Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.envpol.2018.04.013 |
Mixed method approach to assess atmospheric nitrogen deposition in arid and semi-arid ecosystems | |
Cook, Elizabeth M.1; Sponseller, Ryan2; Grimm, Nancy B.1,3![]() | |
通讯作者 | Cook, Elizabeth M. |
来源期刊 | ENVIRONMENTAL POLLUTION
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ISSN | 0269-7491 |
EISSN | 1873-6424 |
出版年 | 2018 |
卷号 | 239页码:617-630 |
英文摘要 | Arid and semi-arid ecosystems (aridlands) cover a third of Earth’s terrestrial surface and contain organisms that are sensitive to low level atmospheric pollutants. Atmospheric nitrogen (N) inputs to aridlands are likely to cause changes in plant community composition, fire frequency, and carbon cycling and storage. However, few studies have documented long-term rates of atmospheric N inputs in arid-lands because dry deposition is technically difficult to quantify, and extensive sampling is needed to capture fluxes with spatially and temporally heterogeneous rainfall patterns. Here, we quantified long-term spatial and temporal patterns of inorganic N deposition in protected aridland ecosystems across an extensive urban-rural gradient using multiple sampling methods. We compared long-term rates of N deposition from ion-exchange resin (IER) collectors (bulk and throughfall, 2006-2015), wet-dry bucket collectors (2006-2015), and dry deposition from the inferential method using passive samplers (2010-2012). From mixed approaches with IER collectors and inferential methods, we determined that 7.2 +/- 0.4 kgNha(-1)y(-1) is deposited to protected Sonoran Desert within metropolitan Phoenix, Arizona and 6.1 +/- 0.3 kgNha(-1)y(-1) in nearby desert ecosystems. Regional scale models overestimated deposition rates for our sampling period by 60% and misidentified hot spots of deposition across the airshed. By contrast, the easy-deployment IER throughfall collectors showed minimal spatial variation across the urban-rural gradient and underestimated deposition fluxes by 54%, largely because of underestimated dry deposition in throughfall. However, seasonal sampling of the IER collectors over 10 years allowed us to capture significant seasonal variation in N deposition and the importance of precipitation timing. These results, derived from the longest, spatially and temporally explicit dataset in drylands, highlight the need for long-term, mixed methods to estimate atmospheric nutrient enrichment to aridlands in a rapidly changing world. (C) 2018 Elsevier Ltd. All rights reserved. |
英文关键词 | Inorganic nitrogen deposition Aridland ecosystems Dry deposition Urban-rural gradient |
类型 | Article |
语种 | 英语 |
国家 | USA ; Sweden |
收录类别 | SCI-E |
WOS记录号 | WOS:000434744800064 |
WOS关键词 | GASEOUS AMMONIA CONCENTRATIONS ; SAN-BERNARDINO MOUNTAINS ; UNITED-STATES ; DRY DEPOSITION ; INORGANIC NITROGEN ; FOREST ECOSYSTEMS ; CHIHUAHUAN DESERT ; AIR-POLLUTION ; NITRIC-ACID ; URBAN |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/209081 |
作者单位 | 1.Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA; 2.Umed Univ, Dept Ecol & Environm Sci, Umed, Sweden; 3.Arizona State Univ, Julie Ann Wrigley Global Inst Sustainabil, Tempe, AZ 85287 USA |
推荐引用方式 GB/T 7714 | Cook, Elizabeth M.,Sponseller, Ryan,Grimm, Nancy B.,et al. Mixed method approach to assess atmospheric nitrogen deposition in arid and semi-arid ecosystems[J]. Arizona State University,2018,239:617-630. |
APA | Cook, Elizabeth M.,Sponseller, Ryan,Grimm, Nancy B.,&Hall, Sharon J..(2018).Mixed method approach to assess atmospheric nitrogen deposition in arid and semi-arid ecosystems.ENVIRONMENTAL POLLUTION,239,617-630. |
MLA | Cook, Elizabeth M.,et al."Mixed method approach to assess atmospheric nitrogen deposition in arid and semi-arid ecosystems".ENVIRONMENTAL POLLUTION 239(2018):617-630. |
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