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Title of Journal: Ecosystems

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Abbravation: Ecosystems

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Springer-Verlag

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DOI

10.1002/9781119245025.ch22

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1435-0629

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Scaling of Pelagic Metabolism to Size Trophy and

Authors: Kaj SandJensen Peter A Staehr
Publish Date: 2007/02/13
Volume: 10, Issue: 1, Pages: 128-142
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Abstract

We tested whether pelagic light and nutrient availability metabolism organic pools and CO2supersaturation were related to lake size and surrounding forest cover in late summer–autumn measurements among 64 small 002–20 ha shallow seepage lakes located in nutrientrich calcareous moraine soils in North Zealand Denmark We found a strong implicit scaling to lake size as light availability increased significantly with lake size while nutrient availability phytoplankton biomass and dissolved organic matter declined Forest lakes had significantly stronger net heterotrophic traits than open lakes as higher values were observed for light attenuation above and in the water dissolved organic matter pelagic community respiration R relative to maximum gross primary production R/GPP and CO2supersaturation Totalphosphorus was the main predictor of phytoplankton biomass Chl despite a much weaker relationship than observed in previous studies of larger lakes Maximum gross primary production increased with algal biomass and decreased with dissolved organic matter whereas community respiration increased with dissolved organic matter and particularly with gross primary production These results suggest that exogenous organic matter supplements primary production as an energy source to heterotrophs in these small lakes and particularly so in forest lakes experiencing substantial shading from the forest and dissolved humic material This suggestion is supported by 20–30fold CO2 supersaturation in the surface water of the smallest forest lakes and more than sixfold supersaturation in 75 of all measurements making these lakes among the most supersaturated temperate lakes examined so far

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  2. Spatially Explicit Modeling in Ecology: A Review
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  5. Social Perceptions of Rainforest and Climatic Change from Rural Communities in Southern Mexico
  6. Land cover in single-family housing areas and how it correlates with urban form
  7. Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13 C Abundance, Solid-State 13 C NMR Spectroscopy and the Meaning of “Lignin”
  8. A comparison of the growth and cooling effectiveness of five commonly planted urban tree species
  9. Tree Harvest in an Experimental Sand Ecosystem: Plant Effects on Nutrient Dynamics and Solute Generation
  10. Using macroinvertebrate assemblages and multiple stressors to infer urban stream system condition: a case study in the central US
  11. Numerical Exploration of the Planktonic to Benthic Primary Production Ratios in Lakes of the Baltic Sea Catchment
  12. Decomposition of labile and recalcitrant litter types under different plant communities in urban soils
  13. Factors explaining the occurrence of the Siberian flying squirrel in urban forest landscape
  14. Amending soil with used cooking oil to reduce nitrogen losses after cole crop harvest: a 15 N study
  15. Effects of fertiliser type and the presence or absence of plants on nitrous oxide emissions from irrigated soils
  16. Relative contribution of trees and crops to soil carbon content in a parkland system in Burkina Faso using variations in natural 13 C abundance
  17. Shrubs affect soil nutrients availability with contrasting consequences for pasture understory and tree overstory production and nutrient status in Mediterranean grazed open woodlands
  18. Difficulties with estimating city-wide urban forest cover change from national, remotely-sensed tree canopy maps
  19. Forecasting long-term global fertilizer demand
  20. 15 N tracer technique analysis of the absorption and utilisation of nitrogen fertiliser by potatoes
  21. Response of Net Ecosystem Productivity of Three Boreal Forest Stands to Drought
  22. Nitrogen, phosphorus, and potassium budgets in Indian agriculture
  23. Basin-Scale Consequences of Agricultural Land Use on Benthic Light Availability and Primary Production Along a Sixth-Order Temperate River
  24. Linking Forest Fire Regimes and Climate—A Historical Analysis in a Dry Inner Alpine Valley
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  26. Chronic Atmospheric NO 3 − Deposition Does Not Induce NO 3 − Use by Acer saccharum Marsh.
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  28. Watershed Effects on Chemical Properties of Sediment and Primary Consumption in Estuarine Tidal Flats: Importance of Watershed Size and Food Selectivity by Macrobenthos
  29. Pine Forest Floor Carbon Accumulation in Response to N and PK Additions: Bomb 14 C Modelling and Respiration Studies
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  34. Subsidies of Aquatic Resources in Terrestrial Ecosystems
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