Wyniki wyszukiwania - AGRO

1

Species diversity in grassland communities under different habitat conditions

100%

Jastrzebska M., Szarejko T., Holdynski C., Jastrzebski W. P.

Polish Journal of Natural Sciences

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2009

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tom 24

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nr 1

43-59

Two hundred species of vascular plants were identified in grasslands on the Popielno Peninsula, in the part used for agricultural purposes. Species diversity in plant communities, measured by the Shannon-Wiener index, was found to depend on soil type, land use type and phytosociological affiliation. Greater species diversity was observed in communities that developed on mineral soils, are used as pastures, and belong to the class Molinio-Arrhenetheretea. The biodiversity of grassland communities on the Popielno Peninsula is affected by habitat conditions. The relationship between vegetation biodiversity and habitat quality is difficult to grasp due to its multidimensional character. The methods of multivariate statistics may prove useful in this respect.

2

Effects of salinity on species diversity of rotifers in anthropogenic water bodies

100%

Bielanska-Grajner I., Cudak A.

Polish Journal of Environmental Studies

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2014

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tom 23

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nr 1

This study investigated the influence of anthropogenic salinization on planktonic rotifer communities and traced changes in their diversity along a salinity gradient. The experiment was conducted in 14 ponds of varied anthropogenic origin located in Poland’s Silesian Upland. On the basis of the mean concentration of total dissolved solids (TDS) and principal component analysis (PCA), the water bodies were divided into 4 groups in respect to salinity: freshwater ponds, TDS < 500 mg·dm⁻³; subsaline ponds, TDS = 500-3,000 mg·dm⁻³; hyposaline ponds, TDS = 3,000-20,000 mg·dm⁻³; and mesosaline ponds, TDS = 20,000-50,000 mg·dm⁻³. An increase in salinity resulted in a decrease of rotifer species richness and diversity. Salinity also had a negative effect on mean rotifer density. The highest densities were recorded in freshwater and hyposaline ponds, whereas the lowest were in subsaline and mesosaline waters. Rotifer species richness differed significantly at 2 salinity thresholds: TDS = 500 mg·dm⁻³ and 20,000 mg·dm⁻³.

3

Distribution patterns in Iberian Peninsula rodents

100%

Palomo L. J., Vargas J. M., Jimenez-Gomez M. P.

Polish Ecological Studies

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1994

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tom 20

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nr 3-4

4

Estimating species numbers by extrapolation I: comparing the performance of various estimators using large model communities

100%

Ulrich W.

Polish Journal of Ecology

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1999

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tom 47

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nr 3

5

Evidence supporting the concept of a regionalized distribution of testate amoebae in the Arctic

86%

Beyens L., Bobrov A.

Acta Protozoologica

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2016

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tom 55

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nr 4

6

Diversity of macrophytes in Lake Rotcze in the Leczna-Wlodawa Lakeland

86%

Sender J.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

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tom 01

7

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Effect of repeated fire on understory plant species diversity in Saravan forests, northern Iran

86%

Daryayi M. G., Adel M. N., Pashaki M. S., Kuhestani J. S.

Folia Forestalia Polonica. Series A . Forestry

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2013

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tom 55

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nr 3

Fire usually causes changes in the composition and diversity of herbaceous species. The present paper aimed to study the effect of repeated fire incidents on understory species diversity in the Saravan forests of Guilan Province located in the north of Iran. To do so, three 50-hectare areas with identical physiographical conditions and overstory (hand-planted softwood Pinus taeda) were selected. Seven fire incidences occurred for the 10-year period in one of the areas and the other area experienced three fire incidents within the same period. The area with no fire incidents was considered as the control area. All the fire incidents were surface ones. The systematic random method with a sample size 100 × 200 m was used for collecting data. Based on the above, 25 samples were determined in each area. The whole coverage of the understory was taken into consideration using Whittaker’s method and the Domain criterion so as to calculate species diversity indices. The results showed that Shannon-Wiener diversity and Menhinick’s richness in the regions which experienced 3 and 7 fire incidents were maximum and minimum, respectively, whereas no significant difference was seen between the regions with regard to Smith and Wilson’s evenness index.

8

The preservation status of the lichen biota in the designed Special Area of Conservation NATURA 2000 "Middle Lyna River Valley - Smolajny"

86%

Kubiak D., Czarnota P., Zdunczyk A., Dynowska M., Lesnianski G., Cyganska A., Olszewska S., Sadowska-Des A., Wojdal P.

