a large decomposing tree trunk that has fallen, usually in a forest; the decaying wood provides moisture and nutrients for a variety of insects and plants
enter into a log, as on ships and planes
a segment of the trunk of a tree when stripped of branches
measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ships speed through the water
a written record of events on a voyage (of a ship or plane)
a written record of messages sent or received; "they kept a log of all transmission by the radio station"; "an email log"
treat carefully; "He nursed his injured back by lying in bed several hours every afternoon"; "He nursed the flowers in his garden and fertilized them regularly"
try to cure by special care of treatment, of an illness or injury; "He nursed his cold with Chinese herbs"
one skilled in caring for young children or the sick (usually under the supervision of a physician)
serve as a nurse; care for sick or handicapped people
Nurse log in Avatar Grove, British Columbia, Canada
A nurse log is a fallen tree which, as it decays, provides ecological facilitation to seedlings. Broader definitions include providing shade or support to other plants. Some of the advantages a nurse log offers to a seedling are: water, moss thickness, leaf litter, mycorrhizae, disease protection, nutrients, and sunlight. Recent research into soil pathogens suggests that in some forest communities, pathogens hostile to a particular tree species appear to gather in the vicinity of that species, and to a degree inhibit seedling growth.[1] Nurse logs may therefore provide some measure of protection from these pathogens, thus promoting greater seedling survivorship.
Contents
1Occurrence
2References
3Books
4External links
Occurrence
Various mechanical and biological processes contribute to the breakdown of lignin in fallen trees, resulting in the formation of niches of increasing size, which tend to fill with forest litter such as soil from spring floods, needles, moss, mushrooms and other flora. Mosses also can cover the outside of a log, hastening its decay and supporting other species as rooting media and by retaining water. Small animals such as various squirrels often perch or roost on nurse logs, adding to the litter by food debris and scat. The decay of this detritus contributes to the formation of a rich humus that provides a seedbed and adequate conditions for germination.
Nurse log harboring a young western hemlock
Nurse logs often provide a seedbed to conifers in a temperate rain forest ecosystem.
References
^Mangan, Scott A.; Schnitzer, Stefan A.; Herre, Edward A.; Mack, Keenan M. L.; Valencia, Mariana C.; Sanchez, Evelyn I.; Bever, James D. (2010). "Negative plant–soil feedback predicts tree-species relative abundance in a tropical forest". Nature. 466 (7307): 752–755. doi:10.1038/nature09273. PMID 20581819. Retrieved 3 February 2018.
Books
Montagnini, Florencia, and Benedict, Carl F. Jordan (2005). Tropical Forest Ecology: The Basis for Conservation and Management (1st ed.). Berlin: Springer. ISBN 3-540-23797-6.
Noss, Reed F. (Ed). The Redwood Forest: History, Ecology, and Conservation of the Coast Redwoods (1999). San Francisco: Island Press. ISBN 1-55963-726-9
Mathews, Daniel (1999). Cascade-Olympic Natural History (2nd ed.). Portland, Oregon : Raven Editions. ISBN 0-9620782-1-2
External links
Mangan, Scott A., et al. "Negative plant–soil feedback predicts tree-species relative abundance in a tropical forest", Nature, New York, 2010-June-25. Retrieved on 2010-June-25
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Analysis of the factors influencing healthcare professionals' adoption of mobile electronic medical record (EMR) using the unified theory of acceptance and use of technology (UTAUT) in a tertiary hospital.
Kim S1, Lee KH2, Hwang H3, Yoo S4.
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BACKGROUND: Although the factors that affect the end-user's intention to use a new system and technology have been researched, the previous studies have been theoretical and do not verify the factors that affected the adoption of a new system. Thus, this study aimed to confirm the factors that influ
User evaluation of patient counselling, combining nurse consultation and eHealth in hand eczema.
Mollerup A1, Harboe G2, Johansen JD1.
Contact dermatitis.Contact Dermatitis.2016 Jan 29. doi: 10.1111/cod.12534. [Epub ahead of print]
BACKGROUND AND OBJECTIVE: This study reports the findings from a user evaluation of a counselling programme for hand eczema patients in which face-to-face encounters were supplemented with user access to a new website.PATIENTS AND METHODS: Patients treated for hand eczema in two different settings w
Parental smoking during pregnancy and the risk of gestational diabetes in the daughter.
Bao W1, Michels KB2, Tobias DK3, Li S1, Chavarro JE4, Gaskins AJ5, Vaag AA6, Hu FB4, Zhang C7.
International journal of epidemiology.Int J Epidemiol.2016 Jan 9. pii: dyv334. [Epub ahead of print]
BACKGROUND: Fetal exposure to parental smoking may have long-term impact on the development of disease in adulthood. We examined the association of parental smoking during pregnancy with risk of gestational diabetes mellitus (GDM) in the daughter.METHODS: We included 15 665 singleton pregnancies f
Journal of occupational health 50(1), 7-12, 2008-01
… Also, the log-transformed tail length was significantly longer, in the 57 nurses who had handled antineoplastic drugs in the last six months, than that in the 46 control subjects (p<0.05); … but, no significant difference in tail length or tail moment was seen between the two nurse groups with and without experience of handling hazardous drugs (p>0.05). …