  Ecological systems have a high level of complexity combined with stability
and rich biodiversity. Recently, the analysis of their properties and evolution
has been pushed forward on a basis of concept of mutualistic networks that
provides a detailed understanding of their features being linked to a high
nestedness of these networks. It was shown that the nestedness architecture of
mutualistic networks of plants and their pollinators minimizes competition and
increases biodiversity. Here, using the United Nations COMTRADE database for
years 1962 - 2009, we show that a similar ecological analysis gives a valuable
description of the world trade. In fact the countries and trade products are
analogous to plants and pollinators, and the whole trade network is
characterized by a low nestedness temperature which is typical for the
ecological networks. This approach provides new mutualistic features of the
world trade highlighting new significance of countries and trade products for
the world trade.
