has part ecoregion ecosystem ecological province An ecosystem which is of larger scale than an ecoregion and which includes smaller ecosystems determined by the presence of ecological assemblages that have at least some cohesion over evolutionary time frames. Assemblages within provinces will show endemism, principally at the level of species. While this may be partly explained by historical isolation, abiotic environmental features and coniditions will play a strong role. These may include geomorphological features (isolated island and shelf systems, semi-enclosed seas); hydrographic features (currents, upwellings, ice dynamics); or geochemical influences (broadest-scale elements of nutrient supply and salinity).” Examples include Cold Temperate Northeast Pacific, Tropical Northwestern Atlantic, and Cold Temperate Northeast Pacific.