Impact of future climate scenarios on peatland and constructed wetland water quality: A mesocosm experiment within climate chambers

Importance of water level management for peatland outflow water quality in the face of climate change and drought

“…According to Salimi et al (2021b), who investigated the impact of water level management on the carbon dioxide sink function of peatlands under different climate scenarios, climates with lower temperatures may require less intensive water level management. As a result, the findings of all our studies (this study; Salimi and Scholz, 2021;Salimi et al 2021b) on peatland mesocosms Fig. 3 Trends of a total phosphorus (TP), b pH, c ammonium-nitrogen (NH 4 -N), d dissolved oxygen (DO), e dissolved organic carbon (DOC), f total suspended solids (TSS), g chemical oxygen demand (COD), h 5-day biochemical oxygen demand (BOD 5 ), i temperature, and j water level for peatland mesocosms (unmanaged and managed treatment) under different climate scenarios (current climate (CC) and future representative concentration pathway (RCP) climate scenarios (RCP 2.6, RCP 4.5, and RCP 8.5) over a 3-year experimental period (2017-2020) simulating the real time for the period 2016-2019.…”

“…The complexity of the response of the peatland ecosystem might be attributed to some degree to the fact that the vegetation composition would shift gradually as a result of climate change, and this shift may modify nutrient demands and potential uptake by the vegetation (Turetsky 2003). As a result, while the warmer climate and lower water level would promote peat degradation and nutrient release (Belyea and Malmer 2004;Strack et al 2008;Macrae et al 2013), the altered plant composition could increase nutrient uptake and offset the adverse implications of warmer climate on peatland ecosystems to some extent (Salimi and Scholz 2021). However, other studies have found that the rate of nutrient uptake by plants may be slower than the rate of organic matter mineralization, raising concerns about net nutrient leaching from peatlands in the face of warmer climate (Westman and Laiho 2003).…”

“…Predicting the extent and direction of the response of peatland water quality to climate change and drought is challenging (Moore et al 1998 ; Li et al 2020 ). Since the literature contains contradictory results regarding the impact of water table changes on nutrient release (Tiemeyer et al 2007 ; Urbanová et al 2011 ; Macrae et al 2013 ), understanding the water level management effect on water quality is critical (Salimi and Scholz 2021 ). Moreover, as various climate scenarios might demand different types of management including water level adjustment, the assessment of different management strategies for different climate scenarios is therefore necessary.…”

Knowledge Atlas on the Relationship between Water Management and Constructed Wetlands—A Bibliometric Analysis Based on CiteSpace

“…Sustainability 2022, 14, x FOR PEER REVIEW 6 of 30 maintaining a certain number of publications in 2006, including a study on the efficiency of CW water at removing pollutants from agricultural wastewater over a seven-year period [40], as well as the rates of agricultural and domestic wastewater purification by an integrated constructed wetland simulated by the multiple regression model, principal component analysis, redundancy analysis, and a self-organizing map model. Moreover, the study investigates the recycling of grey water treated by CWs for crop irrigation, and the high temperature to improve the quality of the water purification in CWs [41,42]. Robert Kroeger's research focuses on a pollutant breakdown by plant [43][44][45], Rory Harrington's research focuses on integrated CW research [40,46], and Sarah A White's research focuses on floating-wetland purification [47].…”

Climate change and drinking water from Scottish peatlands: Where increasing DOC is an issue?

“…Some examples come from studies conducted in the UK (Evans et al, 2006), North America (Meyer-Jacob, 2019), Norway (Hongve et al, 2004), Sweden (Erlandsson et al, 2010), Czech Republic (Oulehle & Hruška, 2009) and Germany (Musolff et al, 2017). [DOC] is predicted to further increase with increasing temperatures (Salimi & Scholz, 2021), drought periods (Riston et al, 2017, Lee et al, 2021) and CO2 levels (Hejzlan et al, 2002, Fenner et al, 2021. However, climatic variables have not been the only cause of the recent increase, and a diminishing of anthropogenic sulphate depositions has also substantially contributed to it (Monteith et al, 2007).…”