Tuesday, 19 November 2002 - 8:48 AM
0657

This presentation is part of : Ten-Minute Papers, Subsection Cd. Behavior and Ecology (Session 4)

Re-establishment of arthropod assemblages following invasive plant removal

Claudio Gratton and Robert F. Denno. University of Maryland, Department of Entomology, Plant Sciences Building, College Park, MD

Restoration of Phragmites dominated wetlands in southern New Jersey has brought about a rapid return of Spartina and other desirable vegetation in a short period. However, little is know of how arthropods intimately associated with the native plant community respond to the return of Spartina. Our data suggest that free-living arthropod communities rapidly recolonize newly established stands of Spartina. Although there are significant differences in both spider and non-spider arthropod assemblages between Phragmites and Spartina habitats, there was little differentiation in these arthropod assemblages between newly re-established Spartina (5 yrs old) and long-standing stands of Spartina ( 5 yrs old). In contrast, there were differences in the abundance and diversity of internally feeding herbivores between recently re-established stands of Spartina and long-standing stands of Spartina. These results suggest that although in general arthropod assemblages of Spartina return rapidly to pre-Phragmites states, some members of the assemblage are slower to recover after Phragmites removal.

Species 1: Graminaceae Poaceae Spartina alterniflora (Salt marsh cord grass)
Species 2: Graminaceae Poaceae Phragmites australis (Common reed)
Keywords: restoration, food web

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