[3] Around Lake Kanzigiri there are wooded savannahs dominated by plants such as Pericopsis angolensis, Parinari curatellifolia and Hymenocardia acida, which indicate Zambezian influences.

When the flood recedes, between June and August, Lake Rweru flows towards the Nyabarongo River over the swamp, and later through a single channel.

The United Nations Food and Agriculture Organization (FAO) had developed buffer zones around each of these marshes.

[7] Excessive fishing and the introduction of invasive plants also threaten the lake's ecosystem.

[9] The lake was part of the Lacs du Nord Aquatic Landscape Protected Area that was created in 2006.