Demographic structure of three species of<i>Sarcocapnos</i>(Fumariaceae) as a basis for their conservation

Salinas, María; Suárez, Víctor; Blanca, Gabriel

doi:10.1139/b02-013

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…Habit: 0 = perennial, 1 = annual, 2 = biennial All members of Sarcocapnos are perennial except for S. enneaphylla which is described as both annual and perennial (Salinas et al 2002). 2.…”

Section: Resultsmentioning

confidence: 99%

Phylogeny and Character Evolution of Papaveraceae s. l. (Ranunculales)

Hoot¹,

Wefferling²,

Wulff³

2015

Systematic Botany

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To explore the taxonomic status, phylogenetic patterns, and character evolution of various groups within Papaveraceae s. l. (Pteridophylloideae, Papaveroideae, Hypecoideae, and Fumarioideae), two data sets were created and analyzed using Bayesian inference, maximum likelihood, and parsimony methods: 1) a Ranunculales data set for 82 genera representing all of the major families within the order using three chloroplast DNA regions (atpB, rbcL, and matK) and nuclear 26S ribosomal DNA, and 2) a Papaveraceae s. l. data set for an expanded sampling of the family (27 genera, 40 species) consisting of chloroplast sequences only. Branch support values on the resulting trees derived from the combined data for both the Ranunculales and Papaveraceae s. l. data sets were comparable among the various ranunculalean families and supported subfamilial recognition of Pteridophylloideae, Papaveroideae, Hypecoideae, and Fumarioideae. Within Papaveraceae s. l., most analyses of both data sets resolved the position of Pteridophyllum as sister to all remaining subfamilies and Hypecoum as sister to Fumarioideae; branch support for these relationships varied from excellent to weak. Within Papaveroideae and Fumarioideae, most taxonomic groups previously proposed were recovered, including a well-supported clade of South African species. Optimization of sixteen key morphological characters on the Bayesian inference tree indicated that some characters (e.g. presence of laticifers and nectaries, floral symmetry, spurred petals, and type of androecium) are highly congruent with the molecular phylogeny. Intrafamilial phylogenetic relationships and character evolution of the various taxa within Papaveraceae s. l. are further discussed.

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“…Habit: 0 = perennial, 1 = annual, 2 = biennial All members of Sarcocapnos are perennial except for S. enneaphylla which is described as both annual and perennial (Salinas et al 2002). 2.…”

Section: Resultsmentioning

confidence: 99%

Phylogeny and Character Evolution of Papaveraceae s. l. (Ranunculales)

Hoot¹,

Wefferling²,

Wulff³

2015

Systematic Botany

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“…A demographic comparison of three species of Pinguicula (Lentibulariaceae) revealed that the most geographically widespread species (P. villosa) had the shortest lifespan and greatest between-year variation in density (Svensson et al (Fumariaceae), the most widespread species (S. enneaphylla) had the shortest life span (Salinas et al 2002). More widely, Rabinowitz et al 1989) also found that rare prairie species were less variable in abundance from year to year than more common species.…”

Section: Comparisons Among the Myosotis Speciesmentioning

confidence: 99%

What limits a rare alpine plant species? Comparative demography of three endemic species of Myosotis (Boraginaceae)

et al. 2007

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Establishing what are the underlying causes of species range limits is of fundamental interest in ecology. We followed the fate of individually mapped plants of three endemic New Zealand high-alpine species of Myosotis, over a period of 9 years. The species provide contrasts in their geographical range and their demography. Myosotis oreophila Petrie is rare and extremely localized (c. 0.5 ha extent), Myosotis cheesemanii Petrie is regionally endemic, and Myosotis pulvinaris Hook. f. is more widespread. All three occur on the Dunstan Mountains, Central Otago, South Island, New Zealand within a 1-km radius, and individual plants were followed in four permanent plots. The three species differed in their longevity and in population variability, with the most widespread species (M. pulvinaris) having the lowest survival (61% per year), the fewest old plants (only 3% of plants present in 1993 surviving until 2001), no increase in survival rates with age, and the most variability in total numbers across years. Both of the rare species, M. oreophila and M. cheesemanii, had higher survival (75% and 88%, respectively, per year) especially for older plants, many older plants (20% and 59%, respectively, of 1993 plants surviving until 2001), and lower variability in total numbers across years. These results are consistent with other studies showing that rare plant species tend to have higher inertia than more common congeners. The range limits of M. oreophila showed a high level of spatial constancy on a scale of metres over the 9 years, despite 80% turnover in plants during that time. The M. oreophila population showed lower mean densities of plants near to the population boundaries, identical age-specific survival rates, but lower flowering probabilities, than the core of the population. We were unable to detect any abiotic differences between inside and outside the M. oreophila range in terms of topography, soil parent materials, microclimate or through manipulation of snow cover. Disturbance may be a factor affecting the distribution of M. cheesemanii but limiting factors for M. oreophila and M. pulvinaris are likely to be biotic (competition, seed limitation, dispersal capacity) and/or historic. Further experimentation is recommended.

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Concerted evolution of satellite DNA in Sarcocapnos: a matter of time

et al. 2011

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SarkOne is a genus-specific satellite-DNA family, isolated from the genomes of the species of the genus Sarcocapnos. This satellite DNA is composed of repeats with a consensus length of 855 bp and a mean G+C content of 52.5%. We have sequenced a total of 189 SarkOne monomeric repeats belonging to a total of seven species of the genus Sarcocapnos. The comparative analysis of these sequences both at the intraspecific and the interspecific levels have revealed divergence patterns between species are proportional to between-species divergence according to the phylogeny of the genus. Our study demonstrates that the molecular drive leading to the concerted-evolution pattern of this satellite DNA is a time-dependent process by which new mutations are spreading through genomes and populations at a gradual pace. However, time is a limiting factor in the observation of concerted evolution in some pairwise comparisons. Thus, pairwise comparisons of species sharing a recent common ancestor did not reveal nucleotide sites in transitional stages higher than stage III according to the Strachan's model. By contrast, there was a gradation in the percentage of upper transition stages (IV, V, VI) the more phylogenetically distant the species were. In addition, closely related species shared a high number of polymorphic sites, but these types of sites were not common when comparing more distant species. All these data are discussed in the light of current life-cycle models of satellite-DNA evolution.

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Demographic structure of three species ofSarcocapnos(Fumariaceae) as a basis for their conservation

Cited by 4 publications

References 30 publications

Phylogeny and Character Evolution of Papaveraceae s. l. (Ranunculales)

Phylogeny and Character Evolution of Papaveraceae s. l. (Ranunculales)

What limits a rare alpine plant species? Comparative demography of three endemic species of Myosotis (Boraginaceae)

Concerted evolution of satellite DNA in Sarcocapnos: a matter of time

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