Wyniki wyszukiwania

1

Peroxidases polymorphism in Ptilidium pulcherrimum (Web.) Hampe

100%

Krzakowa M., Kozlicka M.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

1988

|

tom 36

|

nr 7-9

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

The variability of natural populations of Brachypodium pinnatum and B. sylvaticum based on morphological features

86%

Paszko B.

Acta Societatis Botanicorum Poloniae

|

2008

|

tom 77

|

nr 3

255-262

The morphological diversity in 25 populations of two native species of Brachypodium occurring in Poland, was studied. Principal component analysis and cluster analysis of morphometric data segregate specimens or populations of Brachypodium into two groups, corresponding to the two species. In most of morphological characters, B. pinnatum and B. sylvaticum are similar to each other. However, in terms of characteristics, such as the hairiness of culms and leaf-sheaths both can also vary much within a single population. In comparison with B. pinnatum, B. sylvaticum always has pubescent abaxial palea surfaces. Apparent differences were not detected between the two ecotypes of B. pinnatum named "Grassland" and "Woodland".

3

Morphological differentiation of Primula veris L. pollen from natural and cultivated populations

86%

Morozowska M., Idzikowska K.

Acta Societatis Botanicorum Poloniae

|

2004

|

tom 73

|

nr 3

Micromorphological characterisation and the comparative statistical analysis of the size of Primula veris L. pollen grains collected in three natural and three cultivated populations were done. Observations were carried out with SEM. The obtained measurements were analysed with the use of one-way ANOVA, Kruskal-Wallis Test and the Student-t Test. Pollen grains from long-styled ('pin') flower-morphs were mainly 6 colpate and from shortstyled ('thrum') flower-morphs 8 colpate. Colpi of some grains from 'thrum' flowers were 'sinuous' and 'circular', and they incised into the apocolpium zone. Ornamentation of 'pin' pollen grains was microreticulate, with lumina up to 0.8 μm wide, and for pollen grains from 'thrum' flowers was reticulate and eureticulate with lumina 1.1-1.7 μm wide. In lumina of mesocolpium area some free columellae were observed. Pollen grains from 'thrum' flower-morphs were more variable in size, both in natural and in cultivated populations, than grains from 'pin' flower-morphs. The differences in mean length (P) and breadth (E) of pollen grains from 'thrum' flowers collected in cultivated populations were statistically important (FP = 3.154 for the critical F005 = 3.098; K-We = 7.469 for the critical Test value α=005 = 5.991). Pollen grains from 'thrum' flowers were bigger when coming from plants growing in natural populations (tE = 2.784 for the critical Test value α=005 = 2.001).

4

Spatial population mobility in Poland, 1952-1985

86%

Gawryszewski A.

Geographia Polonica

|

1992

|

tom 59

5

Genetic diversity of North African Thymus algeriensis in Tunisia: Population structure and implication for conservation

72%

Ben El Hadj Ali I., Guetat A., Boussaid M.

Dendrobiology

|

2012

|

tom 67

The genetic diversity within and among nine natural populations of Thymus hirtus Willd. subsp. algeriensis (Boiss. et Reut.) Murb. from different geographical and bioclimatic zones were assessed using Random Amplified Polymorphic DNA data. A total of 154 bands were generated from seven selected primers. 141 bands were polymorphic (P=91.56%). The genetic diversity within a population based on Shannon's index which was high (H'pop=0.307) and varied according to bioclimatic zones. A high genetic differentiation among populations (GST=0.335 and FST=0.296) was revealed, suggesting a population isolation and a low level of gene flow among them. The major proportion of the variation was attributable to individual differences within populations. The genetic structure is in accordance with geography distances. The Neighbour- joining tree based on Nei's and Li's genetic distance among individuals showed that individuals from each population clustered together. The UPGMA dendrogram based on FST values revealed three clusters each of them includes populations closuring to their geographical origin. The high genetic structure of populations resulted from genetic drift caused both by the habitat fragmentation and the low size of most populations. The in situ conservation should interest all populations. The ex situ conservation should be based on the collection of seeds rather within than among populations because of the maximum of variation was revealed within populations.

