Assessment of water quality in ponds across the rural, peri-urban, and urban gradient

Wanek, Alexis Steinman; Hargiss, Christina L. M.; Norland, Jack E.; Ellingson, Nicole

doi:10.1007/s10661-021-09471-7

Cited by 4 publications

(6 citation statements)

References 35 publications

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“…The results of a survey of urban water quality in Shanghai, China showed that the quality of surface water in urban centers and suburban areas with strong environmental supervision improved significantly, while the quality of surface water in rural areas in the outer suburbs with weak environmental supervision deteriorated (Wang et al, 2008;Li et al, 2018). Similarly, the findings of Wanek et al (2021) confirmed that urbanization resulted in significantly better water quality in urban ponds in the United States than in rural ponds. However, areas that are more deficient in urban environmental management during the process of urbanization will show results contrary to the above conclusions.…”

Section: Discussionmentioning

confidence: 89%

Asynchrony between urban expansion and water environmental protection reshapes the spatial patterns of nitrogen and phosphorus concentrations and N:P stoichiometry in inland small water bodies in Changsha, China

Zhou

Liu

Lei

et al. 2022

Front. Environ. Sci.

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The asynchrony of urban expansion and urban water environmental protection is a common problem in the process of urbanization. Although urban expansion results in population agglomeration and dramatic changes of land use, it also brings municipal water infrastructures to enhance the water quality of urban water bodies. In order to understand the relationship between water quality and urban expansion and water environmental management, total nitrogen (TN) and total phosphorus (TP) concentrations were measured, which were taken from 68 small urban water bodies in three distance bands (<5 km, 5–10 km and >10 km away from the city center of Changsha City, China) and four main water management types of protection, recovery, degradation and fisheries. The results showed that: 1) with increase in distance away from the city center, TN and TP concentrations in small water bodies and the percentage of polluted samples (IV ∼ inferior V) showed an increasing trend. 2) The degree of protection of small urban water bodies in the study area has not been synchronistic with urban expansion. The protected water bodies (long-term protected and recovering) are mainly distributed in the <5 km distance band, and anthropogenic disturbances (degraded water bodies and small water bodies used for fish farming) were mainly distributed in the 5–10 km and >10 km distance bands. Also, degraded and fish-managed water bodies had higher TN and TP contents than protected and recovering water bodies, but their TN:TP ratios were significantly lower. 3) Overall, urban expansion and water body management contributed 55.8% of the variance of TN and TP concentrations and TN:TP ratios in the study area. Water body management alone contributed 22.2%, which was higher than the contribution of urban expansion (7.6%). This shows that the insufficient application of water environmental protection measures has significantly changed the spatial distribution patterns of N and P concentrations and TN:TP ratios in urban small water bodies as the Changsha urban area has expanded. In the process of urban expansion, the simultaneous development of urban water ecological management is essential to ensure the health protection of the urban water environment.

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Section: Discussionmentioning

confidence: 89%

Asynchrony between urban expansion and water environmental protection reshapes the spatial patterns of nitrogen and phosphorus concentrations and N:P stoichiometry in inland small water bodies in Changsha, China

Zhou

Liu

Lei

et al. 2022

Front. Environ. Sci.

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“…These observations illustrate the multi-functionality of peri-urban areas with a mixture of different users (Friedmann, 2016; Zoomers et al, 2017) at the local scale. Peri-urban ponds combine contaminants typical of rural and urban environments, that is, a runoff of excess nitrogen (and phosphorus) and an influx of heavy metals and salt from road applications (Wanek et al, 2021). To this list, we may add pesticides and pharmaceuticals.…”

Section: Discussionmentioning

confidence: 99%

“…They are typical zones of continuous transformation (Zoomers et al, 2017) or “restless landscape” (Friedmann, 2016). However, ponds and wetlands in peri-urban environments are understudied (Wanek et al, 2021). Although urban ponds are less diverse than rural ponds, they may host threatened species, thus advocating for good management practices (Oertli and Parris, 2019).…”

Section: Introductionmentioning

confidence: 99%

Do macroinvertebrate abundance and community structure depend on the quality of ponds located in peri-urban areas?

