scholarly journals The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

2015 ◽  
Author(s):  
Wojciech Ejankowski ◽  
Tomasz Lenard
Keyword(s):  
Physicochemical Parameters ◽  
Aquatic Vegetation ◽  
Myriophyllum Spicatum ◽  
Ice Cover ◽  
Water Transparency ◽  
Ceratophyllum Demersum ◽  
Total Biomass ◽  
Eutrophic Lakes ◽  
Macrophyte Species ◽  
Tn:Tp Ratio

<p>The physicochemical parameters of water, the concentration of chlorophyll-<em>a</em> and the submerged aquatic vegetation (SAV) were studied to evaluate the effects of different winter seasons on the biomass of macrophytes in shallow eutrophic lakes. We hypothesised that a lack of ice cover or early ice-out can influence the physicochemical parameters of water and thus change the conditions for the development of phytoplankton and SAV. The studies were conducted in four lakes of the Western Polesie region in mid-eastern Poland after mild winters with early ice-out (MW, 2011 and 2014) and after cold winters with late ice-out (CW, 2010, 2012 and 2013). The concentrations of soluble and total nitrogen, chlorophyll-<em>a</em> and the TN:TP ratio in the lakes were considerably higher, whereas the concentration of soluble and total phosphorus and water transparency were significantly lower after the MW compared with after the CW. No differences were found in water temperature, reaction and electrolytic conductivity. Low water turbidity linked with low concentration of chlorophyll-<em>a</em> after the CW resulted in increased water transparency and the total biomass of the SAV. The negative effect of the MW on the macrophyte species was stronger on more sensitive species (<em>Myriophyllum spicatum</em>,<em> Stratiotes aloides</em>) compared with shade tolerant <em>Ceratophyllum demersum</em>. Our findings show that the ice cover phenology affected by climate warming can change the balance between phytoplankton and benthic vegetation in shallow eutrophic lakes, acting as a shift between clear and turbid water states. We speculate that various responses of macrophyte species to changes in the water quality after two winter seasons (CW and MW) could cause alterations in the vegetation biomass, particularly the expansion of shade tolerance and the decline of light-demanding species after a series of mild winters.</p>

scholarly journals A small omnivore fish (Acheilognathus macropterus) reduces both growth and biomass of submerged macrophytes: implications for shallow lake restoration

2020 ◽  
pp. 34
Author(s):  
Jinlei Yu ◽  
Manli Xia ◽  
Wei Zhen ◽  
Hu He ◽  
Ruijie Shen ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Submerged Macrophytes ◽  
Myriophyllum Spicatum ◽  
Nutrient Concentrations ◽  
Ceratophyllum Demersum ◽  
Total Biomass ◽  
Relative Growth ◽  
Macrophyte Community ◽  
Macrophyte Species ◽  
Significant Research

Transplantation of submerged macrophytes has been widely used to improve water quality in restoring shallow lakes in China. However, in some lakes, small omnivorous fish predominated the fish assemblages and fed mainly on submerged macrophytes. Despite significant research examining grazing selectivity in herbivorous fishes, macrophyte feeding preferences of small omnivorous fishes are poorly understood. We conducted a mesocosm experiment to examine the effects of a prolific small omnivorous bitterling fish Acheilognathus macropterus on the relative growth rate (RGR) and biomass of submerged macrophytes (Ceratophyllum demersum, Myriophyllum spicatum, Vallisneria denseserrulata, and Hydrilla verticillata). Our results showed that the presence of A. macropterus significantly increased nutrient concentrations (e.g. total nitrogen and total phosphorus). The RGR of C. demersum in the bitterling-present treatment was significantly lower than the controls, in the presence of other macrophyte species. Further, total biomass of the four species of macrophytes in the fish-present mesocosms was markedly lower than in the fish-absent treatment, suggesting considerable consumption of macrophytes by bitterling. Moreover, the percent biomass of V. denserrulata and H. verticillata were significantly enhanced by the presence of bitterling. Our findings suggest that A. macropterus may increase nutrient concentrations through excretion and reduce the biomass and RGR of certain submerged macrophytes which may shift macrophyte community structure via selective grazing.

scholarly journals Long-term changes in the flora and vegetation of Lake Mikołajskie (Poland) as a result of its eutrophication

2014 ◽  
Vol 70 (4) ◽  
pp. 323-334 ◽  
Author(s):  
Barbara Solińska-Górnicka ◽  
Ewa Symonides
Keyword(s):  
Species Richness ◽  
New Species ◽  
Aquatic Vegetation ◽  
Submerged Macrophytes ◽  
Water Transparency ◽  
Habitat Conditions ◽  
Long Term Changes ◽  
Macrophyte Species ◽  
Consequent Increase

