Water and nutrient budgets for Vancouver Lake, Vancouver, Washington, October 2010-October 2012

Abstract

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The effects of eutrophication and invasive species on zooplankton community dynamics in a shallow temperate lake

“…In particular, PO 4 -P availability in Vancouver Lake may have had an indirect influence on summertime zooplankton community composition through the stimulation of cyanobacterial blooms. Increased orthophosphate concentrations during summer months in Vancouver Lake were most likely due to a combination of several processes, including wind driven sediment resuspension (Sheibley et al 2014), anoxia at the sediment-water interface (Lee et al 2015a), and possibly the release of PO 4 -P due to grazing (Frost et al 2004). Recently, Lee et al (2015a) demonstrated that peaks in PO 4 -P concentration were significantly associated with the occurrence and duration of large cyanobacterial blooms that occurred in Vancouver Lake during each summer from 2007 to 2009.…”

“…Kend-all's tau (τ b ) was then used to examine concordance among sites and demonstrated no significant spatial differences in plankton community composition (n = 10 per site, p > 0.05) (Bollens & Rollwagen-Bollens 2009). Additionally, the depth at the end of the dock sampling site has been shown to be representative of the mean depth of the lake (Sheibley et al 2014). Based on these results, and ease of access, all subsequent sampling was conducted from the end of the dock located just south of Burnt Bridge Creek (Fig.…”