Wyniki wyszukiwania

1

Grazing exclusion effects on the relationship between species richness and vegetation cover in Mongolian grasslands

100%

Guo T.

Polish Journal of Ecology

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2020

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tom 68

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nr 3

2

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Wieloletnie zmiany fitoplanktonu letniego jako wskaznik trofii wybranych jezior

100%

Wojciechowska W., Poniewozik M., Pasztaleniec A.

Acta Agrophysica

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2002

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tom 68

255-265

3

Adaptative strategy of leaf traits to drought conditions: Quercus aliena var. acuteserrata forest (The Qinling Mts. China)

100%

Wang M., Wan P., Chai Y., Guo Y., Zhang X., Yue M.

Polish Journal of Ecology

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2015

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tom 63

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nr 1

In a climax community where all species are sharing relatively similar and stable habitat, there are differences in leaf traits between deciduous trees and shrubs and dominant species and companion species, especially in leaf lifespan (LLs). What are the differences of relationships among leaf traits between deciduous trees and shrubs? What are the mechanisms of this phenomenon? Here, we presented a one-year observation and recorded the LLs followed a modified method in a Quercus aliena var. acuteserrata forest in the north slope of the Qinling Mountains, China. We found that (i) Different species in the same stand performed quite differently in their LLs (P <0.005). Average LLs of shrubs was slightly longer (P = 0.05) than that of deciduous trees. (ii) LLs showed a significant negative correlation with specific leaf area (SLA) and leaf nitrogen content (LNC) (P <0.05) in deciduous trees, however, a significant positive correlation with LNC and leaf carbon content (LCC) (P <0.05) was detected in shrubs. (iii) The comparison of the traits between dominant and companion species in arbor layer and shrub layer showed that there was no significant difference in LLs, LCC and LNC, except SLA in arbor layer. Our study indicated that the amount of light, at the community scale, might be a main factor determining the LLs of wood plants in deciduous forest. The difference between trees and shrubs in relationships among leaf traits suggests that deciduous trees and shrubs may take different strategies to adapt to the environment. SLA is likely to be a marker trait to distinguish dominant and companion species in arbor layer of deciduous broad leaved forest.

4

Population structure of three dominant Calanus species in North Water Polynya, Baffin Bay

100%

Prokopowicz A., Fortier L.

Polish Polar Research

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2002

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tom 23

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nr 3-4

241-252

5

Spatial and seasonal variations of large tintinnid ciliates in Shenhu Bay of China

100%

Wang Y., Zhang W., Lin Y., Zheng L., Yang J.

Oceanological and Hydrobiological Studies

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2014

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tom 43

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nr 3

6

Leaf morphology shift of three dominant species along altitudinal gradient in an Alpine meadow of the Quinghai - Tibetan Plateau

100%

Zhong M., Wang J., Liu K., Wu R., Liu Y., Wei X., Pan D., Shao X.

Polish Journal of Ecology

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2014

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tom 62

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nr 4

It has been observed that leaf morphology shift within species is linked to climate change, but there are few studies on the effects of altitude change on leaf morphology of species. We hypothesized that similar to climate change, a morphological shift within species would occur over time under different growing altitudes. In this study, we evaluated three dominant grass species: Elymus nutans Griseb., Kobresia capillifolia Clarke., Carex moorcroftii Boott., taking advantage of the altitudinal variations (3000-4000 a.s.l.) on the Qinghai-Tibetan Plateau. Our study showed that almost all leaf traits of these three species had significant differences (P <0.05) across an altitudinal gradient. Different species responded differently to altitude change. Leaf thickness (LT) of the three species increased with increase in altitude. Leaf area (LA) of E. nutans and C. moorcroftii decreased with increasing altitude, but that of K. capillifolia increased. There was no obvious linear effect on leaf dry matter content (LDMC) and specific leaf area (SLA) of these three species. LDMC of E. nutans and C. moorcroftii showed a trend of increase, while that of K. capillifolia decreased. SLA of E. nutans and K. capillifolia showed a trend of increase, but that of C. moorcroftii decreased with increase in altitude. In addition, soil pH (pH) and air temperature (AT) decreased with increase in altitude. However, other soil and climate factors increased as altitude increased. The finding of this work is that leaf morphology shift within species happens under altitude change to adapt to specific environment.