Acta Mycologica

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2014

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tom 49

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nr 1

The paper presents the list of 159 taxa, including 151 lichens and 8 saprotrophic or parasitic (lichenicolous) fungi, recorded in the designed Special Area of Conservation NATURA 2000 „Middle Łyna River Valley – Smolajny” (the Forest Division of Wichrowo). The analysed area (2953 ha) covers mostly forest communities, with natural character, associated with the valley of the Łyna river (hillside lime-oak-hornbeam forests, streamside alder-ash forest, riparian black alder forest).

9

Tree diversity and management of Village Common Forests in Bandarban

86%

Kamrul K. I., Jashimuddin J., Hossain N.

Environment, Earth and Ecology

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2017

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tom 1

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nr 2

Village Common Forests (VCF) are used sustainably for water source conservation, livelihoods and other biomass needs ofethnic communities in the hilly areas of Bangladesh. The current forest degradation rate warrants the importance and potentiality of VCF for sustainable natural resources management. This study was conducted in two VCF of Lama and RumaUpazila at Chimbuk hill range in Bandarban district to explore the indigenous management techniques and tree species diversity. To identify tree species diversity, eighteen plots (9 plots from each VCF) were selected at different hill position (top, middle and bottom) by stratified random sampling method with the dimension of 20m×20m per plot. Shiner-winner and Simpson index were used to calculate the tree species diversity. According to the analyses, it was found that diversity was higher in top of the hill, but species density (stem/ha) was higher in the valley. It was also found that 23000 seedlings/ha regenerated naturally and among the 31 identified families, Moraceae was dominant where the density was 354 stems/ha with basal area 52.63 m2/ha. The dominant species were Schleicher oleosaand Anisopterascaphula and important non-timber species were Melocannabaccifera and Calamusgurubagrowing abundantly in the study areas. It was observed that the VCF were managed by ethnic Mro community with two different committees (customary and executive) who made some rules for natural forest conservation. This management practice is not only conserving hill forests, but also helping to improve degraded forest and create new habitats for biodiversity in the study area.

10

Avifauna of chosen fish pond complexes in Lublin province

86%

Cios S., Dziedzic R., Beeger S., Zwolski W.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

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tom 01

11

Vascular flora of drainage ditches in forest areas of the Polesie National Park

86%

Banach B.

Acta Agrobotanica

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2009

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tom 62

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nr 1

This paper presents the results of floristic studies conducted in the years 2003 – 2005 within the area of the Polesie National Park. The aim of the research was to compare the flora of initial succession stages in drainage ditches with the flora of neighbouring forest areas undergoing transformation as a result of drainage. Floristic lists were made in four designated study areas as well as in forest phytocoenoses. The results of field investigations were subjected to analysis with regard to the systematic affinity of the flora and proportions of plant life-forms as well as of historical-geographical groups and range groups. In the species composition of the studied drainage ditches hemicryptophytes were the dominant group of plant higher life-forms, whereas in the neighbouring communities the flora was represented by both hemicryptophytes and megaphanerophytes. In historical and geographical terms, the flora of drainage ditches and neighbouring communities represents definitely the group of spontaneophytes. Anthropogenic habitats, which developed within the drainage ditches, were colonised by native flora species characteristic for the Polesie National Park area.

12

Macrofungi of wooded patches in the agricultural landscape. I. Species diversity

86%

Kujawa A.

Acta Mycologica

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2009

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tom 44

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nr 1

49-75

This article begins a four-part series, which presents the results of mycological research carried out in 2000-2007 in the agricultural landscape of the General Dezydery Chłapowski Landscape Park. This part includes description of the study area and field research methods, as well as a list and localities of 617 macrofungal taxa recorded in the Park. The next parts of this series will deal with: species that are rare, protected by law or recorded for the first time in Poland; the role of wooded patches for preservation of fungal diversity in the agricultural landscape; and changes in species diversity and structure of fungal communities in forest communities under strong human pressure.

13

An effect of strip-management on carabid beetles [Col., Carabidae] in sugar beet crop

86%

Twardowski J. P., Hurej M., Jaworska T.

Journal of Plant Protection Research

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2006

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tom 46

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nr 1

61-71

The attractiveness of uncultivated (weedy) and cultivated strips (planted with a mixture of flowering plants) and the adjacent sugar beet crop to Carabidae was studied in 1999–2000 at the Experimental Research Station near Wrocław, Poland. Obtained results showed that greater plant abundance and their diversity on weedy strips had a positive effect on the number of carabid beetles. Also more carabid species were identified in uncultivated strips than in strips of mixture of Phacelia tanacetifolia, Coriandrum sativum and Sinapis alba. The lowest number of species was trapped in sugarbeet crop and bare soil. The most numerous species in all treatments were Pseudoophonus rufipes, Anchomenus dorsalis (Pont.), Poecilus cupres and the species of the Bembidion genera.

