Being high is better: Effects of elevation and habitat on arctic ground squirrel demography

Article Abstract:

The effect of local environment on the demography and population dynamics of arctic ground squirrels is investigated by comparing reproduction, survival, and population trends of squirrels living in low elevation boreal forest and high elevation alpine tundra sites in southwestern Yukon Territory, Canada. However the variation in demographic rates between ground squirrels living at high and low elevation may arise from phenotypic responses of squirrels to different habitat structure.

Goods & services distribution, Channels of Distribution, Yukon Territory, Behavior, Environmental aspects, Distribution, Ground squirrels, Company distribution practices

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Comparison of discriminant function and classification tree analyses for age classification of marmots

Article Abstract:

The predictive power of two classification techniques such as discriminant function analysis (DFA) and classification and regression tree analysis (CART) is evaluated to provide a non-subjective quantitative method of determining age class in Vancouver Island marmots and hoary marmots. It was found that DFA was marginally better at discriminating among older more challenging age classes as compared to CART.

Factor analysis, Discriminant analysis, Zoological specimens, Animal specimens, Marmots

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What determines disturbance-productivity-diversity relationships? The effect of scale, species and environment on richness patterns in Australian woodland

Article Abstract:

The variations in relationships between diversity, disturbance and productivity are examined. The patterns of native, exotic and total plant species richness at two scales are investigated.

Australia, Analysis, Plants, Plant reproduction, Plant specimens

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