7

Aerobic methane emission from plant: comparative study of different communities and plant species of Alpine meadow

100%

Guo X., Du Y., Li J., Liu S., Han D., Li Y., Lin L., Zhang F., Oyang J., Cao G.

Polish Journal of Ecology

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2015

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tom 63

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nr 2

This study was aimed at qualifying the methane emission ability of different communities in alpine meadow, and monitoring if the dominant species from these communities could emit methane in a sand culture experiment. Using the static chamber technique and gas chromatography method, two experiments were conducted in the field and in laboratory. First, the methane flux rate was measured in plant communities: natural alpine meadows (NM), Elymus nutans pasture (EP), herbaceous community in shrub (HS), and a Poa fruticosa meadow (PS). A 3-month sand culture experiment was conducted to show the non-microbial methane emission from living plants. Average methane emission rates were estimated to be 16.83 µg m⁻² h⁻¹(range -49.3–107.8), 28.49 µg m⁻² h⁻¹ (range -55.0–96.2) and 20.91 µg m⁻² h⁻¹ (range -31.9– 145.8) for NM, EP, and PS, respectively. Methane emission rate from EP was significantly higher than from NM during the growing season. The reclaim of grassland would enhance the methane emission in this aera through this one year's measurement, but whether this conclusion suit to the whole Tibet Plateau, it remains further longer time and larger spatial scale experiments to verify it. The result of the sand culture experiment showed that some plant species emitted methane in an aerobic, nonmicrobial environment, most of herbaceous species showed a methane emission characteristic, the methane emission from plant may have a species dependent characteristic.

8

Seed predation patterns favor the regeneration of dominant species in forest gaps compared with the understory in an oak-pine mixed forest

100%

Yu F., Shi X., Wang D., Wang T., Yi X., Lou Y.

Acta Theriologica

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2014

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tom 59

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nr 4

Recent studies have demonstrated the higher likelihood of regeneration in forest gaps compared with the understory for the dominant species in pine-oak mixed forest. Here, we tested whether rodent seed predation or dispersal was beneficial for gap regeneration. We tracked the seed predation and dispersal of Quercus aliena var. acuteserrata and Pinus armandii using coded plastic tags in the forest understory close to gaps. Our results demonstrated that the proportions of initial buried seeds of both species were significantly more abundant in the forest understory compared with gaps. After seed caching, however, significantly lower proportions of the seeds of both species survived in the forest understory compared with gaps during the 30-day observation period. The final survival proportions of the seeds cached in the forest understory were lower than those cached in the gaps the next spring, which indicated that small rodents rarely retrieved scatter-hoarded seeds from forest gaps. Our findings suggest that rodent seed predation patterns contribute to the regeneration of the dominant species in gaps compared with the understory in a pine-oak mixed forest. In the study area, reforestation usually involves planting seedlings but direct sowing in forest gaps may be an alternative means of accelerating forest recovery and successional processes.

9

Vertical distribution of dominant cyanobacteria species in three lakes - evidence of tolerance to different turbulence and oxygen conditions

100%

Wojciechowska W., Poniewozik M., Pasztaleniec A.

Polish Journal of Ecology

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2004

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tom 52

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nr 3

The composition and abundance of cyanobacteria in three lakes of the Polesie Lubelskie (East Poland) were studied in summer periods. Vertical distribution of these algae was analysed in two depths – in epilimnion and deoxygenated metalimnion. Species composition and domination was similar for these two sites. It means that the species like: Limnothrix planctonica (Wołosz.) Meffert, Limnothrix redekei (Van Goor) Meffert, Planktothrix agardhii (Gom.) Anagn. et Kom., Woronichinia naegeliana (Unger) Elenk. and Microcystis viridis (A. Braun in Rabenhorst) Lemm. are not affected by turbulence of water as well as by oxygen conditions.

10

Trophic state assessment based on late summer phytoplankton community structure: a case study for epilimnetic lake water

100%

Szelag-Wasielewska E.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr 3

11

Leaf stoichiometric trait and specific leaf area of dominant species in the secondary succession of the Loess Plateau

80%

An H., Shangguan Z.

