Environmental history of an urban lake: a palaeolimnological study of Lake Jyväsjärvi, Finland

Altered energy flow pathways in a lake ecosystem following manipulation of fish community structure

“…The lake has an area of 337 ha, a maximum depth of 27 m and a mean depth of 7.2 m, and is thermally stratified in summer. Jyväsjärvi had become heavily polluted by the late 1960s, but the condition of the lake since has been progressively improving (Meriläinen et al 2003;Salonen et al 2005). Paleolimnological studies from chironomid remains indicated mesotrophic conditions in the lake even before the high anthropogenic pollution (Meriläinen et al 2003).…”

“…Jyväsjärvi had become heavily polluted by the late 1960s, but the condition of the lake since has been progressively improving (Meriläinen et al 2003;Salonen et al 2005). Paleolimnological studies from chironomid remains indicated mesotrophic conditions in the lake even before the high anthropogenic pollution (Meriläinen et al 2003). Nevertheless, the lake is still somewhat eutrophic and the concentration of total phosphorus is typically around 35-40 lg l -1 and of total nitrogen 850 lg l -1 (Salonen et al 2005).…”

Atmospheric pollution and human health: the significance of a datable sedimentary archive from a small urban lake in Merseyside, UK

“…A few studies [16,17] have examined urban sites but the majority of work conducted within the urban setting has concentrated on contemporary monitoring of atmospheric pollution using road dusts, surface soils and filtration/capture equipment, and stations recording daily air quality [18]. While this contemporary monitoring yields significant spatial information about diurnal and seasonal changes, plus the relationship of air quality to weather patterns, there is a distinct need to generate information about the temporal patterns of atmospheric pollution.…”

An extended Benthic Quality Index for assessment of lake profundal macroinvertebrates: addition of indicator taxa by multivariate ordination and weighted averaging

“…The BQI is well suited for such assessment because it can be interpreted as measuring the community characteristics, 'ratio of disturbancesensitive taxa to insensitive taxa' and 'taxonomic composition,' included in the normative definitions of ecological status by the WFD (Jyväsjärvi et al 2010). The strong response of BQI to increasing and decreasing human disturbance has been well documented in contemporary (Rask et al 2011, Jyväsjärvi et al 2012) and palaeolimnological (Ilyashuk et al 2003, Meriläinen et al 2003, Hynynen et al 2004, Verbruggen et al 2011) studies. Another advantage of BQI for modern reference-condition-based assessments (Bailey et al 2004, Stoddard et al 2006) is that its sitespecific reference value can be predicted reliably from environmental variables (Jyväsjärvi et al 2010).…”