6

Results of research on the active species protection of the Roman snail (Helix pomatia, Linnaeus, 1758) using farmed snails in the second year of life. First season of the study

72%

Ligaszewski M., Pol P., Radkowska I., Surowka K., Lysak A.

Annals of Animal Science

|

2014

|

tom 14

|

nr 2

7

Alternative male reproductive tactics in a natural population of prairie voles Microtus ochrogaster

72%

McGuire B., Getz L. L.

Acta Theriologica

|

2010

|

tom 55

|

nr 3

261-270

Alternative reproductive tactics have been described in male mammals, but little information exists regarding fitness benefits and whether males change tactics. Adult male prairie voles Microtus ochrogaster (Wagner, 1842) display alternative tactics described as resident and wanderer. Enclosure studies provide conflicting data concerning the relative success of each tactic and whether males display one tactic throughout adulthood. To characterize further residents and wanderers in this species, we examined data collected during 5 years of monitoring a natural population in Illinois, USA. We found that during the breeding period, wandering males survived longer, moved longer distances, and were more likely than residents to have scrotal testes. During the nonbreeding period, wandering and resident males differed only in whether or not they established residency. Data on sources and fates of resident and wandering males revealed that a substantial proportion of males switched tactics. Our estimate of the reproductive contribution of wandering males to the population, which is based on the premise that wandering males typically mate with single females, suggests that wanderers contribute 34–38% of young recruited during March through October and 4–12% in November, when single females are less common. Parentage studies in natural populations are necessary to test our estimates.

8

Intraspecific differentiation of reed grass Calamagrostis arundinacea [L.] Roth [Poaceae] populations revealed by peroxidase allozymes

72%

Krzakowa M., Celka Z.

Acta Societatis Botanicorum Poloniae

|

2008

|

tom 77

|

nr 4

299-304

The genetic Variation of Reed Grass Calamagrostis arundinacea (L.) Roth was investigated in 25 populations in various geographic regions of Poland. A total of 907 individuals were sampled for electrophoretic analysis of peroxidase loci (11 allozymes). Populations were characterised by genetic parameters e.g. heterozygosity level, Wright's fixation index (F) and polymorphism coefficient (Pg). Mean values of interpopulation variability level (GST=0.0310), total genetic diversity (HT=0.4102) and gene flow between populations (Nm=7.805) were also examined. All the populations were polymorphic and they remain in Hardy Weinberg equilibrium.

9

Morphological variability of seeds and fruits of Ruscus hypoglossum in Croatia

72%

Kremer D., Karlovic K., Grubesic R. J.

Acta Biologica Cracoviensia. Series Botanica

|

2009

|

tom 51

|

nr 1

91-96

The paper reports a morphological study of fruits and seeds of Ruscus hypoglossum L., a species interesting as an ornamental plant. Initially, the length, width and weight of fruits as well as seeds were measured in 14 natural populations growing in Croatia. The length/width ratios of fruits and seeds were calculated, as well as the fruit/seed ratios of length, width and weight. Interannual differences in the analyzed traits over three years were compared in two populations. The most promising populations for further selection for ornamental use were the Bilogora population with the largest fruits (length 12.30 mm, width 11.56 mm, weight 0.75 g) and the Strahinščica population with the roundest fruits (length/width 1.04). The average number of seeds per fruit for the populations was 1.40. Variability between the three years was minor for fruit traits but significant for seed traits.

10

Vimba Vimba vimba (L.) from the Rega River - support of natural spawning in 2004-2008 and the natural population

72%

Tanski A., Czerniejewski P., Keszka S., Pender R., Pilch E.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2011

|

tom 15

The paper reports results of a study on the population of vimba in the Rega River aimed at localisation of the spawning sites and support of the natural reproduction by stocking. The spawning sites were localised with the help of electric catching and the coordinates were determined by GPS units. The fish caught to be used for artificial spawning (145 individuals) were measured (l.t. and l.c.) using an electronic calliper coupled with a PC unit. The sex of the fish was identified and on the basis of scale analysis the age and rate of length and mass increase were estimated. The backcalculation readings were made using the Rosa Lee method. The model of growth was established on the basis of the von Bertalanffy formula. Comparisons of groups of fish were drawn with the help of the nonparametric Mann Whitney U test. Correlations between variables were evaluated by analysis of regression, while the significance of the correlation coefficient was checked by t test. The rate of vimba mass increase was calculated using the modified von Bertalanffy formula was found to be described by Wt = 1215.103[1-e-0.133609(t+0.57322)]2.7559. The spawning sites of vimba localised in the Rega River section between Gryfice and Trzebiatow were concluded to be good sources of spawners for artificial spawning and the number of spawners caught in this section of the river ensures continuation of vimba restitution in the Rega River. The hitherto stocking measures aimed at restoration of vimba population have brought satisfactory results as evidenced by the age structure of the fish caught in the electric fishing in 2008.

