Seasonal abundance, community composition, and silica content of diatoms epiphytic on Cladophora glomerata

Distribution of seston and nutrient concentrations in the eastern basin of Lake Erie pre- and post-dreissenid mussel invasion

“…In the nearshore of the eastern basin, we could be seeing a shift from diatom dominated benthos to green alga dominated (Cladophora). However, the impact of this shift on Si dynamics is unclear as Cladophora can also increase the surface area available for colonization of epiphytic diatoms as seen in Lake Ontario (Malkin et al, 2009). In Saginaw Bay, Johengen et al (1995) also found higher Si concentrations at mussel-impacted inner bay sites relative to outer bay and control sites.…”

Biomarkers of algal populations in phytoplankton, filamentous algae, and sediments from the eastern basin of Lake Erie 2003–2005

“…Cocconeis pediculus are well-known epiphytic diatoms on Cladophora (Stevenson and Stoermer, 1982;Malkin et al, 2009). These diatoms were found with nearly all flat filaments identified as C. glomerata, in some cases, completely covering the surface (Fig.…”

“…We hypothesized that specimens would contain predominantly chlorophyte pigments from Cladophora glomerata, which has proliferated (median biomass 170 g dw/m 2 , nearshore eastern Lake Erie, 1995Erie, to 2002Higgins et al, 2005), in response to the increased clarity of nearshore waters filtered by dreissenids, coupled with release of nutrients (Howell et al, 1996). In addition, we expected lesser amounts of diagnostic pigments from epiphytic diatoms (Stevenson and Stoermer, 1982;Malkin et al, 2009), cyanobacteria and a rhodophyte imported from marine waters (Sheath and Morison, 1982). Differences between sites were expected, from the fact that VBP is shallow (6.5 m) with coarse sediments and 5.4% organic matter, compared to PG which is deeper (17 m), with fine sediments and 14.8% organic matter (Bridoux et al, submitted for publication).…”

Biological and chemical contaminants as drivers of change in the Great Lakes–St. Lawrence river basin

“…Over the past two decades, shoreline fouling by the green alga Cladophora (Malkin et al, 2009), cyanobacterial blooms, and tasteand-odor reports have re-emerged and are increasing in frequency in small inland lakes within the basin (Winter et al, 2011), posing the risk of entering the basin when hydrologically connected (Table 1). cHABs and other nuisance blooms are also now reported in mesotrophic lakes in the basin where blooms have not previously been reported (Carey et al, 2008).…”