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Portugal as a whole is an important stopover for migratory bird species: the southern marshes of the eastern Algarve (Ria Formosa, Castro Marim) and the Lisbon Region (Tagus Estuary, Sado Estuary) hosting various aquatic bird species, the Bonelli's eagle and Egyptian vulture on the northern valleys of the Douro International, the black stork ...
The Protected areas of Portugal (Portuguese: Áreas protegidas de Portugal) are classified under a legal protection statute that allows for the adequate protection and maintenance of biodiversity, while providing services for ecosystem that maintains the natural and geological patrimony.
The following is a list of ecoregions in Portugal, including the Azores and Madeira, according to the Worldwide Fund for Nature (WWF). Terrestrial ecoregions [ edit ]
An ecological pyramid (also trophic pyramid, Eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bioproductivity at each trophic level in an ecosystem. A pyramid of energy shows how much energy is retained in the form of new biomass from each trophic level, while a pyramid ...
A food pyramid is a representation of the optimal number of servings to be eaten each day from each of the basic food groups. [2] The first pyramid was published in Sweden in 1974. [3] [4] [5] The 1992 pyramid introduced by the United States Department of Agriculture (USDA) was called the
At the site, 25 factories and 182 processing tanks were uncovered. [32] Ensemble of Álvaro Siza's Architecture Works in Portugal several sites 2017 i, ii, iv (cultural) This site comprises the works of the prominent Portuguese architect Álvaro Siza Vieira, winner of the 1992 Pritzker Architecture Prize, in Portugal. His work spans over 50 years.