11

RAPD analysis of genetic structure in four natural populations of Taxus baccata from southern Poland

72%

Zarek M.

Acta Biologica Cracoviensia. Series Botanica

|

2009

|

tom 51

|

nr 2

67-75

This work assessed genetic diversity and genetic structure using random amplified polymorphic DNA (RAPD) variation in 120 individuals of four natural populations of Taxus baccata growing in southern Poland (3 in mountains and one in lowland) to obtain basic information on this natural resource. With 9 primers, 185 highly reproducible and clear RAPD bands were obtained. Genetic diversity within populations was relatively high, with percentages of polymorphic bands ranging from 48.65% to 77.30%, averaging 69.59% (Shannon index 0.311). Global AMOVA showed that genetic variation between populations accounted for 26% of total variation, with the remainder (74%) occurring within population. Pairwise ΦPT values were not correlated with geographic distance. Two groups of populations were distinguished by ANOVA and principal coordinate analysis (PCO) based on a Euclidean metric: those growing in mountains (Nowa Wieś, Cisowa Gora, Zadni Gaj), with higher internal diversity, and those growing in lowlands (Liswarta), with lower internal diversity. The results are typical for an outcrossing, wind-pollinated and long-lived woody species

12

The influence of toxic cyanobacterial water blooms on the hematological indicators of silver carp [Hypophthalmichthys molitrix Val.]

72%

Kopp R., Mares J., Kubicek Z., Babica P.

Oceanological and Hydrobiological Studies

|

2005

|

tom 34

|

nr Suppl.3

13

Chromosome races of the common shrew Sorex araneus in the Ural Mts: a link between Siberia and Scandinavia?

72%

Polyakov A. V., Zima J., Searle J. B., Borodin P. M., Ladygina T.

Acta Theriologica. Supplement

|

2000

|

tom 45

|

nr 1

14

Morphological variability of testate amoebae [Rhizopoda: Testacealobosea: Testaceafilosea] in natural populations

72%

Bobrov A., Mazei Y.

Acta Protozoologica

|

2004

|

tom 43

|

nr 2

15

Melatonin action on thyroid activity in the soft-shelled turtle, Lissemys punctata punctata

72%

Sarkar S., Sarkar N. K., Bhattacharyya S., Das P.

Folia Biologica

|

1997

|

tom 45

|

nr 3-4

16

Limiting factors in the development of natural tench [ Tinca tinca [L.] ] Populations in Spanish reservoirs. A review

72%

Fernandez San Juan J.

Polskie Archiwum Hydrobiologii

|

1995

|

tom 42

|

nr 1-2

17

Pediastrum privum (Printz) Hegewald (Chlorophyceae) in Lake Male Zmarle, Northern Poland

58%

Kowalska J., Wolowski K.

Oceanological and Hydrobiological Studies

|

2010

|

tom 39

|

nr 3

18

Geographic distribution of quantitative traits variation and genetic variability in natural populations of Pinus mugo in Central Europe

58%

Boratynska K., Dzialuk A., Lewandowski A., Marcysiak K., Jasinska A. K., Sobierajska K., Tomaszewski D., Burczyk J., Boratynski A.

