Effects of permafrost degradation on water and sediment quality and heterotrophic bacterial production of Arctic tundra lakes: An experimental approach

To assess the effects of shoreline retrogressive thaw slumping on the chemical, physical, and ecological components of small tundra lakes, an in situ manipulative mesocosm experiment was performed in an upland, unslumped Arctic lake located near Inuvik, Northwest Territories, Canada. Twelve replicate mesocosms were established: three control and three replicates of three treatment levels each dosed with differing amounts of soil sourced from the thaw scar of a nearby lake affected by shoreline retrogressive thaw slumping. The soil was rich in ionic compounds such as calcium, magnesium, and sulfates reflecting the marine origin of the local geology, and also contained nutrients (P and N) and organic carbon. Water column ionic and nutrient concentrations increased with increasing soil input, while pelagic bacterial production decreased. Conversely, benthic bacterial production increased by 44, 112, and 498% in the low, medium, and high soil treatments, respectively. This study shows thermokarst slumping to differentially affect pelagic and benthic heterotrophic microbial production through changes to the physical and chemical properties of the water and sediment. The stimulation of benthic and corresponding inhibition of pelagic heterotrophic productivity relative to the control treatments over the 12‐week experimental period indicate that shoreline retrogressive thaw slumping alters heterotrophic energy pathways during the early successional stages of thermokarst lakes experiencing shoreline slumping.

[1]  Michael J. Crawley,et al.  The R book , 2022 .

[2]  Arctic Monitoring and Assessment Programme.  Snow, Water, Ice, and Permafrost in the Arctic; Summary for Policymakers, 2017 , 2017 .

[3]  T. Prowse,et al.  Responses of Benthic Invertebrate Communities to Shoreline Retrogressive Thaw Slumps in Arctic Upland Lakes , 2014, Freshwater Science.

[4]  Amap.  AMAP Assessment 2013: Arctic Ocean Acidification. Arctic Monitoring and Assessment Programme (AMAP) , 2013 .

[5]  Ian D. Clark,et al.  Thawing of massive ground ice in mega slumps drives increases in stream sediment and solute flux across a range of watershed scales , 2013 .

[6]  T. Prowse,et al.  Shifts in Plankton, Nutrient and Light Relationships in Small Tundra Lakes Caused by Localized Permafrost Thaw , 2012 .

[7]  M. Sharp,et al.  Ecological Implications of Changes in the Arctic Cryosphere , 2011, AMBIO.

[8]  M. Koschorreck,et al.  Influence of bioturbation on the biogeochemistry of littoral sediments of an acidic post-mining pit lake , 2011 .

[9]  T. Prowse,et al.  Effects of retrogressive permafrost thaw slumping on sediment chemistry and submerged macrophytes in Arctic tundra lakes , 2010 .

[10]  P. Ask,et al.  Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes , 2009 .

[11]  Neil Pakenham-Walsh.  Dying for knowledge , 2009, Canadian Medical Association Journal.

[12]  I. Stirling,et al.  Ecological Dynamics Across the Arctic Associated with Recent Climate Change , 2009, Science.

[13]  C. Osburn,et al.  Phytoplankton productivity across prairie saline lakes of the Great Plains (USA): a step toward deciphering patterns through lake classification models , 2009 .

[14]  Per Ask,et al.  Light limitation of nutrient-poor lake ecosystems , 2009, Nature.

[15]  P. Ask,et al.  Whole-lake estimates of carbon flux through algae and bacteria in benthic and pelagic habitats of clear-water lakes. , 2009, Ecology.

[16]  S. Kokelj,et al.  The impacts of thawing permafrost on the chemistry of lakes across the subarctic boreal‐tundra transition, Mackenzie Delta region, Canada , 2009 .

[17]  Steven V. Kokelj,et al.  The environment and permafrost of the Mackenzie Delta area , 2009 .

[18]  V. Mitev,et al.  Unprecedented evidence for deep convection hydrating the tropical stratosphere , 2008 .

[19]  Trevor C. Lantz,et al.  Increasing rates of retrogressive thaw slump activity in the Mackenzie Delta region, N.W.T., Canada , 2008 .

[20]  J. Downing,et al.  Plumbing the Global Carbon Cycle: Integrating Inland Waters into the Terrestrial Carbon Budget , 2007, Ecosystems.

[21]  W. Vincent,et al.  Isotopic analysis of the sources of organic carbon for zooplankton in shallow subarctic and arctic waters , 2007 .

[22]  Frederick J. Wrona,et al.  Climate Change Effects on Aquatic Biota, Ecosystem Structure and Function , 2006, Ambio.

[23]  W. Vincent,et al.  Benthic and pelagic food resources for zooplankton in shallow high‐latitude lakes and ponds , 2006 .

[24]  Steven V. Kokelj,et al.  The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada , 2005 .

[25]  C. Burn,et al.  Ground ice and soluble cations in near‐surface permafrost, Inuvik, Northwest Territories, Canada , 2003 .

