scholarly journals Plant communities of cultivated fields of the Podlaski Przełom Bugu mesoregion part vi. communities of root crops on compact soils

2012 ◽  
Vol 63 (1) ◽  
pp. 235-257
Author(s):  
Zofia Rzymowska

Analysis of plant communities accompanying root crops on compact soils is presented in the paper. It is the next part of the review of plant communities of agrocenoses of the Podlaski Przełom Bugu (Podlasie Bug Gorge) mesoregion. The studied phytocoenoses were identified on the basis of 103 phytosociological relev&#233;s, made according to the Braun-Blanquet method. In the studied agrocenoses, plots of the associations <i>Lamio-Veronicetum politae</i>, <i>Galinsogo-Setarietum</i> and <i>Oxalido-Chenopodietum polyspermi</i> from the <i>Polygono-Chenopodion polyspermi</i> alliance were noted. Small patches of <i>Lamio-Veronicetum</i> and <i>Oxalido-Chenopodietum</i> were rarely noted in the studied area due to a small proportion of suitable habitats. In the area of Podlaski Przełom Bugu mesoregion, phytocoenoses of <i>Oxalido-Chenopodietum</i> developed in the river valleys on fertile muds and black soils. Typical plots of <i>Galinsogo-Setarietum</i> distinguishable by the mass occurrence of <i>Galinsoga parviflora</i> were only observed in the vicinity of farm buildings. Intermediate communities between <i>Panico-Setarion</i> and <i>Polygono-Chenopodion</i> polyspermi as well as phytocoenoces of <i>Echinochloo-Setarietum typicum</i> - subvariant with <i>Veronica persica</i> and <i>Echinochloo-Setarietum fumarietosum</i> - were also quite frequently noted in root crops on compact soils.

1995 ◽  
pp. 58-66
Author(s):  
N. M. Kalibernova

The fragment of the legend of the map concerning the vegetation of flood- plains and river-valleys in the subzones of northern and southern deserts is presented in the article. The map is compiled in Department of Vegetspon Geography and Cartography of Komarov Botanical Institute by a large team of botanists-geographers of the former USSR. The nature environments determining the development of vegetation of river-valleys in arid climate are conditioned by the intrazonal factors (alluvial and flood processes) at the background of natural zonal factors. Contrasts of environments and corresponding plant communities manifest themselves first of all. Mineralization of ground waters, salinity of soils, including the alluvial ones, are of essential importance. The practice of vegetation mapping of unstable habitats, to which floodplain landscapes belong, has shown that units of phytocoenological classification is of little use for this purpose. The heterogeneity of vegetation, consisting of short-term unstable serial communities generates a need for typification of space combinations of such phytocoenoses. For this purpose it is convenient to use generalized ecological-dinamic series, including plant communities of all levels within the limits of definite segment of valley. These series are the mapping units on the map. The vegetation of the first terrace is also nessecary to include in a single series with flood-plain vegetation because it has supplementary influence of ground waters. The higher divisions of the legend are based on zonal characters: vegetation of valleys in northern, middle and southern deserts. 13 numbers are used to show the vegetation cover of flood-plains and valleys. Additional 7 numbers are used for the out-of-valley meadow vegetation. The content is enriched by using of the letters by the numbers showing the geographic variants of series and ciphers for combination of series and out-of-series communities. The text legend is supplemented by the matrix (table), showing the subordination of subtitles, zonal position and geographic distribution of divisions. The types of series in the matrix are listed with indication of the main dominant species that gives the additional information on the legend divisions. The author's conclusion is that valley vegetation reveals clearly the zonal features, correlating with zonal (desert) vegetation.


1981 ◽  
Vol 4 ◽  
pp. 105-143
Author(s):  
I. R. Lane

At present, only a small proportion of livestock in developing countries are kept on cultivated pastures (Williamson and Payne, 1978).This paper is therefore more concerned with the intensification of the pasture production and the levels of animal production which may be achieved. In general, the pastures which may be cultivated in an area and the ways open for their utilization are related to the ecology of that area (Bogdan, 1977; Skerman, 1977). The factors which determine the natural vegetation to be found on a site, and the distribution of the major plant communities in developing countries, will therefore be reviewed first. Then, certain ecological zones which show promise for the intensification of pastures will be selected and, for each, some of the possible lines of development will be discussed.


2012 ◽  
Vol 58 (1) ◽  
pp. 243-253
Author(s):  
Janina Skrzyczyńska ◽  
Zofia Rzymowska ◽  
Piotr Stachowicz

The research on the localities of <i>Avena strigosa</i> and on its increased occurrence in agricultural crops of the Podlaski Przełom Bugu was carried out in 1994-1998. The documentation of this research consists of 600 phytosociological relevés and the floristic records. The paper presents the composition and structure of the field plant communities where <i>Avena strigosa</i> was found. It occurs frequently on various soil types of the Podlaski Przełom Bugu. However, on the area examined it was found just in small numbers, covering up to 5% of the area, while in the eastern part of the area an increase in its occurrence was observed. In the area of the Podlaski Przełom Bugu <i>Avena strigosa</i> occurred in spring cereals in the communities of <i>Arnoserido</i>-<i>Scleranthetum</i> and <i>Vicietum tetraspermae</i> as well as in the poor field communities, with the character species of <i>Aperion spicae</i>-<i>venti</i> and <i>Panico</i>-<i>Setarion</i>. Additionally, <i>Avena strigosa</i> was also found in the field communities of root crops belonging to <i>Panico</i>-<i>Setarion</i> alliance; however, it was present there just in small numbers.