Polish Journal of Ecology

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2010

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tom 58

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nr 1

Ecological stoichiometry is the study of the balance of multiple chemical elements in ecological interactions. Terrestrial plants exhibit inter- and intra-specific differences in leaf C:N:P stoichiometry that has been used to study plant competition and succession, nutrient use efficiency, N and P nutrient limitation. However, little is known about leaf C:N ratio, N:P ratio in the Loess Plateau, particularly the pattern of leaf C:N:P stoichiometry during the secondary succession. Thus, leaf stoichiometric traits and specific leaf area (SLA) of dominant species at different secondary successional stages in the Loess Plateau were measured. The study was conducted at the Lianjiabian forest region of the Loess Plateau (35.03°–36.37°N and 108.10°–109.08°E), Gansu, China. Leaf C:N:P stoichiometry and specific leaf area of 18 dominant species (herb) community stage (Stipa bungeana Trin, Bothriochloa ischaemun (Linn.) Keng, Carex lanceolata Boott, Artemisia sacrorum Ledeb, Pulsatilla chinensis (Bunge) Regel, Potentilla chinensis Ser), shrub community stage (Sophora viciifolia Hance, Hippophae rhamnoides (Linn.), Ostryopsis davidiana Decne, Rubus palmatus Thunb, Rosa xanthina Lindl, Acer ginnala Maxim, Spiraea pubescens Turcz, Ziziphus jujuba var. spinosa), early forest community stage (Populus davidiana Dode, Betula platyphylla Suk, Platycladus orientalis (Linn.) Franco), climax forest community stage (Quercus liaotungensis Koidz)) at four secondary successional stages were determined in the Loess Plateau in early June of 2006. The herb and shrub community stage had higher SLA than that in the early forest community stage and climax forest community stage. The Leaf C, N, C:N ratio and N:P ratio at different secondary successional stages were significantly different (P <0.05), but the leaf P didn’t differ. The N:P ratio of herb community stage were significant difference from those of the others stages (shrub community stage, early forest community stage and climax forest community stage), but there were not significant difference among the shrub community stage, early forest community stage and climax forest community stage. N:P ratio shifts of the species were consistent along the successional sere, although the N:P ratio of the different species at a successional stage varied considerably. On community level, the lowest N:P ratio (9.8) was found in herb community stage in the secondary succession, the N:P ratio increased to 12.9 in shrub community stage, declined to 12.4 in early forest community stage, and increased in climax forest community stage (e.g. 12.6 in the Quercus liaotungensis Koidz community). The results suggest that the vegetation productivity of the Loess Plateau was N-limited at each secondary successional stage.

12

Zmiany składu gatunkowego runi w warunkach użytkowania pastwiskowego i symulowanego

80%

Kulik M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2009

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tom 542

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nr 1

Celem pracy było określenie wpływu sposobu użytkowania na zmiany składu gatunkowego runi. Badania przeprowadzono w latach 2002-2007 w Sosnowicy na glebie mineralnej. W badaniach uwzględniono dwa sposoby użytkowania runi: pastwiskowy (wypas bydła rasy mięsnej Limousine) oraz symulowany (częste koszenie, proporcjonalne do ilości wypasów). Drugim czynnikiem badawczym było 6 mieszanek trawiasto-motylkowatych z gatunkami testowanymi (Poa pratensis, Festulolium braunii, Festulolium loliaceum - 2 rody, Lolium perenne i Festuca pratensis). Natomiast stałymi komponentami mieszanek były: Phleum pratense, Dactylis glomerata i Trifolium repens. Główną uwagę skupiono na udziale mieszańców Festulolium loliaceum w runi w porównaniu do pozostałych gatunków uwzględnionych w badaniach. Skład gatunkowy ulegał znacznym zmianom w latach badań i był uzależniony od sposobu użytkowania runi oraz wysianej mieszanki nasion. Mieszańce Festulolium loliaceum charakteryzowały się w latach badań średnio udziałem zbliżonym do ilości uwzględnionej w mieszance nasion (30%), natomiast w roku 2007 ich udział wynosił 44,1-59,7% (I ród) oraz 43,9-47,6% (II ród). Wśród gatunków testowanych dużym udziałem odznaczały się również Lolium perenne, Poa pratensis i Festulolium braunii, natomiast znacznie mniejszym Festuca pratensis. W runi pastwiskowej zanotowano większy udział Trifolium repens i L. perenne oraz mniejszy udział gatunków z grupy ziół i chwastów.

13

Bud banks of two dominant grass species and their roles in restoration succession series of a flooded meadow

80%

Li H., Yang Y., Zhao Y.

