Puccinellia caespitosa (Poaceae) una nueva especie española

Martí, Gabriel Montserrat; Martı́, Josep

doi:10.3989/collectbot.1988.v17.157

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…from Italy, and it is not clear whether the mentioned chromosome counts come from Italian populations at all. There are only a few published records of diploid Puccinellia from the European inland: Avdulow (1931) – European part of Russia, Montserrat and Montserrat (1988) – Spain, and Amarell and Gregor (2021) – Germany. Therefore, the diploids from Italy, found so far only in two close localities of mud volcanos, probably represent the first verifiable report of diploids from this country.…”

Section: Discussionmentioning

confidence: 99%

Cryptic invasion suggested by a cytogeographic analysis of the halophytic Puccinellia distans complex (Poaceae) in Central Europe

Kúr,

Gregor,

Jandová

et al. 2023

Front. Plant Sci.

View full text Add to dashboard Cite

IntroductionDespite the wealth of studies dealing with the invasions of alien plants, invasions of alien genotypes of native species (cryptic invasions) have been vastly neglected. The impact of cryptic invasions on the biodiversity of plant communities can, however, be significant. Inland saline habitats and halophytes (i.e., salt-tolerant plant species) are especially threatened by this phenomenon as they inhabit fragmented remnants of largely destroyed habitats, but at the same time some of these halophytic species are rapidly spreading along salt-treated roads. To study potential cryptic invasion of halophytes, the patterns of genome size and ploidy variation in the Puccinellia distans complex (Poaceae), the most rapidly spreading roadside halophyte in Central Europe, were investigated.MethodsDNA flow cytometry with confirmatory chromosome counts were employed to assess ploidy levels of 1414 individuals from 133 populations of the P. distans complex. In addition, climatic niche modelling was used to predict the distributions of selected cytotypes.ResultsEight groups differing in ploidy level and/or genome size were discovered, one diploid (2x; 2n = 14), two tetraploid (4xA, 4xB; 2n = 28), one pentaploid (5x; 2n = 35), three hexaploid (6xA, 6xB, 6xC; 2n = 42), and one heptaploid (7x; 2n = 49). The hexaploids (mostly the 6xC cytotype) were widespread through the study area, spreading intensively in both anthropogenic and natural habitats and probably hybridizing with the natural habitat dwelling tetraploids. In contrast, the non-hexaploid cytotypes rarely spread and were predominantly confined to natural habitats.DiscussionThe extensive spread of the hexaploid cytotypes along roadsides has most likely facilitated their incursion into natural habitats. The colonization of new natural habitats by the hexaploids may pose a threat to the indigenous Puccinellia populations by compromising their genetic integrity and/or by outcompeting them.

show abstract

Section: Discussionmentioning

confidence: 99%

Cryptic invasion suggested by a cytogeographic analysis of the halophytic Puccinellia distans complex (Poaceae) in Central Europe

Kúr,

Gregor,

Jandová

et al. 2023

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…But in all the areas studied, a small proportion reflects regional variation; for example, a number of endemics inhabit calcicolous pastures (VILLAR & GARCÍA, 1989). So, the flora of these habitats would be only slightly richer if the areas considered were larger, but their proportion would decrease in front of that of plants of particular habitats (MONTSERRAT-MARTÍ & MONTSERRAT-MARTÍ, 1990).…”

Section: Biogeographic and Dynamic Aspectsmentioning

confidence: 99%

“…The occurrence of a number of very ancient paleoendemisms (e.g. Ramonda myconi) proves that these are very conservative habitats, even the dynamic scree and eroded slopes (MONTSERRAT-MARTÍ & MONTSERRAT-MARTÍ, 1990). This flora seems to thrive better than plants of more general habitats during climatic change and land use shifts (MA-JOR, 1988;GÓMEZ et al, 2003).…”

Section: Biogeographic and Dynamic Aspectsmentioning

confidence: 99%

Plant diversity across five vegetation belts in the Pyrenees (Catalonia, Spain)

Ninot¹,

Ferré²

2008

Collect. Bot

View full text Add to dashboard Cite

In this paper we analyze the size and habitat partitioning of the vascular floras of five areas of the NE Iberian Peninsula, representing five distinct vegetation belts and three floristic regions: Mediterranean (basal belt), medio-European (submontane and montane belts) and Boreo-Alpine (subalpine and alpine belts). Each area covered over 1000 ha, and was fairly uniform in terms of potential vegetation, bedrock and bioclimate. They excluded large villages and field areas, the landscape being mainly natural or moderately anthropized.The size of the local floras showed a unimodal function with respect to altitude, with the highest number of species (568) in the submontane belt. The decrease in species richness was moderate toward the neighbouring belts (basal and montane) but more marked from the montane to the subalpine belt and then to the alpine belt (the poorest area, with 217 species). However, considering the size of the areas studied, the montane belt showed higher species richness than the submontane belt. The species impoverishment toward higher altitudes followed general tendencies found in other altitude and latitude gradients, and reflects the increasing environmental constraints and the decreasing habitat diversity of colder landscapes. On the contrary, the richer floras of the submontane and montane areas reflect less stressful general conditions, but also the occurrence within them of a number of taxa from the neighbouring regions (Mediterranean and Boreo-Alpine).The forest flora in the basal to subalpine landscapes accounted for a small percentage of the local floras (6.5-13.2%). Among the other species, roughly one half (42-46%) made up diverse serial communities (forest clearings, scrubs, pastures) while the other half (44-51%) occurred in particular habitats (water sides, rocky areas) or in anthropogenic habitats. In the alpine area almost half of the taxa were found in the pasture mosaic, and a similar amount thrived in rocky and water-related habitats. Across the studied areas, the size of the flora particular to each main habitat showed no relationship with the surface area occupied by these habitats.Ongoing changes in land use -mainly rural abandonment-would have little effect on the ruderal floras, which can persist even in very small disturbed patches, and may have no effect on the plants of rocky and water-related habitats. But these changes clearly reduce the extent of secondary habitats (scrubs, pastures), and thus lead to population reduction and fragmentation, and eventually local extinction of the most rare species in these habitats.

show abstract