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Seasonality of water chemistry, carbonate production, and biometric features of two species of Chara in a shallow clear water lake.

Pukacz A, Pełechaty M, Frankowski M, Kowalski A, Zwijacz-Koszałka K - ScientificWorldJournal (2014)

Bottom Line: The percentage of calcium carbonates in dry mass did not differ significantly between the species and exceeded 60%, reaching the maximum (76% in C. polyacantha) in July and August.For both species, distinct correlations between the structure of biomass and morphological features were found.The obtained results show the great importance of charophyte vegetation in carbon cycling and functioning of lake ecosystems.

View Article: PubMed Central - PubMed

Affiliation: Polish-German Research Institute, Collegium Polonicum, Kościuszki 1, 69-100 Słubice, Poland.

ABSTRACT
The objective of this study was to analyze the temporal variability of biometric features and the carbonate production of two charophytes: Chara polyacantha A. Braun and Chara rudis A. Braun against the background of the physical-chemical properties of water. The investigation was carried out in a small, mid-forest Lake Jasne (western Poland). It is a polymictic, mesotrophic, hardwater ecosystem dominated by charophyte vegetation. Each month, 10 individuals of each species were characterized in terms of morphometric features, fresh and dry weight, and the percentage of calcium carbonate. Additionally, physical-chemical parameters of the water were studied. The results of physical-chemical analyses indicated similar habitat conditions for both species. Despite smaller dry weight C. polyacantha was characterized by greater morphological variability and higher rates of growth and percentage share of calcium carbonate in dry mass than C. rudis. The percentage of calcium carbonates in dry mass did not differ significantly between the species and exceeded 60%, reaching the maximum (76% in C. polyacantha) in July and August. For both species, distinct correlations between the structure of biomass and morphological features were found. The obtained results show the great importance of charophyte vegetation in carbon cycling and functioning of lake ecosystems.

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Related in: MedlinePlus

Location of Lake Jasne (mid-western Poland) and distribution of the sampling sites: P: pelagial, CP: C. polyacantha, and CR: C. rudis.
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Related In: Results  -  Collection


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fig1: Location of Lake Jasne (mid-western Poland) and distribution of the sampling sites: P: pelagial, CP: C. polyacantha, and CR: C. rudis.

Mentions: The study was conducted in a small, mid-forest Lake Jasne (λ-15°02′11′′, ϕ-52°17′36′′), located in mid-western Poland (Figure 1). The human pressure within the lake is low. Over 90% of the drainage basin is covered by forests (mostly pine forests), which is an important isolating factor due to highly inclined slopes. It belongs to the group of shallow, polymictic lakes, with no fully developed vertical stratification. According to Pelechaty et al. [35], it is one of the clearest lakes within the Lubuskie region. The results of physicochemical analyses of pelagial surface water performed during the vegetation season (month-to-month data, from April to October) evidenced that Lake Jasne was characterized by high transparency and low values of nutrient concentrations, typical for mesotrophic, moderately hard water ecosystems (Table 1).


Seasonality of water chemistry, carbonate production, and biometric features of two species of Chara in a shallow clear water lake.

Pukacz A, Pełechaty M, Frankowski M, Kowalski A, Zwijacz-Koszałka K - ScientificWorldJournal (2014)

Location of Lake Jasne (mid-western Poland) and distribution of the sampling sites: P: pelagial, CP: C. polyacantha, and CR: C. rudis.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4221869&req=5

fig1: Location of Lake Jasne (mid-western Poland) and distribution of the sampling sites: P: pelagial, CP: C. polyacantha, and CR: C. rudis.
Mentions: The study was conducted in a small, mid-forest Lake Jasne (λ-15°02′11′′, ϕ-52°17′36′′), located in mid-western Poland (Figure 1). The human pressure within the lake is low. Over 90% of the drainage basin is covered by forests (mostly pine forests), which is an important isolating factor due to highly inclined slopes. It belongs to the group of shallow, polymictic lakes, with no fully developed vertical stratification. According to Pelechaty et al. [35], it is one of the clearest lakes within the Lubuskie region. The results of physicochemical analyses of pelagial surface water performed during the vegetation season (month-to-month data, from April to October) evidenced that Lake Jasne was characterized by high transparency and low values of nutrient concentrations, typical for mesotrophic, moderately hard water ecosystems (Table 1).

Bottom Line: The percentage of calcium carbonates in dry mass did not differ significantly between the species and exceeded 60%, reaching the maximum (76% in C. polyacantha) in July and August.For both species, distinct correlations between the structure of biomass and morphological features were found.The obtained results show the great importance of charophyte vegetation in carbon cycling and functioning of lake ecosystems.

View Article: PubMed Central - PubMed

Affiliation: Polish-German Research Institute, Collegium Polonicum, Kościuszki 1, 69-100 Słubice, Poland.

ABSTRACT
The objective of this study was to analyze the temporal variability of biometric features and the carbonate production of two charophytes: Chara polyacantha A. Braun and Chara rudis A. Braun against the background of the physical-chemical properties of water. The investigation was carried out in a small, mid-forest Lake Jasne (western Poland). It is a polymictic, mesotrophic, hardwater ecosystem dominated by charophyte vegetation. Each month, 10 individuals of each species were characterized in terms of morphometric features, fresh and dry weight, and the percentage of calcium carbonate. Additionally, physical-chemical parameters of the water were studied. The results of physical-chemical analyses indicated similar habitat conditions for both species. Despite smaller dry weight C. polyacantha was characterized by greater morphological variability and higher rates of growth and percentage share of calcium carbonate in dry mass than C. rudis. The percentage of calcium carbonates in dry mass did not differ significantly between the species and exceeded 60%, reaching the maximum (76% in C. polyacantha) in July and August. For both species, distinct correlations between the structure of biomass and morphological features were found. The obtained results show the great importance of charophyte vegetation in carbon cycling and functioning of lake ecosystems.

Show MeSH
Related in: MedlinePlus