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.

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>

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.

Aquatic vegetation (Lemnetea, Potametea) of the Ob river floodplain (within the limits of Aleksandrovskiy district of Tomsk region)

2008 ◽  
pp. 68-75 ◽  
Author(s):  
G. S. Taran
Keyword(s):  
Western Siberia ◽  
Aquatic Vegetation ◽  
Ceratophyllum Demersum ◽  
River Floodplain ◽  
Ob River ◽  
Tomsk Region ◽  
Potamogeton Natans

In the Ob river floodplain between the mouths of its tributaries Vakh and Tym (within the limits of Aleksandrovskiy district of Tomsk region), phytocoenoses belonging to 9 associations and 2 communities of Braun-Blanquet classification vegetation classes are listed. Class Lemnetea is represented by associations Ricciocarpetum natantis (Segal 1963) Tx. 1974, Lemnetum trisulcae Soó 1927, Stratiotetum aloidis Miljan 1933; class Potametea is done by asso­ciations Potametum perfoliati Koch 1926, Myriophylletum sibirici Taran 1998, Myriophylletum verticillati Soó 1927, Potametum graminei Koch 1926, Potametum pectinati Carstensen 1955, Nymphoidetum peltatae (All. 1922) Bellot 1951, as well as Sagittaria natans and Potamogeton natans—Ceratophyllum demersum communities. The syntaxa distribution in Western Siberia and adjoining territories is characterized.

Distribution pattern of epiphytic microcrustaceans in relation to different macrophyte microhabitats in a shallow wetland (Upo wetlands, South Korea)

2015 ◽  
Vol 44 (2) ◽  
Author(s):  
Jong-Yun Choi ◽  
Seong-Ki Kim ◽  
Kwang-Seuk Jeong ◽  
Gea-Jae Joo
Keyword(s):  
Organic Matter ◽  
Particulate Organic Matter ◽  
Submerged Macrophytes ◽  
Submerged Macrophyte ◽  
Ceratophyllum Demersum ◽  
Suitable Habitat ◽  
Seasonal Growth ◽  
Spirodela Polyrhiza ◽  
Macrophyte Species ◽  
Salvinia Natans

AbstractMacrophytes determine the physical complexity of aquatic environments and provide a suitable habitat for colonization by microcrustaceans. We evaluated the effects of a seasonal growth pattern and structure of macrophyte species on epiphytic microcrustaceans collected from macrophyte surfaces (stems and leaves) in shallow wetlands from May 2011 to October 2012. In 2011, epiphytic microcrustaceans that preferred free-floating macrophytes (Spirodela polyrhiza and Salvinia natans) and submerged macrophytes (Potamogeton crispus and Ceratophyllum demersum) were affected by the seasonal growth of these species. Epiphytic microcrustaceans were abundant on the surface of Spirodela polyrhiza in June and August and on Salvinia natans in September and October. In 2012, epiphytic microcrustaceans preferred submerged macrophyte species over the free-floating ones. The results of stable isotope analysis showed that epiphytic microcrustaceans depend on epiphytic particulate organic matter (EPOM) from each macrophyte species rather than on suspended particulate organic matter. Small species (Coronatella rectangula, Pleuroxus laevis, and Chydorus sphaericus) used EPOM (dominated by epiphytic algae) on free-floating and submerged macrophyte species; however, relatively larger species (Ilyocryptus spinifer and Macrothrix rosea) used EPOM only from submerged macrophytes. Based on these findings, we conclude that the distribution of epiphytic microcrustaceans is determined by seasonal characteristics, morphology of macrophyte species, and abundance of food resources.

scholarly journals Phytoplankton response to fish-induced environmental changes in a temperate shallow pond-type lake

2017 ◽  
Vol 25 (4) ◽  
pp. 211-262 ◽  
Author(s):  
Agnieszka Napiórkowska-Krzebietke
Keyword(s):  
Phytoplankton Biomass ◽  
Environmental Changes ◽  
Silver Carp ◽  
Ecological Status ◽  
Ctenopharyngodon Idella ◽  
Predatory Fish ◽  
Turbid Water ◽  
Clear Water ◽  
Water State ◽  
Pond Type

