Life at the edge: an experimental study of a poleward range boundary

Experimental studies of biogeographic processes are important, but rarely attempted because of the logistical challenges of research at large spatial scales. I used a series of large-scale transplant experiments to investigate the mechanisms controlling species abundance near a poleward range bounda...

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Veröffentlicht in:Oecologia 2006-06, Vol.148 (2), p.270-279
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description Experimental studies of biogeographic processes are important, but rarely attempted because of the logistical challenges of research at large spatial scales. I used a series of large-scale transplant experiments to investigate the mechanisms controlling species abundance near a poleward range boundary. The intertidal limpet Collisella scabra experiences a 100-fold decline in abundance over the northernmost 300 km of its range. Temperature and food supply both strongly influenced individual survival growth, and maturation. Regression analysis also revealed significant interactions among these conditions: the effect of one could not be predicted without knowing the level of the other. But these relationships could not explain geographic abundance patterns. Instead, individual limpets were highly successful at sites with relatively low abundance. These results suggest that, even though temperature is important to the success of individual C. scabra populations, the primary effect of warning temperatures under climate change may not be a shift in geographic distribution.
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I used a series of large-scale transplant experiments to investigate the mechanisms controlling species abundance near a poleward range boundary. The intertidal limpet Collisella scabra experiences a 100-fold decline in abundance over the northernmost 300 km of its range. Temperature and food supply both strongly influenced individual survival growth, and maturation. Regression analysis also revealed significant interactions among these conditions: the effect of one could not be predicted without knowing the level of the other. But these relationships could not explain geographic abundance patterns. Instead, individual limpets were highly successful at sites with relatively low abundance. 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I used a series of large-scale transplant experiments to investigate the mechanisms controlling species abundance near a poleward range boundary. The intertidal limpet Collisella scabra experiences a 100-fold decline in abundance over the northernmost 300 km of its range. Temperature and food supply both strongly influenced individual survival growth, and maturation. Regression analysis also revealed significant interactions among these conditions: the effect of one could not be predicted without knowing the level of the other. But these relationships could not explain geographic abundance patterns. Instead, individual limpets were highly successful at sites with relatively low abundance. 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subjects Analytical estimating
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Biological and medical sciences
California
Climate change
Coastal ecology
Cold Climate
Collisella scabra
Demecology
Density estimation
Eukaryota
Food supply
Fundamental and applied biological sciences. Psychology
Gastropoda - physiology
Geographical distribution
Geography
Invertebrates
Marine ecology
Mollusca
Oregon
Pacific Ocean
Population Ecology
Population estimates
Population growth
Protozoa. Invertebrata
Regression analysis
Temperature
Trajectory control
Water temperature
Winter
title Life at the edge: an experimental study of a poleward range boundary
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