The roles of beetles and flies in yak dung removal in an alpine meadow of eastern Qinghai-Tibetan Plateau
文献类型：期刊论文
| 作者 | Wu, Xinwei ; Sun, Shucun |
| 刊名 | ECOSCIENCE
 |
| 出版日期 | 2010 |
| 卷号 | 17期号:2页码:146-155 |
| 关键词 | alpine meadow beetle dung removal ecosystem function fly functional diversity |
| ISSN号 | 1195-6860 |
| 通讯作者 | Sun, SC, Chinese Acad Sci, ECORES Lab, Chengdu Inst Biol, Chengdu 610041, Peoples R China |
| 中文摘要 | Flies and beetles are 2 major functional invertebrate groups responsible for dung removal and nutrient cycling in many alpine pastures. In order to determine the effect of the 2 groups on dung removal rate, as well as the associated mechanisms, we conducted a two-factor, two-level factorial-designed experiment in an alpine meadow of eastern Qinghai-Tibetan Plateau. Four treatments were included: (A) flies excluded, beetles included; (B) beetles excluded, flies included; (C) both flies and beetles excluded; and (D) both flies and beetles included, each having 45 replicates of artificial dung pats (17 cm in diameter; ca. 248 g in dry weight). We examined dung quality, removal rates, and abundance and biomass of macro-soil faunas within the dung 9 times (5 replicates sampled each time) during the experimental period of 32 d. Both beetles and flies (maggots), as well as the interaction between the 2 groups, markedly affected the dung removal rates. The total dry weight loss of the dung during the experiment was 167.6 g and 127.5 g on average for the beetle and fly groups, respectively. The removal rate in terms of both dung weight and organic matter loss was significantly greater for the beetles than the flies, which was principally because the consumption rate was lower and the resident time was shorter for fly maggots than for the beetles. The coexistence of the 2 species increased dung removal synergistically on the first sampling day and additively between the 2(nd) and the 5(th) day. However, after the 8(th) day of the experiment, the coexistence effect was negative, such that the dung loss of treatment D was comparable to treatment A but significantly greater than treatment B. The synergistic control might be due to the mediating effect of predator beetles on the relative abundance of coprophagous beetles and maggots, and the negative effect of the functional group diversity was because of the overwhelming competitive advantage of the beetles over fly maggots. In conclusion, although both fly and beetle species may significantly contribute to dung removal, the effect of the interaction between flies and beetles appears to depend on dung age (the sampling timing) in the alpine meadow. |
| 学科主题 | Ecology |
| 收录类别 | SCI |
| 资助信息 | Chinese Academy of Sciences [KZCX2-XB2-02]; Chinese Ministry of Sciences and Technology [2008CB418201]; ECORES lab of Sichuan Province |
| 语种 | 英语 |
| 公开日期 | 2011-07-08 |
| 源URL | [http://210.75.237.14/handle/351003/22546]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Wu, Xinwei,Sun, Shucun. The roles of beetles and flies in yak dung removal in an alpine meadow of eastern Qinghai-Tibetan Plateau[J]. ECOSCIENCE,2010,17(2):146-155. |
| APA | Wu, Xinwei,&Sun, Shucun.(2010).The roles of beetles and flies in yak dung removal in an alpine meadow of eastern Qinghai-Tibetan Plateau.ECOSCIENCE,17(2),146-155. |
| MLA | Wu, Xinwei,et al."The roles of beetles and flies in yak dung removal in an alpine meadow of eastern Qinghai-Tibetan Plateau".ECOSCIENCE 17.2(2010):146-155. |
入库方式： OAI收割
来源：成都生物研究所
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