, or other environmental characteristics, are more important to pollinators in this system than plant height. Taller Lakela's Mints had more total flowers, which were more likely to experience a pollination event, than shorter plants.…”

Section: Discussionmentioning

confidence: 99%

“…This is especially true for short-lived species that regenerate only through seed (Bond 1994;Schemske et al 1994) because population dynamics are closely linked to seed dynamics (Pavlik et al 1993). For such species, reproduction may be asexual when no donation of pollen occurs or through a breeding system that involves self-pollination (geitonogamy), which may occur within the same flower (autogamy) or between different flowers within the same plant (allogamy), or through cross-pollination between genetically distinct plants (xenogamy) (Richards 1986;Barrett 1998;Neal and Anderson 2005;Eckert et al 2009). Plants may use a mixture of geitonogamy and xenogamy (Cruden 2000;Eckert 2000).…”

Section: Introductionmentioning

confidence: 99%

Breeding system of the critically endangered Lakela's Mint and influence of plant height on pollinators and seed output

Richardson

Keathley

Peterson³

2015

Population Ecology

Self Cite

View full text Add to dashboard Cite

Understanding reproductive systems of rare plants is critical for conservation efforts. Lakela's Mint, Dicerandra immaculata Lakela var. immaculata, is an endangered plant endemic to an approximately 4.8-km long area in Florida, USA. We used an experimental garden and three populations of Lakela's Mint to determine: (1) what is the breeding system (autonomous, asexual, self-fertile, cross-fertile) and are insects necessary for reproduction; (2) which native and nonnative insect species visit flowers and is the frequency of visits to a plant influenced by its height;(3) does the number of flowers visited within a plant by individual insects differ among native and nonnative insect species and due to plant height; and (4) is seed output influenced by plant height? Our results indicate that the breeding system of Lakela's Mint was facultative outcrossing. Insect-pollinated flowers produced more seeds than flowers that reproduced autonomously or asexually. The honey bee Apis mellifera L., a nonnative species, was the most frequent visitor to plants and visited more flowers within plants than native pollinators, but its behavior was not influenced by plant height. Native pollinators such as Bombus impatiens Cresson were attracted more frequently to shorter plants, but visited fewer flowers than on taller plants. Despite having fewer total and pollinated flowers, shorter plants had a higher output of intact seeds than taller plants, which could be due to differences in efficiency between native and nonnative pollinators or other factors. Our results add insight into factors influencing seed output and interactions between pollinators and rare plants.

show abstract

Influence of community structure on the spatial distribution of critically endangered Dicerandra immaculata var. immaculata (Lamiaceae) at wild, introduced, and extirpated locations in Florida scrub

Cited by 20 publications

References 35 publications

Parent Genotype and Environmental Factors Influence Introduction Success of the Critically Endangered Savannas Mint (Dicerandra immaculata var. savannarum)

Parent Genotype and Environmental Factors Influence Introduction Success of the Critically Endangered Savannas Mint (Dicerandra immaculata var. savannarum)

Variables influencing germination and initial survival of two critically endangered plants: Warea amplexifolia and Lupinus aridorum

Breeding system of the critically endangered Lakela's Mint and influence of plant height on pollinators and seed output

Contact Info

Product

Resources

About