Fine-scale spatial structuring in cackling Canada geese related to reproductive performance and breeding philopatry

Abstract Compartmentalization of the gut microbiota is thought to be important to system function, but the extent of spatial organization in the gut ecosystem remains poorly understood. Here, we profile the murine colonic microbiota along longitudinal and lateral axes using laser capture microdissection. We found fine-scale spatial structuring of the microbiota marked by gradients in composition and diversity along the length of the colon. Privation of fiber reduces the diversity of the microbiota and disrupts longitudinal and lateral gradients in microbiota composition. Both mucus-adjacent and luminal communities are influenced by the absence of dietary fiber, with the loss of a characteristic distal colon microbiota and a reduction in the mucosa-adjacent community, concomitant with depletion of the mucus layer. These results indicate that diet has not only global but also local effects on the composition of the gut microbiota, which may affect function and resilience differently depending on location.

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Fine-Scale Analysis Reveals Cryptic Patterns of Genetic Structure in Canada Geese

The Condor ◽

10.1525/cond.2013.120117 ◽

2013 ◽

Vol 115 (4) ◽

pp. 738-749 ◽

Cited By ~ 2

Author(s):

Laura Finnegan ◽

Sarrah Castillo ◽

Jack Hughes ◽

Ken F. Abraham ◽

Rodney W. Brook ◽

...

Keyword(s):

Genetic Structure ◽

Canada Geese ◽

Fine Scale ◽

Scale Analysis

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Fine-scale spatial structuring of genotypes and phenotypes in natural populations of Asclepias syriaca

Perspectives in Plant Ecology Evolution and Systematics ◽

10.1016/j.ppees.2020.125546 ◽

2020 ◽

Vol 45 ◽

pp. 125546

Author(s):

Angela Ricono ◽

Nichole W. Gustafson ◽

Erin Eichenberger ◽

Katherine Stahl ◽

Hannah Call ◽

...

Keyword(s):

Natural Populations ◽

Fine Scale ◽

Asclepias Syriaca ◽

Spatial Structuring

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Factors affecting the reproductive performance of barbary partridges in cereal croplands of Northwestern Morocco: the role of timing of breeding and vegetation cover at fine-scale

Biologia ◽

10.2478/s11756-019-00290-3 ◽

2019 ◽

Vol 75 (2) ◽

pp. 235-241

Author(s):

Saâd Hanane

Keyword(s):

Reproductive Performance ◽

Vegetation Cover ◽

Timing Of Breeding ◽

Fine Scale ◽

Factors Affecting

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

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100066267 ◽

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.

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