Changes in littoral flora as well as aquatic and swamp vegetation were analysed with increasing eutrophication of the mesotrophic Lake Mikołajskie. Over 30 years the habitat conditions of the lake deteriorated and the phy-tolittoral was reduced from a zone 6 metres wide to one of only 2 metres. In addition, the number of submerged macrophyte species decreased by 50% and the frequency of most of the remaining species declined severalfold. No new species were encountered. Species retreating from the lake littoral included all <em>Chara</em> species, <em>Potamogeton obtusifolius</em>, <em>P. natans</em> and <em>Hydrocharis morsus-ranae</em>. A significant lowering of the phytosociological diversity and species richness of aquatic and swamp communities was observed. By 1994, six of the 12 associations identified in 1964 and representing the submerged and floating-leaved vegetation (e.g. <em>Nitellopsidetum ubtusae</em>, <em>Charetum asperae</em> and <em>Potamogetonetum compressi</em>) were no longer present. In turn, 6 swamp communities from among the original 14 identified in the lake were lacking (e.g. <em>Typhetum angustifoliae</em>, <em>Sugittario-Sparganietum emersi</em> and <em>Eleocharitetum palustris</em>). At the same time, two new aquatic and swamp communities appeared (<em>Ranunculetum circinuti</em>, <em>Myriophylletum spicati</em>, <em>Caricetum acutiformis</em> and <em>Caricetum distichae</em>). In contrast there was an increase in the species richness of reedswamp communities due to an influx of marshland species. While the 1990s witnessed a distinct decrease in concentrations of nutrients in Lake Mikołajskie, the consequent increase in water transparency was not associated with an increase in the area of submerged macrophytes, or the species richness of aquatic vegetation.

Biogeochemical specialization of macrophytes and their role as a biofilter in the Selenga delta

2019 ◽  
Vol 12 (3) ◽  
pp. 240-263 ◽  
Author(s):  
G. L. Shinkareva ◽  
M. Yu. Lychagin ◽  
M. K. Tarasov ◽  
J. Pietroń ◽  
M. A. Chichaeva ◽  
...  
Keyword(s):  
Aquatic Vegetation ◽  
Chemical Elements ◽  
Myriophyllum Spicatum ◽  
Ceratophyllum Demersum ◽  
Higher Aquatic Vegetation ◽  
Potamogeton Perfoliatus ◽  
Vegetation Species ◽  
Dissolved Form ◽  
Suspended Form ◽  
Weak Accumulation

This study aims to evaluate the biofiltration ability of higher aquatic vegetation of the Selenga delta as a barrier for heavy metals and metalloids (HMM) flows into the Lake Baikal. Main aquatic vegetation species have been collected from deltaic channels and inner lakes: Nuphar pumila, Potamogeton perfoliatus, P. pectinatus, P. natans, P. friesii, Butomus umbellatus, Myriophyllum spicatum, Ceratophyllum demersum, Phragmites australis. Analysis of the obtained data showed that regardless of the place of growth hydatophytes spiked water-milfoil (M. spicatum) and the fennel-leaved pondweed (P. pectinatus) most actively accumulate metals. Opposite tendencies were found for helophytes reed (Ph. australis) and flowering rush (B. umbellatus), which concentrate the least amount of elements. This supports previous findings that the ability to concentrate HMM increases in the series of surface – floating – submerged plants. Regarding river water, the studied macrophyte species are enriched with Mn and Co, regarding suspended matter – Mo, Mn and B, regarding bottom sediments – Mn, Mo and As. We identified two associations of chemical elements: S-association with the predominant suspended form of migration (Be, V, Co, Ni, W, Pb, Bi, Mn, Fe and Al) and D-association with the predominant dissolved form of migration (B, U, Mo, Cr, Cu, Zn, As, Cd, Sn and Sb). Due to these associations three groups of macrophytes were distinguished – flowering rush and reed with a low HMM content; small yellow pond-lily and common floating pondweed with a moderate accumulation of S-association and weak accumulation of D-association elements; and clasping-leaved pondweed, fennel-leaved pondweed, and pondweed Friesii accumulating elements of both S and D groups. The results suggest that macrophytes retain more than 60% of the total Mn flux that came into the delta, more than 10% – W, As, and from 3 to 10% B, Fe, Co, Mo, Cd, V, Ni, Bi, Be, Cu, Zn, Cr, U, Al. The largest contribution is made by the group of hydatophytes (spiked water-milfoil and pondweed), which account for 74 to 96% of the total mass of substances accumulated by aquatic plants.

