Simulating soil organic C dynamics in managed grasslands under
humid temperate climatic conditions

Jebari, Asma; Álvaro‐Fuentes, Jorge; Pardo, Guillermo Orozco; Almagro, María; Prado, Agustín del

doi:10.5194/soil-2020-76

Cited by 2 publications

(2 citation statements)

References 60 publications

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“…The MKGR is a wetland reserve with black cotton soil [54,55], which strongly favors pugging and poaching [52]. Soil pugging and poaching can damage and even bury plants [56], hinder vegetation productivity [57] and increase the soil's resistance to return to its normal conditions [56]. Our findings that the negative effect triggered by grazing increased with wetness corresponds with previous studies by [58,59].…”

Section: Low Grass Biomass and Cover In Non-operational Wildlife Hunting Blockssupporting

confidence: 87%

Using Trophy Hunting to Save Wildlife Foraging Resources: A Case Study from Moyowosi-Kigosi Game Reserves, Tanzania

et al. 2022

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Globally, the role of trophy hunting in wildlife conservation has been a topic of much debate. While various studies have focused on the financial contribution of trophy hunting towards wildlife conservation, little is known about whether hunting activities can protect wildlife forage resources. We examined the effect of illegal livestock grazing on wildlife habitat in operational and non-operational wildlife hunting blocks in Moyowosi-Kigosi Game Reserves (MKGR), Tanzania. We assessed whether the physical presence of hunting activities lowered illegal grazing and, thus, led to higher vegetation quality. We compared 324 samples of above-ground biomass (AGB) and grass cover between control (0.0007 cattle ha−1), moderately (0.02 cattle ha−1), and intensively (0.05 to 0.1 cattle ha−1) grazed hunting blocks. Likewise, we assessed soil infiltration, soil penetration, soil organic carbon (SOC), and soil Nitrogen, Phosphorus, and Potassium (N-P-K) across grazing intensity. Illegal grazing decreased AGB by 55%, grass cover by 36%, soil penetration by 46%, and infiltration rate by 63% compared to the control blocks. Illegal grazing further lowered SOC by 28% (F2,33 = 8, p < 0.002) but increased soil N by 50% (F2,33 = 32.2, p < 0.001) and soil K by 56% (H (2) = 23.9, p < 0.001), while soil P remained stable. We further examined if Hunting Company (HC) complements anti-poaching efforts in the Game Reserves (GR). We found that HC contributes an average of 347 worker-days−1 for patrol efforts, which is 49% more than the patrol efforts conducted by the GR. However, patrol success is higher for GR than HC (F1,21 = 116, p < 0.001), due to constant surveillance by HC, illegal herders avoided invading their hunting blocks. We conclude that illegal grazing severely reduced vegetation and soil quality in MKGR. We further claim that trophy hunting contributes directly to wildlife habitat preservation by deploying constant surveillance and preventing illegal grazing. We propose maintaining trophy hunting as an essential ecological tool in wildlife conservation.

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Section: Low Grass Biomass and Cover In Non-operational Wildlife Hunting Blockssupporting

confidence: 87%

Using Trophy Hunting to Save Wildlife Foraging Resources: A Case Study from Moyowosi-Kigosi Game Reserves, Tanzania

et al. 2022

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“…The MKGR is a wetland reserve with black cotton soil (Erftemeijer, 2001;Hashmie et al, 2020), which strongly favors pugging and poaching (Bilotta et al, 2007). Soil pugging and poaching can damage and even bury plants (Tuohy et al, 2015), hinder vegetation productivity (Jebari et al, 2020) and increase the soil's resistance to return to its normal conditions (Tuohy et al, 2015). The findings that the negative effect triggered by grazing increased with wetness corresponds with previous studies by Munjonji et al (2020) and Sumiya et al (2017).…”

Section: Boundarysupporting

confidence: 79%

Impact of illegal livestock grazing on the socio-ecologica role of trophy hunting: the case of Moyowosi Kigosi game reserve, Tanzania

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Tanzania has set aside almost 40% of its land for conservation and trophy hunting is the main activity conducted in an area covering about 80% of Tanzania’s conserved land. Trophy hunting conserves wildlife inside and outside Protected Areas (PAs) and provides socio-economic incentives for communities to conserve wildlife. Despite its importance, hunting companies surrendered 45% of Tanzania’s hunting blocks to the government mainly due to habitat destruction mediated by illegal livestock grazing. Unfortunately, there is no empirical information on how illegal grazing affects trophy hunting. Therefore, the impact of illegal grazing on the socio-ecological role of trophy hunting was examined using Moyowosi - Kigosi Game Reserve (MKGR) as a case study. The study investigated whether the physical presence of trophy hunting deters illegal grazing, improves wildlife habitats, and diversifies rural income. Field experiments, laboratory work, questionnaires, and official records from MKGR were used in this study. The study revealed that illegal grazing persisted in MKGR over three decades (1990 – 2019). It destructed wildlife habitats, reduced forages, enhanced soil compaction, increased human activities in the hunting blocks, and caused hunting blocks to lose their economic viability. Also, there is a higher dietary overlap between buffalo and livestock, buffalo density decreased in invaded areas and buffalo deployed spatial partitioning of about 5 km to avoid livestock. The study confirmed that indeed, trophy hunting plays an important socio-ecological role within and outside protected areas. If affected, it will compromise the multiple socio-economic benefits often gained by the local communities. The ecological role of trophy hunting in conserving grass biomass and cover, enhancing soil infiltration and penetration by preventing illegal grazing as observed in operational hunting blocks is also apparent. The study recommends the MKGR address illegal grazing at the hotspot areas and should conduct studies on areas outside the reserve that could be re-seeded with grass species preferred by herders. The MKGR should establish awareness campaigns on the impact of illegal grazing and develop a restoration plan to enhance soil nutrients, support herbaceous cover, and diversify wildlife species to boost ecosystem functioning and prevent further deterioration of this globally important Ramsar site in Tanzania.

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Simulating soil organic C dynamics in managed grasslands under humid temperate climatic conditions

Cited by 2 publications

References 60 publications

Using Trophy Hunting to Save Wildlife Foraging Resources: A Case Study from Moyowosi-Kigosi Game Reserves, Tanzania

Using Trophy Hunting to Save Wildlife Foraging Resources: A Case Study from Moyowosi-Kigosi Game Reserves, Tanzania

Impact of illegal livestock grazing on the socio-ecologica role of trophy hunting: the case of Moyowosi Kigosi game reserve, Tanzania

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