Population and genetic structure of two dioecious timber species Virola surinamensis and Virola koschnyi (Myristicaceae) in southwestern Costa Rica

Riba‐Hernández, Pablo; Segura, Jorge Lobo; Fuchs, Eric J.; Moreira, Juan I.

doi:10.1016/j.foreco.2014.03.018

Cited by 16 publications

(12 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Genetic diversity estimates in this study were comparable to those found in other tropical trees [ 60 – 62 ] and species of the genus Spondias [ 63 – 65 ]. The comparison of genetic diversity parameters between S .…”

Section: Discussionsupporting

confidence: 86%

Genetic diversity, asexual reproduction and conservation of the edible fruit tree Spondias purpurea L. (Anacardiaceae) in the Costa Rican tropical dry forest

Cristóbal‐Pérez

Fuchs²,

Lobo³

et al. 2022

PLoS ONE

Self Cite

View full text Add to dashboard Cite

The term circa situm has been used to describe different conservation strategies within agricultural landscapes. Circa situm conserves planted or remnant species in farmlands, where natural vegetation has been modified through anthropogenic intervention. It has been proposed that trees planted or retained under circa situm conditions may contribute to maintaining genetic diversity, however information on the role of this strategy in preserving genetic diversity is scarce. The aim of this study was to determine the levels of genetic diversity and structure, and mating patterns in planted and unmanaged stands of the tropical fruit tree Spondias purpurea L. in north western Costa Rica. In three localities, we used seven polymorphic microsatellite loci and genotyped 201 adults and 648 seeds from planted and wild stands. We found no differences in genetic diversity among planted and wild stands. Genetic structure analysis revealed that gene flow occurs among planted and wild stands within localities. Clones were present and their diversity and evenness were both high and similar between planted and wild stands. The number of pollen donors per progeny array was low (Nep = 1.01) which resulted in high levels of correlated paternity (rp = 0.9). Asexual seeds were found in 4.6% of the progeny arrays, which had multilocus genotypes that were identical to the maternal trees. Our results show that although planted stands under circa situm conditions can maintain similar levels of genetic diversity than wild stands, the low number of sires and asexual seed formation could threaten the long term persistence of populations.

show abstract

Section: Discussionsupporting

confidence: 86%

Genetic diversity, asexual reproduction and conservation of the edible fruit tree Spondias purpurea L. (Anacardiaceae) in the Costa Rican tropical dry forest

Cristóbal‐Pérez

Fuchs²,

Lobo³

et al. 2022

PLoS ONE

Self Cite

View full text Add to dashboard Cite

show abstract

“…V. surinamensis is a relatively common canopy tree species on BCI and is native to tropical and subtropical wet lowland forests across Central America and Amazonia (38). V. surinamensis is dioecious (40), fly pollinated (41), and produces large seeds (∼2 cm) that are borne singly and surrounded by a nutritious aril that attracts several species of birds and monkeys as primary seed dispersers (42). On BCI, V. surinamensis flowering peaks in the dry season (∼January) and seed production peaks in the following wet season (∼July) (43).…”

Section: Fraction Of Pathogens That Are Genotype-specificmentioning

confidence: 99%

Evidence of within-species specialization by soil microbes and the implications for plant community diversity

Eck

Stump

Delavaux

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Microbes are thought to maintain diversity in plant communities by specializing on particular species, but it is not known whether microbes that specialize within species (i.e., on genotypes) affect diversity or dynamics in plant communities. Here we show that soil microbes can specialize at the within-population level in a wild plant species, and that such specialization could promote species diversity and seed dispersal in plant communities. In a shadehouse experiment in Panama, we found that seedlings of the native tree species, Virola surinamensis (Myristicaceae), had reduced performance in the soil microbial community of their maternal tree compared with in the soil microbial community of a nonmaternal tree from the same population. Performance differences were unrelated to soil nutrients or to colonization by mycorrhizal fungi, suggesting that highly specialized pathogens were the mechanism reducing seedling performance in maternal soils. We then constructed a simulation model to explore the ecological and evolutionary consequences of genotype-specific pathogens in multispecies plant communities. Model results indicated that genotype-specific pathogens promote plant species coexistence-albeit less strongly than species-specific pathogens-and are most effective at maintaining species richness when genetic diversity is relatively low. Simulations also revealed that genotype-specific pathogens select for increased seed dispersal relative to species-specific pathogens, potentially helping to create seed dispersal landscapes that allow pathogens to more effectively promote diversity. Combined, our results reveal that soil microbes can specialize within wild plant populations, affecting seedling performance near conspecific adults and influencing plant community dynamics on ecological and evolutionary time scales. plant-soil feedback | Janzen-Connell hypothesis | species coexistence | community simulation | seed dispersal

show abstract

“…The minimum reproductive size for V. surinamensis is ∼ 30 cm diameter at 1.3 m above ground (DBH) (Riba-Hernández et al . 2014).…”

Section: Methodsmentioning

confidence: 99%

Seedling performance in a dioecious tree species is similar near female and male conspecific adults despite differences in colonization by arbuscular mycorrhizal fungi

Eck

Delavaux

Wilson

et al. 2023

Preprint

View full text Add to dashboard Cite

Patterns of seedling growth and survival near conspecific plants have important consequences for species diversity in plant communities, but the factors causing intraspecific variation in seedling performance are unclear. Greater seed production or size of adult plants could both drive the local accumulation of specialized antagonist species in the environment and affect conspecific seedling performance. Experiments with dioecious species, in which only female individuals produce seeds, decouple these factors in areas of high conspecific density. To assess whether conspecific seedling performance is reduced in the environments associated with seed-producing female trees relative to male or heterospecific trees, we conducted shadehouse and field experiments with a dioecious tropical tree species,Virola surinamensis(Myristicaceae), on Barro Colorado Island, Panama. The shadehouse experiment isolated the effect of soil microbial communities on seedling performance and allowed us to quantify colonization by mutualistic arbuscular mycorrhizal (AM) fungi, while the field experiment allowed us to assess seedling performance in a context that included the effects of nearby conspecific trees. Seedling biomass at the end of the 8-mo shadehouse experiment was similar between experimental plants exposed to soil microbial communities from underneath female conspecific, male conspecific, and heterospecific adult trees. However, seedling colonization by AM fungi was higher in male soil microbial communities. Similarly, at the end of the 7-mo field experiment, survival and biomass did not differ among experimental seedlings grown in female, male, and heterospecific environments (but biomass was reduced near larger conspecific adults). Together, our experiments did not support the hypothesis that conspecific seedling performance is reduced in female environments relative to male environments, despite reductions in colonization by mutualistic AM fungi in female soil microbial communities. Thus, intraspecific variation in the biotic interactions between conspecific seedlings, established adults, and mutualist species may not translate directly to patterns of tropical tree seedling survival.

show abstract

Population and genetic structure of two dioecious timber species Virola surinamensis and Virola koschnyi (Myristicaceae) in southwestern Costa Rica

Cited by 16 publications

References 71 publications

Genetic diversity, asexual reproduction and conservation of the edible fruit tree Spondias purpurea L. (Anacardiaceae) in the Costa Rican tropical dry forest

Genetic diversity, asexual reproduction and conservation of the edible fruit tree Spondias purpurea L. (Anacardiaceae) in the Costa Rican tropical dry forest

Evidence of within-species specialization by soil microbes and the implications for plant community diversity

Seedling performance in a dioecious tree species is similar near female and male conspecific adults despite differences in colonization by arbuscular mycorrhizal fungi

Contact Info

Product

Resources

About