scholarly journals Winter limnology: how do hydrodynamics and biogeochemistry shape ecosystems under ice?

2021 ◽  
Author(s):  
Joachim Jansen ◽  
Sally MacIntyre ◽  
David C. Barrett ◽  
Yu‐Ping Chin ◽  
Alicia Cortés ◽  
...  
Keyword(s):  
Winter Limnology

Field and Experimental Winter Limnology of Three Colorado Mountain Lakes

Ecology ◽  
1968 ◽  
Vol 49 (3) ◽  
pp. 505-520 ◽  
Author(s):  
Robert W. Pennak
Keyword(s):  
Mountain Lakes ◽  
Winter Limnology

Perspectives in winter limnology: closing the annual cycle of freezing lakes

2009 ◽  
Vol 43 (3) ◽  
pp. 609-616 ◽  
Author(s):  
K. Salonen ◽  
M. Leppäranta ◽  
M. Viljanen ◽  
R. D. Gulati
Keyword(s):  
Annual Cycle ◽  
Winter Limnology

scholarly journals Autumnal and Over-Winter Limnology of Three Small Eutrophic Lakes with Particular Reference to Experimental Circulation and Trout Mortality

1968 ◽  
Vol 25 (1) ◽  
pp. 81-99 ◽  
Author(s):  
T. G. Halsey
Keyword(s):  
Eutrophic Lake ◽  
Oxygen Depletion ◽  
Fish Population ◽  
Fish Mortality ◽  
Salmo Gairdneri ◽  
Winter Mortality ◽  
Eutrophic Lakes ◽  
Winter Limnology ◽  
High Concentrations ◽  
Richardsonius Balteatus

The autumnal and over-winter limnological characteristics of two small eutrophic lakes differed considerably from those of a third eutrophic lake; all were close to each other in the southwest interior of British Columbia. Thermal and chemical stratification was well defined in Marquette and Corbett lakes because local topography provided protection from wind action; stratification in the more exposed Courtney Lake was ill defined. Average wind velocities during summer and autumn on Courtney Lake were 4.3 times as great as, and more unidirectional than, those on Corbett Lake and probably Marquette. Complete natural autumnal oxygenation and circulation in Courtney Lake provided comparatively high concentrations of dissolved oxygen which permitted the over-winter survival of Salmo gairdneri and Richardsonius balteatus. Although Marquette and Corbett lakes were isothermal in late autumn, oxygen concentrations were well below saturation levels and circulation was probably incomplete. Consequently oxygen depletion during winter was severe and S. gairdneri and Salvelinus fontinalis were subject to over-winter mortality.Experimental circulation of Corbett Lake, just prior to ice cover, confirmed the hypothesis that incomplete autumnal oxygenation is a cause of "winter kill" of fishes. Artificial autumnal circulation of the lake provided an oxygen concentration sufficient to prevent overwinter fish mortality. However, over-winter mortality of the entire fish population did occur in the control lake, Marquette (incomplete autumnal oxygenation) but not in Courtney Lake (complete autumnal oxygenation).

scholarly journals Winter limnology: how do hydrodynamics and biogeochemistry shape ecosystems under ice?

2021 ◽  
Author(s):  
Joachim Jansen ◽  
Sally MacIntyre ◽  
David Barrett ◽  
Yu-Ping Chin ◽  
Alicia Cortés ◽  
...  
Keyword(s):  
Food Webs ◽  
Water Clarity ◽  
Functional Trait ◽  
Oxygen Depletion ◽  
State Transitions ◽  
Physical Processes ◽  
Knowledge Gaps ◽  
Mixing Depth ◽  
Interdisciplinary Approaches ◽  
Winter Limnology

<p>The ice-covered period in lakes is increasingly recognized for its unique hydrodynamic and biogeochemical phenomena and ecological relevance yet it remains poorly studied compared to the ice-free season. Knowledge gaps exist where research areas – hydrodynamics, biogeochemistry and biology – intersect. For example, density-driven circulation under ice coincides with an expansion of the anoxic zone, but abiotic and biotic controls on oxygen depletion have not been disentangled. While heterotrophic microorganisms and migrating phytoplankton often thrive at the oxycline, the extent to which physical processes induce fluxes of heat and substrates that further support under-ice food webs is uncertain. Similarly, radiatively-driven convection under ice in spring can promote growth of motile phytoplankton or diatoms depending on flow velocity, water clarity and mixing depth, but links between functional trait selection, trophic transfer to zooplankton and fish and the prevalence of microbial versus classical food webs in seasonally ice-covered lakes remain unclear. Under-ice processes cascade into and from the ice-free season, and are relevant to annual cycling of energy and carbon through aquatic food webs. Understanding the coupling between state transitions and the reorganization of trophic hierarchies is essential for predicting complex ecosystem responses to climate change. In this presentation, we briefly review existing knowledge regarding physical processes in lakes in winter and the parallel developments in under-ice biogeochemistry and ecology. We then illustrate interactions between these processes, identify extant knowledge gaps whose solution requires interdisciplinary approaches, and present (novel) methods to address outstanding questions.</p>

