搜索结果: 1-15 共查到“海洋生物学 in lakes”相关记录52条 . 查询时间(0.276 秒)
Production of dissolved organic matter by phytoplankton and its uptake by heterotrophic prokaryotes in large tropical lakes
Production of dissolved organic matter by phytoplankton heterotrophic prokaryotes large tropical lakes
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2014/7/10
In pelagic ecosystems, phytoplankton extracellular release can extensively subsidize the heterotrophic prokaryotic carbon demand. Time-course experiments were carried out to quantify primary productio...
Assessing nonpoint-source nitrogen loading and nitrogen fixation in lakes using δ15N and nutrient stoichiometry
Assessing nonpoint-source nitrogen loading nitrogen fixation lakes using δ15N nutrient stoichiometry
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2014/4/4
Runoff from human-dominated watersheds has greatly altered nitrogen (N) and phosphorus (P) cycling in lakes. Nutrients from human sources are distinct from those from undisturbed ecosystems in several...
The regional abundance and size distribution of lakes and reservoirs in the United States and implications for estimates of global lake extent
The regional abundance size distribution of lakes reservoirs in the United States implications for estimates global lake extent
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2014/4/4
We analyzed complete geospatial data for the 3.5 million lakes and reservoirs larger than 0.001 km2, with a combined surface area of 131,000 km2, in the contiguous United States (excluding the Laurent...
Phosphorus loading of mountain lakes: Terrestrial export and atmospheric deposition
Phosphorus loading mountain lakes Terrestrial export atmospheric deposition
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2014/4/8
We studied the atmospheric deposition of phosphorus (P) forms along an elevation gradient, and its contribution to the total external P loading of lakes in the Tatra Mountains and the Bohemian Forest,...
Does the Pareto distribution adequately describe the size-distribution of lakes?
size-distribution Pareto distribution
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2014/4/4
When it comes to evaluating lakes at regional and global scales, a key need is accurate estimates of the
abundance and size-distribution of lakes, which are usually described with the Pareto distribu...
Terrestrial organic matter and light penetration: Effects on bacterial and primary production in lakes
Terrestrial organic matter light penetration on bacterial primary production in lakes
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2014/4/17
We investigated productivity at the basal trophic level in 15 unproductive lakes in a gradient ranging from clear-water to brown-water (humic) lakes in northern Sweden. Primary production and bacteria...
Nitrogen fixation may not balance the nitrogen pool in lakes over timescales relevant to eutrophication management
Nitrogen fixation may not balance nitrogen pool in lakes over timescales relevant eutrophication management
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2014/4/17
We explored multiyear linear trends in nutrient concentrations, nitrogen (N) : phosphorus (P) ratio, and phytoplankton biomass within the 37-yr, whole-ecosystem nutrient enrichment experiment in Lake ...
Dreissenid mussels (Dreissena polymorphaandDreissena bugensis) reduce microzooplankton and macrozooplankton biomass in thermally stratified lakes
Dreissenid mussels reduce microzooplankton macrozooplankton biomass thermally stratified lakes
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2014/4/16
We conducted a survey of 50 thermally stratified lakes with similar nutrient concentrations and morphometries in Michigan to examine the direct and indirect effects of dreissenid mussels on the biomas...
Comparative estimate of P fluxes in lakes: A comment on ‘‘Fish decomposition in boreal lakes and biogeochemical implications’’ by Chidami and Amyot (2008)
Comparative estimate P fluxes in lakes Fish decomposition in boreal lakes biogeochemical implications Chidami Amyot
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2014/4/16
The contribution of fish and their relative importance in the nutrient dynamics of lakes (sink vs. source) continue to be a topic of debate (Mehner et al. 2007; Wurtsbaugh 2007; Sereda et al. 2008b). ...
No empirical evidence for community-wide top-down control of prey fish density and size by fish predators in lakes
No empirical evidence community-wide top-down control prey fish density size by fish predators in lakes
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2014/4/16
I tested relationships between fish predator and prey densities or size across 66 lakes of the European temperate zone, covering mean depths between 1 and 22 m and a phytoplankton biomass range betwee...
RIPPLE MARKS——THE STORY BEHIND THE STORY Collision Course: Climate Change, Bears, and Humans in the Land of 10,000 Lakes • Russian Roulette: To Catch a Fish-Owl • Polar Bears' Habitat—and Polar Bears—Shrinking • Rain-on-Snow: New Arctic Killer Fingered
Climate change wind water drought
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2015/7/6
Dust, winds, and waters. Bears and humans. All swirl together on this late summer afternoon in 2008 in Bear Head Lake State Park, Minnesota. A dry spell has turned dirt roads into arid trackways. Hint...
Regulation of spatial and temporal variability of carbon flux in six hard-water lakes of the northern Great Plains
Regulation of spatial temporal variability carbon flux six hard-water lakes northern Great Plains
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2014/4/17
Six hard-water lakes were sampled May-August for 14 yr in a 52,000 km2 catchment to identify the mechanisms that regulate the spatial and temporal variability of net atmospheric exchange of CO2 of lak...
Effect of Saharan dust inputs on bacterial activity and community composition in Mediterranean lakes and reservoirs
Effect of Saharan dust inputs bacterial activity community composition Mediterranean lakes and reservoirs
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2014/4/18
We assessed the effects of Saharan dust inputs of particulate matter (PM), total phosphorus (TP), total nitrogen, and water soluble organic carbon (WSOC) on bacterial abundance (BA) in two alpine lake...
Bacterial diversity and morphology in deep ultraoligotrophic Andean lakes: Role of UVR on vertical distribution
Bacterial diversity morphology
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2014/4/18
We investigated the community composition and the relative size–shape distribution of bacterial assemblages
in deep transparent lakes, where bacteria may be affected by harmful ultraviolet radiation ...
Living in transparent lakes: Low food P:C ratio decreases antioxidant response to ultraviolet radiation in Daphnia
Living in transparent lakes Low food P:C ratio decreases antioxidant response ultraviolet radiation in Daphnia
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2014/4/21
We experimentally tested the effect of food quality (phosphorus [P] : carbon [C] ratio) on the response of antioxidant enzymes to ultraviolet radiation (UVR) in Daphnia commutata fed with Chlamydomona...