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Plant community response to loss of large herbivores differs between North American and South African savanna grasslands.
(Ecological Society of America; https://www.esa.org/esa/, 2014-04-01)
Herbivory and fire shape plant community structure in grass‐dominated ecosystems, but these disturbance regimes are being altered around the world. To assess the consequences of such alterations, we excluded large herbivores ...
Flood variation and soil nutrient content in floodplain vegetation communities in the Okavango Delta
(South African Journal of Science; http://www.scielo.org.za, 2014-02)
We investigated the influence of hydroperiod variation on soil nutrient content in the Okavango Delta seasonal floodplains. Soil samples were collected from eight zones of homogenous vegetation cover after low and high ...
Remote sensing-derived hydroperiod as a predictor of floodplain vegetation composition
(Springer Link; https://link.springer.com, 2014-02-13)
Characterising hydroperiod and vegetation for flood-pulsed wetlands is a critical first step towards understanding their ecology. In large, data-poor wetlands such as Botswana’s Okavango Delta, quantifying hydrology and ...
Tree–grass competition along a catenal gradient in a mesic grassland, South Africa
(Wiley Online Library; https://onlinelibrary.wiley.com, 2014-03-03)
The interaction, both above and belowground, between tree saplings and the
surrounding grass sward is dependent on solar radiation, temperature, rainfall,
soil depth, tree species and sward composition. These factors, ...
Influence of flooding variation on Molapo farming field size in the Okavango Delta, Botswana
(International Journal of Agricultural Research and Review; http://www.springjournals.net/ijarr, 2014-02)
In the Okavango Delta of Botswana, flood recession farming (molapo farming) contributes substantially to rural livelihoods by providing better yields than rain-fed dry land farming. However, molapo farming communities ...
Classical fisheries theory and inland (floodplain) fisheries management; is there need for a paradigm shift? lessons from the Okavango Delta, Botswana
(Fisheries and Aquaculture Journal; https://www.omicsonline.org, 2014-07-29)
This paper reviews the fisheries management question of inland (floodplain) systems in the developing world and proposes a paradigm shift in approach. Inland fisheries management is largely based on classical fisheries ...
Soil microbial biomass carbon, nitrogen and sulphur as affected by different land uses in Seronga, Okavango Delta, Botswana
(Sciencedomain international; www.sciencedomain.org, 2014-02-06)
Aim: The Okavango Delta at Seronga is fragmented into different land uses ranging from grasslands to woodland (Ximenia and mopane), often punctuated with cropped and fallow fields. The influence of land uses on surface (A1 ...
Tracing silicon cycling in the Okavango Delta, a sub-tropical flood-pulse wetland using silicon isotopes
(Elservier, https://www.elsevier.com, 2014-07-22)
Chemical weathering of silicate minerals releases elements into solution whereas the neoformation of secondary minerals works in the opposite direction, potentially confounding estimates of silicate weathering rates. Silicon ...
Abiotic and biotic factors influencing the mobility of arsenic in groundwater of a through-flow island in the Okavango Delta, Botswana
(Elsevier, https://www.elsevier.com, 2014-10-10)
The Okavango Delta of Botswana is a large arid-zone wetland comprising 20,000 km2 of permanent and seasonal floodplains and over 100,000 islands. It has been shown that island groundwater can have very high dissolved arsenic ...
Okavango Delta – A Kalahari oasis under environmental threats
(Omics International, https://www.omicsonline.org, 2014-10-15)
Wetlands all over the world are continuously faced with enormous environmental threats. The Okavango, a Kalahari hotspot, is not an exception. This research article provides a description of the environmental threats facing ...