AbstractSince 1967, the temperate, shallow, pond-type Lake Warniak has been subjected to different biomanipulation methods including the introduction of common carp,Cyprinus carpioL., grass carp,Ctenopharyngodon idella(Val.), silver carp,Hypophthalmichthys molitrix(Val.), and bighead carp,Hypophthalmichthys nobilis(Richardson) and then their removal in an effort to control macrophytes and phytoplankton. Recently, pilot stocking with predatory fish, particularly pike,Esox luciusL., has also been conducted. Hence, an examination of the long-term response patterns of phytoplankton to multiple fish-induced stressors was undertaken. In recent years,Charadomination (2000-2004) has helped to stabilize a clear-water state, high/good ecological status, and meso-eutrophic conditions. After the disappearance of Charales in 2004, the rapid, unstable changes in phytoplankton biomass, structure, and biodiversity suggested a shift toward a turbid-water state. As a result, the phytoplankton assemblages changed from those dominated by cryptophytes Y+X2+X1+LO(2000-2004) through those dominated by cyanobacteria K (2005-2008), dinoflagellates LO+Y (2009-2011), and cryptophytes Y+LO+F+X2 (2012), to those dominated by diatoms D+K+P+A (2013-2014) with representative taxa that occur in nutrient-rich and/or nutrient-poor water bodies. The 1967-2014 changes indicated that four periods, two with clear-water state and two with turbid-water state, alternately, one after the other, resulted from different fish pressure. Higher autochthonous fish biomass was usually accompanied by lower phytoplankton biomass. In contrast, the introduction of Cyprinidae fish had a stimulating effect on summer phytoplankton dominated by cyanobateria. Among the nutrients, only phosphorus played an important role.

scholarly journals Influence of ultraviolet radiation on aquatic plants in conditions of low lighting

2021 ◽  
Vol 32 (1) ◽  
pp. 17-21
Author(s):  
O. O. Shugurov ◽  
G. M. Oliynik
Keyword(s):  
Ultraviolet Radiation ◽  
Low Power ◽  
Leaf Area ◽  
Uv Irradiation ◽  
Aquatic Plants ◽  
Aquatic Vegetation ◽  
Photosynthetic Apparatus ◽  
Ceratophyllum Demersum ◽  
Continuous Exposure ◽  
White Leds

The effect of ultraviolet radiation (UV-r) on aquatic vegetation in conditions of general insufficient illumination was studied in laboratory conditions. In the studies such species of aquatic vegetation were used – submerged hornwort (Ceratophyllum demersum), thai fern (Microsorium pteropus), and globular cladophore (Aegagropila linnaei). The studies were carried out simultaneously in 3 aquariums, 3 liters each, with five iterations. For each of the experiments, the containers with water were covered with black paper on all sides, and 3 plants of each species were placed. Low-power LEDs were installed above the water surface of each aquarium. 2 white LEDs of the FYL-3014SRC brand (each with a power of 0.06 W at a luminous intensity of 600 mcd) were used for control experiments. In other versions of experiments with irradiation, we used – 2 white and 2 UV-diodes (similar power), and 2 white diodes together with 6 UV-diodes. Every week during the experiment, the morphometric parameters (weight, leaf area, length) and color of vegetation were measured during a 30-day continuous exposure from the sources described above. At the end of the experiment, it was found that with a general low power of white illumination, the presence of additional UV-r can have a multidirectional effect on vegetation that lives at different levels of the water system. Thus, UV irradiation negatively affects rootless plants of the upper layers of aquatic systems (Ceratophyllum demersum), probably due to known disturbances in the their photosynthetic apparatus. UV-r led to a decrease in the mass and leaf area of such plants (by 80–90 %), a change in their color, disruption of their vital activity, the development of tissue decay processes and even death by the end of the experiment. On root plants (Microsorium pteropus) with arrow-shaped leaves pointing upwards, additional UV-r can support the light balance and to some extent compensate (by 10–15 %) the overall decline in the level of their development (by 60–75 %). Bottom vegetation (Aegagropila sauterii), living at a depth of up to 5 m, is able to fully compensate for the lack of natural illumination by UV irradiation. UV-r penetrates the water column and after re-radiation on elements of aqueous solution penentrates to a considerable depth in the form of longer waves, and then used of plants with a general increase in the measured parameters by 5–20 %. This article concludes that the final effect on aquatic plants is formed by the depth of their habitat and the total intensity of light falling on the surface of the aquatic system. At the same time, under conditions of a lack of light, UV-r can act negatively on plants that are located close to the surface of the water, and at the same time positively as an additional source of energy – on benthic plants.

