Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Effects of local land use on physical habitat, benthic macroinvertebrates,and fish in the Whitewater River, Minnesota, USA
Autore:
Nerbonne, BA; Vondracek, B;
Indirizzi:
Univ Minnesota, Dept Fisheries & Wildlife, Minnesota Cooperat Fish & Wildlife Res Unit, St Paul, MN 55108 USA Univ Minnesota St Paul MN USA 55108 dlife Res Unit, St Paul, MN 55108 USA
Titolo Testata:
ENVIRONMENTAL MANAGEMENT
fascicolo: 1, volume: 28, anno: 2001,
pagine: 87 - 99
SICI:
0364-152X(200107)28:1<87:EOLLUO>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
MULTIPLE SPATIAL SCALES; BIOTIC INTEGRITY; WATER-QUALITY; STREAM HABITATS; BUFFER STRIPS; NORTH-AMERICA; MANAGEMENT; SEDIMENT; COMMUNITIES; POLLUTION;
Keywords:
riparian areas; wooded buffers; grass buffers; BMPs; aquatic insects; fish; physical habitat; stream theory;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
88
Recensione:
Indirizzi per estratti:
Indirizzo: Vondracek, B Univ Minnesota, Dept Fisheries & Wildlife, Minnesota CooperatFish & Wildlife Res Unit, 1980 Folwell Ave, St Paul, MN 55108 USA Univ Minnesota 1980 Folwell Ave St Paul MN USA 55108 5108 USA
Citazione:
B.A. Nerbonne e B. Vondracek, "Effects of local land use on physical habitat, benthic macroinvertebrates,and fish in the Whitewater River, Minnesota, USA", ENVIR MANAG, 28(1), 2001, pp. 87-99

Abstract

Best management practices (BMPs) have been developed to address soil loss and the resulting sedimentation of streams, but information is lacking regarding their benefits to stream biota. We compared instream physical habitatand invertebrate and fish assemblages from farms with BMP to those from farms with conventional agricultural practices within the Whitewater River watershed of southeastern Minnesota, USA, in 1996 and 1997, Invertebrate assemblages were assessed using the US EPA's rapid bioassessment protocol (RBP), and fish assemblages were assessed with two indices of biotic integrity (IBIs), Sites were classified by upland land use (BMP or conventional practices) and riparian management (grass, grazed, or wooded buffer). Physical habitat characteristics differed across buffer types, but not upland land use, using an analysis of covariance, with buffer width and stream as covariates. Percent fines and embeddedness were negatively correlated with buffer width. Stream sites along grass buffers generally had significantly lower percent fines, embeddedness, and exposed streambank soil, but higher percent cover and overhanging vegetation when compared with sites that had grazed or wooded buffers. REP and IBI scores were not significantly different across upland land use or riparian buffer type but did show several correlationswith instream physical habitat variables. REP and IBI scores were both negatively correlated with percent fines and embeddedness and positively correlated with width-to-depth ratio. The lack of difference in REP or IBI scores across buffer types suggests that biotic indicators may not respond to local changes, that other factors not measured may be important, or that greater improvements in watershed condition are necessary for changes in biota to be apparent. Grass buffers may be a viable alternative for riparian management, especially if sedimentation and streambank stability are primary concerns.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 05:48:29