Ecological Diversity of Bryophytes on Tree Trunks in Protected Forests (A Case Study from Central Poland)

Herzogia ◽  
2015 ◽  
Vol 28 (1) ◽  
pp. 87-103 ◽  
Author(s):  
Ewa Fudali ◽  
Grzegorz J. Wolski
2007 ◽  
Vol 29 (4) ◽  
pp. 135-153 ◽  
Author(s):  
Soumya Mohan ◽  
P. K. Ramachandran Nair ◽  
Alan J. Long

2018 ◽  
Vol 67 (1) ◽  
pp. 41-57
Author(s):  
Monika Dec ◽  
Marcin Polkowski ◽  
Tomasz Janik ◽  
Krystyna Stec ◽  
Marek Grad

Biologia ◽  
2007 ◽  
Vol 62 (2) ◽  
Author(s):  
Sulejman Redžić

AbstractSyntaxonomic diversity (SD) represents the number of plant communities (phytocoenoses) in certain area. Plant communities as organized systems of populations of various coexisting plant species inhabiting same or similar habitat in the function of time. SD is one of the best indicators of the state and potential carrying capacity of every ecosystem and an attribute of total ecological diversity. In general, level of syntaxonomic diversity indicates habitat heterogeneity and diversity. This could have significant importance in the categorization of habitat values in accordance with European Nature Information System (EUNIS) criteria. The results presented in this paper indicate without any doubt high natural values of mountain range Vranica in Bosnia and Herzegovina. One of the best proofs is an extremely high level of syntaxonomic diversity. In this area covering just 288 km2, vegetation is differentiated into 9 formations, 28 classes, 44 orders, 73 alliances and 165 associations. This represents 85% of all classes, 73% of all orders, 65% of all alliances, and 53% of all associations of vegetation in Bosnia and Herzegovina, or 35% of all classes in vegetation diversity in Europe. Going from the level of class to the level of order, the number of syntaxa increases for 61%, from order to alliance for 60%, and from alliance to association for 44.24% (average 55%). SD index is very high and it is 0.5729. This means that on each km2 contains 0.5729 syntaxa.


2020 ◽  
Vol 57 ◽  
pp. 59-71
Author(s):  
Barbara Fojcik ◽  
Damian Chmura

The vertical distribution of epiphytic bryophytes in European forests are still relatively poorly understood. The aim of the study was to analyse the diversity and vertical zonation of epiphytic mosses and liverworts on selected tree types (Quercus petraea, Betula pendula and Pinus sylvestris) within windthrow areas in the Kampinoski National Park (Central Poland). The investigations were performed in five parts of the trees: the tree base, lower trunk, upper trunk, lower crown, and upper crown. Deciduous trees have more species than pine trees (13 on Quercus and Betula, 8 on Pinus). The type of phorophyte was crucial for the differences in the species composition from the tree base to the upper crown that was observed. The highest richness of bryophytes was recorded on the tree bases, while the lowest was recorded in the upper parts of the crowns. The variability of the habitat conditions in the vertical gradient on the trunk that affected the patterns of the occurrence of species with different ecological preferences was determined using the Ellenberg indicator values. An increase in the value of the light and acidity indicators from the base of the trunk upwards and decreasing tendency in the case of moisture indicator was noted.


2020 ◽  
Vol 18 (1) ◽  
pp. 61-71
Author(s):  
Andrzej Araźny ◽  
Edward Łaszyca

AbstractThe article describes the occurrence of selected weather phenomena that are hazardous to aviation (thunderstorms, hail, fog and glaze) in Bydgoszcz. The work employs 1971–2010 data from the Bydgoszcz-Airport meteorological station. The hazardous atmospheric phenomena selected for analysis hinder or sometimes even prevent aviation. Of the analysed weather phenomena in Bydgoszcz, those most hazardous to aviation are fog and thunderstorms. The average annual numbers of days featuring them exceed 71 and 14, respectively. The analysis shows that statistically significant threats to aviation have decreased, e.g. number of days with fog (by 4.76 days/10 yrs) and days with thunderstorms (by 1.68 days/10 yrs). However, no clear trends can be seen for the number of days with hail (decrease of 0.14 days/10 yrs) and days with glaze (an increase of 0.16 days/10 yrs).


Sign in / Sign up

Export Citation Format

Share Document