2012 ◽  
Vol 62 (1) ◽  
pp. 127-136
Author(s):  
Marta Ziemińska-Smyk

Floristic research on segetal communities was carried out in 2000 on arable fields in the Skierbieszów Landscape Park and its protected zone. Three communities of segetal weeds in cereal crops, and two communities of segetal weeds in root crops were separated in the arable fields of the Skierbieszów Landscape Park. The community <i>Vicietum tetraspermae typicum</i> commonly occurred in cereal crops on brown soils developed from loess soils. The community <i>Echinochloo-Setarietum</i>, which belongs to root crops, was noted in the same habitat. The greatest richness of species was found in <i>Consolido-Brometum</i> and <i>Lamio Veronicetum politae</i>, with the average of 25 species in one record. Both communities were abundant in rare segetal species which are considered to be endangered in our country: <i>Adonis aestivalis</i>, <i>Euphorbia exigua</i>, <i>Lathyrus tuberosus</i>, <i>Muscari comosum</i>, <i>Thlaspi perfoliatum</i>, <i>Veronica polita</i>, <i>Agrostemma githago</i>.


Author(s):  
P. S. Maitland ◽  
A. V. Holden

SynopsisThe Inner Hebrides make up only a small proportion of the land area but a relatively higher percentage of the area of standing waters of Great Britain. Analyses of the 1:63,360 maps have provided the total numbers of standing and running waters on the islands (1,542 and 1,615 respectively) and are the basis for estimating the total resource there. The majority of lochs are small and relatively low lying. Most of the streams too are small and rarely larger than 4th order. Chemically, the waters are variable and range from some very acid nutrient-poor lochs on Islay to the unique marl lochs of Lismore. The algae of these islands have only occasionally been sampled and relatively little is known either about the higher aquatic plant communities—the ones studied are similar to those on the mainland. Few studies of the invertebrates of the inland waters have been carried out, and none of the surveys has been comprehensive. A review of the published and new data has enabled a broad account of the invertebrate communities to be presented. Only 15 species of fish occur here and most of the waters are dominated by the indigenous salmonids (salmon, trout and charr), sticklebacks or eels. Comparisons of the inland waters of the Inner Hebrides with those of other island groups (the Outer Hebrides and Shetlands) and the mainland of Scotland (especially Tayside) show that they have greater afiinities with the latter.


2012 ◽  
Vol 62 (2) ◽  
pp. 213-230 ◽  
Author(s):  
Czesława Trąba ◽  
Marta Ziemińska-Smyk

The paper tries to determine the environmental amplitude as well as the optimal conditions for the vegetation of <i>Papaver rhoeas</i> in the agrocoenoses of the Roztocze National Park's buffer zone, as compared to other Polish regions. The analysis is based on certain habitat and anthropogenic factors. Based on the author's own research and the data quoted in the literature, it has been found that <i>Papaver rhoeas</i> occurs in the associations and communities of the Caucalidion and Aperion alliances accompanying cereal and rape crops as well as in the <i>Polygono-Chenopodion</i> and <i>Panico-Setarion</i> alliances accompanying root crops. Papaver rhoeas demonstrates a large environmental scale, as its presence has been noted in low- and highlands, in foothills, in river valleys as well as on slopes. Moreover, it teams up with various types of soils (of a wide range of acidity, moisture as well as trophic and thermal conditions) and complexes. <i>Papaver rhoeas</i> occurs most often and in the largest numbers in winter crops in the <i>Lathyro-Melandrietum</i> and <i>Caucalidio-Scandicetum</i> association which belongs to the <i>Caucalidion</i> alliance and in the <i>Consolido-Brometum</i>, <i>Vicietum tetraspermae papaveretosum</i> and <i>V. t. consolidetosum</i> association from the <i>Aperion</i> alliance. As far as root crops are considered, <i>Papaver rhoeas</i> shows up in the <i>Lamio-Veronicetum politae</i> association from the <i>Polygono- Chenopodion</i> alliance. It prefers chalky and Jurassic rendzinas containing CaCO<sub>3</sub> and other fertile loam and loess soils which belong to wheat complexes, with their pH ranging from slightly acid to alkaline (Eutric Vertisols, chernozem, brown soil, alluvial soil) and which are moderately moist, warm, medium-rich in nitrogen and with good soil biological activity. In the foothill areas, it dominates on alluvial soils in the river valleys; rarely has it been spotted on the slopes. <i>Papaver rhoeas</i> rarely occurs on the lightest sandy soils of the weak and very weak rye complexes and weak cereal-fodder complexes. The distribution of <i>Papaver rhoeas</i> reflects the soil conditions in a given area.


