place something or someone in a certain position in order to secretly observe or deceive; "Plant a spy in Moscow"; "plant bugs in the dissidents apartment"
(botany) a living organism lacking the power of locomotion (同)flora, plant life
buildings for carrying on industrial labor; "they built a large plant to manufacture automobiles" (同)works, industrial plant
an actor situated in the audience whose acting is rehearsed but seems spontaneous to the audience
something planted secretly for discovery by another; "the police used a plant to trick the thieves"; "he claimed that the evidence against him was a plant"
put firmly in the mind; "Plant a thought in the students minds" (同)implant
put or set (seeds, seedlings, or plants) into the ground; "Lets plant flowers in the garden" (同)set
place into a river; "plant fish"
make plans for something; "He is planning a trip with his family"
scale drawing of a structure; "the plans for City Hall were on file" (同)architectural plan
a series of steps to be carried out or goals to be accomplished; "they drew up a six-step plan"; "they discussed plans for a new bond issue" (同)program, programme
have the will and intention to carry out some action; "He plans to be in graduate school next year"; "The rebels had planned turmoil and confusion" (同)be after
make or work out a plan for; devise; "They contrived to murder their boss"; "design a new sales strategy"; "plan an attack" (同)project, contrive, design
putting seeds or young plants in the ground to grow; "the planting of corn is hard work"
the act of fixing firmly in place; "he ordered the planting of policemen outside every doorway"
a collection of plants (trees or shrubs or flowers) in a particular area; "the landscape architect suggested a small planting in the northwest corner"
A plant species that is first to colonize disturbed lands
A single-species ruderal community of Dittrichia viscosa on gravel near Petah Tikva-Sgula railway station, Israel. (Compare with mixed-species image below.)
A ruderal species is a plant species that is first to colonize disturbed lands. The disturbance may be natural – for example, wildfires or avalanches – or a consequence of human activity, such as construction (of roads, of buildings, mining, etc.) or agriculture (abandoned fields, irrigation, etc.).
The word ruderal comes from the Latin rudus rubble.
Ruderal species typically dominate the disturbed area for a few years, gradually losing the competition to other native species. However, in extreme disturbance circumstances, such as when the natural topsoil is covered with a foreign substance, a single-species ruderal community may become permanently established. In addition, some ruderal invasive species may have such a competitive advantage over the native species that they, too, may permanently prevent a disturbed area from returning to its original state despite natural topsoil.
Contents
1Features
2Quantification
3See also
4References
5External links
Features
Features contributing to a species' success as ruderal are:
Massive seed production
Seedlings whose nutritional requirements are modest
Fast-growing roots[citation needed]
Independence of mycorrhizae[citation needed]
Polyploidy
Quantification
Ecologists have proposed various scales for quantifying ruderality, which can be defined as the "ability to thrive where there is disturbance through partial or total destruction of plant biomass" (Grime, Hodgson & Hunt, 1988).[1] The ruderality scale of Grime presents values that are readily available, and it takes into account disturbance factors as well as other indicators such as the annual or perennial character of the plants.
See also
A mixed-species ruderal community on the side of Israel's road 40, north of the Yarkon River, where topsoil was left after the road-building activity.
Edge effect
Hemeroby
Pioneer species
Restoration ecology
Supertramp (ecology)
Examples of ruderal species:
Cannabis ruderalis (family Cannabaceae)
Conyza bonariensis (family Asteraceae)
Dittrichia viscosa (Asteraceae)
Nicotiana glauca (Solanaceae)
References
^Hill, M.O.; Roy, D.B.; Thompson, K. (2002). "Hemeroby, urbanity and ruderality: bioindicators of disturbance and human impact". Journal of Applied Ecology. 39 (5): 708–720. doi:10.1046/j.1365-2664.2002.00746.x.
External links
Media related to Ruderal species at Wikimedia Commons
St. John TV. 1987. SOIL DISTURBANCE AND THE MINERAL NUTRITION OF NATIVE PLANTS in Proceedings of the 2nd Native Plant Revegetation Symposium
Chapin. FS. III. 1980. The mineral nutrition of wild plants. Annu. Rev. Ecol. Syst., 11:233-260.
"Ruderal" . Encyclopædia Britannica. 23 (11th ed.). 1911. p. 814.
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