Growth inhibition of blue-green algae by allelopathic effects of macrophytes

1999 ◽  
Vol 39 (8) ◽  
pp. 47-53 ◽  
Author(s):  
Satoshi Nakai ◽  
Yutaka Inoue ◽  
Masaaki Hosomi ◽  
Akihiko Murakami
Keyword(s):  
Growth Inhibition ◽  
Green Algae ◽  
Myriophyllum Spicatum ◽  
Ceratophyllum Demersum ◽  
Inhibitory Effects ◽  
Potamogeton Crispus ◽  
Blue Green Algae ◽  
Macrophyte Species ◽  
Allelopathic Compounds ◽  
Significant Growth Inhibition

Inhibitory effects of macrophytes on the growth of blue-green algae (i.e. Microcystis aeruginosa, Anabaena flos-aquae, or Phormidium tenue) were evaluated in a coexistence culture system in which concentrations of different macrophyte species were varied (i.e. Egeria densa, Cabomba caroliniana, Myriophyllum spicatum, Ceratophyllum demersum, Eleocharis acicularis, Potamogeton oxyphyllus, Potamogeton crispus, Limnophila sessiliflora, or Vallisneria denseserrulata). Coexistence assay results showed that only the macrophytes C. caroliniana or M. spicatum inhibited the growth of all blue-green algae, with the inhibitory effects of M. spicatum being stronger than those of C. caroliniana and being produced by the release of allelopathic compounds. In subsequent initial addition assays using M. spicatum with the alga M. aeruginosa, no significant growth inhibition was observed; whereas, in contrast, quasi-continuous addition assays showed strong growth inhibition by M. spicatum. These results provide the first evidence that unstable, growth-inhibiting allelopathic compounds are continuously secreted by M. spicatum.

scholarly journals Effects of Sediments Phosphorus Inactivation on the Life Strategies of Myriophyllum spicatum: Implications for Lake Restoration

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2112
Author(s):  
Zhenmei Lin ◽  
Chen Zhong ◽  
Guolong Yu ◽  
Yishu Fu ◽  
Baohua Guan ◽  
...  
Keyword(s):  
Shallow Lakes ◽  
Root Biomass ◽  
Submerged Macrophytes ◽  
Myriophyllum Spicatum ◽  
Morphological Characteristics ◽  
Shoot Biomass ◽  
Lake Ecosystem ◽  
Total Biomass ◽  
Life Strategies ◽  
Eutrophic Lakes

Eutrophication often results in the loss of submerged vegetation in shallow lakes and turns the lake to be a turbid state. Recovery of submerged macrophytes is the key in the restoration of shallow eutrophic lakes to create a clear water state. However, internal loading control was considered as the critical process for the recovery of submerged macrophytes in shallow lakes after the external nutrient reduction. Phoslock® (Lanthanum modified bentonite) is a useful passivation material in controlling the internal loadings (release of phosphorus from the sediments), which was applied to restore the eutrophic lakes. However, the effects of Phoslock® on the growth and life strategies of submerged macrophytes are less focused so far. In the present study, we studied the responses in the growth and morphological characteristics of Myriophyllum spicatum to the addition of Phoslock® to the sediments. Our results showed that the addition of Phoslock® significantly decreased the contents of bioavailable forms of phosphorus in the sediments, such as redox-sensitive phosphorus bound to Fe and Mn compounds (BD–P), phosphorus bound to aluminum (Al–P) and organic phosphorus (Org–P). However, the concentration of the non-bioavailable forms of phosphorus in the sediments, such as calcium bound phosphorus (Ca–P), increased significantly in the Phoslock® treatments compared with the controls. At the end of the experiments, the total biomass, aboveground biomass and relative growth rate (RGR) of M. spicatum decreased significantly in the Phoslock® mesocosms compared with the controls. In contrast, the wet root biomass, root–shoot biomass ratio, root numbers and root length of M. spicatum were significantly higher in the Phoslock® treatments than that in the controls. Our results indicated that the growth of M. spicatum was suppressed by the addition of Phoslock®, and thus the biomass was decreased; however, the increase of root biomass might be beneficial to the inhibition of phosphorus release and resuspension of sediments and to the restoration of the lake ecosystem.

