Abstract
The availability of light is one of the most important environmental factors influencing the floristic diversity of spring niches, especially in the specific conditions of deep, karst valleys occurring in the Ojców National Park (southern Poland). The aim of this study was to investigate the influence of solar radiation reaching the karst spring niches, on selected physiological parameters of the spring mosses: Cratoneuron filicinum (Hedw.) Spruce (obligatory krenophyte) and Brachythecium rivulare Schimp. (facultative krenophyte). The five karst spring niches (4 in the Prądnik Valley, 1 in the Sąspowska Valley) were selected for the plant material collection, in which two of the moss species tested occurred simultaneously. On sunny days, measurements of total and reflected radiation as well as the radiation balance in the full spectrum range over the vegetation were made. The temperature was measured for air, water, and on the surface and inside the plants. The collected biological material was subjected to laboratory analysis. Fresh mass of moss gametophytes was significantly the highest from plants growing on stand 5 (intermediate values of light and temperature parameters), and the lowest from mosses on stands 1 and 2 (including lowest air temperatures). Dry mass varied depending on the species and stand. The percentage of water in B. rivulare was highest in plants from stand 4 (highest air and water temperature), and in C. filicinum from stand 5. Significantly the lowest values of this parameter were found for plants growing in stand 2 (lowest temperature of water). The electrolytes leakage from moss cells was specific and depended on the species. The greatest destabilisation of cell membranes was demonstrated in plants harvested from stands 1 and 2, where it was the coldest. The fluorescence of chlorophyll a varied depending on the moss species and the habitat of spring niches. This paper, presenting of preliminary results, is a kind of introduction to wider research in this topic.
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Claims 8
Claim · model-written summary
Fresh moss gametophyte mass was highest at stand 5 and lowest at stands 1 and 2.
Verbatim
t0“mosses”
e0“Fresh mass of moss gametophytes was significantly the highest from plants growing on stand 5 (intermediate values of light and temperature parameters), and the lowest from mosses on stands 1 and 2 (including lowest air temperatures)”
Claim · model-written summary
Dry mass varied by species and stand.
Verbatim
t0“mosses”
e0“Dry mass varied depending on the species and stand”
Claim · model-written summary
B. rivulare water percentage was highest at stand 4.
- Taxon
- B. rivulare
Brachythecium rivularee0 - Outcome
- percentage of watere0
- Direction
- higheste0
- Setting
- stand 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mosses”
e0“The percentage of water in B. rivulare was highest in plants from stand 4 (highest air and water temperature)”
Claim · model-written summary
C. filicinum water percentage was highest at stand 5.
- Taxon
- C. filicinum
_5782.jpg?width=60)
Cratoneuron filicinume0 - Outcome
- C. filicinum from stand 5e0
- Setting
- stand 5e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_5782.jpg?width=500)
Verbatim
t0“mosses”
e0“and in C. filicinum from stand 5”
Claim · model-written summary
Water percentage was lowest at stand 2.
- Taxon
- plantsViridiplantaee0
- Outcome
- values of this parametere0
- Direction
- loweste0
- Setting
- stand 2e0
Verbatim
t0“mosses”
e0“Significantly the lowest values of this parameter were found for plants growing in stand 2 (lowest temperature of water)”
Claim · model-written summary
Electrolyte leakage depended on moss species.
Not reportedDirection
Verbatim
t0“mosses”
e0“The electrolytes leakage from moss cells was specific and depended on the species”
Claim · model-written summary
Cell membranes were most destabilized in plants from the coldest stands.
- Taxon
- plantsViridiplantaee0
- Outcome
- destabilisation of cell membranese0
- Direction
- greateste0
- Setting
- stands 1 and 2e0
Verbatim
t0“mosses”
e0“The greatest destabilisation of cell membranes was demonstrated in plants harvested from stands 1 and 2, where it was the coldest”
Claim · model-written summary
Chlorophyll a fluorescence varied by moss species and spring habitat.
Verbatim
t0“mosses”
e0“The fluorescence of chlorophyll a varied depending on the moss species and the habitat of spring niches”