Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly
文献类型：期刊论文
| 作者 | Zhao, QH; Pan, Y; Griffin, JN; Sun, JZ; Sun, SC; Sun, SC (reprint author), Nanjing Univ, Dept Biol, Coll Life Sci, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China. |
| 刊名 | FRESHWATER BIOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 61期号:5页码:693-701 |
| 关键词 | Algae–cladoceran–damselfly Species Interaction Habitat Structures Trophic Cascade Morphology |
| DOI | 10.1111/fwb.12739 |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | The presence of habitat structures (e.g. caves, ledges, branches) has well-documented ecological effects. However, it remains largely unknown how variation in the morphology of particular habitat structures affects ecological interactions. Using an algae-cladoceran grazer-larval damselfly food chain as a model in a series of microcosm experiments, we manipulated food-chain length and the length (long versus short) and diameter (thick versus thin) of vertically orientated damselfly perches (habitat structure) and examined the density of the grazers and algae. Because the larval damselflies are usually more flexible on thinner perches and have broader foraging domains on longer perches, we predicted that when on long and thin perches they would suppress grazer density more efficiently and hence confer a more positive trophic-cascade effect on algal growth. As predicted, larval damselflies occupying long and thin perches most strongly reduced grazer density and increased algal density, illustrating a positive trophic cascade. In all other damselfly treatments, and despite reduced grazer density, algal density declined, showing a negative trophic cascade due to an elevation in grazer foraging efficiency under predation risk. This probably resulted from the increased activity of the grazers and their spatial shift to the lower water column where algal density was higher. In conclusion, perch morphology affected the direction and strength of the trophic cascade by altering both density-mediated and behaviour-mediated indirect interactions. Considering that anthropogenic disturbance is dramatically changing the morphological diversity of habitat structures, we call for more research into the ecological consequences of such physical diversity at community and ecosystem levels. |
| 学科主题 | Marine & Freshwater Biology |
| 资助项目 | 中国科学院山地生态恢复与生物资源利用重点实验室 |
| 语种 | 英语 |
| 资助机构 | 973 Program [2013CB956300] ; 973 Program [2013CB956300] ; National Science Foundation of China [31470482, 31325004] ; National Science Foundation of China [31470482, 31325004] ; 'PCSIRT' [IRT_14R27] ; 'PCSIRT' [IRT_14R27] ; 973 Program [2013CB956300] ; 973 Program [2013CB956300] ; National Science Foundation of China [31470482, 31325004] ; National Science Foundation of China [31470482, 31325004] ; 'PCSIRT' [IRT_14R27] ; 'PCSIRT' [IRT_14R27] |
| 源URL | [http://210.75.237.14/handle/351003/28132]  |
| 专题 | 成都生物研究所_生态研究 |
| 通讯作者 | Sun, SC (reprint author), Nanjing Univ, Dept Biol, Coll Life Sci, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Zhao, QH,Pan, Y,Griffin, JN,et al. Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly[J]. FRESHWATER BIOLOGY,2016,61(5):693-701. |
| APA | Zhao, QH,Pan, Y,Griffin, JN,Sun, JZ,Sun, SC,&Sun, SC .(2016).Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly.FRESHWATER BIOLOGY,61(5),693-701. |
| MLA | Zhao, QH,et al."Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly".FRESHWATER BIOLOGY 61.5(2016):693-701. |
入库方式： OAI收割
来源：成都生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。