Benthic macroinvertebrates associated with four species of macrophytes

Biologia ◽  
2007 ◽  
Vol 62 (5) ◽  
Author(s):  
Irella Bogut ◽  
Jasna Vidaković ◽  
Goran Palijan ◽  
Dubravka Čerba
Keyword(s):  
Benthic Macroinvertebrates ◽  
Aquatic Vegetation ◽  
Taxonomic Composition ◽  
Ceratophyllum Demersum ◽  
Growing Seasons ◽  
Nymphoides Peltata ◽  
State Of Water ◽  
Macrophyte Species ◽  
Nature Park ◽  
Research Period

AbstractBenthic macroinvertebrates associated with four species of macrophytes (Nymphoides peltata, Ceratophyllum demersum, Polygonum amphibium and Carex sp.) were investigated during two growing seasons (2001 and 2002) in the slow-flowing Čonakut Channel in the Kopački rit Nature Park in Croatia. A total of 31 macroinvertebrate taxa were found. C. demersum, a submerged plant with dissected leaves, supported the highest macroinvertebrate abundance, almost seven times more than N. peltata, a floating plant with undissected leaves, which harboured the lowest abundance during the research period. Chironomidae larvae (50–83%) and Oligochaeta (14–46%) were the most abundant groups recorded on all macrophyte species. Water-level fluctuation, because of its influence on the appearance and growth of aquatic vegetation, and the trophic state of water within the macrophyte stands seemed to be the main factors which affected the taxonomic composition and abundance of macroinvertebrates.

scholarly journals Approach to optimizing ecological monitoring of water quality using indicators of constancy of higher water vegetation (using example of upper course of white river in Bashkortostan republic)

2021 ◽  
Vol 54 (2) ◽  
pp. 101-105
Author(s):  
Boris Yu. Chaus
Keyword(s):  
Aquatic Vegetation ◽  
Lemna Minor ◽  
Myriophyllum Spicatum ◽  
Ecological Monitoring ◽  
Ceratophyllum Demersum ◽  
Potamogeton Crispus ◽  
Najas Marina ◽  
Republic Of Bashkortostan ◽  
Higher Aquatic Vegetation ◽  
Potamogeton Perfoliatus

Abstract. The article provides an analysis of the dynamics of the constancy indicators of representatives of higher aquatic vegetation (VBR) in the upper reaches of the Belaya River (Republic of Bashkortostan) from 2005 to 2019. Constancy indicators of 11 species of BBP (Butomus umbellatus L., 1753; Elodea canadensis Michx., 1803; Najas marina L., 1753; Potamogeton natans L., 1753; Potamogeton perfoliatus L., 1753; Potamogeton crispus L., 1753; Stuckenia pectinata L., 1753; Myriophyllum spicatum L., 1753; Lemna minor L., 1753; Spirodela polyrhiza Schleid., 1839 and Ceratophyllum demersum L., 1753) were registered in the areas of 2 state water posts the Shushpa railway station and the Arsky Kamen recreation house. In the course of research, for the first time, lists of permanent, additional and random species of BBP were compiled, correlation-regression models of the relationships between the constancy indicators of representatives of higher aquatic vegetation with the content of chemicals were calculated, the pollutants most strongly affecting the constancy indicators of representatives of BBP were identified, determined in the water of the upper course of the Belaya River.

Transition of a lake to turbid state six years after biomanipulation: mechanisms and pathways

1995 ◽  
Vol 32 (4) ◽  
pp. 197-206 ◽  
Author(s):  
E. van Donk ◽  
R. D. Gulati
Keyword(s):  
Aquatic Vegetation ◽  
Late Summer ◽  
Ceratophyllum Demersum ◽  
Clear Water ◽  
Scardinius Erythrophthalmus ◽  
Water State ◽  
Fulica Atra ◽  
Macrophyte Species ◽  
Turbid State ◽  
Main Factors

Six years after application of biomanipulation in 1987, Lake Zwemlust (The Netherlands) returned during the summer from a clear water state dominated by aquatic vegetation to a turbid state characterized by high algal biomass. Herbivory and growth of epiphytes on macrophytes were the main factors triggering the switch. Selective herbivory by coots (Fulica atra) and rudd (Scardinius erythrophthalmus) caused a change in macrophyte species composition from a dominance of Elodea nuttallii in 1988/1989 to Ceratophyllum demersum in 1990/1991, and finally to Potamogeton berchtholdii in 1992/1993/1994. Observations revealed a general lack of epiphytes associated with Elodea and Ceratophyllum, while Potamogeton showed a progressive coverage with epiphytes, causing Potamogeton to decline markedly during late summer. Phytoplankton blooms, dominated by cyanobacteria, appeared again during three consecutive autumns, 1992, 1993 and 1994, with chlorophyll-α concentrations reaching 60-240 μg 1−1.

