Reconstruction of Anthropogenic Impact Intensity Changes during Last 300 Years in Lake Engure Using Analysis of Sedimentary Records

Kļaviņš, Māris; Kokorìte, Ilga; Jankevica, Maruta; Rodinovs, Valērijs; Dreijalte, Liga

doi:10.2478/v10145-011-0029-8

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Differences in both of the inter-connected lakes are noticeable also by phytoplankton communities. In Balvu Lake blue-green algae (Cyanophyceae) phytoplankton dominates (89 %) and one of key factors could be availability of nutrients which support biological processes in freshwaters [46], [47]. Moreover, reduced N inputs in Balvu Lake in comparison to P lead to development of nitrogen-fixing cyanobacteria (Aphanizomenon flos-aquae) forming most part of phytoplankton community.…”

Section: Resultsmentioning

confidence: 99%

Quality of Lake Ecosystems and its Role in the Spread of Invasive Species

Purmalis

Grīnberga²,

Kļaviņš

et al. 2021

Environmental and Climate Technologies

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Lake ecosystems are important elements of hydrological regime, the quality of these ecosystems is affected by anthropogenic actions, and therefore, a variety of organisms, living in these habitats depend on the applied management solutions. Due to human activities freshwater ecosystems suffer from loss of biodiversity and increased eutrophication. Therefore, important aspects related to lake management include knowledge about the water quality, ecosystem response to climate change as well as increased risks of appearance and spreading of invasive species. Water quality, content of oxygen, nutrients, phytoplankton and distribution of macrophytes, including invasive species were analysed in Balvu and Pērkonu lakes. Presence of invasive species Canadian waterweed (Elodea canadensis) was detected, however, common reed (Phragmites australis) can be considered as expansive species. The analysis of current situation and existing management measures indicates persistent spreading of those species. Significant changes of lake water quality and climate may increase possible spreading of other, more aggressive, invasive species, for example – Nuttall’s waterweed (Elodea nuttallii).

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Section: Resultsmentioning

confidence: 99%

Quality of Lake Ecosystems and its Role in the Spread of Invasive Species

Purmalis

Grīnberga²,

Kļaviņš

et al. 2021

Environmental and Climate Technologies

View full text Add to dashboard Cite

show abstract

“…Analysis of lake sediment composition is widely used for paleolimnological, paleoclimatic (Sümegi et al, 2008;Heikkila and Seppa, 2010;Grimm et al, 2011) and environmental pollution studies (Klavins et al, 2011;Tylmann et al, 2011). Multiproxy analysis of sediment composition is of great importance in understanding the transformation processes of organic matter during sedimentary phases and is also helpful in reconstructions of palaeoenvironment conditions and palaeoclimatic changes.…”

Section: Introductionmentioning

confidence: 99%