water ferns造句

• The water hyacinth and water fern could modify the native ecosystem.
• Common eucalyptus species include pinkwood, hard water fern and soft tree fern.
• The introduced water fern " Azolla filiculoides " is widespread throughout.
• It can also be isolated from the fresh water fern " Salvinia molesta ".
• Invigorate house plants : Water ferns and other houseplants once a week with a weak, tepid brewed tea.
• A water fern of low wildlife utilisation value, the salvinia is later transported to a suitable site for composting.
• It is commonly known as water sprite, Indian fern, water fern, oriental waterfern, and water hornfern.
• Giant water fern ( " Salvinia molesta " ) is one of the world's worst aquatic weeds.
• This water fern is often grown as an ornamental plant but has escaped and become a noxious pest in many regions worldwide.
• At one time some workers believed the water ferns ( order Salviniales ) to be allied to this order because of certain structural similarities, but modern cladistic studies have ruled out any special alliance.
• The single living species, " "'Regnellidium diphyllum " "', the two-leaf water fern, is native to southeastern Brazil and adjacent regions of Argentina.
• Tuan s 30 experiments involved observing Vietnam from space, life sciences ( including tests of growth of Vietnamese azolla water ferns, with application to future closed-loop life support systems ), and materials processing.
• Studies of fish from warmwater streams shows a preponderance of algae in the stomach ( 60-80 % ), and they are also known to feed on the roots of " Azolla " ( floating water ferns ).
• Floating plants can absorb and filter heavy metals . " Eichhornia crassipes " ( water hyacinth ), " Lemna " ( duckweed ) and " Azolla " ( water fern ) store iron and copper commonly found in wastewater.
• In assessing the current biodiversity status in the country, the DENR cited exotic species that were introduced at various times in Philippine waters : the giant catfish, black bass, white goby, marine toad, American Bullfrog, Leopard Frog, Golden apple snail, water hyacinth, and water fern.
• Fern diversity decreases, as a result, because of the decrease in light from the understorey . " Blechnum wattsii " ( hard water fern ) is the main ground fern; it prefers damp shaded areas and forms a very dense layer in some areas but can be absent in others.
• Two particular members of the genus are often grown as immersed water plants in aquaria, " B . heudelotii ", and " B . heteroclita " . " B . heudelotii ", the African water fern, normally grows submerged in its native habitat, while " B . heteroclita " normally grows on the margin of water bodies, but will also grow submerged.
• Blue green algae belonging to a general cyanobacteria genus, " Nostoc " or " Anabaena " or " Tolypothrix " or " Aulosira ", fix atmospheric nitrogen and are used as inoculations for paddy crop grown both under upland and low-land conditions . " Anabaena " in association with water fern Azolla contributes nitrogen up to 60 kg / ha / season and also enriches soils with organic matter.