• We are compiling ( or accumulating ) information on ...
• The greatest amount of information on ( or about ) ... has been gathered ( or amassed , or accumulated ) in temperate forests.
• We are compiling ( or accumulating ) information on ...
• The greatest amount of information on ( or about ) ... has been gathered ( or amassed , or accumulated ) in temperate forests.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012