The Effects of Ultraviolet Radiation and Nutrient Additions on Periphyton Biomass and Composition in a Sub-Alpine Lake (Castle Lake, USA)

Higley,; Carrick, H.J.; Brett, M.T.; Luecke, C.; Goldman, C.R.

doi:10.1002/1522-2632(200104)86:2<147::aid-iroh147>3.3.co;2-p

Cited by 8 publications

(13 citation statements)

References 24 publications

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“…5 DISCUSSION Several investigations of the effects of UV radiation by exclusion of ambient UV observed reduced chl a accrual within +UV treatments in lakes Leavit 1996, Francoeur andLowe 1998) and artificial streams (Bothwell et al 1994, Hodoki 2005. In contrast, other studies conducted in lakes (Higley et al 2001, Watkins et al 2001), a wetland (Kahn and Wetzel 1999), and a stream (Hill et al 1997) found no significant differences in periphytic algal biomass between fill ambient sunlight (+UV) and PAR-only (-UV) treatments. In the present study, algal biomass appeared to be unaffected by W exposure.…”

Section: Resultscontrasting

confidence: 97%

“…In our experiment, overall algal community composition did not vary strongly by UV treatment, in contrast with some previous studies (Bothwell et al 1993, Francoeur and Lowe 1998, Higley et al 2001. Perhaps the shallowness of the wetland water and the lack of a surface connection to any other body of water restricted the pool of potential algal taxa to those relatively tolerant to UV exposure.…”

Section: Resultsmentioning

confidence: 99%

“…Shifts in algal species composition have also been observed in longer-term studies, with sensitivity to UV varying by taxon (Bothwell et al 1993, Vinebrooke and Leavitt 1996, Francoeur and Lowe 1998, Higley et al 2001). …”

Section: Introductionmentioning

confidence: 92%

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Effects of UV Radiation on Wetland Periphyton: Algae, Bacteria, and Extracellular Polysaccharides

Thomas¹,

Kuehn²,

Francoeur³

2009

Journal of Freshwater Ecology

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To study the effects of UV radiation on wetland periphyton, glass substrata were placed under acrylic mesocosms in a small freshwater marsh in Michigan, USA. One treatment excluded light in the UV range (<400nm), and another allowed the passage of all light. Substrata were sampled on four dates during August and September 2004. Chlorophyll a, algal community composition, ash-free dry mass, bacterial density and viability, and total extracellular polysaccharide (EPS) content were measured. Algal biomass, algal community composition, bacterial abundance, and ash-free dry mass were relatively insensitive to UV treatment; however, the proportion of non-viable bacteria (p = 0.006) and area-specific EPS content (p = 0.025) were significantly greater in the UVexposed treatment. These results suggest that ambient levels of UV can damage periphytic bacteria and may cause corresponding functional changes within naturally occurring periphytic communities.

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Section: Resultscontrasting

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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Effects of UV Radiation on Wetland Periphyton: Algae, Bacteria, and Extracellular Polysaccharides

Thomas¹,

Kuehn²,

Francoeur³

2009

Journal of Freshwater Ecology

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“…Most work on UVR in lakes has been focused on planktonic communities [75,76], but periphyton is also at risk to UVR, especially in oligotrophic systems. Although epipelic species may migrate downward into sediments during the daylight to avoid UVR exposure [77], Higley et al [78] reported that Anabaena circinalis, the dominant periphyton species in Castle Lake was sensitive to UVR, possibly because its nitrogen-fixing capacity was inhibited by UVR. The major indirect effect of UVR is via photolysis of DOM [79].…”

