Mat grass

One of several species of seaside grass, among which are the Lygeum Spar turn or hooded mat-weed of the Mediterranean and Anophilia Are-naria of Holland, The name Esparto is used for the fibers covering coconut shells. The dried weed may be nitrated to give an expl compd (see below)... 

The area around the place of destruction must be cleared of dry brush, grass, leaves and other combustible materials for a radius of 200ft. The destruction grounds should be of well-packed earth which is free from large stones and deep ctacks in which expl items might lodge. Expl materials shall not be burned or detonated on concrete mats... 

The body of Bess, Sale s Border collie, lay in the dry grass. It looked tir, its fiir dusty and matted. I batted away the flies that left it to inspect ny fiesher meat and turned away. But not before I d seen how the dog s head had been almost severed. 

A further series of hydroxyanthraquinones were isolated by Raistrick at the same time from Helminthosporium species. These organisms are found on cereals and grasses. When Helminthosporium gramineum, the causative organisms of a leaf stripe disease of barley, was grown on a Czapek-Dox medium it imparted a deep-red colour to the medium. Under some conditions the underside of the mycelial mat was partially covered with dark-red needle-shaped crystals. The main constituent was a trihydroxyanthraquinone, helminthosporin (7.8). Its structure was... 

In recent subtidal sands cemented layers commonly occur below a cover of loose sand. Wave and current reworking of the uppermost sand layer inhibits lithification, because the sand must be stable to permit cementation. Such a stable situation exists when deposition occurs only by periodic processes such as storms (Ginsburg, 1953), or when the surface layer is biogenically stabilized by sea grass meadows or algal mats (Davies Kinsey, 1973 Harris, 1978 Dravis, 1979). Otherwise, in places where sand is continually moved by waves or tidal currents, cementation takes place at a few... 

In other parts of the world, a synthetic grass mat has been used to collect current-borne sediments enabling a protective mat of sand to accumulate. In Boa Vista, Cape Verde Islands the natural seabed is composed of water-worn pebbles of volcanic rock. These are easy to handle underwater and a layer of 100 mm pebbles overlain with some well-chosen boulders protects the site from marine and human interference. The insertion of a short tail of orange cord serves as buried marker. It is discrete, moving gently in the current, and to the casual intruder is much like other marine growth and debris. 

Nole. Patch- (grass and various woody communities) and soil-specific SR rates measured monthly over an annual cycle at La Copita (McCulley, 1998) were multiplied by the area of respective commrmity types (Scanhui a]id Archer, 1991). Effects of mean annual temperature change (MAT, "C) on SR were estimated from (A) equations in Raich and Schlesinger (1992) for La Copita (MAT - 22.4°C and MAP - 720 mm) a. 0 and 6°C increase in MAT would produce a 3.9 and 7.8% increase, respectively, in soil respiration and (B) Q,o values of in sitti, community-specific soil respiration from McCulley (1998). Estimates are probably conservative, as respiration rates used in computations w ere measured during a below-normal rainfall year. 

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