Complex sentence: Gallery Evergreen Forests along permanent watercourses where humidity is high and the soil perpetually moist are often categorized under Dry Evergreen Forests, but are particularly important to the sanctuary's fauna.
Split into simpler sentences: Gallery Evergreen forests occur along permanent watercourses, where humidity is high and the soil perpetually moist. They are often categorized under Dry Evergreen forests, but are particularly important to the sanctuary's fauna.