DOI: 10.1016/j.foreco.2015.12.011
Scopus记录号: 2-s2.0-84951265509
论文题名: Effects of forest management on physical habitats and fish assemblages in Iberian eucalypt streams
作者: Oliveira J.M. ; Fernandes F. ; Ferreira M.T.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 363 起始页码: 1
结束页码: 10
语种: 英语
英文关键词: Agriculture
; Best management practices
; Eucalypt plantations
; Fish assemblages
; Iberian streams
; Riparian condition
Scopus关键词: Agriculture
; Catchments
; Ecosystems
; Fish
; Land use
; Rivers
; Timber
; Vegetation
; Best management practices
; Eucalypt plantations
; Fish assemblages
; Iberian streams
; Riparian condition
; Forestry
; Gobio
英文摘要: In Portugal, more than 150,000 ha of eucalypt plantations are managed under best management practices (BMP), in compliance with international certification systems. Some of these forestry areas extend to streams, and the riparian areas are thus protected from productive land uses. However, many other eucalypt plantations present riparian zones that are not managed under BMP and are often occupied by agricultural uses. To test the effects of forest management on physical habitats and fish assemblages in Iberian eucalypt streams, we selected three different stream reach types: (1) reaches in catchments dominated by native vegetation associations, and presenting semi-natural riparian zones (reference-REF); (2) reaches surrounded by certified eucalypt plantations (i.e., managed under BMP), and consequently, presenting protected riparian buffer zones (PRZ); and (3) reaches surrounded by eucalypt plantations (dominant) and some oak forests, and presenting disturbed riparian zones with agricultural land use (DRZ). All sites represented small, low-gradient, warmwater streams in Central Portugal (Tagus basin), and their upstream land cover was dominated by natural/semi-natural uses. PRZ sites were abiotically similar to REF sites, although PRZ sites generally presented lower potential cover for fish and tended to support a riparian vegetation that was a little more fragmented. PRZ sites supported fish assemblages that were similar to those in reference reaches, although at the functional level we found a higher abundance of native invertivores in REF sites. DRZ reaches, on the other hand, differed substantially from the other two groups. DRZ sites presented disturbed riparian vegetation (removal or substitution of native trees by exotic and/or non-woody species), eroded and modified channels, and a degradation of stream habitats (lack of riffle-poll complexes, higher silt contents, and lower potential cover for fish). The fish assemblages were also quite different, with a higher abundance of alien specimens (mainly Gobio lozanoi) and generalist spawners, and a lower proportion of native invertivores and lithophils. Riffles and morphological alteration explained the greatest proportion of variance in species composition. Our study showed that protecting stream riparian zones by implementing BMP may mitigate the effects of eucalypt forestry on Iberian fish assemblages. However, given that there are a few differences in physical condition and biological integrity between streams associated with certified plantations and reference streams we suggest additional riparian management measures in the certified areas, such as restoration of the native vegetation, removal of alien plants, and improvement of the stream habitat. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65061
Appears in Collections: 影响、适应和脆弱性
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作者单位: Forest Research Centre (CEF), School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisbon, Portugal
Recommended Citation:
Oliveira J.M.,Fernandes F.,Ferreira M.T.. Effects of forest management on physical habitats and fish assemblages in Iberian eucalypt streams[J]. Forest Ecology and Management,2016-01-01,363