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Titolo:
LONG-TERM EFFECTS OF BRUSH MANAGEMENT ON VEGETATION DIVERSITY IN EPHEMERAL DRAINAGES
Autore:
NOLTE KR; GABOR TM; HEHMAN MW; ASLESON MA; FULBRIGHT TE; RUTLEDGE JC;
Indirizzi:
TEXAS A&M UNIV,CAESAR KLEBERG WILDLIFE RES INST,CAMPUS BOX 218 KINGSVILLE TX 78363 TEXAS A&M UNIV,DEPT AGRON & RESOURCE SCI KINGSVILLE TX 78363 TEXAS PARKS & WILDLIFE DEPT,CHAPPARAL WILDLIFE MANAGEMENT AREA ARTESIA WELLS TX 78001
Titolo Testata:
Journal of range management
fascicolo: 6, volume: 47, anno: 1994,
pagine: 457 - 459
SICI:
0022-409X(1994)47:6<457:LEOBMO>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
TAILED DEER BROWSE; SOUTH TEXAS;
Keywords:
BROWSE; CHAINING; DRAINAGE; ROOT PLOWING; SIMILARITY; WILDLIFE HABITAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
K.R. Nolte et al., "LONG-TERM EFFECTS OF BRUSH MANAGEMENT ON VEGETATION DIVERSITY IN EPHEMERAL DRAINAGES", Journal of range management, 47(6), 1994, pp. 457-459

Abstract

There has been recent concern regarding the effects of range management practices on biodiversity. Our objective was to determine the long-term (>30 years) effects of chaining, and chaining followed by root plowing, on vegetation diversity in an ephemeral drainage system. Plant species richness and diversity were estimated in 2 chained (ca. 1950) areas, and 2 chained (ca. 1950) and root-plowed (ca. 1960) areas, and 2 untreated areas during April 1993. Beta diversity within treatments was estimated with mean dissimilarity (1-mean similarity). Mean similarity was quantified with Jaccard's index. Spatial gradient analysis inwhich pairwise similarities were regressed against the distance between each pair of samples within a site was used to describe similarity within a site. Species richness and diversity were similar among treatments for both herbaceous and woody species. Similarity (Jaccard's index) among transects within a site increased with increasing degree of disturbance. Chained and root plowed sites had lower beta diversity than chained or untreated sites. Similarity in the chained and root plowed sites varied randomly, not spatially, while the control (untreated)and chained sites had negative spatial gradients, indicating spatial heterogeneity within these sites. Although root plowing did not reducespecies richness and diversity as reported on upland sites in previous studies, beta diversity and habitat heterogeneity were lower on chained and root plowed sites than on chained or untreated sites.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:24:52