Hulot,

Hanot,

Nélieu

et al. 2023

Preprint

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Contamination is one of the major threats to freshwater biodiversity. Compared to other aquatic ecosystems, peri-urban ponds are unique because they are embedded in human-dominated areas. However, it is poorly understood how different land uses such as urban or agricultural contribute multiple pollutants to ponds and thus affect pond biodiversity. In this work, 12 ponds located in a peri-urban area (Ile-de-France region, France) were monitored for 2 consecutive years in spring and fall. We surveyed macroinvertebrates and measured the physicochemical parameters and contaminants of different classes (trace elements, pharmaceuticals, pesticides and polycyclic aromatic hydrocarbons) in both water and sediment. The objective was twofold: to explore local and regional macroinvertebrate spatiotemporal diversity and to understand the effects of contaminants on abundance and community structure. We observed 247 macroinvertebrate morphotaxa, none of which were rare or sensitive to pollutants. Local alpha diversity (within ponds) showed small differences between ponds and higher variability between years and seasons for species richness and Shannon diversity. We did not observe a relationship between land use around the pond (agricultural, urban, or semi-natural) and its alpha diversity. Regional beta diversity (between ponds) showed that differences in species composition reflected species replacement more than differences in species richness; these were primarily due to the high abundance of pollutant-tolerant species in some of the ponds. The effects of environmental parameters on community structure were studied using partial redundancy analysis based on the presence-absence of morphotaxa, showing that community assemblages are shaped by sediment levels of pharmaceuticals and trace metals, as well as chemical oxygen demand, conductivity and total nitrogen concentration in water. In conclusion, ponds in peri-urban areas are exposed to various human activities, with our results suggesting that this exposure leads to chronic and diverse contaminations that affect species communities.

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“…The upstream and downstream ponds are connected by storm water runoff, dry ditches and grassed canals. These ponds are temporary "sources" of non-point source pollutions as they receive surface runoff from woodlands, farmland or villages [16] [18] [20]. When it rains, water flows out of the upstream ponds and into the upstream ponds, which become an output "source" of nitrogen and phosphorus pollutants to the downstream ponds [25].…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the importance of ponds has been ignored in the ecosystems. In recent years, the ecological function of ponds for ecosystems and climate change has gain more and more attention [15] [16] [17] [18] [19]. Farming ponds serve as ecological functions of hydrological regulation, pollution mitigation, biodiversity conservation and socioeconomic benefits.…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Patterns of Nitrogen and Phosphorus Stoichiometry in Cascade Ponds in an Agricultural Small Watershed and Their Influencing Factors

Zhou¹

2022

JWARP

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Ecological stoichiometry of nitrogen and phosphorus is an important indicator to characterize the nitrogen and phosphorus trophic status in aquatic ecosystems. The study of the spatio-temporal patterns of nitrogen and phosphorus stoichiometry is beneficial to the nitrogen and phosphorus pollution management in pond ecosystems. In this study, 18 groups (36 in total) of typical cascade ponds were selected as long-term observations to investigate the spatial distribution patterns of nitrogen and phosphorus component ratios (ratio of total nitrogen to phosphorus: TN:TP, ratio of dissolved nitrogen to phosphorus: TDN:TDP, ratio of particulate nitrogen to phosphorus: PN:PP) in water bodies in the tropical agricultural watershed of Jinjing. The results showed that the average values of TN:TP and TDN:TDP in the upstream ponds were 26.4 and 53.4, respectively, and were more than those in the downstream (22.95 and 48.1, respectively). In contrast, the PN:PP (13.78) in the upstream was significantly lower than that of the downstream (30.39). Furthermore, the factors of rainfall, agricultural land use and fish farming influenced the spatio-temporal variability of the N:P ratios. The ratios of TN:TP and TDN:TDP were higher in the wet season and lower in the dry season. Agricultural land use and fish farming reduced the ratios of the above three nitrogen and phosphorus components in cascade ponds in the study area. Our results show that strengthening agricultural land pollution control and aquaculture management could help to improve water quality of pond ecosystems in the study area.

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Assessment of water quality in ponds across the rural, peri-urban, and urban gradient

Cited by 4 publications

References 35 publications

Asynchrony between urban expansion and water environmental protection reshapes the spatial patterns of nitrogen and phosphorus concentrations and N:P stoichiometry in inland small water bodies in Changsha, China

Asynchrony between urban expansion and water environmental protection reshapes the spatial patterns of nitrogen and phosphorus concentrations and N:P stoichiometry in inland small water bodies in Changsha, China

Do macroinvertebrate abundance and community structure depend on the quality of ponds located in peri-urban areas?

Spatio-Temporal Patterns of Nitrogen and Phosphorus Stoichiometry in Cascade Ponds in an Agricultural Small Watershed and Their Influencing Factors

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