scholarly journals Macrophyte Diversity as a Response to Extreme Conditions in the Post-Mining Lakes of the Muskau Arch (West Poland)

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2909
Author(s):  
Małgorzata Oszkinis-Golon ◽  
Marcin Frankowski ◽  
Andrzej Pukacz
Keyword(s):  
Negative Impact ◽  
Extreme Environments ◽  
Species Number ◽  
Habitat Conditions ◽  
Anthropogenic Pressures ◽  
Chl A ◽  
Unique Character ◽  
Physico Chemical ◽  
Macrophyte Species ◽  
Main Factors

The pit lakes localized in the eastern part of the Muskau Arch (Western Poland) developed as a result of lignite mining at the turn of the 20th century. The formation of the lakes varied over time and was determined by many hydrogeochemical and biological factors, which resulted in very diverse ecosystems. Thirty of these lakes were studied in the vegetation seasons of 2016 and 2017. The aim of the study was to identify the main factors influencing the diversity of macrophyte vegetation growing under very extreme and diversified habitat conditions. Therefore, in each lake the numbers of macrophyte species and communities were determined, and the water was characterized by 26 physico-chemical parameters and Chl a. Additionally, the genesis, age, area and maximum depth of each lake was determined. The results showed high diversity of habitat conditions. Based on the physical and chemical water properties, four different clusters of lakes were distinguished. The multiple statistical comparisons showed that the main factors responsible for lake differentiation were pH, water mineralization and to a lesser extent, nutrient concentration and water transparency. The physico-chemical differentiation was reflected in the significant differences in the number of species, number of communities, maximum vegetation extent and amount of chlorophyll-a per lake. The correlational analyses confirmed significant relationships between habitat conditions and macrophyte flora diversity in the lakes. Some macrophyte species were found in very extreme environments not previously reported in the literature. Our results showed that in addition to natural processes affecting species diversity in the lakes, the negative impact of anthropogenic pressures (neutralization and fertilization of the water), which leads to the degradation of their unique character, is also an important factor.

Aquatic macrophytes as a habitat for free-living nematodes

Nematology ◽  
2006 ◽  
Vol 8 (5) ◽  
pp. 691-701 ◽  
Author(s):  
Jasna Vidaković ◽  
Irella Bogut
Keyword(s):  
Aquatic Macrophyte ◽  
Dry Weight ◽  
Nematode Species ◽  
Trophic Group ◽  
Ceratophyllum Demersum ◽  
The North ◽  
Macrophyte Species ◽  
North Bank ◽  
Nature Park ◽  
Relative Abundances

Abstract The composition, trophic structure and diversity of nematode assemblages associated with three aquatic macrophyte species (Polygonum amphibium, Carex sp., Ceratophyllum demersum) were surveyed. Sampled stands were present at the three sites of the north bank in the Čonakut Channel (Nature Park Kopački rit, Croatia). They were all submerged during the period of investigation, which included two vegetation seasons. Nematode abundances (expressed as a number of individuals per 100 g of macrophyte dry weight) differ between the two vegetation seasons and between the sites, but not between the macrophyte species. In total, 19 nematode species were recorded. Chromadorina viridis, C. bioculata, Brevitobrilus stefanskii, Eutobrilus notus, Prodorylaimus longicaudatus and Ethmolaimus sp. were associated with all macrophyte species. Genera Eutobrilus, Brevitobrilus and Chromadorina were present at the highest relative abundances. Species diversity (H and Simpson's D) and evenness (Pielou's J), calculated on the nematode species level, display little or no change in relation to different macrophyte species. Ceratophyllum demersum associated nematode fauna had distinct dominance of one species (Eutobrilus notus) and consequently lower evenness, which was not statistically significant. Chewers (CH) represented the dominant trophic group of total nematode abundance for all three macrophyte species followed by epistrate feeders (EF). Detritus feeders (DF) and suction feeders (SF) were represented by low relative abundances. This paper is a contribution to ecology of aquatic nematodes associated with macrophyte species in mesoeutrophic to eutrophic slow flowing channel.