Polish Journal of Ecology

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2012

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tom 60

|

nr 3

The primary goals of this study were to quantify the composition and size of bud banks and to evaluate the roles of bud banks of main dominant species Leymus chinensis (Trin.) Tzvel. and Carex duriuscula C.A. Mey. in population maintenance over a 2-year period. The four experimental plots were in early, early-mid, middle and late seral stages of a flooded restoration succession after they had approximately 12, 10, 8, and 6 months’ flood durations in the Songnen meadow, China. Five quadrats (each 0.25 ´ 0.25 m in area and 30 cm deep) were each sampled in four seral spots. The differences of L. chinensis and similarity of C. duriuscula in bud bank characteristics persisted in the studied seral stages from year to year. In each seral stage, rhizome buds comprised most of the L. chinensis bud banks in 2003; in 2004, juvenile tillers predominated. Rhizome buds consisted of the majority of C. duriuscula bud banks throughout the study period. The bud densities of L. chinensis and C. duriuscula experienced a significant linear increase with the increase of tiller density at different seral stages each year, but the slopes of these relationships in L. chinensis were higher than those in C. duriuscula. The total bud densities of C. duriuscula showed a significant linear decrease corresponding to the increase of those of L. chinensis from the early to the late seral stage in 2003 and 2004. Bud banks are vital for population maintenance and the number of bud banks is a good predictor of population dynamics.

14

Najwazniejsze szkodniki wierzby wiciowej [Salix viminalis]

80%

Ropek D., Barabasz W., Szmigiel A., Kolodziejczyk M., Oleksy A.

Progress in Plant Protection

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2005

|

tom 45

|

nr 2

1032-1034

15

Zmiana zachwaszczenia pszenicy ozimej w zaleznosci od przedplonu w latach 1984-2001

80%

Pudelko J., Skrzypczak G., Maciejewski T.

Progress in Plant Protection

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2005

|

tom 45

|

nr 2

1015-1018

16

The role of the shoreline ecotonal zone in spawning success and early life history of dominant fish species in the lowland Sulejow Reservoir

80%

Frankiewicz P., Dabrowski K., Rucinski W., Zalewski M.

International Journal of Ecohydrology and Hydrobiology

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2001

|

tom 01

|

nr 1-2

The roach preferred branches of spruce and juniper as artificial spawning substratum rather than pine and birch. Perch preferred birch over conifers. Thus altering the availability of spawning substrata in the littoral zone should be effective in controlling the density and structure of juvenile roach and perch communities in reservoirs. Density dependent processes affects the early life history of fishes. Surveys in the Sulejow Reservoir in 1994 and 1997 provide an example of how increased availability of prey fish in the littoral zone may influence a predator population. During early summer age-0 pikeperch formed two discrete groups, one in the littoral and the other in the pelagic zone. In the littoral pikeperch became piscivorous at c. 3 cm on the numerous juvenile cyprinids, and grew relatively fast (5.2->9 cm by mid-July 1994). Those in the pelagic where prey fish were scarcer fed chiefly on zooplankton and grew relatively slowly (4.2-6.6 cm by mid-July 1994). From the resulting bimodal length distribution the upper modal group (littoral) had a higher probability of surviving their first winter. These data suggest a critical role for the ecotonal habitats in the dynamics of the trophic cascade, and show possibilities for controlling symptoms of eutrophication.

17

The effect of dominant species on numbers and age structure of Iris sibirica L. population on blue moor-grass meadow in Southern Poland

80%

Kostrakiewicz K.

Acta Societatis Botanicorum Poloniae

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2007

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tom 76

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nr 2

Two populations of Iris sibirica, a clonal species protected by law in Poland, occurring in patches of Molinietum caeruleae, of similar floristic composition although with different dominant species, were studied. In the Stanisławice locality, species with a high competitive potential prevailed, contrary to the Opatkowice locality, where the species of low competitive potential dominated. It was established that vegetative propagation ensures the continued presence of populations in both localities, although the proximity of plants with high competitive potential limits the vegetative propagation of ramet clusters of Iris sibirica. Despite the high level of seed production, the recruitment of seedlings in both patches is possible only in artificially created gaps. The field observations support the conclusion that creating gaps allowing for germination of seeds and development of seedlings, as well as eliminating expansive neighbours allowing proliferation of ramet clusters of Iris sibirica, is an affective way of protecting populations of this species.

18

Skład gatunkowy i dynamika występowania zmieników w uprawie majeranku i bazylii.

71%

Dankowska E.

