21 Result(s)
within
L. Cruz-Pizarro
English
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Article
Sedimentary Phosphate Fractions Related to Calcite Precipitation in an Eutrophic Hardwater Lake (Lake Alserio, Northern Italy)
P-fractional composition has been studied in a 64-cm long sediment core collected in an eutrophic hardwater lake (Lake Alserio, northern Italy) in an attempt to identify the main mechanisms (chemical or biolog...
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Article
Sediment phosphate fractionation and interstitial water phosphate concentration in two coastal lagoons (Albuferas de Adra, SE Spain)
The concentrations of o-phosphate and dissolved inorganic carbon were monitored in the interstitial water of the sediment in two highly eutrophic coastal lagoons, Laguna Honda and Laguna Nueva (SE, Spain) from...
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Article
Identification and biochemical characterization ofStreptomyces galbus from the sediment of the high-mountain lake La Caldera (Sierra Nevada, Spain)
Thirteen bacterial strains isolated from the shoreline sediments of the high-mountain lake La Caldera (Sierra Nevada, Spain; altitude 3040 m) were characterized morphologically and by their biochemical paramet...
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Article
Diel variation in the egg ratio of Hexarthra bulgarica in the high mountain lake La Caldera (Spain)
Hexarthra bulgarica is the dominant rotifer species in the lake La Caldera (south of Spain) both in number of individuals and in biomass. This species shows a nocturnal vertical migration and a simultaneous di...
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Chapter and Conference Paper
Diel variation in the egg ratio of Hexarthra bulgarica in the high mountain lake La Caldera (Spain)
Hexarthra bulgarica is the dominant rotifer species in the lake La Caldera (south of Spain) both in number of individuals and in biomass. This species shows a nocturnal vertical migration and a s...
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Article
Remote mountain lakes as indicators of diffuse acidic and organic pollution in the Iberian peninsula (AL:PE 2 studies)
In the framework of the AL:PE 2 project, studies on acidification and organic pollution in mountain lakes have been conducted in several ranges in the Iberian peninsula: Pyrenees (Northeastern Spain), Sierra d...
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Article
Effects of fluctuating temperatures on the population dynamics of Hexarthra bulgarica (Wiszniewski) from high mountain lakes in Sierra Nevada (Spain)
We examine the development of Hexarthra bulgarica (Wisniewski) populations in relation to thermal stability in natural environments. A high frequency sampling program was developed simultaneously in two high moun...
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Chapter and Conference Paper
Effects of fluctuating temperatures on the population dynamics of Hexarthra bulgarica (Wiszniewski) from high mountain lakes in Sierra Nevada (Spain)
We examine the development of Hexarthra bulgarica (Wisniewski) populations in relation to thermal stability in natural environments. A high frequency sampling program was developed simultaneously in two high moun...
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Article
Plankton dynamics in a high mountain lake (Las Yeguas, Sierra Nevada, Spain). Indirect evidence of ciliates as food source for zooplankton
A detailed sampling programme during the ice-free season (July–September) in the oligotrophic lake Las Yeguas (Southern Spain) has shown a well-defined time lag between phytoplankton and zooplankton maximum st...
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Chapter
Plankton dynamics in a high mountain lake (Las Yeguas, Sierra Nevada, Spain). Indirect evidence of ciliates as food source for zooplankton
A detailed sampling programme during the ice-free season (July-September) in the oligotrophic lake Las Yeguas (Southern Spain) has shown a well-defined time lag between phytoplankton and zooplankton maximum st...
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Article
Effectiveness of the caudal spine as a defense mechanism in Keratella cochlearis
The temporal distribution of spined and unspined forms of Keratella cochlearis in Cubillas reservoir during an annual cycle, and the stomach contents of Asplanchna girodi, were studied. The results suggest that t...
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Chapter and Conference Paper
Effectiveness of the caudal spine as a defense mechanism in Keratella cochlearis
The temporal distribution of spined and unspined forms of Keratella cochlearis in Cubillas reservoir during an annual cycle, and the stomach contents of Asplanchna girodi, were studied. The results suggest that t...
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Article
Analysis of phytoplankton-zooplankton relationships in an oligotrophic lake under natural and manipulated conditions
During August, 1987, we performed a series of Limnocorral experiments in lake La Caldera, a small winter-kill lake in which phytoplankton is strikingly nutrient-limited. The effects of biomanipulation on zoopl...
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Chapter and Conference Paper
Analysis of phytoplankton-zooplankton relationships in an oligotrophic lake under natural and manipulated conditions
During August, 1987, we performed a series of Limnocorral experiments in lake La Caldera, a small winter-kill lake in which phytoplankton is strikingly nutrient-limited. The effects of biomanipulation on zoopl...
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Article
Empirical evidence for a complex diurnal movement in Hexarthra bulgarica from an oligotrophic high mountain lake (La Caldera, Spain)
A detailed 24 hour sampling program has been carried out at 26 depths of 6 stations located along the two main transects of lake La Caldera. The resultant data has allowed us to define for H. bulgarica a general ...
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Article
Patterns in the composition of the rotifer communities from high mountain lakes and ponds in Sierra Nevada (Spain)
On the basis of periodic collections of rotifers from 29 lakes and ponds over 2500 m above sea level in the Sierra Nevada (Southern Spain), patterns of species richness, distribution and community composition ...
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Chapter and Conference Paper
Patterns in the composition of the rotifer communities from high mountain lakes and ponds in Sierra Nevada (Spain)
On the basis of periodic collections of rotifers from 29 lakes and ponds over 2500 m above sea level in the Sierra Nevada (Southern Spain), patterns of species richness, distribution and community composition ...
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Chapter and Conference Paper
Empirical evidence for a complex diurnal movement in Hexarthra bulgarica from an oligotrophic high mountain lake (La Caldera, Spain)
A detailed 24 hour sampling program has been carried out at 26 depths of 6 stations located along the two main transects of lake La Caldera. The resultant data has allowed us to define for H. bulgarica a general ...
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Article
Taxonomic and ecological notes on Hexarthra bulgarica from high mountain lakes and ponds in the Sierra Nevada (Spain)
Hexarthra bulgarica was found in 16 of the 37 high mountain lakes (over 2500 m) studied in the Sierra Nevada (Southern Spain). These populations resemble closely the subspecies H. b. canadensis. Data on the morp...
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Chapter and Conference Paper
Taxonomic and ecological notes on Hexarthra bulgarica from high mountain lakes and ponds in the Sierra Nevada (Spain)
Hexarthra bulgarica was found in 16 of the 37 high mountain lakes (over 2500 m) studied in the Sierra Nevada (Southern Spain). These populations resemble closely the subspecies H. b. canadensis. ...