[26]  C. Burn,et al.  Tundra lakes and permafrost, Richards Island, western Arctic coast, Canada , 2002 .

[27]  Ralph Smith,et al.  Limnology—Inland water ecosystems , 2002, Journal of the North American Benthological Society.

[28]  E. Tipping,et al.  Cation binding by humic substances: Cation–humic binding and other physico-chemical processes , 2002 .

[29]  M. Jansson,et al.  Bacterioplankton Production in Lakes along an Altitude Gradient in the Subarctic North of Sweden , 2001, Microbial Ecology.

[30]  Vincent J. Carey,et al.  Mixed-Effects Models in S and S-Plus , 2001 .

[31]  M. Jansson,et al.  Allochthonous organic carbon and phytoplankton/bacterioplankton production relationships in lakes , 2000 .

[32]  A. Hershey,et al.  Impact of global change on the biogeochemistry and ecology of an Arctic freshwater system , 1999 .

[33]  John P. Smol,et al.  Physical and chemical limnology of 59 lakes located between the southern Yukon and the Tuktoyaktuk Peninsula, Northwest Territories (Canada) , 1997 .

[34]  Peter Blomqvist,et al.  Nutrient limitation of bacterioplankton, autotrophic and mixotrophic phytoplankton, and heterotrophic nanoflagellates in Lake Örträsket , 1996 .

[35]  W. Traunspurger,et al.  Vertical distribution of benthic nematodes in an oligotrophic lake: seasonality, species and age segregation , 1996, Hydrobiologia.

[36]  R. Robarts,et al.  Microbial nutrient limitation in prairie saline lakes with high sulfate concentration , 1995 .

[37]  L. Arvola,et al.  Effects of different molecular weight fractions of dissolved organic matter on the growth of bacteria, algae and protozoa from a highly humic lake , 1992, Hydrobiologia.

[38]  Michael L. Pace,et al.  The production of dissolved organic matter by phytoplankton and its importance to bacteria : patterns across marine and freshwater systems , 1991 .

[39]  Lyse Godbout,et al.  The humic content of lake water and its relationship to watershed and lake morphometry , 1989 .

[40]  C. Forsberg.  Importance of sediments in understanding nutrient cyclings in lakes , 1989, Hydrobiologia.

[41]  A. Lewkowicz,et al.  Headwall retreat of ground-ice slumps, Banks Island, Northwest Territories , 1987 .

[42]  M. Small,et al.  A regional pH-alkalinity relationship , 1986 .

[43]  G. Lopez,et al.  Bacterial abundance in relation to surface area and organic content of marine sediments , 1985 .

[44]  V. Barnett,et al.  Applied Linear Statistical Models , 1975 .

[45]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[46]  T. Stocker.  Climate change 2013 : the physical science basis : Working Group I contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change , 2013 .

[47]  Corinne Le Quéré,et al.  Climate Change 2013. The Physical Science Basis. Working Group I Contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change - Abstract for decision-makers , 2013 .

[48]  C. Duguay,et al.  Changing lake and river ice regimes: trends, effects and implications , 2011 .

[49]  M. Thompson.  The impact of permafrost degradation on the pelagic water chemistry and biota of small tundra lakes , 2009 .

[50]  M. S. Thompson,et al.  The Impact of Sediments Derived from Thawing Permafrost on Tundra Lake Water Chemistry: An Experimental Approach , 2009 .

[51]  P. Mesquita.  Effects of retrogressive permafrost thaw slumping on benthic macrophyte and invertebrate communities of upland tundra lakes , 2008 .

[52]  G. Fryer.  Variation in acid tolerance of certain freshwater crustaceans in different natural waters , 2004, Hydrobiologia.

[53]  Roger I. Jones,et al.  The influence of humic substances on lacustrine planktonic food chains , 2004, Hydrobiologia.

[54]  Arctic Monitoring,et al.  Impacts of a warming Arctic : Arctic Climate Impact Assessment , 2004 .

[55]  D. Lodge,et al.  Putting the Lake Back Together: Reintegrating Benthic Pathways into Lake Food Web Models , 2002 .

[56]  André F. Lotter,et al.  Loss on ignition as a method for estimating organic and carbonate content in sediments: reproducibility and comparability of results , 2001 .

[57]  Haseen Khan,et al.  Canadian Water Quality Guidelines for the Protection of Aquatic Life CCME WATER QUALITY INDEX 1.0 Technical Report , 2001 .

[58]  F. Triska,et al.  Nitrogen biogeochemistry and surface-subsurface exchange in streams , 2000 .

[59]  F. Azam,et al.  Protein content and protein synthesis rates of planktonic marine bacteria , 1989 .

[60]  M. Pace,et al.  Bacterial production in fresh and saltwater ecosystems: a cross-system overview , 1988 .

[61]  D. G. Frey,et al.  Textbook of Limnology , 1975 .

[62]  G. Cole,et al.  Notes on the vertical distribution of organisms in the profundal sediments of Douglas Lake, Michigan , 1953 .