Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/fwb.12464 |
Effects of longitudinal and lateral stream channel complexity on native and non-native fishes in an invaded desert stream | |
Franssen, Nathan R.1,2; Gilbert, Eliza I.3; Propst, David L.1,2 | |
通讯作者 | Franssen, Nathan R. |
来源期刊 | FRESHWATER BIOLOGY
![]() |
ISSN | 0046-5070 |
EISSN | 1365-2427 |
出版年 | 2015 |
卷号 | 60期号:1页码:16-30 |
英文摘要 | Understanding how habitat heterogeneity influences the structure of communities has been a longstanding goal of ecologists. Identifying how stream channel complexity affects fishes will be particularly important in systems simplified by anthropogenic activities and encroachment of non-native riparian vegetation. Here, we assessed how large-scale longitudinal distribution of lateral stream channel complexity from anthropogenically channelised, naturally braided and canyon-bound reaches of the San Juan River in New Mexico and Utah, U.S.A., correlated with species richness, evenness and the relative abundance of small-bodied native and non-native fishes. We also contrasted fish assemblages at a smaller scale, in the most laterally complex reach of the river, by comparing fish assemblages between primary channel and secondary channel habitats as well as in newly restored secondary channels. Rarefied fish species richness was generally highest in the braided reach of the river and the longitudinal distribution of total fish densities varied temporally. Contrary to our predictions, native fish densities were highest in the most upstream and anthropogenically channelised reach of the river. Non-native fish densities tended to be highest in the downstream braided reach, and all fishes were sparse in the least complex canyon-bound reach. Total fish densities were higher in secondary channels compared with primary channels, and non-native fishes were responsible for this difference. Fish assemblages in recently restored secondary channels were generally similar to those in naturally occurring ones. Our results suggest that lateral channel complexity can facilitate greater species richness at larger scales and is likely to provide habitats for fishes that are rare or not found in larger primary channels. These findings also suggest reduced channel complexity may lower the ability of riverine systems to support diverse fish assemblages. |
英文关键词 | channel braiding channel simplification habitat complexity invasive species stream restoration |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000346069800002 |
WOS关键词 | SAN-JUAN RIVER ; REGULATED CALIFORNIA STREAM ; FLOW REGIME ; NEW-MEXICO ; HABITAT COMPLEXITY ; SPECIES RICHNESS ; ASSEMBLAGES ; RESTORATION ; COMMUNITIES ; DIVERSITY |
WOS类目 | Ecology ; Marine & Freshwater Biology |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/187338 |
作者单位 | 1.Univ New Mexico, Dept Biol, Albuquerque, NM 87171 USA; 2.Univ New Mexico, Museum Southwestern Biol, Albuquerque, NM 87171 USA; 3.New Mexico Dept Game & Fish, Fisheries Management Div, Santa Fe, NM USA |
推荐引用方式 GB/T 7714 | Franssen, Nathan R.,Gilbert, Eliza I.,Propst, David L.. Effects of longitudinal and lateral stream channel complexity on native and non-native fishes in an invaded desert stream[J],2015,60(1):16-30. |
APA | Franssen, Nathan R.,Gilbert, Eliza I.,&Propst, David L..(2015).Effects of longitudinal and lateral stream channel complexity on native and non-native fishes in an invaded desert stream.FRESHWATER BIOLOGY,60(1),16-30. |
MLA | Franssen, Nathan R.,et al."Effects of longitudinal and lateral stream channel complexity on native and non-native fishes in an invaded desert stream".FRESHWATER BIOLOGY 60.1(2015):16-30. |
条目包含的文件 | 条目无相关文件。 |
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。