Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.landurbplan.2017.02.013 |
Impacts of land clearance by fire on spatial variation of mountain cedar pollen concentrations in Texas | |
Jochner-Oette, Susanne1; Simmons, Mark2; Jetschni, Johanna1; Menzel, Annette3,4 | |
2017-06-01 | |
发表期刊 | LANDSCAPE AND URBAN PLANNING
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ISSN | 0169-2046 |
EISSN | 1872-6062 |
出版年 | 2017 |
卷号 | 162 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; USA |
英文摘要 | Austin, Texas, is one of the worst places with respect to allergies. In winter, mountain cedar (Juniperus ashei) is producing high pollen amounts exerting the so-called cedar fever in individuals allergic to this pollen species. In this study, we evaluated to which extent the effect of prescribed fires in a semi-arid ecosystem decreases pollen concentrations at the local scale. The study was performed on patches characterized by human-induced fire disturbances and unmanaged areas (control sites) in the southwest of Austin. Pollen was sampled on four consecutive days in January 2015 using ten pollen traps installed at 1.5 m a.g.l. Microscope slides were inserted every second hour during 8 am and 6 pm. Each station was equipped with meteorological devices to account for influencing factors such as wind speed and direction. Mean cedar pollen concentrations differed across the studied days and plots and ranged between 633 (16th January) and 126,400 pollen grains/m(3) (17th January). We determined diurnal patterns with peak values between 2 and 3 pm. Pollen concentrations were on average 15% lower at burnt vs. control plots. Comparing pairs of adjacent plots even revealed a reduction of up to 50%. Therefore, local land management can alter pollen concentrations drastically. A walk across previously burnt areas may trigger less severe symptoms for allergic people during the flowering period of mountain cedar. Our results add to the knowledge about individual cedar pollen exposure in heterogeneous areas and help improving mitigation strategies. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Juniperus ashei Plant abundance Prescribed fire Wind |
领域 | 资源环境 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000399627800017 |
WOS关键词 | DIURNAL-VARIATION ; URBANIZATION ; POACEAE ; CLIMATE ; AREAS ; TREE |
WOS类目 | Ecology ; Environmental Studies ; Geography ; Geography, Physical ; Regional & Urban Planning ; Urban Studies |
WOS研究方向 | Environmental Sciences & Ecology ; Geography ; Physical Geography ; Public Administration ; Urban Studies |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24777 |
专题 | 资源环境科学 |
作者单位 | 1.Catholic Univ Eichstatt Ingolstadt, Phys Geog Landscape Ecol & Sustainable Ecosyst De, D-85072 Eichstatt, Germany; 2.Univ Texas Austin, Lady Bird Johnson Wildflower Ctr, Ecosyst Design Grp, Austin, TX 78739 USA; 3.Tech Univ Munich, Dept Ecol & Ecosyst Management, Ecoclimatol, D-85354 Freising Weihenstephan, Germany; 4.Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany |
推荐引用方式 GB/T 7714 | Jochner-Oette, Susanne,Simmons, Mark,Jetschni, Johanna,et al. Impacts of land clearance by fire on spatial variation of mountain cedar pollen concentrations in Texas[J]. LANDSCAPE AND URBAN PLANNING,2017,162. |
APA | Jochner-Oette, Susanne,Simmons, Mark,Jetschni, Johanna,&Menzel, Annette.(2017).Impacts of land clearance by fire on spatial variation of mountain cedar pollen concentrations in Texas.LANDSCAPE AND URBAN PLANNING,162. |
MLA | Jochner-Oette, Susanne,et al."Impacts of land clearance by fire on spatial variation of mountain cedar pollen concentrations in Texas".LANDSCAPE AND URBAN PLANNING 162(2017). |
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