Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2018.08.016 |
Herbaceous-layer diversity and tree seedling recruitment are enhanced following Rhododendron maximum shrub removal | |
Elliott, Katherine J.; Miniat, Chelcy F. | |
2018-12-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2018 |
卷号 | 430页码:403-412 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Forest ecosystems dominated by Tsuga canadensis are undergoing fundamental changes in function and composition from infestations by hemlock woolly adelgid (Adelges tsugae). We proposed that the first step to restoring southern Appalachian riparian forests following T. canadensis mortality would be eliminating the evergreen shrub, Rhododendron maximum. We hypothesized that removing R. maximum would increase light transmittance, soil moisture and temperature; and subsequently, enhance herbaceous-layer diversity and promote tree seedling recruitment and survival. We tested these hypotheses at two locations, (CWT, Coweeta Hydrologic Laboratory; WOC, White Oak Creek) in the Nantahala Mountain Range of western North Carolina, both with heavy T. canadensis mortality and a dense R. maximum subcanopy. The treatments were designed to remove only soil O-horizon (FF), remove only R. maximum (CR), remove R. maximum and soil O-horizon (CFFR), and untreated, reference (REF). We installed permanent plots across treatments and locations and measured light transmittance (Q(i/)Q(o)), soil water content (theta), herbaceous-layer cover and diversity (Shannon's index (H'(cover)) and species richness), and tree seedling recruitment. As expected, cutting the R. maximum subcanopy (CR and CFFR) immediately increased Q(i)/Q(o), in the spring months across locations, and it was sustained through the first growing season. theta was generally high across plots, averaging 26% during the growing season, and didn't vary over time. By the second growing season (2017) after treatments, herbaceous-layer cover and diversity increased on CR and CFFR. Herbaceous-layer cover was significantly related to Q(i)/Q(o), (r(2) = 0.22, p < 0.001) and theta (r(2) = 0.13, p = 0.009), while diversity was only related to Q(i)/Q(o)(H'(cover),r(2) = 0.14, p < 0.001; species richness, r(2) = 0.21, p < 0.001). Tree seedling density was related to Q(i)/Q(o). (r(2) = 0.10, p = 0.001) and theta (r(2) = 0.26, p < 0.001). Tree seedling density was low before treatment (1.4 +/- 0.3 seedlings m(-2)) and increased by 10-fold in CR and CFFR two growing seasons after treatment. In CR, species with the highest density ranked Betula spp. > Acer rubrum > Quercus coccinea > Liriodendron tulipifera > Q. rubra. In CFFR, tree seedling recruitment ranked Betula spp. > A. rubrum > L. tulipifera. These vegetation responses have important implications for potential recovery of riparian forests following T. canadensis mortality. |
英文关键词 | Hemlock Tsuga canadensis Restoration Prescribed fire Evergreen shrub Southern Appalachians |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449137300039 |
WOS关键词 | SOUTHERN APPALACHIAN FOREST ; LONG-TERM ; SPECIES COMPOSITION ; HEMLOCK MORTALITY ; TSUGA-CANADENSIS ; EVERGREEN UNDERSTORY ; SPATIAL-PATTERNS ; ACORN PRODUCTION ; CANOPY GAPS ; IMPACTS |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
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/23348 |
专题 | 气候变化 |
作者单位 | US Forest Serv, Coweeta Hydrol Lab, Ctr Forest Watershed Res, Southern Res Stn,USDA, 3160 Coweeta Lab Rd, Otto, NC 28763 USA |
推荐引用方式 GB/T 7714 | Elliott, Katherine J.,Miniat, Chelcy F.. Herbaceous-layer diversity and tree seedling recruitment are enhanced following Rhododendron maximum shrub removal[J]. FOREST ECOLOGY AND MANAGEMENT,2018,430:403-412. |
APA | Elliott, Katherine J.,&Miniat, Chelcy F..(2018).Herbaceous-layer diversity and tree seedling recruitment are enhanced following Rhododendron maximum shrub removal.FOREST ECOLOGY AND MANAGEMENT,430,403-412. |
MLA | Elliott, Katherine J.,et al."Herbaceous-layer diversity and tree seedling recruitment are enhanced following Rhododendron maximum shrub removal".FOREST ECOLOGY AND MANAGEMENT 430(2018):403-412. |
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