scholarly journals Early development of late Vistulian (Weichselian) lacustrine sediments in the Żabieniec swamp (central Poland)

2012 ◽  
Vol 39 (3) ◽  
pp. 197-211 ◽  
Author(s):  
Dominik Pawłowski
Keyword(s):  
Species Composition ◽  
Developmental Stages ◽  
Cold Water ◽  
Lacustrine Sediments ◽  
Radiometric Dating ◽  
Multivariate Statistical ◽  
Central Poland ◽  
Late Vistulian ◽  
Radiocarbon Data ◽  
Two Phases

AbstractThe early sedimentological and ecological developmental stages of a late Vistulian lake in the Żabieniec swamp near Łódź (central Poland) were analysed by radiometric dating, changes in the frequency of specimens and species composition of Cladocera and multivariate statistical analysis (DCA). The longevity of the lake resulted in a fairly complete sedimentary record from approximately 22 ka to 11 ka cal BP. Species composition and the variability in the frequency of Cladocera specimens has made it possible to distinguish eleven zones of their development, which are well correlated with radiocarbon data. The results were compared to those from other sites of north and central Europe. The initial Cladocera development comprises the richest and oldest late Vistulian Cladocera record in Europe. These cladoceran assemblages show that a deep, oligotrophic, moderately cold-water lake was present at the beginning. It appears that the cladoceran development was mainly due to climate change, but also to changes in locally prevailing conditions in the water body. The high frequency of cladocerans, as well as the presence of cladoceran taxa preferring warmer water, was noted before approximately 16 ka BP. The biota suggests that the Oldest Dryas cooling was not severe and fairly variable in terms of humidity and temperature. The changes in Cladocera composition give evidence of what is described as the Intra-Bølling Cold Oscillation. It is also concluded that the Bølling is represented by two phases in the Żabieniec lake sediments.

scholarly journals Cyanobacteria microflora in a limestone spring (Troniny spring, Central Poland)

2013 ◽  
Vol 82 (3) ◽  
pp. 219-224 ◽  
Author(s):  
Paulina B. Nowicka-Krawczyk ◽  
Joanna Żelazna-Wieczorek
Keyword(s):  
Low Temperature ◽  
Species Composition ◽  
Water Chemistry ◽  
Cold Water ◽  
Physicochemical Characteristics ◽  
Population Characteristics ◽  
Central Poland ◽  
Cyanobacterial Diversity ◽  
Microhabitat Heterogeneity

The paper reports a study of cyanobacterial diversity in a cold-water limestone limnocrene in Central Poland. Samples were collected from 1998 to 2000 and in June 2012. The morphology, population characteristics and species composition of the cyanobacteria assemblages were investigated, and the frequency of taxa was recorded. The large number of taxa identified (30) reflects the microhabitat heterogeneity of this spring. Some species considered epiphytes grew on limestone rocks. The occurrence of the majority of the most frequent taxa was related to the physicochemical characteristics of the spring, but none of them can be considered obligatory crenobionts characteristic of limestone springs. The studied spring is a unique ecosystem with an interesting cyanobacteria microflora whose occurrence is attributable to the spring’s water chemistry, low temperature and variety of microhabitats.

scholarly journals The usefulness of subfossil Cladocera remains in Younger Dryas climatic reconstructions in central Poland

2017 ◽  
Vol 67 (4) ◽  
pp. 567-584 ◽  
Author(s):  
Dominik Pawłowski
Keyword(s):  
Climate Changes ◽  
Lacustrine Sediments ◽  
Younger Dryas ◽  
Oxbow Lakes ◽  
Central Poland ◽  
Cladocera Remains ◽  
Temperature Reconstructions ◽  
Two Phases ◽  
Study Sites ◽  
Geomorphological Features

Abstract Cladoceran-based paleotemperature estimates for the Younger Dryas for ten sections of paleo-oxbow lakes, valley mires, and lacustrine sediments from central Poland are presented, and their potential usefulness to climatostratigraphy is described. Most of the changes observed in the cladoceran assemblages are responses to climate changes. The cladoceran-based temperature reconstructions reflect cold conditions during the Younger Dryas (YD) and allow a division of this period into two phases: an older colder phase, between 12,800 and 12,000 cal yrs BP, and a younger, warmer phase, between ca. 12,000 and 11,500 cal yrs BP. The geomorphological features of the study sites and local environmental forces are also taken into consideration. The cladoceran-inferred summer temperature estimates from all of the study sites correspond closely with the available climate reconstruction for the YD in central Europe.

scholarly journals Untangling mechanisms of crude oil toxicity: Linking gene expression, morphology and PAHs at two developmental stages in a cold-water fish

