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DOI | 10.1007/s11273-015-9450-2 |
Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA | |
Lane, C. R.; Autrey, B. C. | |
发表日期 | 2016-02-01 |
ISSN | 0923-4861 |
卷号 | 24期号:1页码:45-60 |
英文摘要 | The translocation of phosphorus (P) from terrestrial landscapes to aquatic bodies is of concern due to the impact of elevated P on aquatic system functioning and integrity. Due to their common location in depressions within landscapes, wetlands, including so-called geographically isolated wetlands (GIWs), receive and process entrained P. The ability of depressional wetlands, or GIWs, to sequester P may vary by wetland type or by land use modality. In this study we quantified three measures of P sorption capacities for two common GIW types (i.e., emergent marsh and forested wetlands) in two different land use modalities (i.e., agricultural and least impacted land uses) across 55 sites in Florida, USA. The equilibrium P concentration (EPC0) averaged 6.42 +/- A 5.18 mg P L-1 (standard deviation reported throughout); and ranged from 0.01-27.18 mg P L-1; there were no differences between GIW type or land use modality, nor interaction effects. Significant differences in phosphorus buffering capacity (PBC) were found between GIW types and land use, but no interaction effects. Forested GIWs [average 306.64 +/- A 229.63 (mg P kg(-1)) (A mu g P L-1)(-1)], and GIWs in agricultural settings [average 269.95 +/- A 236.87 (mg P kg(-1)) (A mu g P L-1)(-1)] had the highest PBC values. The maximum sorption capacity (S-max) was found to only differ by type, with forested wetlands (1274.5 +/- A 1315.7 mg P kg(-1)) having over three times the capacity of emergent GIWs (417.5 +/- A 534.6 mg P kg(-1)). Classification trees suggested GIW soil parameters of bulk density, organic content, and concentrations of total P, H2O-extractable P, and HCl-extractable P were important to classifying GIW P-sorption metrics. We conclude that GIWs have high potential to retain P, but that the entrained P may be remobilized to the wetland water column depending on storm and groundwater input P concentrations. The relative hydrologic dis-connectivity of GIWs from other aquatic systems may provide sufficient retention time to retain elevated P within these systems, thereby providing an ecosystem service to downstream waters. |
英文关键词 | Equilibrium phosphorus concentration;Phosphorus buffering capacity;Phosphorus sorption maximum;S-max;Connectivity;Agriculture;Palustrine wetland |
语种 | 英语 |
WOS记录号 | WOS:000370170100005 |
来源期刊 | WETLANDS ECOLOGY AND MANAGEMENT |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/62164 |
作者单位 | US EPA, Off Res & Dev, 26 W Martin Luther King Dr, Cincinnati, OH 45268 USA |
推荐引用方式 GB/T 7714 | Lane, C. R.,Autrey, B. C.. Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA[J]. 美国环保署,2016,24(1):45-60. |
APA | Lane, C. R.,&Autrey, B. C..(2016).Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA.WETLANDS ECOLOGY AND MANAGEMENT,24(1),45-60. |
MLA | Lane, C. R.,et al."Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA".WETLANDS ECOLOGY AND MANAGEMENT 24.1(2016):45-60. |
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