Algal nutrient limitation affects rotifer growth rate but not ingestion rate

Density but not climate affects the population growth rate of guanacos ( ) ( Artiodactyla , Camelidae )

We analyzed the effects of population density and climatic variables on the rate of population growth in the guanaco ( ), a wild camelid species in Lama guanicoe South America. We used a time series of 36 years (1977-2012) of population sampling in Tierra del Fuego, Chile. Individuals were grouped in three age-classes: newborns, juveniles, and adults; for each year a population transition matri...

Elevated CO2 affects shell dissolution rate but not calcification rate in a marine snail.

As CO(2) levels increase in the atmosphere, so too do they in the sea. Although direct effects of moderately elevated CO(2) in sea water may be of little consequence, indirect effects may be profound. For example, lowered pH and calcium carbonate saturation states may influence both deposition and dissolution rates of mineralized skeletons in many marine organisms. The relative impact of elevat...

Density but not climate affects the population growth rate of guanacos ( Lama guanicoe) (Artiodactyla, Camelidae)

We analyzed the effects of population density and climatic variables on the rate of population growth in the guanaco ( Lama guanicoe), a wild camelid species in South America. We used a time series of 36 years (1977-2012) of population sampling in Tierra del Fuego, Chile. Individuals were grouped in three age-classes: newborns, juveniles, and adults; for each year a female population transition...

Effects of growth rate and nutrient limitation on virulence factor production in Burkholderia cepacia.

The influence of growth rate and oxygen availability on siderophore, protease, and lipase production in Burkholderia cepacia was assessed for cells grown in a chemostat under iron limitation. Whereas siderophore and protease production increased with growth rate and oxygen yet decreased under oxygen depletion, lipase production demonstrated the opposite trend.

Algal Nutrient Limitation throughout the Little Bear River Watershed