How important is clonal recruitment for population maintenance in rare plant species?: the case of the narrow endemic cactus, Stenocereus eruca, in Baja California, México

Clark‐Tapia, Ricardo; Mandujano, María C.; Valverde, Teresa; Mendoza, Ana; Molina‐Freaner, Francisco

doi:10.1016/j.biocon.2005.01.019

Cited by 35 publications

(35 citation statements)

References 25 publications

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“…The positive autocorrelation found for O. microdasys for both genets and ramets at relatively short distances (less than 20 m) and the levels of relatedness between pairs of genets within habitats suggests that in addition to a short dispersal distance of clonal propagules shown by distribution of ramets within genets, seeds produced by biparental inbreeding has been frequent, also being dispersed short distances with seedling establishment occurs principally nearby of mother plants. In general, studies that have analyzed spatial autocorrelation in other species report the same pattern found for O. microdasys (Table 3), where positive autocorrelation generally occurs at distances less than 20 m when there is a deficient movement of seeds or pollen or high clonality (Garnier et al 2002;Hämmerli and Reusch 2003;Clark-Tapia et al 2005;Wilson et al 2005). However, positive autocorrelation occurs at larger distances because plantlets and agamospermic seeds are more mobile and can disperse further away or to frequent pollen flow between the same distant patches (Torres et al 2003).…”

Section: Discussionmentioning

confidence: 60%

“…A similar arrangement also found in the agamospermous species Hyparrhenia diplandra at a scale of meters, although at the population level ramets of the same genet tend to be clumped due to poor dispersion of seeds (Garnier et al 2002; Table 3). Other species with non-linked offspring, by detachment of branches as Lophocereus schottii (Parker and Hamrick 1992), Stenocereus eruca (Clark-Tapia et al 2005) and Ferocactus robustus (Carrillo-Angeles et al 2005), mainly generate spatial distributions of genets with aggregated ramets, but some are intermingled ramets of different genets on the periphery of the area occupied by each focal genet.…”

Section: Discussionmentioning

confidence: 98%

“…As a consequence, the mode of clonality influences the ability of descendants to disperse and therefore is a major determinant of the spatial distribution pattern. We would expect that clonal plants that propagate through non-linked vegetative diaspores, such as bulbils, and/or reproduced asexually by agamospermy, have spatially intermingled genets, random spatial distribution patterns and non autocorrelation at short distances because their propagules are able to disperse further away from the parent plant, while linked species that propagate by runners or rhizomes have spatially clumped genets and show positive autocorrelation at short distance (e.g., Gabrielsen and Brochmann 1998;Garnier et al 2002;Hämmerli and Reusch 2003;Clark-Tapia et al 2005), and the same can be expected in species where a large number of seeds are dispersed in a single fruit as has been observed in plants where birds move seeds of the same individual plant in groups (Godoy and Jordano 2001;Torimaru et al 2007). Nevertheless, is important to consider that many seeds can be deposited in compact groups by primary dispersion, but secondary dispersal can change this initial pattern (Kalisz et al 1999;Wang and Smith 2002).…”

Section: Introductionmentioning

confidence: 99%

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Spatial distribution pattern of a clonal species: effects of differential production of clonal and sexual offspring

et al. 2011

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The spatial distribution patterns of genets and ramets within populations are expected to change as a function of the frequency with which clonal species recruit different types of offspring (sexual and clonal). We used an integrated approach to study the spatial arrangement of clonal plants by combining molecular and ecological data using Opuntia microdasys as a study system. The species is able to produce two types of clonal (plantlets and cladodes) and one type of sexual (seeds) offspring. Additionally it is found in three habitats that cause differences in the ability of each type of offspring to establish. In 2007, all individuals in the three habitats (162 in BH = bajada, 264 in IDH = hill-piedmont, and 136 at HPH = interdunes) were tagged and mapped. Amplified inter-simple sequence repeats (ISSR's) were used to determine the multilocus genotype and relatedness of each individual ramet using 120 polymorphic bands (104 in BH, 128 in HPH and 180 in IDH). The spatial distribution pattern of genets and ramets was analyzed with the Hopkins test and spatial autocorrelation analysis. For all habitats we found that O. microdasys displayed a spatial distribution characterized by clumps of aggregated ramets, but habitats differed in the number of genets present. As for other clonal species a strong positive spatial autocorrelation exists within 20 m, although all analyses suggest that adjacent ramets are genetically less related to each other or belong to different genets, that is, ramets of different genets are intermingled. The spatial arrangement of genets and ramets in O. microdasys between habitats closely matches the frequency of establishment of each type of offspring (e.g. the more clonal areas are clumped groups of related individuals).These results confirm that in two habitats (BH and IDH) clonal recruitment had been more common than in the other habitat (HPH).

