Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1111/oik.07431
Licence creative commons licence
Title (Primary) Intraspecific trait variation in personality‐related movement behavior promotes coexistence
Author Milles, A.; Dammhahn, M.; Grimm, V.
Journal Oikos
Year 2020
Department OESA; iDiv
Volume 129
Issue 10
Page From 1441
Page To 1454
Language englisch
Keywords coexistence; animal behavior; animal movement; individual‐based model; competitive ability; foraging
Abstract Movement behavior is an essential element of fundamental ecological processes such as competition and predation. Although intraspecific trait variation (ITV) in movement behaviors is pervasive, its consequences for ecological community dynamics are still not fully understood. Using a newly developed individual‐based model, we analyzed how given and constant ITVs in foraging movement affect differences in foraging efficiencies between species competing for common resources under various resource distributions. Further, we analyzed how the effect of ITV on emerging differences in competitive abilities ultimately affects species coexistence. The model is generic but mimics observed patterns of among‐individual covariation between personality, movement and space use in ground‐dwelling rodents. Interacting species differed in their mean behavioral types along a slow‐fast continuum, integrating consistent individual variation in average behavioral expression and responsiveness (i.e., behavioral reaction norms). We found that ITV reduced interspecific differences in competitive abilities by 5 to 35 % and thereby promoted coexistence via an equalizing mechanism. The emergent relationships between behavioral types and foraging efficiency are characteristic for specific environmental contexts of resource distribution and population density. As these relationships are asymmetric, species that were either ‘too fast’ or ‘too slow’ benefited differently from ITV. Thus, ITV in movement behavior has consequences for species coexistence but to predict its effect in a given system requires intimate knowledge on how variation in movement traits relates to fitness components along an environmental gradient.
Persistent UFZ Identifier
Milles, A., Dammhahn, M., Grimm, V. (2020):
Intraspecific trait variation in personality‐related movement behavior promotes coexistence
Oikos 129 (10), 1441 - 1454