Temperature acclimation of the functional parameters of the giant nerve fibres in Lumbricus terrestris L. II. The refractory period.

Temperature acclimation of the functional parameters of the giant nerve fibres in Lumbricus terrestris L. I. Conduction velocity and the duration of the rising and falling phase of action potential.

Stretch-sensitive neural units in the body wall of the earthworm, Lumbricus terrestris L.

1. Sensory neural units responding to sinusoidal stretching of the body wall were studied in the earthworm, Lumbricus terrestris L. 2. A phasic stretch-sensitive unit found in segmental nerve I responded optimally to stretching at frequencies of 4-6/min. 3. The number of spikes per stretch and the spike frequency in the unit were directly related to the amplitude of the applied stretch within a...

پایداری خاکدانه‌ها در حضور کرم خاکی (Lumbricus terrestris L.) و مواد آلی مختلف در یک خاک آهکی

Although the crucial function of earthworms in improvement of soil physical properties is well -know, but very little is known of the interactive influence of earthworms and organic materials on soil properties such as soil aggregate stability, particularly in arid and semi-arid soils. The low organic matter content and the significant role of earthworms in improving physical properties of arid...

Fenestration nodes and the wide submyelinic space form the basis for the unusually fast impulse conduction of shrimp myelinated axons.

Saltatory impulse conduction in invertebrates is rare and has only been found in a few giant nerve fibres, such as the pairs of medial giant fibres with a compact multilayered myelin sheath found in shrimps (Penaeus chinensis and Penaeus japonicus) and the median giant fibre with a loose multilayered myelin sheath found in the earthworm Lumbricus terrestris. Small regions of these nerve fibres ...

Earthworms ( Lumbricus terrestris ) affect plant seedling recruitment and microhabitat heterogeneity

1. The effects of the anecic earthworm Lumbricus terrestris L. on plant seedling recruitment and spatial aggregation were investigated in a microcosm glasshouse experiment by varying plant seed size (small and large); functional groups (grasses, legumes, herbs); plant species diversity (1, 3, 6); and plant functional group diversity (1, 3). 2. Generally, earthworms buried seeds quickly irrespec...