Abstract


THE RIPARIAN CONTINUUM CONCEPT: SPIDERS AND CROSS ECOSYSTEM SUBSIDIES ALONG THE RIVER CONTINUUM

Emerging aquatic insects are important cross ecosystem subsidies to riparian ecosystems and elicit responses in riparian predators. Flux of emerging insects into the riparian zone is determined by secondary production per unit area and stream width, while particular taxa emerging are dependent on location within the river continuum as described by the river continuum concept. Riparian spider communities appear to be particularly influenced by emergence events due to their various feeding strategies and ability to track preferred prey. However, little work has been conducted on the relationship between spider guilds and aquatic insect emergence patterns. We hypothesized 1) spiders using different hunting strategies may be distributed in a predictable manner along the river continuum and 2) spider biomass would correlate with aquatic insect emergence. We collected riparian spiders and emerging insects from 1st-7th order streams. Preliminary results indicate this pattern may exist. Horizontal orb-weavers were much more abundant at 3rd-7th order streams while vertical orb-weavers dominated the first order stream. Spider abundance was highest at the 5th and 7th order sites.

Authors

King, N. R., Bucknell University, USA, nrk005@bucknell.edu

McTammany, M. E., Bucknell University, USA, mmctamma@bucknell.edu

Reilly, M. E., Bucknell University, USA

Details

Poster presentation

Session #:050
Date: 5/20/2014
Time: 18:00 - 20:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: 191