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Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Spatial distribution pattern of a clonal species: effects of differential production of clonal and sexual offspring

et al. 2011

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“…Flexible investment into seedling production according to environmental conditions may have important effects on population dynamics and growth (Mandujano et al 2001;Clark-Tapia et al 2005;Marcante et al 2009). For example, this study demonstrated that C. americana populations experienced a decrease in sexual reproduction that corresponds to low-rainfall and nutrient-poor soil conditions.…”

Section: Discussionmentioning

confidence: 98%

The effects of resource availability on sprouting: a key trait influencing the population dynamics of a tree species

Lucena

Amorim

Lobo

et al. 2015

Trees

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Key message Sprouting is a key component of the population dynamics of woody species. Regeneration via sprouting contributes substantially to population growth when resource availability varies. Abstract Basal sprouting is an important trait that facilitates the persistence of woody species under different environmental conditions. Environmental heterogeneity can have variable effects on allocation to sexual reproduction and vegetative growth over an individual's ontogeny; consequently, environmental heterogeneity can influence the dynamics of woody plant populations. However, the effects of environmental factors on the ramet and genet dynamics of woody species have yet to be fully explored. This study investigated the population dynamics of Curatella americana L. (Dilleniaceae), an abundant tree species with a wide geographic distribution. The following hypotheses were tested: (1) density, vital rates and population growth rate are constrained by low rainfall and low soil fertility and (2) ramet production contributes more than seedling production to population growth at low rainfall levels and low soil fertility. Population dynamics were evaluated at two soil types (low and high fertility) over 3 years (2010, 2011 and 2012) with varying rainfall levels (average, average and low rainfall levels, respectively). Both hypotheses were supported. Vegetative growth and the population growth rate were limited by low rainfall and low soil fertility. The survival rates of adults and immature ramets had the largest effect on population growth. Although sprouting was limited by resource availability, this regeneration mode contributed more than seedlings to population growth. Basal sprouting not only ensures species persistence but also, as indicated by these results, permits a species to tolerate a lack of seedling recruitment. Basal sprouting was, therefore, determined to play an important role in the population growth of woody species in heterogeneous environments.

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“…Plant spatial distribution can also change the patterns of pollen distribution, and closer conspecific plants have been found to have higher pollen load and higher seed set (Brys & Jacquemyn 2010). On the other hand, for clonal plants, intensive clonal growth should increase self-pollen deposition and consequently should reduce the chance of cross-fecundation, decreasing female fecundity (Clark-Tapia et al 2005;Dorken & Drunen 2010). Both situations would result in similar fruit/ seed production in plants growing closer to each other.…”

Section: Discussionmentioning

confidence: 99%

Effect of rosette size, clonality and spatial distribution on the reproduction of Vriesea carinata (Bromeliaceae) in the Atlantic Forest of Paraná, southern Brazil

Silva

Varassin

2016

Acta Bot. Bras.

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Plant size and clonality are important traits for explaining the reproductive eff ort of clonal plants. Larger plants can invest more resources into reproduction, and clonality is known to increase reproductive eff ort. Moreover, reproductive eff ort is infl uenced by environmental variation, and so the spatial distribution of plants may aff ect plant reproductive eff ort. We investigated the eff ect of plant size, clonality and spatial distribution on the reproductive eff ort of Vriesea carinata in the Atlantic Forest in the state of Paraná, Brazil. We marked twenty individual plants and measured their rosette size, biomass and number, as well as rosette reproductive eff ort (number of fl owers, fruits and seeds). We also evaluated the relationship between reproductive eff ort and spatial distribution of plants. Reproductive eff ort did not correlate with size, whereas greater clonal growth contributed to a lower reproductive eff ort because rosettes within clones that had more rosettes set fewer fl owers. We found that plants growing closer to each other exhibited similar reproductive eff orts independently of vegetative traits, because reproductive traits were spatially autocorrelated. In Vriesea carinata, the main drivers of reproductive eff ort are clonality, which decreases fl ower production, and spatial factors, which result in greater similarity in reproductive eff orts among more proximate plants.

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How important is clonal recruitment for population maintenance in rare plant species?: the case of the narrow endemic cactus, Stenocereus eruca, in Baja California, México

Cited by 35 publications

References 25 publications

Spatial distribution pattern of a clonal species: effects of differential production of clonal and sexual offspring

Spatial distribution pattern of a clonal species: effects of differential production of clonal and sexual offspring

The effects of resource availability on sprouting: a key trait influencing the population dynamics of a tree species

Effect of rosette size, clonality and spatial distribution on the reproduction of Vriesea carinata (Bromeliaceae) in the Atlantic Forest of Paraná, southern Brazil

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