Ecological characteristics of plankton and aquatic vegetation in Lake Qiluhu

2014 ◽  
Vol 69 (8) ◽  
pp. 1620-1625 ◽  
Author(s):  
Hu Mingming ◽  
Zhou Huaidong ◽  
Wang Yuchun ◽  
Wang Yingcai ◽  
Wang Zhen ◽  
...  
Keyword(s):  
Aquatic Vegetation ◽  
Potamogeton Pectinatus ◽  
Ceratophyllum Demersum ◽  
Submerged Vegetation ◽  
Total Biomass ◽  
Potamogeton Crispus ◽  
Average Value ◽  
Set Up ◽  
Limnothrix Redekei ◽  
High Level

Investigations of the phytoplankton, zooplankton, zoobenthos and aquatic vegetation in Lake Qiluhu were carried out in February, 2009. Over the whole lake, 13 sampling sites were set up for the analysis of phytoplankton and zooplankton, and 22 profiles for the collection of macrophytes and zoobenthos. In the survey, 7 phyla, 65 algae species were identified. The average abundance of phytoplankton was 7.16 × 108 cells/L, and the dominant specie was Limnothrix redekei. No obvious surface accumulation of algae was detected. The concentration of Chlorophyll a ranged from 85 to 101 μg/L, and the average value was 93 μg/L. Nineteen species of zooplankton were observed, including 4 species of rotifers, 6 species of cladocerans and 9 species of copepods. Copepods were the dominant species, their abundance reaching 68%, whilst Cladocerans took second place with an abundance proportion of 28%. Six species of submerged vegetation were identified: Potamogeton Pectinatus, Myriophyllum, Elodea Canadensis, Ceratophyllum demersum and Potamogeton crispus. Amongst them, the dominant vegetation was P. Pectinatus, the biomass of which was up to 63% of the total biomass. Emerged macrophytes were cluster distributed across the whole lake, mainly consisting of Scirpus tabernaemontani, phragmites communis and cane shoots. Unfortunately, no living zoobenthos were found at the sites. The results indicated that, in Lake Qiluhu, the abundance of phytoplankton was maintained at a high level. The ecological function of submerged vegetation was gradually being lost because of its low standing crop and coverage, and the benthic animal habitat was severely damaged.

scholarly journals Effects of Artificial LED Light on the Growth of Three Submerged Macrophyte Species during the Low-Growth Winter Season: Implications for Macrophyte Restoration in Small Eutrophic Lakes

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1512 ◽  
Author(s):  
Chao Xu ◽  
Hai-Jun Wang ◽  
Qing Yu ◽  
Hong-Zhu Wang ◽  
Xiao-Min Liang ◽  
...  
Keyword(s):  
Nutrient Loading ◽  
Submerged Macrophytes ◽  
Winter Season ◽  
Photon Flux ◽  
Ceratophyllum Demersum ◽  
Artificial Light ◽  
Eutrophic Lakes ◽  
Led Light ◽  
Shoot Number ◽  
Macrophyte Species

Eutrophication of lakes is becoming a global environmental problem, leading to, among other things, rapid reproduction of phytoplankton, increased turbidity, loss of submerged macrophytes, and the recovery of these plants following nutrient loading reduction is often delayed. Artificial light supplement could potentially be a useful method to help speeding up recovery. In this study, three common species of submerged macrophytes, Vallisneria natans, Myriophyllum spicatum and Ceratophyllum demersum, were exposed to three LED light treatments (blue, red and white) and shaded (control) for 100 days (from 10 November 2016 to 18 January 2017) in 12 tanks holding 800 L of water. All the three LED light treatments promoted growth of the three macrophyte species in terms of shoot number, length and dry mass. The three light treatments differed in their effects on the growth of the plants; generally, the red light had the strongest promoting effects, followed by blue and white. The differences in light effects may be caused by the different photosynthetic photon flux density (PPFD) of the lights, as indicated by an observed relationship of PPFD with the growth variables. The three species also responded differently to the light treatments, V. natans and C. demersum showing higher growth than M. spicatum. Our findings demonstrate that artificial light supplement in the low-growth winter season can promote growth and recovery of submerged macrophytes and hence potentially enhance their competitiveness against phytoplankton in the following spring. More studies, however, are needed to elucidate if LED light treatment is a potential restoration method in small lakes, when the growth of submerged macrophytes are delayed following a sufficiently large external nutrient loading reduction for a shift to a clear macrophyte state to have a potential to occur. Our results may also be of relevance when elucidating the role of artificial light from cities on the ecosystem functioning of lakes in urban areas.

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