Dendrobiology

|

2014

|

tom 72

Divergence in genetic as well as phenotypic structures can be expected in species with disjunctive geographic ranges and restricted gene flow among isolated populations. Dwarf mountain pine has such a disjunctive geographic range in the mountains of Central Europe. We hypothesised that populations of Pinus mugo from the Giant Mts. differ from Alpine and Carpathian populations to a greater extent than differentiation within these regions; furthermore, these differences would be detectable at both the genetic and phenotypic levels. To verify this hypothesis, the diversity and differentiation within and among eleven populations from the Giant Mts., Carpathians and Alps were analysed using 19 isozyme isozyme loci, 17 needle and 15 cone morphological characters. Moreover, the data on 10 chloroplast microsatellites used in the previous study, were reanalysed. The differences between the three regions were greater than among populations within them. The microsatellites and isozymes clearly differentiated between regions, while in the multivariate analyses of cone and needle characters the Alpine and Carpathian populations were intermingled but distinct from those sampled in the Giant Mts. The significant genetic structuring among regions may result from an ancient fragmentation and long lasting geographic isolation between the Giant Mts., Alps and Tatras. The populations from the Giant Mts., the northernmost within the geographic range of P. mugo, presented lower level of genetic variation then those from the Alps and Carpathians. The pattern of genetic structure observed in dwarf mountain pine may be characteristic of wind-pollinated trees with a disjunctive geographic distribution

19

Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands

58%

Denisow B., Wrzesien M.

Acta Societatis Botanicorum Poloniae

|

2015

|

tom 84

|

nr 2

In Poland, like in other parts of Central Europe, dry grasslands significantly contribute to the biodiversity of both fauna and flora. Anthropogenic pressure impair many species of xerothermic habitats, and several populations face an increased risk of extinction. The goal of the study was to define factors that may affect the size of wild populations of Anemone sylvestris L., a protected species in Poland, with both a short- and long-term perspective, and to examine the influence of vegetation changes on the density, the abundance of flowering and male function (pollen production, pollen viability), as well as seed set. In situ observations were performed in 2005-2006 and 2011-2012 in three populations located on the Lublin Upland, SE Poland. The reduction in population density and A. sylvestris blooming was exacerbated by the expansion of the shrubs, but not by Brachypodium pinnatum. Male characteristics of A. sylvestris, i.e. pollen amount per multi-staminate flowers or pollen viability appeared to decrease under pressure of shrub competition. Populations with limitation of male function had impaired degree of seed set. Various consequences for the functioning of populations within a metapopulation system can be expected due to substantial qualitative and quantitative disorders in pollen traits. It is crucial that successful recovery programs for A. sylvestris primary should aim to conserve and manage the habitat.

20

Male and female reproductive success in natural and anthropogenic populations of Malaxis monophyllos (L.) Sw. (Orchidaceae)

58%

Jermakowicz E., Ostrowiecka B., Talalaj I., Pliszko A., Kostro-Ambroziak A.

Biodiversity: Research and Conservation

|

2015

|

tom 39

Ograniczanie wyników

Peroxidases polymorphism in Ptilidium pulcherrimum (Web.) Hampe

The variability of natural populations of Brachypodium pinnatum and B. sylvaticum based on morphological features

Morphological differentiation of Primula veris L. pollen from natural and cultivated populations

Spatial population mobility in Poland, 1952-1985

Genetic diversity of North African Thymus algeriensis in Tunisia: Population structure and implication for conservation

Results of research on the active species protection of the Roman snail (Helix pomatia, Linnaeus, 1758) using farmed snails in the second year of life. First season of the study

Alternative male reproductive tactics in a natural population of prairie voles Microtus ochrogaster

Intraspecific differentiation of reed grass Calamagrostis arundinacea [L.] Roth [Poaceae] populations revealed by peroxidase allozymes

Morphological variability of seeds and fruits of Ruscus hypoglossum in Croatia

Vimba Vimba vimba (L.) from the Rega River - support of natural spawning in 2004-2008 and the natural population

RAPD analysis of genetic structure in four natural populations of Taxus baccata from southern Poland

The influence of toxic cyanobacterial water blooms on the hematological indicators of silver carp [Hypophthalmichthys molitrix Val.]

Chromosome races of the common shrew Sorex araneus in the Ural Mts: a link between Siberia and Scandinavia?

Morphological variability of testate amoebae [Rhizopoda: Testacealobosea: Testaceafilosea] in natural populations

Melatonin action on thyroid activity in the soft-shelled turtle, Lissemys punctata punctata

Limiting factors in the development of natural tench [ Tinca tinca [L.] ] Populations in Spanish reservoirs. A review