Functional Response to Resource Change across LTER Sites (Biodiversity of Riparian Ecotones)

Workshop Proposal: Biodiversity of Riparian Ecotones As ecotones between aquatic and terrestrial ecosystems, riparian zones are templates for the dynamic exchange of energy, nutrients and biological interactions. Recent studies in headwater systems have suggested that these exchanges constitute reciprocal subsidies (sensu Polis et al. 1996) between streams and terrestrial riparian habitats (Nakano & Murakami 2000;… Read more »

Synthetic Effort to Characterize the Controls on Nitrogen Transportation through Streams & Rivers

Proposal to for a workshop to assess needs for a large-scale cross-site synthetic effort to characterize the controls on nitrogen transport through streams and rivers Background Human sources now rival natural sources of fixed N to the biosphere, changing the biogeochemistry of both terrestrial and aquatic environments by adding biologically available N, primarily from fossil… Read more »

Species Richness in Space and Time

Estimating the number of species in a community or ecosystem is a fundamental problem in basic and conservation ecology. Basic researchers use biodiversity estimates to study latitudinal diversity gradients, to determine relationships between local and regional diversity, and as a response variable in manipulative experiments. Conservation ecologists use such estimates to prioritize conservation efforts (Myers et al. 2000) and predict species losses due to fragmentation (Pimm and Askins 1995, Brooks et al. 1997).