scholarly journals Trait‐similarity and trait‐hierarchy jointly determine fine‐scale spatial associations of resident and invasive ant species

Ecography ◽  
2020 ◽  
Author(s):  
Mark K. L. Wong ◽  
Toby P. N. Tsang ◽  
Owen T. Lewis ◽  
Benoit Guénard
Keyword(s):  
Fine Scale ◽  
Invasive Ant ◽  
Spatial Associations ◽  
Trait Similarity

Fine‐scale spatial associations between functional traits and tree growth

Oikos ◽  
2021 ◽  
Author(s):  
Alex Fajardo ◽  
Eduardo Velázquez
Keyword(s):  
Functional Traits ◽  
Tree Growth ◽  
Fine Scale ◽  
Spatial Associations

scholarly journals Trait-similarity and trait-hierarchy jointly determine co-occurrences of resident and invasive ant species

2020 ◽  
Author(s):  
Mark K. L. Wong ◽  
Toby P. N. Tsang ◽  
Owen T. Lewis ◽  
Benoit Guénard
Keyword(s):  
Solenopsis Invicta ◽  
Competitive Ability ◽  
Competitive Exclusion ◽  
Assembly Rules ◽  
Ecological Communities ◽  
Relative Importance ◽  
Invasive Ant ◽  
Phenotypic Differences ◽  
Trait Similarity ◽  
Dominant Process

AbstractInterspecific competition, a dominant process structuring ecological communities, acts on species’ phenotypic differences. Species with similar traits should compete intensely (trait-similarity), while those with traits that confer competitive ability should outcompete others (trait-hierarchy). Either or both of these mechanisms may drive competitive exclusion within a community, but their relative importance and interacting effects are rarely studied. We show empirically that spatial associations (pairwise co-occurrences) between an invasive ant Solenopsis invicta and 28 other ant species across a relatively homogenous landscape are explained largely by an interaction of trait-similarity and trait-hierarchy in one morphological trait. We find that increasing trait-hierarchy leads to more negative associations; however these effects are counteracted when species are sufficiently dissimilar (by 37-95%) in their trait ranges. We also show that a model of species co-occurrences integrating trait-similarity and trait-hierarchy consolidates predictions of different theoretical assembly rules. This highlights the explanatory potential of the trait-based co-occurrence approach.

scholarly journals Genetic diversity is positively associated with fine-scale momentary abundance of an invasive ant

2012 ◽  
Vol 2 (9) ◽  
pp. 2091-2105 ◽  
Author(s):  
Monica A. M. Gruber ◽  
Benjamin D. Hoffmann ◽  
Peter A. Ritchie ◽  
Philip J. Lester
Keyword(s):  
Genetic Diversity ◽  
Fine Scale ◽  
Invasive Ant

Linking trait similarity to interspecific spatial associations in a moist tropical forest

2015 ◽  
Vol 26 (6) ◽  
pp. 1068-1079 ◽  
Author(s):  
Eduardo Velázquez ◽  
C. E. Timothy Paine ◽  
Felix May ◽  
Thorsten Wiegand
Keyword(s):  
Tropical Forest ◽  
Spatial Associations ◽  
Trait Similarity

High Resolution Stereography of Complementary Freeze-Fracture Replicas Reveals the Presence of Depressions Opposite Membrane Associated Particles of Split Membranes

1971 ◽  
Vol 29 ◽  
pp. 442-443
Author(s):  
Russell L. Steere
Keyword(s):  
High Resolution ◽  
Cardiac Muscle ◽  
Electron Micrographs ◽  
Chromic Acid ◽  
Freeze Fracture ◽  
Distilled Water ◽  
Fine Scale ◽  
Acid Cleaning ◽  
Cleaning Solution

Complementary replicas have revealed the fact that the two common faces observed in electron micrographs of freeze-fracture and freeze-etch specimens are complementary to each other and are thus the new faces of a split membrane rather than the original inner and outer surfaces (1, 2 and personal observations). The big question raised by published electron micrographs is why do we not see depressions in the complementary face opposite membrane-associated particles? Reports have appeared indicating that some depressions do appear but complementarity on such a fine scale has yet to be shown.Dog cardiac muscle was perfused with glutaraldehyde, washed in distilled water, then transferred to 30% glycerol (material furnished by Dr. Joaquim Sommer, Duke Univ., and VA Hospital, Durham, N.C.). Small strips were freeze-fractured in a Denton Vacuum DFE-2 Freeze-Etch Unit with complementary replica tooling. Replicas were cleaned in chromic acid cleaning solution, then washed in 4 changes of distilled water and mounted on opposite sides of the center wire of a Formvar-coated grid.

Maintaining Verbal-Spatial Associations in Working Memory: The Influence of Encoding Time

2013 ◽  
Author(s):  
Naomi Langerock ◽  
Evie Vergauwe ◽  
Pierre Barrouillet
Keyword(s):  
Working Memory ◽  
Spatial Associations

Attention is required for the acquisition of new spatial associations but not their expression

2010 ◽  
Author(s):  
James Miles ◽  
Robert Proctor
Keyword(s):  
Spatial Associations

Fine-scale temporal study of the influence of hydrobiological conditions on the spawning of the sea urchin Strongylocentrotus intermedius

2016 ◽  
Vol 550 ◽  
pp. 147-161 ◽  
Author(s):  
PM Zhadan ◽  
MA Vaschenko ◽  
VB Lobanov ◽  
AF Sergeev ◽  
SA Kotova
Keyword(s):  
Sea Urchin ◽  
Strongylocentrotus Intermedius ◽  
Fine Scale ◽  
Temporal Study

Fine-scale taxonomic and temporal variability in the energy density of invertebrate prey of juvenile Chinook salmon Oncorhynchus tshawytscha

2020 ◽  
Vol 655 ◽  
pp. 185-198
Author(s):  
J Weil ◽  
WDP Duguid ◽  
F Juanes
Keyword(s):  
Energy Density ◽  
Chinook Salmon ◽  
Temporal Variability ◽  
Energy Content ◽  
Single Point ◽  
Single Species ◽  
Fine Scale ◽  
Temporal Differences ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook

Variation in the energy content of prey can drive the diet choice, growth and ultimate survival of consumers. In Pacific salmon species, obtaining sufficient energy for rapid growth during early marine residence is hypothesized to reduce the risk of size-selective mortality. In order to determine the energetic benefit of feeding choices for individuals, accurate estimates of energy density (ED) across prey groups are required. Frequently, a single species is assumed to be representative of a larger taxonomic group or related species. Further, single-point estimates are often assumed to be representative of a group across seasons, despite temporal variability. To test the validity of these practices, we sampled zooplankton prey of juvenile Chinook salmon to investigate fine-scale taxonomic and temporal differences in ED. Using a recently developed model to estimate the ED of organisms using percent ash-free dry weight, we compared energy content of several groups that are typically grouped together in growth studies. Decapod megalopae were more energy rich than zoeae and showed family-level variability in ED. Amphipods showed significant species-level variability in ED. Temporal differences were observed, but patterns were not consistent among groups. Bioenergetic model simulations showed that growth rate of juvenile Chinook salmon was almost identical when prey ED values were calculated on a fine scale or on a taxon-averaged coarse scale. However, single-species representative calculations of prey ED yielded highly variable output in growth depending on the representative species used. These results suggest that the latter approach may yield significantly biased results.

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