TY  - JOUR
A1  - Bae, Soyeon
A1  - Heidrich, Lea
A1  - Levick, Shaun R.
A1  - Gossner, Martin M.
A1  - Seibold, Sebastian
A1  - Weisser, Wolfgang W.
A1  - Magdon, Paul
A1  - Serebryanyk, Alla
A1  - Bässler, Claus
A1  - Schäfer, Deborah
A1  - Schulze, Ernst-Detlef
A1  - Doerfler, Inken
A1  - Müller, Jörg
A1  - Jung, Kirsten
A1  - Heurich, Marco
A1  - Fischer, Markus
A1  - Roth, Nicolas
A1  - Schall, Peter
A1  - Boch, Steffen
A1  - Wöllauer, Stephan
A1  - Renner, Swen C.
A1  - Müller, Jörg
T1  - Dispersal ability, trophic position and body size mediate species turnover processes: Insights from a multi-taxa and multi-scale approach
JF  - Diversity and Distribution
N2  - Aim: Despite increasing interest in β-diversity, that is the spatial and temporal turnover of species, the mechanisms underlying species turnover at different spatial scales are not fully understood, although they likely differ among different functional groups. We investigated the relative importance of dispersal limitations and the environmental filtering caused by vegetation for local, multi-taxa forest communities differing in their dispersal ability, trophic position and body size.
Location: Temperate forests in five regions across Germany.
Methods: In the inter-region analysis, the independent and shared effects of the regional spatial structure (regional species pool), landscape spatial structure (dispersal limitation) and environmental factors on species turnover were quantified with a 1-ha grain across 11 functional groups in up to 495 plots by variation partitioning. In the intra-region analysis, the relative importance of three environmental factors related to vegetation (herb and tree layer composition and forest physiognomy) and spatial structure for species turnover was determined.
Results: In the inter-region analysis, over half of the explained variation in community composition (23% of the total explained 35%) was explained by the shared effects of several factors, indicative of spatially structured environmental filtering. Among the independent effects, environmental factors were the strongest on average over 11 groups, but the importance of landscape spatial structure increased for less dispersive functional groups. In the intra-region analysis, the independent effect of plant species composition had a stronger influence on species turnover than forest physiognomy, but the relative importance of the latter increased with increasing trophic position and body size.
Main conclusions: Our study revealed that the mechanisms structuring assemblage composition are associated with the traits of functional groups. Hence, conservation frameworks targeting biodiversity of multiple groups should cover both environmental and biogeographical gradients. Within regions, forest management can enhance β-diversity particularly by diversifying tree species composition and forest physiognomy.
KW  - body size
KW  - dispersal ability
KW  - environmental filtering
KW  - forest physiognomy
KW  - neutral processes
KW  - plant composition
KW  - regional species pool
KW  - species turnover
KW  - trophic position
KW  - β-diversity
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-236117
VL  - 27
IS  - 3
ER  - 
TY  - JOUR
A1  - Rabl, Dominik
A1  - Alonso-Rodríguez, Aura M.
A1  - Brehm, Gunnar
A1  - Fiedler, Konrad
T1  - Trait variation in moths mirrors small-scaled ecological gradients in a tropical forest landscape
JF  - Insects
N2  - Along environmental gradients, communities are expected to be filtered from the regional species pool by physical constraints, resource availability, and biotic interactions. This should be reflected in species trait composition. Using data on species-rich moth assemblages sampled by light traps in a lowland rainforest landscape in Costa Rica, we show that moths in two unrelated clades (Erebidae-Arctiinae; Geometridae) are much smaller-sized in oil palm plantations than in nearby old-growth forest, with intermediate values at disturbed forest sites. In old-growth forest, Arctiinae predominantly show aposematic coloration as a means of anti-predator defense, whereas this trait is much reduced in the prevalence in plantations. Similarly, participation in Müllerian mimicry rings with Hymenoptera and Lycidae beetles, respectively, is rare in plantations. Across three topographic types of old-growth forests, community-weighted means of moth traits showed little variation, but in creek forest, both types of mimicry were surprisingly rare. Our results emphasize that despite their mobility, moth assemblages are strongly shaped by local environmental conditions through the interplay of bottom–up and top–down processes. Assemblages in oil palm plantations are highly degraded not only in their biodiversity, but also in terms of trait expression.
KW  - Costa Rica
KW  - body size
KW  - mimicry rings
KW  - aposematism
KW  - oil palm plantations
KW  - lowland rainforest
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-213016
SN  - 2075-4450
VL  - 11
IS  - 9
ER  -