Our proposal vs traditional decision environment


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Our proposal vs traditional decision environment

  1. 1. A flowchart for our proposalEcosystem dynamics and decision environment Natural habitataround the quarry is affected by landscape dynamics. Abandonment of forest management practices affects The disappearance of rain fed negatively the forest structure of the plantations P. of, agriculture leads to afforestation. pinea; P. pinaster and P. radiata. Afforestation reduces runoff, thus lowering stream water discharge and even interrupting streamflow. Net loss of biodiversity linked to open habitat disapperance Agricultural fauna and mostly ground nesting birds : Miliaria calandra, Athene noctua, Alauda arvensis, Natural temporal ponds disappear Oryctolagus cuniculus, Tymon lepidus, Bufo calamita.. except on quarries. The quarry activity involves modifications of landscapes. New landscapes varies The quarry asecosystem services provider from simple deforestation on preparation works, to profound modifications of the Quarry ponds become vistually the only relief and soil disappearance. The biodiversity linked to temporal suitable reproduction habitat for ponds becomes quarry biodiversity. natterjack toads (Bufo calamita). The extraction phase of the Barren soils, rocks and cliffs as new quarry can last several When local streams dry up on mid habitats decades. Time enough for summer, the ponds of the quarry establishing ecosystem become the only source of water. Opportunities for rock and cliff interchange with surrounding nesting species: B bubo, ubo habitats Monticola solitarius,.. Roe deer and other species visit the quarry for watering Pond formation on concavities and pond construction as Quarry areas with natural soil becomes a retention basins to prevent silt reserve on flowering herbs and shrubs, transport by runoff. and its pollinator invertebrate fauna. Presence of birds of preyButeo buteo, ( Circaetus gallicus. Quarry as hunting ) range. Soils developed from granite are easily excavated by rabbits. No human hunting area + palatable herbs abundance + easy den excavation = rabbit abundance.Conventional decision environment Environmental consequences of prevailing dogmas Restoration projects ignoring the ecological interactions of the quarry Impact on Frequent erosion problems Loss of quarry habitat during the extraction phase. Natterjack toad on attempts to restore habitats populations vegetation on slopes over 15% Aesthetic landscape management restricted to mimicking the pre- existing situation. Landscape visual Rabbit The camouflage landscape objective treatment = camouflage? population rarely accomplished as it is difficult to decline grow xenophile vegetation on reconstructed hillsides, and so the The recuperation of previous relief cover of vegetation is much lower. is the main objective. Proposal for an integrated management approach Restoration projects Why not to try must be a consequence to "sculpture" of the ecosystem stable natural dynamics during the looking cliffs? extraction phase. Implement the biodiversity GIS analysis use to optimize management plans during the useful extraction volume. Optimize extraction phase taking into account quarry production on ecological the ecosystem services that the quarry grounds is not a sin! habitat provides to the surrounding natural landscapes.