Progress in Plant Protection

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2010

|

tom 50

|

nr 2

The results of performed studies revealed that in marjoram and basil growing, the species Lygus rugulipennis predominated, and represented 65% of all caught Lygus. Two generations of the pest were observed during the year. Most numerous catches of Lygus were recorded in July and August.

19

Sposób wykonania uprawy przedsiewnej a zachwaszczenie łanu pszenicy ozimej

71%

Wesolowski M., Bula M., Grotkowska Z., Klusek I.

Progress in Plant Protection

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2010

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tom 50

|

nr 1

The aim of the study was to determine the number, weight and weed composition in the field of winter wheat grown in 2003–2005 on degraded chernozem. In a plot experiment a comparison was made of conventional and simplified presowing cultivation which included two levels of field protection against plant diseases and pests. It was proven that in conditions of fertile and being in high culture chernozem soils, the use of simplified preharvest and postharvest tillage did not increase weed infestation of winter wheat in comparison with conventional tillage. In each experimental object dominated the weed species Viola arvensis and Fallopia convolvulus.

20

Harmful entomofauna of vegetable crops occurring on fields in Poland, in 1861–2008

71%

Szwejda J.

Progress in Plant Protection

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2014

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tom 54

|

nr 1

In the years 1861–2008, on the field crops of 76 species and botanic varieties of vegetables cultivated in Poland, there were found 334 phytophagous taxons as pests belonging to 8 orders of insects: Orthoptera (1 specimen), Dermaptera (1), Thysanoptera (20), Hemiptera (64), Coleoptera (111), Hymenoptera (4), Lepidoptera (62), and Diptera (71 specimens). Between them, 25 specimens were known as pests of vegetables in XIX century in Poland. The dominant species posing a threat to plantations every year among others were: Onion thrips (Thrips tabaci Lind.), European turnished bug (Lygus rugulipennis Popp.), Bean aphid (Aphis fabae Scop.), Peach aphid [Myzus persicae (Sulz.)], Turnip ceutorhynchus (Ceutorhynchus napi Gyll.), Common silver Y moth [Autographa gamma (L.)], Damond back moth [Plutella xylostella (L.)], Carrot rust fly [Chamaepsila rosae (Fabr.)], Onion maggot [Delia antiqua (Meig.)], Cabbage root fly [D. radicum (L.)], and soil pests.

Ograniczanie wyników

Grazing exclusion effects on the relationship between species richness and vegetation cover in Mongolian grasslands

Wieloletnie zmiany fitoplanktonu letniego jako wskaznik trofii wybranych jezior

Adaptative strategy of leaf traits to drought conditions: Quercus aliena var. acuteserrata forest (The Qinling Mts. China)

Population structure of three dominant Calanus species in North Water Polynya, Baffin Bay

Spatial and seasonal variations of large tintinnid ciliates in Shenhu Bay of China

Leaf morphology shift of three dominant species along altitudinal gradient in an Alpine meadow of the Quinghai - Tibetan Plateau

Aerobic methane emission from plant: comparative study of different communities and plant species of Alpine meadow

Seed predation patterns favor the regeneration of dominant species in forest gaps compared with the understory in an oak-pine mixed forest

Vertical distribution of dominant cyanobacteria species in three lakes - evidence of tolerance to different turbulence and oxygen conditions

Trophic state assessment based on late summer phytoplankton community structure: a case study for epilimnetic lake water

Leaf stoichiometric trait and specific leaf area of dominant species in the secondary succession of the Loess Plateau

Zmiany składu gatunkowego runi w warunkach użytkowania pastwiskowego i symulowanego

Bud banks of two dominant grass species and their roles in restoration succession series of a flooded meadow

Najwazniejsze szkodniki wierzby wiciowej [Salix viminalis]

Zmiana zachwaszczenia pszenicy ozimej w zaleznosci od przedplonu w latach 1984-2001

The role of the shoreline ecotonal zone in spawning success and early life history of dominant fish species in the lowland Sulejow Reservoir

The effect of dominant species on numbers and age structure of Iris sibirica L. population on blue moor-grass meadow in Southern Poland

Skład gatunkowy i dynamika występowania zmieników w uprawie majeranku i bazylii.

Sposób wykonania uprawy przedsiewnej a zachwaszczenie łanu pszenicy ozimej

Harmful entomofauna of vegetable crops occurring on fields in Poland, in 1861–2008