For the botanist, a lawn is a plant formation consisting of herbaceous species of low height (barely exceeding 20-30 cm in height), mainly grasses, such as grasslands. Leaving the ground bare in places, it can sprinkled with rare small shrubs. They host a rich biodiversity and are home to many different plants, sometimes endemic or rare (lawn service Florida Keys).
The lawns have a rich biodiversity (up to 50 plant species per square meter). They are home to 26% of nationally protected plants and 30% of plant species recorded, as well as many rare insects. The disappearance of these major ecological interest imply the disappearance of species that live there. Orchids are emblematic species lawns.
When the structure of lawn is both due to poor soil and its exploitation by extensive grazing and / or mowing with export (hay), it is called agro-ecosystems. Extensive farming activities help maintain these environments or family environments called "surrogate". The plateaux in Massif Central are the typical example.
Most of these lawns exist naturally in presence of large wild herbivores. The aerohalines lawns are in immediate vicinity of sea, under the influence of wind and spray, even at high summer drought just above the rocks of foreshore or cliffs. Oligotrophic lawns located between 2,500 meters and about 3000 meters altitude in mountains. They tend to rise in sea level with global warming, as well as the forest floor above which they flourish.
This unmatched adaptability is supported by a huge morphological, physiological and reproductive diversity and several mutualistic partnerships with other agencies, converting grass into a fascinating family, not only for its economic importance, but also for its biological relevance.
Limbo (or sheet) is simple, usually linear, with parallel venation. Can flattened or sometimes rolled into a tube, may be continuous with the sheath or possess petiole. In addition to this description, it is necessary to address the variability that can found for each of these bodies: Profilo: the first sheet of each innovation is generally reduced to a membranous sheath, with two conspicuous fairings, without ligule or film which protects innovation. Pod: pod born into a knot and surrounds the rod and can shorter or longer than the internode. Often the sheath is split to base, although their edges overlap wrapping around the rod.
Their role was crucial to human activity as they allowed to feed livestock, especially sheep and goats. Other lawns of this type are born from the recent abandonment of vineyards. In this case, if man is not involved in their management, these environments naturally evolve into a forest stage through ecological succession. Many lawns have disappeared (overgrown, woody) abandoned for lack of profitability in early twentieth century. Since that time, 50 to 75% dry grasslands were perdues
In these cases there is usually longitudinally folded sheets (conduplicate they say) or (convoluted) are screwed. This feature is well illustrated by the first prefoliacion. It also lets you identify certain species. For example, sheets are typical conduplicate St. Augustine Grass, Bromus brevis, Dactylis glomerata, Axonopus compressus, Poa lanuginosa, among others. The convoluted leaves can seen in Lolium multiflorum, Bromus unioloides, Paspalum dilatatum, among many other examples. In some cases the sheet is modified becoming thick and subulate, and Sporobolus rigens.
The lawns have a rich biodiversity (up to 50 plant species per square meter). They are home to 26% of nationally protected plants and 30% of plant species recorded, as well as many rare insects. The disappearance of these major ecological interest imply the disappearance of species that live there. Orchids are emblematic species lawns.
When the structure of lawn is both due to poor soil and its exploitation by extensive grazing and / or mowing with export (hay), it is called agro-ecosystems. Extensive farming activities help maintain these environments or family environments called "surrogate". The plateaux in Massif Central are the typical example.
Most of these lawns exist naturally in presence of large wild herbivores. The aerohalines lawns are in immediate vicinity of sea, under the influence of wind and spray, even at high summer drought just above the rocks of foreshore or cliffs. Oligotrophic lawns located between 2,500 meters and about 3000 meters altitude in mountains. They tend to rise in sea level with global warming, as well as the forest floor above which they flourish.
This unmatched adaptability is supported by a huge morphological, physiological and reproductive diversity and several mutualistic partnerships with other agencies, converting grass into a fascinating family, not only for its economic importance, but also for its biological relevance.
Limbo (or sheet) is simple, usually linear, with parallel venation. Can flattened or sometimes rolled into a tube, may be continuous with the sheath or possess petiole. In addition to this description, it is necessary to address the variability that can found for each of these bodies: Profilo: the first sheet of each innovation is generally reduced to a membranous sheath, with two conspicuous fairings, without ligule or film which protects innovation. Pod: pod born into a knot and surrounds the rod and can shorter or longer than the internode. Often the sheath is split to base, although their edges overlap wrapping around the rod.
Their role was crucial to human activity as they allowed to feed livestock, especially sheep and goats. Other lawns of this type are born from the recent abandonment of vineyards. In this case, if man is not involved in their management, these environments naturally evolve into a forest stage through ecological succession. Many lawns have disappeared (overgrown, woody) abandoned for lack of profitability in early twentieth century. Since that time, 50 to 75% dry grasslands were perdues
In these cases there is usually longitudinally folded sheets (conduplicate they say) or (convoluted) are screwed. This feature is well illustrated by the first prefoliacion. It also lets you identify certain species. For example, sheets are typical conduplicate St. Augustine Grass, Bromus brevis, Dactylis glomerata, Axonopus compressus, Poa lanuginosa, among others. The convoluted leaves can seen in Lolium multiflorum, Bromus unioloides, Paspalum dilatatum, among many other examples. In some cases the sheet is modified becoming thick and subulate, and Sporobolus rigens.
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