Diss für PDF - Deutsche Digitale Bibliothek
... The life cycle of copepods in tropical and subtropical regions is characterised by continuous and irregular breeding throughout the year without any seasonality. This, together with lacking seasonal variation in prosome length (Chisholm and Roff 1990a) makes it difficult to identify successive brood ...
... The life cycle of copepods in tropical and subtropical regions is characterised by continuous and irregular breeding throughout the year without any seasonality. This, together with lacking seasonal variation in prosome length (Chisholm and Roff 1990a) makes it difficult to identify successive brood ...
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... was on average 24 % lower in trawled corridors than in reference corridors. At the species level, this biomass difference was significant for snow crabs C. opilio, sand dollars Echinarachniusparma, brittle stars Ophiura sarsi, sea urchins Strongylocentrotuspallidus and soft corals Gersemia sp. The r ...
... was on average 24 % lower in trawled corridors than in reference corridors. At the species level, this biomass difference was significant for snow crabs C. opilio, sand dollars Echinarachniusparma, brittle stars Ophiura sarsi, sea urchins Strongylocentrotuspallidus and soft corals Gersemia sp. The r ...
Feeding of detritivores in freshwater sediments
... material (e.g. from recently died algae) is deprived of the most nutritious components and only part of the lost biomass is replaced by microbial biomass. Therefore, detritivores probably have to deal with food sources of low nutritional value which will vary with states of degradation and microbial ...
... material (e.g. from recently died algae) is deprived of the most nutritious components and only part of the lost biomass is replaced by microbial biomass. Therefore, detritivores probably have to deal with food sources of low nutritional value which will vary with states of degradation and microbial ...
Influence of nymphal Anax imperator (Odonata
... attention. Schmitz et al. (1997) demonstrated that nonlethal spiders caused an overall decrease in feeding rate (herbivory) and thus an increase in plant biomass. A behavioral trophic cascade is also possible if animals avoid a particular habitat while foraging or do not lay eggs in this habitat in ...
... attention. Schmitz et al. (1997) demonstrated that nonlethal spiders caused an overall decrease in feeding rate (herbivory) and thus an increase in plant biomass. A behavioral trophic cascade is also possible if animals avoid a particular habitat while foraging or do not lay eggs in this habitat in ...
Abalone - Dauphin Island Sea Lab
... Shells are part of the jewelry industry cause they’re pretty ...
... Shells are part of the jewelry industry cause they’re pretty ...
Lethal interactions among vertebrate top predators
... Lethal interactions among large vertebrate predators have long interested researchers because of ecological and conservation issues. Research focusing on lethal interactions among vertebrate top predators has used several terms with a broad sense, and also introduced new terminology. We analysed the ...
... Lethal interactions among large vertebrate predators have long interested researchers because of ecological and conservation issues. Research focusing on lethal interactions among vertebrate top predators has used several terms with a broad sense, and also introduced new terminology. We analysed the ...
Water Surface Area and Depth Determine
... bottoms of the mosquito net were tucked underneath the frame, and packed with sand to seal the cages. Cages were arranged in two rows, on the east and west sides of the pole barn. The east side was more shaded by trees; the west side opened onto a grass Þeld. At the end of each experiment, we brough ...
... bottoms of the mosquito net were tucked underneath the frame, and packed with sand to seal the cages. Cages were arranged in two rows, on the east and west sides of the pole barn. The east side was more shaded by trees; the west side opened onto a grass Þeld. At the end of each experiment, we brough ...
Pond tadpoles with generalized morphology: is it time to reconsider
... similar size. In this case even when per capita consumption of macroinvertebrates is low, the collective eect of tadpole predation can be signi®cant. Second, tadpoles have rapid gut clearance rates that typically average <6±8 h when animals are fed ad libitum (Savage 1952; Calef 1973; Wassersug 197 ...
... similar size. In this case even when per capita consumption of macroinvertebrates is low, the collective eect of tadpole predation can be signi®cant. Second, tadpoles have rapid gut clearance rates that typically average <6±8 h when animals are fed ad libitum (Savage 1952; Calef 1973; Wassersug 197 ...
Dowload An inventory and assessment of anchialine pools in Hawaii Volcanoes National Park
... deep, subsurface and bottom measurements were taken to determine stratification. In pools less than one meter deep, only stable bottom measurements were taken. Surface salinity measurements often fluctuate with the influx of fresh groundwater. ~emperatureand salinity were selected for measurement be ...
... deep, subsurface and bottom measurements were taken to determine stratification. In pools less than one meter deep, only stable bottom measurements were taken. Surface salinity measurements often fluctuate with the influx of fresh groundwater. ~emperatureand salinity were selected for measurement be ...
special feature - Department of Ecology and Evolutionary Biology
... Omnivory, broadly defined as feeding on more than one trophic level, is an ecological habit that ought to be widespread. At the most basic level, the omnivorous animal, as a generalist, should have higher performance in variable environments than some more specialized feeder. Yet the problem of whic ...