2021 ◽  
Vol 757 ◽  
pp. 143896
Author(s):  
Elin Sørhus ◽  
Carey E. Donald ◽  
Denis da Silva ◽  
Anders Thorsen ◽  
Ørjan Karlsen ◽  
...  
Keyword(s):  
Gene Expression ◽  
Crude Oil ◽  
Developmental Stages ◽  
Cold Water ◽  
Water Fish ◽  
Oil Toxicity

MULTIVARIATE ANALYSIS OF THE POPULATION STRUCTURE OF SITONA HISPIDULUS (COLEOPTERA: CURCULIONIDAE) IN ALFALFA FIELD SOIL

1986 ◽  
Vol 118 (6) ◽  
pp. 517-524 ◽  
Author(s):  
M.A. Quinn ◽  
A.A. Hower
Keyword(s):  
Population Structure ◽  
Canonical Correlation ◽  
Developmental Stages ◽  
Root Nodules ◽  
Field Soil ◽  
Multivariate Statistical Techniques ◽  
Multivariate Statistical ◽  
Sitona Hispidulus ◽  
Small Root ◽  
Alfalfa Field

AbstractThe multivariate statistical techniques of canonical correlation and canonical redundancy analyses were used to assess the population structure of larvae of Sitona hispidulus (F.) in alfalfa field soil. A series of rhizosphere variables was correlated with a series of insect variables that represented the developmental stages of the insect to identify relationships between the insect and rhizosphere. Results indicated that 1st and 2nd-instar larvae were correlated with small root nodules and soil moisture, but not with taproot biomass. Third- and 4th-instar larvae and pupae were not correlated with any of the rhizosphere components measured. Fifth-instar larvae were associated with taproot biomass.

Growth, development and allometry of Philophthalmus nocturnus in the eyes of domestic chicks

1992 ◽  
Vol 66 (2) ◽  
pp. 100-107 ◽  
Author(s):  
V. G. M. Swarnakumari ◽  
R. Madhavi
Keyword(s):  
Growth Rate ◽  
Developmental Stages ◽  
Adult Stage ◽  
The Body ◽  
Lag Phase ◽  
Allometric Growth ◽  
Body Width ◽  
Rapid Phase ◽  
Growth Development ◽  
Two Phases

ABSTRACTFifty day-old chicks were each infected with 10 excysted metaccreariae of Philophthalimus nocturnus Looss. 1907 around each orbit and growth, development and allometry were studied. The growth rate showed two phases over a period of 35 days, a limited lag phase lasting two days post-infection in which flukes did not exceed 440 μm in length, and a rapid phase during which growth was rapid and flukes reached a size of 3·008–3·504 mm on day 35. Five developmental stages were noticed during the course of development of the metacercaria to the egg-producing adult stage. Eggs appeared in the uterus on day 14 and oculate miracidia on day 25. The hindhody, testes and ovary showed positive allometric growth, the pharnyx less so, whereas negative allometric growth was shown by the forebody. Body width, oral sucker and ventral sucker were close to isometry, growing at the same rate as the body length.

scholarly journals Visualization of replication initiation and elongation in Drosophila

2002 ◽  
Vol 159 (2) ◽  
pp. 225-236 ◽  
Author(s):  
Julie M. Claycomb ◽  
David M. MacAlpine ◽  
James G. Evans ◽  
Stephen P. Bell ◽  
Terry L. Orr-Weaver
Keyword(s):  
Dna Replication ◽  
Origin Recognition Complex ◽  
Developmental Stages ◽  
Replication Initiation ◽  
Nuclear Antigen ◽  
Minichromosome Maintenance ◽  
Egg Chamber ◽  
Two Phases ◽  
Replication Factors

Chorion gene amplification in the ovaries of Drosophila melanogaster is a powerful system for the study of metazoan DNA replication in vivo. Using a combination of high-resolution confocal and deconvolution microscopy and quantitative realtime PCR, we found that initiation and elongation occur during separate developmental stages, thus permitting analysis of these two phases of replication in vivo. Bromodeoxyuridine, origin recognition complex, and the elongation factors minichromosome maintenance proteins (MCM)2–7 and proliferating cell nuclear antigen were precisely localized, and the DNA copy number along the third chromosome chorion amplicon was quantified during multiple developmental stages. These studies revealed that initiation takes place during stages 10B and 11 of egg chamber development, whereas only elongation of existing replication forks occurs during egg chamber stages 12 and 13. The ability to distinguish initiation from elongation makes this an outstanding model to decipher the roles of various replication factors during metazoan DNA replication. We utilized this system to demonstrate that the pre–replication complex component, double-parked protein/cell division cycle 10–dependent transcript 1, is not only necessary for proper MCM2–7 localization, but, unexpectedly, is present during elongation.

