Sources and sinks of nitrogen and phosphorus to a deep, oligotrophic lake, Lake Crescent, Olympic National Park, Washington

Moran, Patrick; Cox, Stephen E.; Embrey, S.S.; Huffman, Raegan L.; Olsen, Theresa D.; Fradkin, Steven C.

doi:10.3133/sir20125107

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…For example, melting permafrost in Lake Baikal's watershed (Anisimov and Reneva 2006) and the Selenga River basin (Tornqvist et al 2014) as well as climate‐driven changes in mixing processes (Swann et al 2020) have the potential to contribute substantial nutrient loadings to the nearshore. While nutrients also could be contributed by agriculture (Powers et al 2016) and changing terrestrial plant communities (Moran et al 2012), these are not currently known to be major sources of elevated nutrients in the Baikal watershed, relative to sewage (Timoshkin et al 2016, 2018), changing mixing patterns (Swann et al 2020), forest fires (Kulikova et al 2020), and permafrost melt (Anisimov and Reneva 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Nitrogen and phosphorus are among the primary pollutants in wastewater and its associated byproducts, yet these nutrients can also originate from disparate anthropogenic and natural environmental sources, thereby complicating their use as sewage indicators. For example, agriculture (Powers et al 2016), watershed processes such as melting permafrost (Tornqvist et al 2014), and changes in terrestrial plant communities (Moran et al 2012) can all increase allochthonous nutrient inputs similar to sewage. Regardless of the nutrients' source, biological processes can further confound sewage detection.…”

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confidence: 99%

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Effects of spatially heterogeneous lakeside development on nearshore biotic communities in a large, deep, oligotrophic lake

Meyer

Ozersky

Woo

et al. 2022

Limnology & Oceanography

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Sewage released from lakeside development can reshape ecological communities. Nearshore periphyton can rapidly assimilate sewage-associated nutrients, leading to increases of filamentous algal abundance, thus altering both food abundance and quality for grazers. In Lake Baikal, a large, ultra-oligotrophic, remote lake in Siberia, filamentous algal abundance has increased near lakeside developments, and localized sewage input is the suspected cause. These shifts are of particular interest in Lake Baikal, where endemic littoral biodiversity is high, lakeside settlements are mostly small, tourism is relatively high ($1.2 million visitors annually), and settlements are separated by large tracts of undisturbed shoreline, enabling investigation of heterogeneity and gradients of disturbance. We surveyed sites along 40 km of Baikal's southwestern shore for sewage indicators-pharmaceuticals and personal care products (PPCPs) and microplastics-as well as periphyton and macroinvertebrate abundance and indicators of food web structure (stable isotopes and fatty acids). Summed PPCP concentrations were spatially related to lakeside development. As predicted, lakeside development was associated with more filamentous algae and lower abundance of sewage-sensitive mollusks. Periphyton and macroinvertebrate stable isotopes and essential fatty acids suggested that food web structure otherwise remained similar across sites; yet, the invariance of amphipod fatty acid composition, relative to periphyton, suggested that grazers adjust behavior or metabolism to compensate for different periphyton assemblages. Our results demonstrate that even low levels of human disturbance can result in spatial heterogeneity of nearshore ecological responses, with potential for changing trophic interactions that propagate through the food web.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Effects of spatially heterogeneous lakeside development on nearshore biotic communities in a large, deep, oligotrophic lake

Meyer

Ozersky

Woo

et al. 2022

Limnology & Oceanography

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“…Regardless of the specific methodology, these techniques can be used to compare periphyton communities' richness, evenness, or taxonomic and functional dissimilarity to communities at various spatial locations or points in time. These data can also be useful for inferring periphyton responses to various disturbances, such as wastewater inputs (Rosenberger et al 2008) and changing terrestrial plant communities (Moran et al 2013). Here, we detail each of these methods as well as the associated benefits, assumptions, and tradeoffs; a summary of these methods is available in Table 2.…”

Section: Periphyton Community Composition Analysismentioning

confidence: 99%

Integrating periphyton and surfacewater–groundwatermethods to understand lake ecosystem processes

Atkins

Shannon

Meyer

et al. 2021

Limnology & Ocean Methods

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Groundwater-surface water (GW-SW) interactions represent an important, but less visible, linkage in lake ecosystems. Periphyton is most abundant at the GW-SW interface and can rapidly assimilate nutrients from the water column. Despite the importance of periphyton in regulating whole-lake metabolism, they are less well studied or monitored in comparison with planktonic taxa and pelagic systems. This is in stark contrast to studies of flowing waters and wetlands, where variability in GW-SW connectivity and periphyton productivity is more often incorporated into study designs. To bridge the gap between groundwater's influence on lake benthic communities, this synthesis aims to prime researchers with information necessary to incorporate groundwater and periphyton sampling into lake studies and equip investigators with tools that will facilitate crossdisciplinary collaboration. Specifically, we (1) propose how to overcome barriers associated with studying littoral ecological-hydrological dynamics; (2) summarize field, laboratory, and modeling techniques for assessing spatiotemporal periphyton patterns and benthic hydrological fluxes; and (3) identify paths for hydrological techniques to be incorporated into ecological studies, deepening our understanding of whole-lake ecosystem function. We argue that coupling hydrological and periphyton measurements can yield dualistic insights into lake ecosystem functioning: how benthic periphyton modulate constituents within groundwater, and conversely, the extent to which constituents in groundwater modulate the productivity of periphyton assemblages. We assert that priming ecologists and hydrologists alike with a shared understanding of how each discipline studies the nearshore zone presents a tangible path forward for both integrating these disciplines and further contextualizing lake processes within the limnological landscape.

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Riparian Soil Development Linked to Forest Succession Above and Below Dams Along the Elwha River, Washington, USA

2016

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Sources and sinks of nitrogen and phosphorus to a deep, oligotrophic lake, Lake Crescent, Olympic National Park, Washington

Cited by 5 publications

References 20 publications

Effects of spatially heterogeneous lakeside development on nearshore biotic communities in a large, deep, oligotrophic lake

Effects of spatially heterogeneous lakeside development on nearshore biotic communities in a large, deep, oligotrophic lake

Integrating periphyton and surfacewater–groundwatermethods to understand lake ecosystem processes

Riparian Soil Development Linked to Forest Succession Above and Below Dams Along the Elwha River, Washington, USA

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