Kanovlei

Kanovlei State Forest lies in Namibia's Otjozondjupa Region, about 150 km east of Grootfontein ^[1]. The World Database on Protected Areas records it as a state forest of about 216 km2 managed by the Ministry of Environment, Forestry and Tourism ^[2], and a 2021 vegetation study gives its area as 21,636 hectares ^[1]. It is one of Namibia's three state forests, alongside Hamoye (listed in that database as Hamweyi) in Kavango East and the Zambezi State Forest in the Zambezi Region (https://www.protectedplanet.net/555766109; https://www.protectedplanet.net/555766110; https://www.protectedplanet.net/7442). A field station of the National Forestry Research Centre is situated next to the forest ^[3]. The forest protects Kalahari sand woodland in which eight vegetation structure classes have been mapped, and a 2021 study describes human activity in the area as limited ^[1]. A 2023 national baseline study noted that the three state forests had not yet been formally declared ^[3].

The woodland and omuramba habitats of Kanovlei support wildlife that, together with people, has had little impact on the forest's vegetation resources. ^[1] Small mammals are active enough to matter for forestry: in a direct-seeding and enrichment-planting experiment at Kanovlei, all planted nursery seedlings were destroyed by small mammals within six weeks unless protected by individual sleeves. ^[2]

Eight vegetation structure classes were mapped in Kanovlei in 2010 from satellite imagery and field plots: closed woodland, dense shrubland, mixed grass and shrubland, mixed shrubland, mixed shrubland and woodland, open woodland, shrubland and woodland. Closed woodland, woodland and shrubland cover most of the forest, and no grassland areas were found. ^[1] The dominant woody species are Pterocarpus angolensis (kiaat) and Burkea africana. Kiaat is found mostly in the west of the forest and Burkea dominates the east. Along the dry drainage lines and valleys Acacia species, Burkea africana and Terminalia sericea dominate, while a few areas are dominated by Bauhinia petersiana and Combretum species. ^[1] Soil and vegetation are closely linked: Terminalia sericea is normally found on sandy soils, while thorny plants such as Acacia species and Ziziphus mucronata grow mainly on sandy loam. ^[1]

Kanovlei lies within the Kalahari Acacia-Baikiaea woodland type, a transition zone between the Zambezian Baikiaea woodlands to the north and the Acacia shrublands to the south. This woodland type grows on Kalahari sand with longitudinal east-west dunes that have been eroded to less than 10 m high, although the remnants of the dune fields are still visible in satellite images. ^[1] Within Kanovlei itself most of the ground is sandy soil, with small areas of sandy loam along the main omuramba, as the region's dry drainage valleys are known. ^[2] Namibia's Kalahari sand soils are low in nutrients and especially deficient in phosphorus. ^[1]

Mean annual rainfall at Kanovlei is about 478 mm. ^[1] Like all of Namibia's forests and woodlands, the area has three seasons: a cold dry season from May to August, a hot dry season from September to December and a relatively wet season from January to April. Winter frost occurs in many of these woodland areas, while summer daytime temperatures can rise above 35 degrees Celsius. ^[2]

Kanovlei sits in the Kalahari Acacia-Baikiaea woodland type, which also contains community forests such as M'kata and Nyae Nyae ^[1]. The state forest overlaps the Na Jaqna Communal Conservancy and the Na Jaqna Community Forest, areas managed by local communities (https://www.protectedplanet.net/555542935; https://www.protectedplanet.net/555782780). A 2021 study of the forest notes that people and wildlife have had little impact on its vegetation resources, which is why a vegetation map made in 2010 was still considered a usable baseline more than ten years later ^[2].

Kanovlei has served as a protected reserve for more than 20 years, according to a 2021 vegetation study. ^[1] It is managed by the Directorate of Forestry, which was incorporated into the Ministry of Environment, Forestry and Tourism in 2020. ^[2] The forest's research station is one of three field stations run by the National Forestry Research Centre in Okahandja, and the centre maintains a fire trial at Kanovlei. A permanent sample plot was established at the station in 2006 by the Namibia University of Science and Technology and first remeasured from 2021. ^[2] Kanovlei is also one of four sites in a 2023 woodland-monitoring network of 23 one-hectare plots, which re-established the three plots the university first set up in 2006. ^[3]

Kanovlei is known chiefly as a forestry research and monitoring site rather than as a visitor attraction. Its main features are the mapped woodland mosaic, the kiaat-dominated western part of the forest and the dry omurimba valleys that cut through it. ^[1] The forest hosts experimental work including a fire trial and a seedling-planting experiment on kiaat, Zambezi teak and false mopane. ^[2]

Kanovlei lies about 150 km east of Grootfontein in Otjozondjupa. ^[1] The Directorate of Forestry manages Namibia's state forest reserves, so it is the body to contact about access. ^[2]

Timber is the main woodland resource that is illegally harvested in Namibia's forests ^[1]. Kiaat, one of Kanovlei's two dominant woody species and found mostly in the western part of the forest ^[2], is one of the most valuable timber species in southern Africa ^[3]. Fires occur regularly in Namibia's forests, and on average 7 percent of the country's land area burned each year between 2003 and 2012 ^[1]. A long-term fire experiment in northern Namibia found that mid- to late dry season fires cause significantly higher stem mortality than early burning or no burning, and the Directorate of Forestry's research division maintains a fire trial at Kanovlei ^[1]. Northern Namibia is projected to become warmer and drier, which is expected to raise fire frequency, and a 2023 national assessment warned that the state forests are not legally protected until they are formally proclaimed ^[1]. Kanovlei's vegetation has so far been little affected by people, and the 2010 vegetation map is recommended as a baseline for monitoring the effects of conservation and other land uses ^[2].