Agriculture poses threat to Magoebaskloof biodiversity
Increased and more intensive agricultural activity is putting pressure on the area’s water supply and water quality, and is having a negative impact on the surrounding biodiversity
The Great Letaba Water Catchment in Magoebaskloof, which provides water to areas in Limpopo and Polokwane, and feeds the Kruger National Park all the way up to the Olifants River near the Mozambique border, is being threatened by increased agricultural activity in the area, eroding water and biodiversity.
Located in Limpopo, the water catchment – biodiverse land surrounding water bodies – consists of about 20 dams, which are the main source of irrigation for the agricultural sector in the region, as well as a source of domestic water, among other uses. However, the intensive farming has resulted in the overexploitation of the region, lowering water quality and deteriorating the surrounding biodiversity.
Dr Bronwyn Egan of the University of Limpopo’s biodiversity department told
DM168 that the area used to farm pine and gum, which required minimal irrigation. She added that the pine and gum plantations, which took up most of the grassland and some forest space, had since made way for more intensive agriculture such as avocado, blueberry and kiwi orchards.
“We need this livelihood [agriculture] as it’s really vital … it’s food and a basic need. But if we’re not going to do this carefully, we’re going to lose our water supply and the quality of water.
“The things that are worrying are the need to use fertiliser and chemicals and the silt load that’s going into the river,” said Egan.
The Woodbush Granite Grassland in the region was critically endangered, as less than 1% of its original state remained, with several plants, such as the red-hot poker, and the blue swallow having become extinct locally, said Egan.
Such biodiversity around the catchment plays an important role in soil retention, water purification in the catchment and carbon sinks in the ecosystem. Indigenous vegetation for the region is also vital in the light of a changing climate owing to its robust and resilient nature compared with monoculture crops.
Limpopo’s main economic streams are agriculture and tourism, which are vital for livelihoods, but they can also end up disrupting this environment.
Megan Baragwanath, chairperson of civic organisation Mountain Environmental
Watch (MEW), told DM168 that the mechanisation and industrialisation of agriculture in and around the Letaba catchment area resulted in the unlawful use of water from the catchment.
“The system has almost collapsed; it’s very difficult and expensive to go through the process of obtaining a water-use licence. There are problems within the whole process, which doesn’t help the system or anybody. Because it’s a system failure, an abuse of the system started taking place, which was worrying for us,” Baragwanath said, adding that the issue came to her organisation’s attention during a seven-year drought.
The chairperson added that, beyond unlawful water use, river buffer zones and protected grasslands were being ploughed, and indigenous forests were being mowed down to make room for new crops.
Baragwanath added that engagement with the Department of Water and Sanitation, and the Department of Forestry, Fisheries and the Environment, as well as engagement at a provincial level, yielded no fruit in addressing the agricultural practices that were degrading the biodiversity.
MEW started having conversations with the farmers and engaging all stakeholders about the harm that their agricultural practices cause to the catchment and biodiversity, with the involvement of the community. The organisation is also looking at how farmers can conserve and/or restore identified land, increase biodiversity and create corridors that link the identified pieces of land around the catchment.
Magoebaskloof ecotourism operator Lisa Martus said the increased agriculture, which also has an effect on water pollution and thus the water quality of the catchment, was detrimental to tourism not only in the area but also globally.
“I think, though, that these problems [increased agricultural activity, water pollution] translate specifically to Magoebaskloof as what has always been considered a pristine nature environment. And that is the appeal to tourists – that we have crystal-clear waters, beautiful streams running through mountains trickling through indigenous forests, rock pools,” Martus told DM168.
With agricultural activity moving closer to the rivers causing issues with water supply, the reality of healthy, crystal-clear waters was being jeopardised, and the need to protect the catchment area was becoming ever more important, Martus said.
Nicholas Theron, senior programme manager of the Kruger to Canyons biosphere organisation, told
that the work they do aims to promote a sustainable relationship between nature, its resources and development.
“We implement a number of different projects, but catchment areas are a priority.
“The reasons are obvious: they are generally important for biodiversity and for people, as they can extract natural resources out of those areas … for carbon sinks … and water,” Theron said.
Those extracting from the catchment areas include about 2,500 zama zamas (informal miners) who dig for gold in the region, leaving an ecological footprint and further degrading the catchment area.
Said Theron: “[We need to] do something now to protect [these catchment areas]; the impacts are irreversible and frightening. There really needs to be some focus as to what’s going on.”