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Selection: Schröder:B [4 articles] 

Publications by author Schröder:B.
 

Cross-validation strategies for data with temporal, spatial, hierarchical, or phylogenetic structure

  
Ecography, Vol. 40, No. 8. (1 August 2017), pp. 913-929, https://doi.org/10.1111/ecog.02881

Abstract

Ecological data often show temporal, spatial, hierarchical (random effects), or phylogenetic structure. Modern statistical approaches are increasingly accounting for such dependencies. However, when performing cross-validation, these structures are regularly ignored, resulting in serious underestimation of predictive error. One cause for the poor performance of uncorrected (random) cross-validation, noted often by modellers, are dependence structures in the data that persist as dependence structures in model residuals, violating the assumption of independence. Even more concerning, because often overlooked, is that structured data also ...

 

Collinearity: a review of methods to deal with it and a simulation study evaluating their performance

  
Ecography, Vol. 36, No. 1. (1 January 2013), pp. 27-46, https://doi.org/10.1111/j.1600-0587.2012.07348.x

Abstract

Collinearity refers to the non independence of predictor variables, usually in a regression-type analysis. It is a common feature of any descriptive ecological data set and can be a problem for parameter estimation because it inflates the variance of regression parameters and hence potentially leads to the wrong identification of relevant predictors in a statistical model. Collinearity is a severe problem when a model is trained on data from one region or time, and predicted to another with a different or ...

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Temporal and spatial dynamic of stool uprooting in abandoned chestnut coppice forests

  
Forest Ecology and Management, Vol. 235, No. 1-3. (November 2006), pp. 88-95, https://doi.org/10.1016/j.foreco.2006.08.008

Abstract

Chestnut (Castanea sativa Mill.) coppice is a man-made forest type that has been managed for centuries in short rotations to rapidly produce woody biomass. These forests, which nowadays cover significant areas within Europe, experience a general neglect and are subsequently being abandoned. Most of them are now over-aged, very dense, and highly monotone. Little is known about their development. The increasing frequency of uprooting events of stools (i.e. a whole stump including the shoots that originated after coppicing), is raising concern ...

 

How can we bring together empiricists and modellers in functional biodiversity research?

  
Basic and Applied Ecology, Vol. 14, No. 2. (March 2013), pp. 93-101, https://doi.org/10.1016/j.baae.2013.01.001

Abstract

Improving our understanding of biodiversity and ecosystem functioning and our capacity to inform ecosystem management requires an integrated framework for functional biodiversity research (FBR). However, adequate integration among empirical approaches (monitoring and experimental) and modelling has rarely been achieved in FBR. We offer an appraisal of the issues involved and chart a course towards enhanced integration. A major element of this path is the joint orientation towards the continuous refinement of a theoretical framework for FBR that links theory testing and ...

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