Seasonal Changes in the Content of Photosynthetic Pigments of Dominant Macrophytes in the Bardača Fishpond Area

Abstract

In this paper, changes in the content of photosynthetic pigments during the vegetation season in the leaves of Phragmites communis Trin., Salvinia natans (L.) All., Trapa natans L. and Utricularia vulgaris L. in the area of Bardača fishpond (Sinjak pond) were monitored. Physical and chemical characteristics of water are defined in order to determine their association with the content of photosynthetic pigments. The obtained results indicate the specificity in the content of photosynthetic pigments between aquatic macrophytes and significant variations during the vegetation season. The maximum content of pigments was determined in the leaves of the emerged species, while the minimum content was measured in the submerged and floating leaves. The investigated macrophytic species showed a similar trend in the total chlorophyll content during the vegetation period; with two maximums recorded – May and September, while the minimum values were recorded with the senescence process (October). Total chlorophyll and carotenoids were in a negative correlation with temperature, pH, saturation, water transparency and orthophosphate content in water. On the other hand, they were in a positive correlation with the content of nitrates in water. The correlation analysis of the physical and chemical parameters of water quality and the concentration of macrophytes photosynthetic pigments showed a significant influence of certain abiotic factors on the photosynthetic pigments’ content in the leaves of Phragmites communis Trin., Salvinia natans (L.) All., Trapa natans L. and Utricularia vulgaris L.

Spatiotemporal environmental monitoring of the karst-related Almyros Wetland (Heraklion, Crete, Greece, Eastern Mediterranean)

“…Generally, ammonium in natural waters is present in very low amounts due to the degradation of nitrogen compounds by microbes (Maksimović et al, 2020 ). Ammonium levels higher than 0.1 mg/L, as in the present case (Fig.…”

“…Chlorophyll-a and -b increase at the beginning of the summer and in autumn can be explained by the availability of nutrients (Kitajima & Hogan, 2003 ; Wetzel, 2001 ). The maximum increase in chlorophyll-a in summer and autumn and the phosphorus levels, which were highest in autumn, represent nutrient sinks for inorganic nutrients (Pingree et al, 1977 ), and the sudden decrease in chlorophyll-c in summer could be due to stress from high temperatures (Maksimović et al 2020 ).…”

Content of photosynthetic pigments in Phragmites communis (Cav.) Trin. ex Steud., Salvinia natans L. (All.), Utricularia vulgaris L. and Ceratophyllum demersum L. during the season in the area of the Bardača pond (Republika Srpska)

“…Photosynthetic pigments, especially chlorophylls, are indicators of photosynthetic activity, growth, development and yield of plants (Nikolić et al, 2009;Dar et al, 2013;Maksimović et al, 2020b). Changes in the concentration of photosynthetic pigments are important indicators of the physiological status of plants.…”

Multi-Scale Spectral Separability of Submerged Aquatic Vegetation Species in a Freshwater Ecosystem

“…The Chl-a reflectance peak, referred to as the green peak (∼550 nm) was the primary contributor to spectral separability for most OTUs during the peak-growing season when plants invest in Chl-a production. Chl-a absorptance was comparatively unimportant later in the summer when Chl-a is less abundant due to increased shading (Maksimović et al, 2020) and plants redirect resources toward accessory pigments (Salisbury and Ross, 1992). This temporal variability in relative pigment abundance also explains the substantial increase in moderately to highly ranked features in the red and red edge regions (650-710 nm).…”