Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.08.033 |
Rodent-mediated seed dispersal of Juglans mandshurica regulated by gap size and within-gap position in larch plantations: Implication for converting pure larch plantations into larch-walnut mixed forests | |
Wang, Jing1,2,3; Yan, Qiaoling1,2; Yan, Tao1,2,3; Song, Yuan1,2,3; Sun, Yirong1,2; Zhu, Jiaojun1,2 | |
2017-11-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 404 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Larch (Larbc spp.) is planted extensively after clear-cut of secondary forests in Northeast China to satisfy the enormous timber demands. However, some serious problems arise in larch plantations (LPs) due to mono-species composition, such as a decline in soil fertility and acidification of surface runoff. Converting pure LPs into larch broadleaf mixed forests would resolve these issues. Since larch-walnut mixed forests are mutually beneficial, it is crucial to promote the regeneration of Juglans mandshurica in LPs. Rodent-mediated seed dispersal of J. mandshurica determines the regeneration success or failure and is closely related to stand structure. Forest gaps are formed by an uneven thinning that changes stand structure in plantation management; the gap size and within gap position are two key characteristics that affect tree regeneration by changing the micro-environment. We hypothesized that rodent-mediated walnut seed dispersal were strongly influenced by these two key factors. The field trial was conducted by releasing tagged J. mandshurica seeds in two sizes of artificial gaps in LPs (small and medium gaps) and at four positions (south, north, east and west) of the gap edges. The seed releases were conducted at three stages of seed rain (early, middle and final stages) during two continuous growing seasons. Our results showed that only the seed removal rate was significantly affected by gap size and within-gap position; the rate in medium gaps was significantly higher than that in small gaps (Wald = 24.57, df = 1, P < 0.001), and the rate at the east position of gaps was dramatically higher than other three positions (Wald = 67.10, df = 3, P < 0.001). Inter-annual variation of seed production caused a faster removal rate (2.86 grains/day) with larger cache proportion (43.27%) and shorter dispersal distance (7.84 m) in the non-mast year (2015) and vice versa in the mast year (2016). Although the proportion of J. mandshurica seeds cached in the canopy gaps by rodents (7.00%) was significantly lower than in the understory (33.38%), more photophilous walnut seeds can germinate and form seedlings in gaps because of more suitable environment conditions (especially sufficient light) and a lower risk of pilferage. The effects of gap size and within-gap position on seed dispersal are not as we expected, but creating gaps in larch plantations, especially with larger sizes, is a potentially feasible practice to convert plantations into larch-walnut mixed forests by promoting rodent-mediated seed dispersal and potential seed germination of J. mandshurica. |
英文关键词 | Seed removal rate Seed dispersal distance Seed fate Mast year Seed rain |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413384000020 |
WOS关键词 | TEMPERATE SECONDARY FOREST ; NORTHEAST CHINA ; MONTANE REGIONS ; REGENERATION ; IMPACT ; DISTURBANCE ; UNDERSTORY ; SQUIRRELS ; PREDATION ; SELECTION |
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/22419 |
专题 | 气候变化 |
作者单位 | 1.Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China; 2.Chinese Acad Sci, Qingyuan Forest CERN, Shenyang 110016, Liaoning, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Jing,Yan, Qiaoling,Yan, Tao,et al. Rodent-mediated seed dispersal of Juglans mandshurica regulated by gap size and within-gap position in larch plantations: Implication for converting pure larch plantations into larch-walnut mixed forests[J]. FOREST ECOLOGY AND MANAGEMENT,2017,404. |
APA | Wang, Jing,Yan, Qiaoling,Yan, Tao,Song, Yuan,Sun, Yirong,&Zhu, Jiaojun.(2017).Rodent-mediated seed dispersal of Juglans mandshurica regulated by gap size and within-gap position in larch plantations: Implication for converting pure larch plantations into larch-walnut mixed forests.FOREST ECOLOGY AND MANAGEMENT,404. |
MLA | Wang, Jing,et al."Rodent-mediated seed dispersal of Juglans mandshurica regulated by gap size and within-gap position in larch plantations: Implication for converting pure larch plantations into larch-walnut mixed forests".FOREST ECOLOGY AND MANAGEMENT 404(2017). |
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