Long-term primary production trends in the Laurentian Great Lakes: a comparison of geochemical methods

Agriculture & Biology

• Great Lakes 95%
• primary productivity 88%
• sediments 69%
• chemical species 44%
• Lake Superior 37%
• lakes 30%
• carbon isotopes 29%
• eutrophication 29%
• nitrogen 29%
• carbonates 28%
• Cyanobacteria 22%
• methodology 20%
• weight-of-evidence 19%
• chlorophyll 18%
• Lake Erie 17%
• Lake Ontario 17%
• human settlements 17%
• carbon 16%
• total organic carbon 15%
• organic nitrogen 15%
• human population 13%
• isotopes 12%
• water quality 12%
• basins 11%
• summer 8%

Earth & Environmental Sciences

• primary production 69%
• lake 43%
• indicator 38%
• trend 37%
• comparison 31%
• catchment 28%
• carbonate sediment 22%
• productivity 19%
• cyanobacterium 17%
• eutrophication 16%
• chlorophyll a 16%
• nitrogen 16%
• carbon 15%
• watershed 13%
• sediment 13%
• nitrogen isotope 10%
• human settlement 10%
• organic nitrogen 10%
• lake basin 9%
• accumulation rate 9%
• human population 9%
• sediment core 8%
• carbon isotope 8%
• total organic carbon 8%
• algal bloom 8%
• isotope 6%
• erosion 6%
• water quality 6%
• summer 5%
• history 5%
• loss 4%
• product 4%