Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Changes in Spider (Araneae) Assemblages in Relation to Succession and Grazing Management

C. W. D. Gibson, C. Hambler and V. K. Brown
Journal of Applied Ecology
Vol. 29, No. 1 (1992), pp. 132-142
DOI: 10.2307/2404356
Stable URL: http://www.jstor.org/stable/2404356
Page Count: 11
  • Read Online (Free)
  • Download ($18.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Changes in Spider (Araneae) Assemblages in Relation to Succession and Grazing Management
Preview not available

Abstract

1. Spiders were sampled, by suction (D-vac) and direct counts of their webs, in a controlled sheep grazing experiment on calcareous ex-arable land and in old calcareous grassland. Results from 1985-89 are presented. 2. Heavily grazed assemblages were dominated by a group of Linyphiidae, also characteristic of disturbed land. Large web-spinners were most sensitive to grazing, preferring ungrazed controls because of their dependence on rigid plant structures. 3. DCA ordination of D-vac data suggested that only heavy grazing (in spring and autumn) produced a distinct assemblage. Three other grazed treatments produced impoverished versions of ungrazed control assemblages. 4. The dominant successional trend was a gradual accumulation of species, especially in ungrazed controls. This process was incomplete by 1989: old grasslands contained many species, including some characteristic of calcareous grassland, which had failed to colonize the ex-arable field 7 years after abandonment. 5. Most features of the assemblages could be explained by the effects of grazing on plant architecture, in contrast to other invertebrates studied in the same system, which were more strongly affected by plant species composition.

Page Thumbnails

  • Thumbnail: Page 
132
    132
  • Thumbnail: Page 
133
    133
  • Thumbnail: Page 
134
    134
  • Thumbnail: Page 
135
    135
  • Thumbnail: Page 
136
    136
  • Thumbnail: Page 
137
    137
  • Thumbnail: Page 
138
    138
  • Thumbnail: Page 
139
    139
  • Thumbnail: Page 
[140]
    [140]
  • Thumbnail: Page 
141
    141
  • Thumbnail: Page 
142
    142