Section: Competition For Lightmentioning

confidence: 99%

Periphyton Function in Lake Ecosystems

Vadeboncoeur

Steinman

2002

The Scientific World JOURNAL

191

122

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Periphyton communities have received relatively little attention in lake ecosystems. However, evidence is increasing that they play a key role in primary productivity, nutrient cycling, and food web interactions. This review summarizes those findings and places them in a conceptual framework to evaluate the functional importance of periphyton in lakes. The role of periphyton is conceptualized based on a spatial hierarchy. At the coarsest scale, landscape properties such as lake morphometry, influence the amount of available habitat for periphyton growth. Watershed-related properties, such as loading of dissolved organic matter, nutrients, and sediments influence light availability and hence periphyton productivity. At the finer scale of within the lake, both habitat availability and habitat type affect periphyton growth and abundance. In addition, periphyton and phytoplankton compete for available resources at the within-lake scale. Our review indicates that periphyton plays an important functional role in lake nutrient cycles and food webs, especially under such conditions as relatively shallow depths, nutrient-poor conditions, or high water-column transparency. We recommend more studies assessing periphyton function across a spectrum of lake morphometry and trophic conditions.

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“…They are also the conduit through which primary production reaches larger predators such as fish, which often have commercial, recreational, and cultural importance for humans. In lakes at high elevations, the biomass of middle and upper trophic levels has been measured only rarely (McNaught et al., ), in contrast with more common measurements of lower trophic level biomass (Higley, Carrick, Brett, Luecke, & Goldman, ; Pugnetti & Bettinetti, ). The spatial distribution of that biomass within high‐elevation lakes has been measured even more rarely (Masson, Angeli, Guillard, & Pinel‐Alloul, ).…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in the biomass, distribution, and patchiness of zooplankton and fish in four lakes in the Sierra Nevada, California

Urmy

Warren

2019

Freshwater Biology

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Zooplankton are important components of lentic ecosystems, affecting phytoplankton, water clarity, and nutrient cycling, as well as transferring primary production to upper trophic levels. Many of these processes are temporally and spatially heterogeneous, but are difficult to observe at fine scales with traditional sampling methods. High‐resolution sampling has been especially rare in remote and high‐altitude lakes. We measured the vertical distribution of zooplankton and fish in four lakes in the Sierra Nevada Mountains of California, U.S.A. (Independence Lake, Lake Tahoe, Cherry Lake, and Lake Eleanor) using a dual‐frequency echosounder, and estimated lake‐wide biomass in all lakes except Tahoe. For zooplankton, we also quantified trends and patchiness in their horizontal distribution. In two of the lakes, Cherry and Eleanor, surveys were repeated four times at seasonal intervals between autumn 2013 and autumn 2014. Zooplankton were most abundant in these lakes in the spring and summer of 2014, with peak wet‐weight biomasses estimated at 31,000 kg in Lake Eleanor in April and 68,000 kg in Cherry Lake in June. The biomass and vertical distribution of fish also varied, increasing and moving shallower in the water column in June in both Cherry Lake and Lake Eleanor. Zooplankton density was not horizontally homogeneous, displaying gradients at the lake basin scale (5–6 km), and nested patchiness at a range of smaller scales (0–2 km). This small‐scale spatial variability may be generated biologically, not physically. While it is well‐known that the distribution of zooplankton is often patchy, this aspect of their ecology has not been quantified in most lakes, especially in remote montane locations. These results illustrate how acoustic sampling can rapidly and simultaneously measure the biomass and spatial distribution of multiple trophic levels in small lakes. This capability provides unique opportunities to study the processes that generate and maintain gradients and patchiness in these components of the ecosystem.

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The Effects of Ultraviolet Radiation and Nutrient Additions on Periphyton Biomass and Composition in a Sub-Alpine Lake (Castle Lake, USA)

Cited by 8 publications

References 24 publications

Effects of UV Radiation on Wetland Periphyton: Algae, Bacteria, and Extracellular Polysaccharides

Effects of UV Radiation on Wetland Periphyton: Algae, Bacteria, and Extracellular Polysaccharides

Periphyton Function in Lake Ecosystems

Seasonal changes in the biomass, distribution, and patchiness of zooplankton and fish in four lakes in the Sierra Nevada, California

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