Biotic Interactions (GloBI) · NCBI – National Center for Biotechnology Information. Alsophila firma. Open Interactive Map. Alsophila firma image. Click to Display. Brief summary. No one has contributed a brief summary to this page yet. Explore what EOL knows about Alsophila firma. Add a brief summary to this page. Alsophila firma (Baker) D.S. Conant is an accepted name. This name is the accepted name of a species in the genus Alsophila (family Cyatheaceae). The record.
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In each population, all identifiable individual stems AH: Tree ferns in the interior and the edge of a Mexican cloud forest remnant: Images above are simplified interpretations of petiole scales for Cyatheaceae, Fig. Furthermore, study of the spatial genetics and demography of the two life stages of ferns would be highly valuable in increasing our understanding of the causes of SGS in these plants.
Species of the genus Hymenophyllopsis are small plants with pinnate fronds, mostly cm long. The increase in SGS observed by analysing all sampled individual stems of A. The arborescent rhizome of Cyathea medullaris.
Furthermore, the results of two of these studies are not conclusive as to SGS in fern populations. This is a rare species that occurs mainly as a riparian species in montane cloud forests from Mexico to Panama and western Ecuador, with stems that can reach 15 m in height Gastony, Retrieved from ” https: We assume that SGS would arise by limited spore dispersal and frequent clonal growth occurring within short distances, which would also translate firmw a significant spatial clustering of stems.
About Chris Reilly I am a botanist who is particularly interested in the vascular and lower plants of the British Isles.
Tree ferns exhibit a range of morphological variations and sizes: Furthermore, the arborescent growth form seen in tree ferns is not unique — it aksophila also be seen in Blechnaceae Korall et al. Population structure and gene flow of the Brazilian shrub Helicteres brevispira. SphareopterisCyatheaAlsophila sensu stricto and Gymnosphaera. Local genetic differentiation among populations of the mass-flowering tropical shrub Erythroxylum havanense Erythroxylaceae.
Leaf phenology and trunk growth of the deciduous tree fern Alsophila firma Baker D. There are two morphological synapomorphies which can assist in identifying a tree fern. Worldwide distribution of Cyatheaceae based on data from Encyclopedia of Life www. Cyatheaceae has a pan-tropical southern temperate distribution. The arborescent tree-like Alsophila firma. Correlograms of estimated inter-individual kinship R L fitma distance for plastid haplotypes A, B and nuclear alleles C, D in two studied populations of the tree fern Alsophila firma AH: The extant scaly tree ferns are commonly found in the tropics, from alsophils wet lowlands to mid elevations.
Nevertheless, gametophytic selfing would produce completely homozygous individuals, which would have a great impact on population fitness Klekowski, Some populations of A. Phylogeny and evolution of ferns Monilophytes with a focus on the early leptosporangiate divergences. More recently, Hymenophyllopsis has been described as a subgenus within Cyathea Christenhusz, Cyatheaceae are placed within the class of ferns known as Polypodiopsida or the Leptosporangiate Cirma which contains the vast majority of fern diversity.
The location of individual stems was carefully mapped using the distance m and compass bearings between individuals, thus obtaining the relative spatial coordinates of each individual. Species of Cyathea in America related to the western Pacific species C. From Wikimedia Commons, the free media repository.
SEINet Portal Network – Alsophila firma
New combinations and an overview of Cyathea subg. Sorry, your blog cannot share posts by email. In this context, clonal growth might be related to the breeding system of tree ferns in other ways. Spatial genetic structure SGS in plant species can be a,sophila as the non-random spatial distribution of genotypes within populations.
Ferns, together with lycopods, are unique among land plants in having a complex life cycle with two free-living life stages i.
Changes in the distribution of cloud forests during the last glacial predict the patterns of genetic diversity and demographic history of the tree fern Alsophila firma Cyatheaceae.
For example, an increasing density of ramets would tend to expand the spore shadow of an individual genet, thus augmenting the probabilities of outcrossing and reducing the adverse effects of inbreeding. Using the allele data for each individual i. The analyses of SGS in the two populations of A. Oxford University Press is a department of the University of Oxford.
Citing articles via Google Scholar. Spatial population genetic structure in Trillium grandiflorum: Nuclear and plastid haplotype frequencies per population in two populations of the tree fern Alsophila firma AH: Conservation priorities for tree ferns Cyatheaceae in Sri Lanka. These proposed alskphila are separated by differences in scale morphology. Madagascar is an example of this pronounced local endemism, the island has 49 endemic species of scaly tree ferns Janssen et al.