Proteocephalus neglectus as a possible indicator of changes in the ecological balance of aquatic environments

1992 ◽  
Vol 66 (1) ◽  
pp. 17-24 ◽  
Author(s):  
V. Hanzelová
Keyword(s):  
Species Composition ◽  
Oncorhynchus Mykiss ◽  
Seasonal Dynamics ◽  
Developmental Stages ◽  
Copepod Species ◽  
Aquatic Environments ◽  
Copepod Community ◽  
Ecological Relationships ◽  
Predominant Species ◽  
Cyclops Vicinus

ABSTRACTIn an environment seriously impaired by human interference (draining the reservoir), ecological relationships in a community of copepods and their impact on the transmission of the tapeworm Proteocephalus neglectus La Rue. 1911 were studied. The impairment of the environment resulted in changes in the species composition of the copepod community and in the increased diversity of the copepod species, as well as in a multiple inversion of the dominant and subdominant relationships of the two most numerous copepod species (Cyclops vicinus and Eudiaptomus zachariasi). The structure of the developmental stages of the copepod community, the seasonal dynamics of the number of copepods and the abundance of P. neglectus procercoids have changed. The predominant species in the copepod community and the most susceptible intermediate host of P. neglectus (C. vicinus) was not infected. The infection of copepods decreased by 95% and that of the definitive hosts (Oncorhynchus mykiss) by 97·5% compared with the index values recorded in the previous year.

Oxygen-isotope geothermometers in lacustrine sediments: New insights through combined δ18O analyses of aquatic cellulose, authigenic calcite and biogenic silica in Lake Gościąż, central Poland

2010 ◽  
Vol 74 (10) ◽  
pp. 2957-2969 ◽  
Author(s):  
Kazimierz Rozanski ◽  
Monika A. Klisch ◽  
Przemyslaw Wachniew ◽  
Zbigniew Gorczyca ◽  
Tomasz Goslar ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Biogenic Silica ◽  
Lacustrine Sediments ◽  
Central Poland

scholarly journals Bat assemblages in fragmented forest complexes near Rogów (central Poland)

2018 ◽  
Vol 79 (3) ◽  
pp. 253-260
Author(s):  
Grzegorz Lesiński ◽  
Jakub Gryz ◽  
Aleksander Rachwald ◽  
Dagny Krauze-Gryz
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Field Work ◽  
Fragmented Forest ◽  
Central Poland ◽  
Nyctalus Leisleri ◽  
Large Populations ◽  
Myotis Daubentonii ◽  
Fragmented Forests ◽  
Eptesicus Serotinus

Abstract Habitat fragmentation affects bat assemblages living in forests by changing species composition, species richness and population densities. The aim of this paper was to determine the structure of bat assemblages in fragmented forests of central Poland (Experimental Forest Station SGGW in Rogów) based on data concerning bat fauna of this area. Our work is based on published as well as unpublished data collected between 2011–2017 and the two main methods employed during field work were: (1) evening and night bat netting, (2) detection of flying bats on transects or in points by using ultrasound detectors. 16 bat species were observed with the most common ones being serotine bat Eptesicus serotinus (Schreb.), common noctule Nyctalus noctula (Schreb.) and brown long-eared bat Plecotus auritus (l.). less numerous in overall but frequently observed in some sites were the western barbastelle Barbastella barbastellus (Schreb.) and the Daubenton's bat Myotis daubentonii (Kuhl). The following species occurred rarely: greater mouse-eared bat Myotis myotis (Bork.), Natterer's bat M. nattereri (Kuhl), whiskered bat M. mystacinus (Kuhl), Brandt's bat M. brandtii (evers.), northern bat Eptesicus nilssonii (Keys. & Blas.) parti-coloured bat Vespertilio murinus l., lesser noctule Nyctalus leisleri (Kuhl), common pipistrelle Pipistrellus pipistrellus (Schreb.), nathusius' pipistrelle P. nathusii (Keys. & Blas.), soprano pipistrelle P. pygmaeus (leach) and grey long-eared bat Plecotus austriacus (Fish.). Fragmented forests of the study area did not differ significantly in terms of bat species composition from other fragmented forests of central Poland (Płońsk Plain) nor the large forest complexes of the Bolimowska and Kampinoska Forests. In this study area, however, bat assemblages were characterized by a lower relative abundance of the common noctule and a higher relative abundance of the serotine bat as compared to assemblages in other forests of central Poland. In conclusion, the forest fragmentation near Rogów does not significantly affect bat richness and fertilized habitats are suitable for relatively large populations of species such as the western barbastelle and lesser noctule.

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