Lake productivity also influences δ 13 C patterns, as France et al. About 280 000 cu.km of water exists on earth in the form of lakes. Relative lake level fluctuations and their influence on productivity and resilience in tropical lakes and reservoirs. Land vs. lake productivity. relative to the atmosphere. The thermal structure of lakes helps determine productivity and nutrient cycling. Fig. The index also has a strong log-linear relationship with the fish productivity. ... continuum of productivity. ... (the relative depth of t he lake has a . A broader definition of lake productivity, that is, incorporating factors operating outside of water column (e.g., riparian meadows and mudflats), would result in a closer relationship and higher model performance. Lake surface area relative to upstream catchment size and lake perimeter‐to‐surface‐area ratio were also important, with smaller upstream catchments yielding higher production, and high shoreline complexity correlated with lower productivity as measured by limnetic PR. Is it good or bad when, e.g., land gets flooded to create a reservoir? This production is important because some of it is used for food and some is valued for recreation, it is a direct measure of total ecosystem processes, and it … 7.12. Lake thermal structure is determined by several factors. 163 ecological monographs, 71(2), 2001, pp. Biological production represents the total amount of living material (biomass) that was produced during a defined period of time. Jeppe Kolding, Paul A.M. van Zwieten, Relative lake level fluctuations and their influence on productivity and resilience in tropical lakes and reservoirs, Fisheries Research, 10.1016/j.fishres.2011.11.008, 115-116, (99-109), (2012). Fish production in these lakes is generally high, e.g. But as the annual relative yield from the highly diverse flood-regulation, then both external and internal impacts of and variable African lakes practically is constant around three ton changed or regulated water level dynamics on the aquatic biology per fisher per year (Fig. 163–186 q 2001 by the ecological society of america trophic cascades, nutrients, and lake productivity: whole-lake experiments stephen r. carpenter,1,6 jonathan j. cole,2 james r. hodgson,3 james f. k itchell,1 michael l. pace,2 darren bade,1 kathryn l. cottingham,4 timothy e. essington,1 jeffrey n. houser,1 and daniel e. schindler5 Lake Kyoga (389 kg ha-1, Lake George 156 kg ha-1 and Lake Mweru Wantipa 100 kg ha-1). Do lakes have lower or higher primary and secondary productivity per unit area compared with land? 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