scholarly journals The unique methodological challenges of winter limnology

2018 ◽  
Author(s):  
Benjamin D. Block ◽  
Blaize A. Denfeld ◽  
Jason D. Stockwell ◽  
Giovanna Flaim ◽  
Hans‐Peter F. Grossart ◽  
...  
Keyword(s):  
Methodological Challenges ◽  
Winter Limnology

scholarly journals Winter Limnology as a New Frontier

2016 ◽  
Vol 25 (4) ◽  
pp. 103-108 ◽  
Author(s):  
Stephen M. Powers ◽  
Stephanie E. Hampton
Keyword(s):  
Winter Limnology ◽  
New Frontier

scholarly journals Life under ice in Lake Onego (Russia) – an interdisciplinary winter limnology study

Inland Waters ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 125-129 ◽  
Author(s):  
Alfred Wüest ◽  
Natacha Pasche ◽  
Bastiaan W. Ibelings ◽  
Sapna Sharma ◽  
Nikolay Filatov
Keyword(s):  
Winter Limnology

Winter limnology on the Great Lakes: The role of the U.S. Coast Guard

2011 ◽  
Vol 37 (1) ◽  
pp. 207-210 ◽  
Author(s):  
Robert Michael L. McKay ◽  
Benjamin F.N. Beall ◽  
George S. Bullerjahn ◽  
LCDR William C. Woityra
Keyword(s):  
Great Lakes ◽  
Coast Guard ◽  
Winter Limnology ◽  
The U.S

Influence of hydrological connectivity on winter limnology in floodplain lakes of the Saskatchewan River Delta, Saskatchewan

2016 ◽  
Vol 73 (1) ◽  
pp. 140-152 ◽  
Author(s):  
Brett D. MacKinnon ◽  
Jay Sagin ◽  
Helen M. Baulch ◽  
Karl-Erich Lindenschmidt ◽  
Timothy D. Jardine
Keyword(s):  
Remote Sensing ◽  
Water Chemistry ◽  
River Flow ◽  
Floodplain Lakes ◽  
River Delta ◽  
Hydrological Connectivity ◽  
Supporting Evidence ◽  
Optical Remote Sensing ◽  
Coverage Area ◽  
Winter Limnology

Globally, hydrological connectivity between rivers and their floodplains has been reduced by river flow management and land transformation. The Saskatchewan River Delta is North America’s largest inland delta and a hub for fish and fur production. To determine the influence of connectivity on limnology within this northern floodplain, water chemistry and stable isotopes (δ18O and δ2H) were analyzed during the winter of 2014 in 26 shallow lakes along a hydrological gradient. A total of five lake connectivity categories were determined by optical remote sensing imagary of surface water coverage area from years of varying flood intensities. Accuracy of categories was verified by degree of 18O and 2H enrichment within lakes. Both isotopes showed marked successional enrichment between connectivity categories, with more isolated lakes exhibiting greater enrichment. Water chemistry in lakes with greater connectivity to the main channel were characterized by higher pH, dissolved oxygen, nitrates, and sulfates and lower total nitrogen, total phosphorus, and ammonium compared with more isolated lakes. These findings illustrate how connectivity influences water chemistry in northern floodplain lakes and how it might determine the suitability of these lakes as winter refuge for fishes. Additionally, our study provides supporting evidence for the effective use of optical remote sensing imagery, an inexpensive and accessible source of data for researchers, when determining connectivity characteristics of large northern floodplain systems. Additionally, this study provides further evidence that the inundation of floodplain lakes by river water during peak discharge has an impact on the conditions within the lakes long into the winter ice-cover season. Understanding the year-round influence of river–floodplain connection is imperative for assessing potential impacts of climate change and future water regulation on such ecosystems.

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