2013 ◽  
Vol 54 (1) ◽  
pp. 153-161
Author(s):  
Konrad Błocki

This paper reports new stands of subatlantic <i>Spergulo-Chrysanthemetium segeti</i> associalion, found on the Olsztyn Lake District area. This association is very seldom described from Poland. It occurs in spring crops and root crops cultivations. The most important attributes of this association are: a mass occurrence of <i>Chrysanthemum segetum</i>, a numerous occurrence of <i>Spergula arvensis</i>, a big contribution of <i>Centauretalia cyani</i> species and habitat's humidity, indicated in the presence of numerous hygrophytes. Communities of this assciation found on Olsztyn Lake District are similaI to the other <i>Spergulo-Chrysanthemetum segeti</i> phytocoenoses, described from the other regions of Poland. However, they show a little differences too. The most important of them are: very small paIticipation of <i>Eu-Polygono- Chenopodion</i> species and the absence of <i>Panico-Semrion</i> species, general floristic scantiness and small participation of <i>Chrysanthemum segetum</i> and <i>Spergula arvensis</i> in the most of records. <i>Spergulo-Chrysanthemetum segeti</i> communities occur very seldom in the central part of the Olsztyn Lake District and they are probably the farthest advanced to the east, known stands of this association in Poland.


2020 ◽  
Author(s):  
Maria Ługowska

The paper deals with segetal flora in the Liwiec, Tyśmienica, and Wilga river valleys and with the impact of those locations on biodiversity and migra-tion of species from seminatural communities to arable fields. The studies were conducted between 2014 and 2018 on cereals, root crops, and stubble fields.To this end, the following research objectives were designated: 1. Inventory of flora in the agrocoenoses of the Liwiec, Tyśmienica, and Wilga river valleys. 2. Multidimensional comparative analysis of inventoried vascular plants, including: species occurrence, their geographical and historical origin, life-form, plant propagation, and type of ecological strategy. 3. Assessment of habitat conditions in designated permanent research plots in the transects located in the river valleys. 4. Statistical comparative analysis of habitat conditions in river valleys and permanent research plots. 5. Analysis of flora in permanent research plots in terms of plant sociolog-ical and ecological groups and their development strategies. 6. Statistical assessment of biodiversity in permanent research plots. 7. Analysis of the floristic richness of plant communities in terms of habitat conditions of the valleys of the Liwiec, Tyśmienica and Wilga rivers.


2018 ◽  
Vol 49 (1) ◽  
pp. 7-14
Author(s):  
Mirosława Pietryka ◽  
Dorota Richter ◽  
Magda Podlaska

Abstract The data presented in this paper concern the occurrence of Salvinia natans (L.) All. in Wrocław area. Field research was conducted in the vegetation season (June-September) between 2013 and 2017 in water bodies (natural and artificial), in the main river beds of the Oława and the Odra Rivers and in the Odra canals in Wrocław. The study provided 32 S. natans locations in the city area. The studied species occurred in various plant communities accompanied by numerous species which were also under protection, increasing the ecological value of the habitats. Additionally, a stable S. natans site was confirmed by the study in a location where aquatic fern had previously been recorded in Wrocław. The research indicates numerous populations of the species along the Odra and the Oława and in many old river beds and artificial water bodies in Wrocław and the results confirm the visible trend of a growing number of S. natans sites in all of Poland.


2012 ◽  
Vol 60 (1) ◽  
pp. 191-205
Author(s):  
Zofia Rzymowska ◽  
Janina Skrzyczyńska

This present paper, focused on root crop communities of light soils, is a part of the wide range characteristics of segetal communities of the Podlaski Przełom Bugu (Podlasie Bug River Gorge) mesoregion. On the basis of 160 phytosociological relevés made according to the Braun-Blanquet method, phytocenoses representing the <i>Panico-Setarion</i> alliance were distinguished. Most often, patches of the association <i>Echinochloo-Setarietum</i> were recorded in the study area. Heterogeneous habitat conditions affect its floristic diversity. Two subassociations of the phytocenosis, divided according to the species composition into 9 lower syntaxa, were identified on light soils. The following subassociations were distinguished: <i>Echinochloo-Setarietum setarietosum glaucae</i> in a typical variant and a variant with <i>Juncus bufonius</i>, both with subvariants with <i>Digitaria ischaemum</i>, as well as a typical variant of <i>Echinochloo-Setarietum typicum</i>, a variant with <i>Juncus bufonius</i> and a subvariant with <i>Oxalis stricta</i> in the typical and wet variant. Another association found in root crops on light soils of the Podlaski Przełom Bugu mesoregion is <i>Digitarietum ischaemi</i>. Its patches were observed in cultivations on light, acidic, poor soils. The characteristic feature of this community is the occurrence of numerous acidophilous species. In habitat conditions typical for the Podlaski Przełom Bugu mesoregion, <i>Digitarietum ischaemi</i> is differentiated into the typical and wet variant. Quite frequent patches of the <i>Setaria pumila-Setaria viridis</i> community were noted in intermediate habitat conditions, between those characteristic for <i>Digitarietum ischaemi</i> and <i>Echinochloo-Setarietum</i>.


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