Assessment of the Effects of Farming and Conservation Programs on Pesticide Deposition in High Plains Wetlands

被引:44
作者
Belden, Jason B. [1 ]
Hanson, Brittany Rae [1 ]
McMurry, Scott T. [1 ]
Smith, Loren M. [1 ]
Haukos, David A. [2 ]
机构
[1] Oklahoma State Univ, Dept Zool, Stillwater, OK 74078 USA
[2] Texas Tech Univ, Dept Nat Resources Management, Lubbock, TX 79409 USA
关键词
TOXICITY; BIOAVAILABILITY; HERBICIDES; PENDIMETHALIN; SEDIMENT;
D O I
10.1021/es300316q
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We examined pesticide contamination in sediments from depressional playa wetlands embedded in the three dominant land-use types in the western High Plains and Rainwater Basin of the United States including cropland, perennial grassland enrolled in conservation programs (e.g., Conservation Reserve Program [CRP]), and native grassland or reference condition. Two hundred and sixty four playas, selected from the three land-use types, were sampled from Nebraska and Colorado in the north to Texas and New Mexico in the south. Sediments were examined for most of the commonly used agricultural pesticides. Atrazine, acetochlor, metolachlor, and trifluralin were the most commonly detected pesticides in the northern High Plains and Rainwater Basin. Atrazine, metolachlor, trifluralin, and pendimethalin were the most commonly detected pesticides in the southern High Plains. The top 5-10% of playas contained herbicide concentrations that are high enough to pose a hazard for plants. However, insecticides and fungicides were rarely detected. Pesticide occurrence and concentrations were higher in wetlands surrounded by cropland as compared to native grassland and CRP perennial grasses. The CRP, which is the largest conservation program in the U.S., was protective and had lower pesticide concentrations compared to cropland.
引用
收藏
页码:3424 / 3432
页数:9
相关论文
共 32 条
[31]  
USDA National Agricultural Statistics Service, AGR CHEM US DAT
[32]   Organochlorine pesticide concentrations in sediment and amphibian tissue in playa wetlands in the Southern High Plains, USA [J].
Venne, Louise S. ;
Anderson, Todd A. ;
Zhang, Baohong ;
Smith, Loren M. ;
McMurry, Scott T. .
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 2008, 80 (06) :497-501