... Omnivory, broadly defined as feeding on more than one trophic level, is an ecological habit that ought to be widespread. At the most basic level, the omnivorous animal, as a generalist, should have higher performance in variable environments than some more specialized feeder. Yet the problem of whic ...
A review of the state of ecological knowledge
... region appears to be macroalgally-depauperate, consisting mainly of pavements of crustforming species (Dawson, 1964), at least in shallow water. ...
... region appears to be macroalgally-depauperate, consisting mainly of pavements of crustforming species (Dawson, 1964), at least in shallow water. ...
Report of the Working Group on XXXXX (XXXX)
... The main fisheries in Faroese waters are mixed-species, demersal fisheries and singlespecies, pelagic fisheries. The demersal fisheries are mainly conducted by Faroese fishermen, whereas the major part of the pelagic fisheries are conducted by foreign fishermen licensed through bilateral and multila ...
... The main fisheries in Faroese waters are mixed-species, demersal fisheries and singlespecies, pelagic fisheries. The demersal fisheries are mainly conducted by Faroese fishermen, whereas the major part of the pelagic fisheries are conducted by foreign fishermen licensed through bilateral and multila ...
protist grazing on marine bacterioplankton
... that heterotrophic nanoflagellates were indeed adapted for sustained growth on suspended bacteria in the ocean and potentially capable of controlling bacterial numbers. Several field studies in different marine systems corroborated the importance of flagellate bacterivory (Sieburth 1984). The transf ...
... that heterotrophic nanoflagellates were indeed adapted for sustained growth on suspended bacteria in the ocean and potentially capable of controlling bacterial numbers. Several field studies in different marine systems corroborated the importance of flagellate bacterivory (Sieburth 1984). The transf ...
A Simple Technique for Trapping Siren lacertina, Amphiuma means
... minnow traps is that they can be set in water up to 60 cm d~epwithout concemfor drowning animals. Therefore they can sample a larger area of wetlands than standard funnel traps, which need to be set in shallower water or equipped with floats (Casazzaet al. 2000). When equipped with floats minnow tra ...
... minnow traps is that they can be set in water up to 60 cm d~epwithout concemfor drowning animals. Therefore they can sample a larger area of wetlands than standard funnel traps, which need to be set in shallower water or equipped with floats (Casazzaet al. 2000). When equipped with floats minnow tra ...
Density-dependent facilitation cascades determine
... via facilitation cascades. We examined the density dependencies of facilitation cascades, including how the density of a basal foundation species influences the density of secondary foundation species, and how the density of secondary foundation species influences community structure. The system in wh ...
... via facilitation cascades. We examined the density dependencies of facilitation cascades, including how the density of a basal foundation species influences the density of secondary foundation species, and how the density of secondary foundation species influences community structure. The system in wh ...
Galápagos macroalgae: A review of the state of ecological knowledge
... Abstract: Previous work has highlighted the critical role of macroalgal productivity and dynamics in supporting and structuring marine food webs. Spatio-temporal variability in macroalgae can alter coastal ecosystems, a relationship particularly visible along upwelling-influenced coastlines. As a re ...
... Abstract: Previous work has highlighted the critical role of macroalgal productivity and dynamics in supporting and structuring marine food webs. Spatio-temporal variability in macroalgae can alter coastal ecosystems, a relationship particularly visible along upwelling-influenced coastlines. As a re ...
Baltic photic sand dominated by stable
... Baltic bottoms in the photic zone with at least 90% coverage of sand. Sand has less than 20% of mud/silt/clay fraction (<63 µm), and the proportion of sand (grain size 0.063–2 mm) exceeds 70% of the combined gravel and sand fraction. Stable aggregations of unattached perennial vegetation covers at l ...
... Baltic bottoms in the photic zone with at least 90% coverage of sand. Sand has less than 20% of mud/silt/clay fraction (<63 µm), and the proportion of sand (grain size 0.063–2 mm) exceeds 70% of the combined gravel and sand fraction. Stable aggregations of unattached perennial vegetation covers at l ...
Population-Level Metrics of Trophic Structure Based on
... metrics were adapted from community–level metrics developed originally by Layman et al. [12] based on the mean d13C and d15N of all species in a community. We used the stable isotope values from all individuals sampled in these calculations, resulting in final metric values encompassing intra-popula ...
... metrics were adapted from community–level metrics developed originally by Layman et al. [12] based on the mean d13C and d15N of all species in a community. We used the stable isotope values from all individuals sampled in these calculations, resulting in final metric values encompassing intra-popula ...