Influence of land use on metal concentrations in playa sediments and amphibians in the Southern High Plains

Venne, Louise S.; Cobb, George P.; Coimbatore, Gopal; Smith, Loren M.; McMurry, Scott T.

doi:10.1016/j.envpol.2006.01.003

Cited by 19 publications

(11 citation statements)

References 29 publications

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“…The geoaccumulation index (I geo ) suggests strong Al pollution along with moderate to strong Ni and Pb pollution, whereas the enrichment factor (EF) points on the anthropogenic impacts on the sedimentary environment signifying Dy, Pb, Ni and Cu enrichment in the sediments of the studied areas. Moreover, significant concentrations of Cu, Ni, Cd and Pb in PER index identified four sites (5,14,16,20) as high ecologically-risk areas. Finally, PLI values demonstrate significant pollution at sites 1, 5-10, 12-16 and 18-23 which is further supported by dendrogram.…”

Section: Discussionmentioning

confidence: 98%

“…The Jazmurian area is surrounded by many mines, such as arsenic, gold, chromium, copper, iron, manganese, antimony and titanium. Hence, sulphuric acid resulting from acid mine drainage contributed to emission of metal ions through the region, causing water and sediment contamination and accumulation over time 15 , which concentrated and dried on the surface of the playas 16,17 . Sedimentation reduces the playa volume and finally leads to completely drying out of the playas.…”

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confidence: 99%

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Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran

Shirani

Afzali

Jahan

et al. 2020

Sci Rep

109

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Jazmurian playa was an ephemeral lake with a large catchment in southeast iran, which dried up over the last 10 years as a result of prolonged drought. As the lake was recipient of incoming industrial water with trace metals deposited to the sediment, the dust is the cause of environmental concern of the region and requires evaluation and better management. The aim of this study was to evaluate the environmental and ecological pollution of Jazmurian playa. Hence, 24 collected surface sedimentary samples were analyzed with ICP-OES. The environmental pollution indices including degree of contamination (cd), geoaccumulation index (igeo), enrichment factor (ef), pollution load index (PLI) and potential ecological risk (PER) were determined. The study revealed moderately to strongly pollution levels of pb, ni and Al, while Dy, pb, Y, Yb, Sm, te, U, cu, Mn, Sc represented moderate pollution. The EF values indicated four sites were highly enriched with Dy, Pb and Ni. The PER results showed high risk for four sites and considerable risk for others. Cluster analysis illustrated interconnection between the contaminants and the sites with major pollution at six sites. Obviously, climate change has considerable complex environmental impacts through transformation of local water and sediment pollution problem.

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Section: Discussionmentioning

confidence: 98%

mentioning

confidence: 99%

Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran

Shirani

Afzali

Jahan

et al. 2020

Sci Rep

109

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“…Furthermore, the general categorisation of playas into cropland or grassland has been used in numerous other studies (e.g. Gray & Smith, 2005; Hernandez et al ., 2006; Venne et al ., 2006; Tsai et al ., 2007).…”

Section: Methodsmentioning

confidence: 99%

Community assemblage patterns of odonates inhabiting a wetland complex influenced by anthropogenic disturbance

Reece

McIntyre

2009

Insect Conserv Diversity

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Abstract. Many wetland complexes around the world are highly influenced by human activity (chiefly land conversion for agriculture). Measuring the impact of such activity hinges not only upon using appropriate wetland indicator taxa but also upon metrics that are sensitive enough to capture subtle effects. Over a 5‐year period, we quantified the distribution and community structure of odonates (dragonflies and damselflies) occupying a wetland complex in Texas. When using traditional community metrics, there were no significant differences in diversity or evenness in the odonate assemblages in wetlands surrounded by the two dominant regional forms of land use (tilled cropland and grassland). Similarity analyses likewise failed to detect any significant differences in odonate community composition with land use. Discriminant function analysis, however, revealed that species co‐occurrences could be distinguished on the basis of surrounding land use, which indicates that odonate assemblages in these wetlands are structured in a manner that typical community metrics fail to adequately describe. Differences between the approaches are discussed, particularly with regard to the use of presence–absence data.

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“…Evaluating the impact of sediment accumulation on hydroperiod length, following decades of deposition, will have important implications for recharge estimates and modeling the effects of conservation practices on recharge (e.g., Euliss et al 2011). Despite the potential for altered playas to accumulate contaminants and nutrients from cultivated watersheds, few studies have surveyed contaminant and nutrient levels relative to agricultural effects on the water quality improvement service (Thurman et al 2000, Venne et al 2006.…”

Section: Agricultural Impacts On Playa Functionmentioning

confidence: 99%

Ecosystem services provided by playas in the High Plains: potential influences of USDA conservation programs

Smith

Haukos

McMurry

et al. 2011

Ecological Applications

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Playas are shallow depressional wetlands and the dominant wetland type in the non‐glaciated High Plains of the United States. This region is one of the most intensively cultivated regions in the Western Hemisphere, and playas are profoundly impacted by a variety of agricultural activities. Conservation practices promoted through Farm Bills by the U.S. Department of Agriculture (USDA) that influence playas and surrounding catchments impact ecosystem functions and related services provided by wetlands in this region. As part of a national assessment, we review effects of agricultural cultivation and effectiveness of USDA conservation programs and practices on ecosystem functions and associated services of playas. Services provided by playas are influenced by hydrological function, and unlike other wetland types in the United States, hydrological function of playas is impacted more by accumulated sediments than drainage. Most playas with cultivated catchments have lost greater than 100% of their volume from sedimentation causing reduced hydroperiods. The Conservation Reserve Program (CRP) has the largest influence on playa catchments (the High Plains has >2.8 million ha), and associated sedimentation, of any USDA program. Unfortunately, most practices applied under CRP did not consider restoration of playa ecosystem function as a primary benefit, but rather established dense exotic grass in the watersheds to reduce soil erosion. Although this has reduced soil erosion, few studies have investigated its effects on playa hydrological function and services. Our review demonstrates that the Wetlands Reserve Program (WRP) has seldom been applied in the High Plains outside of south‐central Nebraska. However, this is the primary program that exists within the USDA allowing conservation practices that restore wetland hydrology such as sediment removal. In addition to sediment removal, this practice has the greatest potential effect on improving hydrologic function by reducing sedimentation in vegetative buffer strips. We estimate that a 50‐m native‐grass buffer strip could improve individual playa hydroperiods by up to 90 days annually, enhancing delivery of most natural playa services. The potential for restoration of playa services using USDA programs is extensive, but only if WRP and associated practices are promoted and playas are considered an integral part of CRP contracts.

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Influence of land use on metal concentrations in playa sediments and amphibians in the Southern High Plains

Cited by 19 publications

References 29 publications

Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran

Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran

Community assemblage patterns of odonates inhabiting a wetland complex influenced by anthropogenic disturbance

Ecosystem services provided by playas in the High Plains: potential influences of USDA conservation programs

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