TY  - JOUR
A1  - Schibalski, Anett
A1  - Lehtonen, Aleksi
A1  - Schroeder, Boris
T1  - Climate change shifts environmental space and limits transferability of treeline models
JF  - Ecography : pattern and diversity in ecology ; research papers forum
N2  - Our study aims at gaining insights into the processes determining the current treeline dynamics in Finnish Lapland. Using forest surveys conducted in 1978 and 2003 we modelled the occurrence and abundance of three dominant tree species in Finnish Lapland, i.e. Pinus sylvestris, Picea abies and Betula pubescens, with boosted regression trees. We assessed the importance of climatic, biotic and topographic variables in predicting tree occurrence and abundance based on their relative importance and response curves. We compared temporal and spatial transferability by using an extended transferability index.
 Site fertility, the abundance of co-occurring species and growing degree days were generally the most important predictors for both occurrence and abundance across all species and datasets. Climatic predictors were more important for modelling occurrences than for modelling abundances. Occurrence models were able to reproduce the observed treeline pattern within one time period or region. Abundance models underestimated basal area but captured the general pattern of low and high values. Model performance as well as transferability differed considerably between species and datasets. Pinus sylvestris was modelled more successfully than P. abies and B. pubescens. Generally, spatial transferability was greater than temporal transferability. Comparing the environmental space between datasets revealed that transferring models means extrapolating to novel environments, providing a plausible explanation for limited transferability.
 Our study illustrates how climate change can shift the environmental space and lead to limited model transferability. We identified non-climatic factors to be important in predicting the distribution of dominant tree species, contesting the widespread assumption of climatically induced range expansion.
Y1  - 2014
U6  - https://doi.org/10.1111/j.1600-0587.2013.00368.x
SN  - 0906-7590
SN  - 1600-0587
VL  - 37
IS  - 4
SP  - 321
EP  - 335
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Müller, Eva Nora
A1  - van Schaik, Loes
A1  - Blume, Theresa
A1  - Bronstert, Axel
A1  - Carus, Jana
A1  - Fleckenstein, Jan H.
A1  - Fohrer, Nicola
A1  - Geissler, Katja
A1  - Gerke, Horst H.
A1  - Gräff, Thomas
A1  - Hesse, Cornelia
A1  - Hildebrandt, Anke
A1  - Hölker, Franz
A1  - Hunke, Philip
A1  - Körner, Katrin
A1  - Lewandowski, Jörg
A1  - Lohmann, Dirk
A1  - Meinikmann, Karin
A1  - Schibalski, Anett
A1  - Schmalz, Britta
A1  - Schröder-Esselbach, Boris
A1  - Tietjen, Britta
T1  - Scales, key aspects, feedbacks and challenges of ecohydrological research in Germany
JF  - Hydrologie und Wasserbewirtschaftung
N2  - Ecohydrology analyses the interactions of biotic and abiotic aspects of our ecosystems and landscapes. It is a highly diverse discipline in terms of its thematic and methodical research foci. This article gives an overview of current German ecohydrological research approaches within plant-animal-soil-systems, meso-scale catchments and their river networks, lake systems, coastal areas and tidal rivers. It discusses their relevant spatial and temporal process scales and different types of interactions and feedback dynamics between hydrological and biotic processes and patterns. The following topics are considered key challenges: innovative analysis of the interdisciplinary scale continuum, development of dynamically coupled model systems, integrated monitoring of coupled processes at the interface and transition from basic to applied ecohydrological science to develop sustainable water and land resource management strategies under regional and global change.
KW  - Coastal regions
KW  - drylands
KW  - ecohydrological modelling
KW  - feedback
KW  - hyporheic zone
KW  - meso-scale ecosystems
KW  - plant-animal-soil-system
KW  - river networks
Y1  - 2014
U6  - https://doi.org/10.5675/HyWa_2014,4_2
SN  - 1439-1783
VL  - 58
IS  - 4
SP  - 221
EP  - 240
PB  - Bundesanst. für Gewässerkunde
CY  - Koblenz
ER  -