Intrinsic processes causing periodic changes in stability in a shallow biomanipulated lake

2011 ◽  
Vol 62 (2) ◽  
pp. 197 ◽  
Author(s):  
István Tátrai ◽  
Ágnes I. György ◽  
Kálmán Mátyás ◽  
János Korponai ◽  
Piroska Pomogyi ◽  
...  
Keyword(s):  
Food Web ◽  
Shallow Lakes ◽  
Nutrient Loading ◽  
Fish Biomass ◽  
Alternative States ◽  
Fish Manipulation ◽  
Water State ◽  
Benthic Fishes ◽  
Turbid State

Shallow lakes experience alternative states in their biotic organisation over time. In this study, we analysed a long-term dataset on the recovery from eutrophication of a shallow hypertrophic lake (Lake Major, Hungary) following fish manipulation. Disturbances in the food web triggered a shift, markedly affecting both abiotic and biotic variables. Clear and turbid states of Lake Major over the period 1999–2009 were defined by concentrations of chlorophyll-a. Lake Major in a clear-water state had higher transparency and submerged macrophyte cover, lower turbidity and fish biomass, and total phosphorus was relatively low compared to that shown during the turbid-water state. It follows from our study that a regime shift from a turbid state to a clear state can be expected in response to fish manipulation. Reduction in fish biomass increases light conditions, decreases internal nutrient loading and promotes macrophyte dispersion. Food-web effects appear to be considerable in these shallow lakes containing benthic fishes. The roles of phosphorus and submerged macrophytes are essential in maintenance of alternative states of vegetation in shallow lakes of various climatic zones.

SYSTEMATICS AND THE SYNECOLOGY OF AQUATIC INSECTS: PHENOLOGY AND TEMPORAL STRUCTURE OF TEMPERATE LAKE ASSEMBLAGES

1993 ◽  
Vol 125 (S165) ◽  
pp. 243-256 ◽  
Author(s):  
P.P. Harper ◽  
Louise Cloutier
Keyword(s):  
Aquatic Vegetation ◽  
Temporal Structure ◽  
Seasonal Succession ◽  
Late Summer ◽  
Open Water ◽  
Temporal Analysis ◽  
Shore Station ◽  
Near Shore ◽  
The One ◽  
Lake Systems

AbstractFour emergence series were collected from a small mesotrophic–dystrophic lake in the southern Laurentians of Québec: near shore (station A, 0.3 m, shrubs and heaths), in the littoral zone (B, 0.6 m, and C, 1 m, aquatic vegetation), and in open water (D, 6 m, no vegetation). A gradient of species richness (121–34), of numbers (4622–1120/m2), of diversity (5.62–2.42 bits), and of equitability (0.81–0.48) extended from the shore to the open water. Also recognized was a seasonal succession of early synchronized species, many of which completed a second generation by late summer, and of more dispersed summer species. This pattern was best exemplified in the shore station, whereas in deeper sites, the assemblages were increasingly less structured and dominated by fewer species. Chaoborus punctipennis, a benthic insect feeding in the water column at night, tended to predominate in the outer stations and to impose its particular seasonal dynamics on the assemblage there. Chronological clustering revealed distinctive early- and late-season assemblages in all sites. A succession of distinct and temporally structured mid-season assemblages was evident at the shore station, but this pattern was obscured in other stations because of the recurrence and dominance of the same species throughout. Though these particular patterns may be restricted to the one lake studied, this approach based on a taxonomical and temporal analysis offers promise for generalizations once it has been applied to a variety of lake systems.

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