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Couto Misto (Portuguese: Couto Misto [ˈkotu ˈmiʃtu]; Galician: Couto Mixto; Spanish: Coto Mixto) was an independent microstate on the border between Spain and Portugal. It comprised the villages of Santiago de Rubiás, Rubiás (now in the Spanish municipality of Calvos de Randín), and Meaus (now in the Spanish municipality of Baltar), all in the Salas Valley, Ourense, Galicia.
(The scale bar is 1 m.) Ecosystem ecology is the "study of the interactions between organisms and their environment as an integrated system". [2]: 458 The size of ecosystems can range up to ten orders of magnitude, from the surface layers of rocks to the surface of the planet. [4]: 6
Urban ecology is a relatively new field. Because of this, the research that has been done in this field has yet to become extensive. While there is still plenty of time for growth in the research of this field, there are some key issues and biases within the current research that still need to be addressed.
The two main types of aquatic ecosystems are marine ecosystems and freshwater ecosystems. [1] Freshwater ecosystems may be lentic (slow moving water, including pools , ponds , and lakes ); lotic (faster moving water, for example streams and rivers ); and wetlands (areas where the soil is saturated or inundated for at least part of the time).