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The range of values of each VI metric is divided into four intervals, giving the potential number of 4x4x4=64 EFTs. Each EFT is assigned a code of two letters and a number (three characters). The first letter of the code (capital) corresponds to the VI_Mean level, ranging from A to D for low to high (increasing) VI_Mean or productivity.
Culcitium sp. in Páramo de Chiles, Carchi, Ecuador.. Páramo climates differ slightly depending on the specific location. In Colombia and northern Ecuador, air masses from the Intertropical Convergence Zone (ITCZ) have a substantial effect on the climate, and these regions tend to be consistently humid (approx. 70–85%) [2] throughout the year.
The concept of Digital Business Ecosystem was put forward in 2002 by a group of European researchers and practitioners, including Francesco Nachira, Paolo Dini and Andrea Nicolai, who applied the general notion of digital ecosystems to model the process of adoption and development of ICT-based products and services in competitive, highly fragmented markets like the European one [8] [9].
The mean flow rate vector is based on the variability of friction with the bottom or sides of the channel, sinuosity, obstructions, and the incline gradient. [5] In addition, the amount of water input into the system from direct precipitation, snowmelt , and/or groundwater can affect the flow rate.
Marine waters cover more than 70% of the surface of the Earth and account for more than 97% of Earth's water supply [1] [2] and 90% of habitable space on Earth. [3] Seawater has an average salinity of 35 parts per thousand of water. Actual salinity varies among different marine ecosystems. [4]
At the dawn of the historic period, their successors were the Cochimi, foragers who exploited the natural resources of the coast, the inland plains, and the Sierra de San Francisco. Travelers trekking into this mountainous region can still see the natives' cave art. Spanish explorers arrived in the area in the 16th century.
Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries. [1] [2] [3]
The Amazon biome has an area of 6,700,000 square kilometres (2,600,000 sq mi). [2] [a] The biome roughly corresponds to the Amazon basin, but excludes areas of the Andes to the west and cerrado (savannah) to the south, and includes lands to the northeast extending to the Atlantic ocean with similar vegetation to the Amazon basin. [2]