Limnology and Oceanography

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THE CYCLE OF PHOSPHORUS IN A PLANKTON BLOOM IN THE GULF OF MAINE1
Limnology and Oceanography - Tập 10 Số suppl - 1965
Bostwick H. Ketchum, Nathaniel Corwin
The cycle of phosphorus was studied in detail during the spring bloom of phytoplankton in the Gulf of Maine in April 1964. A parachute drogue was placed at a depth of 10 m so that the movement of the surface water could be Followed. Five stations were occupied (luring an interval of 24 hr on 8–9 April when the drogue was launched and another five stations at the location of the drogue were...... hiện toàn bộ
Lakes and reservoirs as sentinels, integrators, and regulators of climate change
Limnology and Oceanography - Tập 54 Số 6part2 - Trang 2273-2282 - 2009
Craig E. Williamson, Jasmine E. Saros, Warwick F. Vincent, John P. Smol
Climate change is generating complex responses in both natural and human ecosystems that vary in their geographic distribution, magnitude, and timing across the global landscape. One of the major issues that scientists and policy makers now confront is how to assess such massive changes over multiple scales of space and time. Lakes and reservoirs comprise a geographically distributed netwo...... hiện toàn bộ
Optical absorption and fluorescence properties of chromophoric dissolved organic matter in natural waters
Limnology and Oceanography - Tập 39 Số 8 - Trang 1903-1916 - 1994
Sarah Green, Neil V. Blough
Complete optical absorption and fluorescence spectra were collected for a diverse suite of 0.2‐µm‐filtered marine, riverine, and estuarine waters, as well as for colored dissolved organic matter (CDOM) isolated from several of these waters by solid‐phase C18 extraction. Absorption and fluorescence parameters for these samples arc reported. Fo...... hiện toàn bộ
The optics of chromophoric dissolved organic matter (CDOM) in the Greenland Sea: An algorithm for differentiation between marine and terrestrially derived organic matter
Limnology and Oceanography - Tập 46 Số 8 - Trang 2087-2093 - 2001
Colin A. Stedmon, Stiig Markager
The optics of chromophoric dissolved organic matter (CDOM) in the Greenland Sea were investigated and compared to results from earlier studies in the Southeastern North Sea. Absorption at 375 nm (a375) in the Greenland Sea varied from 0.77 m−1 to the detection limit of our instrument (0.05 m−1), with the highest values found du...... hiện toàn bộ
The influence of water motion on the distribution and transport of materials in a salt marsh estuary1
Limnology and Oceanography - Tập 28 Số 2 - Trang 201-214 - 1983
J. Imberger, T. Berman, R. R. Christian, Evelyn B. Sherr, David E. Whitney, L. R. Pomeroy, Richard G. Wiegert, W. J. Wiebe
A formal approach is presented of ordering the time scales of the dominant fluxes of material in an estuary and then accordingly choosing the spatial and temporal resolution of the sampling program. In this way bounds can be derived for the internal turnover times, boundary exchange rates, and import or export fluxes of a particular substance purely from measurements of the standing stock ...... hiện toàn bộ
Predicting diel vertical migration of zooplankton
Limnology and Oceanography - Tập 35 Số 5 - Trang 1195-1200 - 1990
Stanley I. Dodson
Amplitude of diel vertical migration is predicted by water clarity measured by Secchi depth. The model assumes that vertical migration serves to minimize mortality from visually feeding fish and to maximize grazing rate within this predation context. Three of the 24 observations of diel vertical migration are outliers which are either ultraoligotrophic, or have minimal populations of plank...... hiện toàn bộ
Zooplanktivorous fish and variable diel vertical migration in the marine planktonic copepod Calanus pacificus
Limnology and Oceanography - Tập 34 Số 6 - Trang 1072-1083 - 1989
Stephen M. Bollens, Bruce W. Frost
As a field test of the hypothesis that variable diel vertical migration in zooplankton is a response to variations in the abundance of visually orienting predators, we sampled juvenile and adult planktivorous fish inhabiting a temperate fjord (Dabob Bay, Washington) concurrently with the vertical distributions of a population of adult female Calanus pacificus (Co...... hiện toàn bộ
Multiple stressors on coral reefs: A long ‐term perspective
Limnology and Oceanography - Tập 44 Số 3part2 - Trang 932-940 - 1999
Terence P. Hughes, Joseph H. Connell
Coral reefs are subject to a high frequency of recurrent biological and physical disturbances. The temporal and spatial scales of these are often large and difficult to study, so that most of our knowledge of disturbances on coral reefs comes from investigations conducted at one or a few sites, over short periods of time. We argue that studying single events in isolation can be misleading ...... hiện toàn bộ
A nitrate sink in estuaries? An assessment by means of stable nitrate isotopes in the Elbe estuary
Limnology and Oceanography - Tập 53 Số 4 - Trang 1504-1511 - 2008
Kirstin Dähnke, Enno Bahlmann, Kay‐Christian Emeis
To elucidate the fate of river‐borne nitrate in the estuarine environment, we measured nitrate concentrations and Δ15N and Δ18O of nitrate along the salinity gradient in the estuary of the river Elbe, one of the largest German rivers discharging into the North Sea. Nitrate concentrations in river waters ranged from 78 µmol L‐1 ...... hiện toàn bộ
GROWTH ESTIMATES FROM RIBONUCLEIC ACID CONTENT IN SOME SMALL ORGANISMS1
Limnology and Oceanography - Tập 10 Số suppl - 1965
W. H. Sutcliffe
RNA concentrations were determined on whole amphipods (Orchestia platensis) of different sizes and a relationship between RNA and dry weight established by least squares. The smallest (and fastest growing) individuals had ten times the RNA concentration of the largest. Growth rate in the amphipods was estimated by length‐frequencies in a time series and then rela...... hiện toàn bộ
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