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Closed Access item Paleolimnological evidence of the effects on lakes of energy and mass transfer from climate and humans
|Authors:||Leavitt, P. R.|
Fritz, S. C.
Anderson, N. J.
Baker, P. A.
Conley, Daniel J.
Hobbs, W. O.
Rusak, J. A.
Simpson, G. L.
|Publisher:||American Society of Limnology and Oceanography|
|Citation:||Limnology and Oceanography 54(6, part 2) : 2330–2348 (2009)|
|Abstract:||The premise of this article is that climate effects on lakes can be quantified most effectively by the integration of
process-oriented limnological studies with paleolimnological research, particularly when both disciplines operate
within a common conceptual framework. To this end, the energy (E)–mass (m) flux framework (Em flux) is
developed and applied to selected retrospective studies to demonstrate that climate variability regulates lake
structure and function over diverse temporal and spatial scales through four main pathways: rapid direct transfer
of E to the lake surface by irradiance, heat, and wind; slow indirect effects of E via changes in terrestrial
development and subsequent m subsidies to lakes; direct influx of m as precipitation, particles, and solutes from
the atmosphere; and indirect influx of water, suspended particles, and dissolved substances from the catchment.
Sedimentary analyses are used to illustrate the unique effects of each pathway on lakes but suggest that
interactions among mechanisms are complex and depend on the landscape position of lakes, catchment
characteristics, the range of temporal variation of individual pathways, ontogenetic changes in lake basins, and
the selective effects of humans on m transfers. In particular, preliminary synthesis suggests that m influx can
overwhelm the direct effects of E transfer to lakes, especially when anthropogenic activities alter m subsidies from
|Description:||19 páginas, 10 figuras, 1 tabla.|
|Publisher version (URL):||http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1121&context=geosciencefacpub|
|Appears in Collections:||(CEAB) Artículos|
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