14

Planktonic rotifers diversity in selected rivers of the Vistula, Wieprz and San drainage-basins

86%

Demetraki-Paleolog A.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

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tom 01

15

Species composition and diversity of morphotypes in epilithic biotopes of Zhytomyr region, Ukraine

86%

Patsyuk M.

Acta Biologica

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2020

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tom 27

16

Effects of forest fragmentation on forest plant species diversity in agricultural landscapes

86%

Orczewska A., Sikorski P.

Annals of Warsaw Agricultural University. Horticulture and Landscape Architecture

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2006

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tom 27

17

Military training areas and vegetation – the effect of explosion craters on species diversity along a moisture gradient

86%

Krawczyk R., Zubel R., Komsta L.

Polish Journal of Ecology

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2019

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tom 67

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nr 3

18

The effect of fallow period length on the abundance and diversity of usable plant assemblages in shifting cultivation system (swidden agriculture) in Northern Laos

86%

Delang C. O., Weiyi X., Brooke B., Chun K. P.

Polish Journal of Ecology

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2016

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tom 64

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nr 3

Shifting cultivation, or swiddening, involves alternating cycles of cropping and fallow periods. Rather than being abandoned, the fallow swidden fields provide a source of important plant products for remote, forest-dwelling human communities. In northern Laos, the traditional length of fallow periods used to range between five and 11 years, depending on the availability of land and quality of the soil. Fallow periods are currently being shortened because of population pressures and government policies. To determine the potential impacts of shorter fallow periods, 128 swidden fallows of various ages (up to 20 years), located at altitudes between 400 and 800 m a.s.l. in northern Laos were sampled for usable plants. The impact of fallow length on plant abundance and species diversity was analysed. The number of usable plant species was found to increase with the fallow age until it was 11–12 years old, and then decline, while the abundance of usable plants increased beyond that period. We conclude that shorter fallows will result in a significantly smaller usable plant abundance and species diversity for the villagers. We propose that 11–12-year-long fallows should be considered in order to fully exploit the greater plant volume of older fallows as well as the compositional shift of species in fallows over time.

19

Effect of burrowing activity of root vole [Microtus oeconomus Pallas] on plant diversity in alpine meadow

86%

Sun P., Zhao X., Zhu W., Xu S.

Polish Journal of Ecology

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2005

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tom 53

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nr 4

Herbivory and burrowing activity of mammals may influence the species composition and diversity of plant communities. The effect of corridors and holes systems constructed by root vole (Microtus oeconomus Pallas) on the plant species diversity was studied in the habitat of high - mountain meadow (3250 m a.s.l in Qinghai-Tibet Plateau, China). By using grid method, these disturbances were studied on 16 plots (100 cm × 100 cm) distributed in 4 transects in studied area, in August 2000 and 2001. The disturbance intensity index, D, was calculated as the percent of the ground surface disturbed by voles in the study area. Plant species were identified and counted on the same plots. In total 46 plant species were identified – 39% of this number was considered as sensitive to the vole disturbances as their occurrence and/or abundance decreased along the disturbance intensity. Generally, a significantly negative correlation (r = – 0.911, P < 0.01) between vole aboveground disturbances and plant species diversity (H’) was found. The results suggest that root vole ground disturbances, especially in the form of actively utilized holes and corridors have significantly negative influence on plant species diversity in high-mountain grassland habitat.

20

Altitudinal distribution of harvestmen [Euchelicerata: Opiliones] in Slovakia

86%

Stasiov S.

Polish Journal of Ecology

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2008

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tom 56

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nr 1

The influence of altitude on the distribution of harvestmen (Opiliones) and on their species diversity in Slovakia was studied. The data were obtained from the numerous published sources and from the unpublished results of the author’s own research activity. These basic results include the findings of 32 species from 680 localities, located unevenly in all the altitudinal vegetation zones of Slovakia at elevations from 107 to 2100 m a.s.l. The sampling area represents almost all the territory of Slovakia. The harvestmen were collected in a wide scale of various types of indigenous terrestrial biotopes including open land, forest ecosystems, agricultural country and urban habitats. The most of the studied species of harvestmen are distributed in a wide elevation range. The model of the altitudinal trend in the harvestmen species diversity has a shape of the single-peaked curve with the peak between 500 and 600 m a.s.l. The reduced richness of species at lower altitudescould be caused by the intensive agricultural activity in these regions. The range of area altitudinal zones 500–12 000 km2 does not show a significant influence on the species diversity of harvestmen.

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