Climate Change Data Portal
DOI | 10.1007/s10533-019-00538-9 |
Soils in transition: saltwater intrusion alters soil chemistry in agricultural fields | |
Tully, Katherine L.1; Weissman, Danielle1; Wyner, W. Jesse2; Miller, Jarrod3,4; Jordan, Thomas5 | |
发表日期 | 2019 |
ISSN | 0168-2563 |
EISSN | 1573-515X |
卷号 | 142期号:3页码:339-356 |
英文摘要 | As global sea-levels rise, low-lying coastal lands are subject to shallow coastal flooding and saltwater intrusion, affecting the productivity of farmlands worldwide. Soil biogeochemistry can be dramatically altered as saltwater intrudes agricultural fields. We selected three farm fields in Somerset Co., Maryland affected bysaltwater intrusion and established transects from the ditch bank to the center of the cropped field and collected soils (to similar to 140cm) at five points along this transect. The three fields in this study have different soil types, are located along different tributaries in the county, and receive different fertilizer rates, yet they all showed similar biogeochemical responses to saltwater intrusion. We found an increase in electrical conductivity and concentrations of chloride, sulfate, and forms of phosphorus (P) from the center of the field (low) to the ditch banks (high). As inundation increased, the structure of iron (Fe) changed from crystalline to non-crystalline forms, possibly due to dissolution under saturated conditions. Near the edges of the fields, the formation of organometallic complexes was positively associated with increases in soil carbon and organic soil P concentrations. Compared to areas of the fields where crops were actively growing, soil P concentrations are 2-3 higher on field edges, suggesting that saltwater intrusion may be transporting P to the edges of agricultural fields. These field edges are frequently saturated, thus reduction of Fe could lead to P release into solution potentially harming water quality. As climate change pushes saltwater further inland, it is important to understand the biogeochemical consequences for ecosystems up- and downstream. Understanding the how fractions of P move and change across fields affected by saltwater intrusion will be crucial for planning current and future management of coastal agricultural lands. |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
来源期刊 | BIOGEOCHEMISTRY
![]() |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/92437 |
作者单位 | 1.Univ Maryland, Dept Plant Sci & Landscape Architecture, College Pk, MD 20742 USA; 2.Univ Maryland, Dept Environm Sci & Technol, College Pk, MD 20742 USA; 3.Univ Maryland Extens, Somerset Co, 30730 Pk Dr, Princess Anne, MD 21853 USA; 4.Univ Delaware, Carvel Res & Educ Ctr, Plant & Soil Sci, 16483 Cty Seat Highway, Georgetown, DE 19947 USA; 5.Smithsonian Environm Res Ctr, POB 28, Edgewater, MD 21037 USA |
推荐引用方式 GB/T 7714 | Tully, Katherine L.,Weissman, Danielle,Wyner, W. Jesse,et al. Soils in transition: saltwater intrusion alters soil chemistry in agricultural fields[J],2019,142(3):339-356. |
APA | Tully, Katherine L.,Weissman, Danielle,Wyner, W. Jesse,Miller, Jarrod,&Jordan, Thomas.(2019).Soils in transition: saltwater intrusion alters soil chemistry in agricultural fields.BIOGEOCHEMISTRY,142(3),339-356. |
MLA | Tully, Katherine L.,et al."Soils in transition: saltwater intrusion alters soil chemistry in agricultural fields".BIOGEOCHEMISTRY 142.3(2019):339-356. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。