Climate driven changes in the submerged macrophyte and phytoplankton community in a hard water lake

Ejankowski, Wojciech; Lenard, Tomasz

doi:10.1016/j.limno.2015.03.003

Cited by 23 publications

(13 citation statements)

References 44 publications

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“…However, charophytes generally do not have higher light requirements than vascular plants. There are two alternative explanations for the decreased charophyte abundance: it has been suggested that the altered color of the water diminished the establishment of charophytes and provided an opportunity to competitors ( Ejankowski and Lenard, 2015 ). Middelboe and Markager (1997) suggested that the negative effect on charophyte growth can also be caused by the fact that colored substances reduce the pH of the water.…”

Section: The Effects Of Doc On Macrophytesmentioning

confidence: 99%

The Future of Freshwater Macrophytes in a Changing World: Dissolved Organic Carbon Quantity and Quality and Its Interactions With Macrophytes

2018

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Freshwater ecosystems are confronted with the effects of climate change. One of the major changes is an increased concentration of aquatic carbon. Macrophytes are important in the aquatic carbon cycle and play as primary producers a crucial role in carbon storage in aquatic systems. However, macrophytes are affected by increasing carbon concentrations. The focus of this review lies on dissolved organic carbon (DOC), one of the most abundant forms of carbon in aquatic ecosystems which has many effects on macrophytes. DOC concentrations are rising; the exact cause of this increase is not known, although it is hypothesized that climate change is one of the drivers. The quality of DOC is also changing; for example, in urban areas DOC composition is different from the composition in natural watersheds, resulting in DOC that is more resistant to photo-degradation. Plants can benefit from DOC as it attenuates UV-B radiation, it binds potentially harmful heavy metals and provides CO2 as it breaks down. Yet plant growth can also be impaired under high DOC concentrations, especially by humic substances (HS). HS turn the water brown and attenuate light, which limits macrophyte photosynthesis at greater depths. This leads to lower macrophyte abundance and lower species diversity. HS form a wide class of chemicals with many different functional groups and they therefore have the ability to interfere with many biochemical processes that occur in freshwater organisms. Few studies have looked into the direct effects of HS on macrophytes, but there is evidence that HS can interfere with photosynthesis by entering macrophyte cells and causing damage. DOC can also affect reactivity of heavy metals, water and sediment chemistry. This indirectly affects macrophytes too, so they are exposed to multiple stressors that may have contradictive effects. Finally, macrophytes can affect DOC quality and quantity as they produce DOC themselves and provide a substrate to heterotrophic bacteria that degrade DOC. Because macrophytes take a key position in the aquatic ecosystem, it is essential to understand to what extent DOC quantity and quality in surface water are changing and how this will affect macrophyte growth and species diversity in the future.

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Section: The Effects Of Doc On Macrophytesmentioning

confidence: 99%

The Future of Freshwater Macrophytes in a Changing World: Dissolved Organic Carbon Quantity and Quality and Its Interactions With Macrophytes

2018

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“…The acidification of water due to increasing CO 2 affects the growth and distribution of aquatic macrophytes (Short and Neckles, 1999). Seaweeds will benefit from the increase in inorganic carbon concentration as more CO 2 is available for their accessibility while growth of macroalgae will be reduced (Beardall et al, 1998;Kroeker et al, 2010;Ejankowski and Lenard, 2015). In nutshell, high CO 2 concentration promotes eutrophication which supports algal growth ultimately decreasing the light reaching the other plants hence decreasing their productivity.…”

Section: Co 2 Concentrationmentioning

confidence: 99%

Status of Aquatic Macrophytes in Changing Climate: A Perspective

Dhir¹

2015

J. of Environmental Science and Technology

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Increased emissions of greenhouse gases such as carbon dioxide (CO 2) and associated increase in Earth's surface and water temperature has been seen as the major climatic change of the last decade. Aquatic macrophytes form a major part of highly productive aquatic ecosystems. Increased eutrophication, acidification and salination of water adversely affect the growth and development of aquatic macrophytes via phenological and metabolic alterations. Predicted increases in temperature and increase in rainfall suggest the enhancement in the growth of emergent aquatic macrophytes. The changes in the growth profile of aquatic macrophytes, distribution and abundance are supposed to ultimately cause a strong ecological impact on the structure and function of aquatic ecosystems globally.

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“…Short ice cover duration on lakes can lead to intensive and long-lasting water mixing (Lenard and Wojciechowska, 2013), increases in nutrient concentrations, higher biomass of phytoplankton and lower biomass of zooplankton, and much higher water turbidity (Weyhenmeyer et al, 2008;Laugaste et al, 2010). Hence, mild winters can negatively affect the underwater light climate, which modifies conditions for the development of submerged aquatic vegetation in lakes (Ejankowski and Lenard, 2015). Nevertheless, in Charadominated lakes, the extensive overwintering charophytes can hamper the development of phytoplankton species by modifying their responses to nutrient concentrations, thus weakening the unfavourable effects of a mild winter on water quality (Pełechata et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Different responses of primary producers to mild winter in macrophyte- and phytoplankton-dominated lakes

Lenard¹,

Ejankowski²,

Poniewozik³

2019

Knowl. Manag. Aquat. Ecosyst.

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Early ice-out on lakes or the absence of ice cover can lead to intense water mixing, high turbidity, and changes in nutrient balance and light conditions in the water, which in turn affect the phytoplankton community and submerged aquatic vegetation (SAV) in the aquatic environment. This study aimed to evaluate whether the effects of a mild winter on these primary producers are differentiated in two types of eutrophic lakes: phytoplankton-dominated (PDL), with a low proportion of SAV, and macrophyte-dominated (MDL), with extensive benthic vegetation. The physical and chemical parameters of the water, concentration of chlorophyll a, and the biomass of phytoplankton and SAV were investigated in four small eutrophic lakes (Eastern Poland) during the growing season after cold winters (CW) and mild winters (MW). In both types of lakes, the concentrations of soluble and total nitrogen were higher and the values of soluble and total phosphorus were lower after the MW than after the CW. The concentration of chlorophyll a and the phytoplankton biomass were always higher in the PDL than in the MDL, but the increase in both parameters in the vegetation season after the MW was statistically important only in the PDL. A poor underwater light climate was stressful for the SAV in the PDL, but not in the MDL. The MW had negative effects on phytoplankton diversity and the loss of light-demanding macrophytes. However, the biomass of primary producers in the MDL seems to be more resistant to climate warming, in comparison to the PDL.

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Climate driven changes in the submerged macrophyte and phytoplankton community in a hard water lake

Cited by 23 publications

References 44 publications

The Future of Freshwater Macrophytes in a Changing World: Dissolved Organic Carbon Quantity and Quality and Its Interactions With Macrophytes

The Future of Freshwater Macrophytes in a Changing World: Dissolved Organic Carbon Quantity and Quality and Its Interactions With Macrophytes

Status of Aquatic Macrophytes in Changing Climate: A Perspective

Different responses of primary producers to mild winter in macrophyte- and phytoplankton-dominated lakes

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