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1

Effects of mowing regime on diversity of Mediterranian roadside vegetation: implications for management

100%
Simoes M. P., Belo A. F., Souza C.
Polish Journal of Ecology
|
2013
|
tom 61
|
nr 2
Shrub development on road outside verges can provide alternative wildlife habitat. However, management of inside verges should keep vegetation at a height consistent with proper road visibility and safety. The influence of management on vegetation was analyzed on the inside verge of two Portuguese roads, one mown once and another twice a year. Specifically, the effect of mowing frequency on shrub abundance and the combined effect of management and shrubs on floristic diversity were addressed. One stretch of each road was surveyed for shrub abundance and for herbaceous species diversity and cover. The effect of mowing frequency on shrub growing and biomass production and allocation was also evaluated along two years. Results indicate that vegetation mowing yearly in spring is enough to keep the inside verge free from most shrubs. However, summer growing shrubs like Dittrichia viscosa can persist, decreasing both floristic diversity and cover, particularly of meadow species. Moreover, in response to spring mowing, shrubs grew fast and were able to disperse efficiently. An additional autumn mowing significantly decreased not only shrub height and canopy area, but specially seed production and dispersal. Thus, the inside verge management should be based on two mowing periods. The first in spring to control winter and spring growing species, and an additional autumn mowing to control growth and dispersal of summer growing shrubs and trees, or even tall grasses. This management regime will combine safety with improvement of the amenity and habitat value of the road verges.
2

Origin and spatial distribution of roadside vegetation within the forest and agricultural areas in Szczecin Lowland [West Poland]

100%
Wrobel M.
Polish Journal of Ecology
|
2006
|
tom 54
|
nr 1
The paper presents research results of roadside vegetation which were carried out along public roads with hardened surface within the forest and agricultural areas in Szczecin Lowland (West Poland). Mosaic of habitat conditions observed along roadsides was suitable for development over 39 syntaxa from 10 classes of vegetation. The significant diversity of roadside vegetation of anthropogenic origin was found in agricultural regions, whereas within the forest areas mostly autogenic roadside vegetation were observed. Spatial distribution of roadside plant associations was related to the zonal structure of roadside profile. Anthropogenic associations were connected with narrow stripes adjoining to the roads but autogenic ones prefered roadside ditches and slopes. Majority of plant associations, regardless of the way of land use, found suitable habitat conditions in the roadside ditches.
3

Floristic composition and environmental determinants of roadside vegetation in North England

80%
Akbar K. F., Hale W. H. G., Headley A. D. D.
Polish Journal of Ecology
|
2009
|
tom 57
|
nr 1
73-88
The roadside vegetation in some counties of north England (north and west Yorkshire) was studied to determine the community structure according to the British National Vegetation Classification (NVC) and main environmental factors influencing its composition. The data from Phytosociological survey (699 quadrats) and from the physico-chemical analyses of 233 soil samples from 35 sites were obtained. Both the classification (TWINSPAN & MATCH) and ordination programs (Canonical Correspondence Analysis) were used. The roadside vegetation is mainly dominated by few grasses (Arrhenatherum elatius, Festuca rubra, Dactylis glomerata, Lolium perenne, Poa trivialis, Elymus repens, Holcus lanatus) and their associated herbs (Cirsium arvense, Heracleum sphondylium, Urtica dioica). Five NVC Mesotrophic grassland communities (Arrhenatheretum elatioris community MG1, Lolium perenne-Cynosurus cristatus grassland MG6, Lolium perenne leys MG7, Holcus lanatus-Deschampsia cespitosa grassland MG9, Festuca rubra-Agrostis stolonifera-Potentilla anserina grassland MG11) and one Upland Festuca ovinaAgrostis capillaris-Galium saxatile grassland, U4 were identified which in general, exhibited good fit with the typical NVC units. Altitude, pH, potassium, sodium and road age were found to be the main variables affecting the roadside vegetation. By relating the floristic composition with ecological characteristics of the roadside verges, three kinds of pattern of variation are observed. The first pattern is related to regional or geographical characteristics and the second pattern of variation exists across the width of the road verges showing a zonal pattern of plant distribution. The third scale of pattern is active at the local level including micro-environmental conditions, e.g., local edaphic variables.
4

Evaluation of conservation status of roadside verges and their vegetation in North England

80%
Akbar K. F., Hale W. H. G., Headley A. D., Ashraf I.
Polish Journal of Ecology
|
2010
|
tom 58
|
nr 3
The roadside verges and their vegetation in selected counties of north England were evaluated for their conservation status. Thirty five different road sections each 50 m long along different A and B class roads were surveyed and the criteria selected for conservation evaluation included verge area, plant diversity, species richness, disturbance, presence of rare species and structure of hedges. A field assessment sheet was prepared in which, for each factor, a numerical rating system was used. For each factor, information was recorded to help the surveyor in choosing the appropriate score for that site. The rarity of recorded species was determined from the published sources. Most of the surveyed verges (54%) are of low conservation value, 40% are of medium conservation value and only 6% have high conservation status. Despite the unsatisfactory situation, there is considerable potential for using roadside verges for nature conservation because medium class verges could be improved by adopting sound management techniques.
5

Road-side herbaceous vegetation: life history groups and habitat preferences

70%
Sera B.
Polish Journal of Ecology
|
2010
|
tom 58
|
nr 1
The study examine s the vegetation diversity (235 herbaceous species) in variable road-site types in terms of life history components (life traits) like life form, type of pollination, seed dispersal, spreading ability, life strategy according to Grime’s classification, and in terms of habitat preferences using Ellenberg’s indicator value (in relation to light, temperature, moisture, nitrogen, soil pH and soil salinity). Plants registered as alien species were evaluated also according to invasive status, level of abundance, introduction mode and land use habitat. Study localities (9 sites) were situated in the Českomoravská highlands and the South Bohemian regions (Czech Republic). The plant species were recorded in the bands (width in range of 1.5–3.0 m) along the verge of two types of roads (motorways with median stripes) and secondary roads (II and III classes). In total – road length of about 15 km and the total area of roadside vegetation of about 8 ha were surveyed. The annual/therophyte species with a tendency to seed dispersed by wind, preferring a light and dry habitat, and having the RC (competitive-ruderal) life strategy were mainly found along the motorways. It means that road verges along motorways are quite insolated and constitute the dry habitats, probably suitable for ruderal, weedy, non-native, and invasive species. On the contrary, species with a tendency to vegetative reproduction and the C (competitive) strategy occur mainly along the secondary roads. It seems that the secondary roads are alternative habitats for grassland flora. Species occurred on the verges of the secondary roads do not belong to the particular group of the life traits. The salt tolerant species Puccinellia distans (Jacq.) Parl. was found along all types of roads. Almost 24% of all recorded herbaceous species growing in road-sites were alien species.
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