Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

Hou, Dongjie; Guo, Ke; Changcheng, Liu

doi:10.1002/ece3.6591

Cited by 17 publications

(11 citation statements)

References 58 publications

(85 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our livestock density estimates in MKGR were 0.02 cattle ha −1 in moderately grazed hunting block and 0.05-0.10 cattle ha −1 in the intensively grazed hunting block. Our findings align with previous studies by [63,[63][64][65] who found grazing increased soil compaction and reduced the ability of water to enter the soil of Mongolia and Nigeria.…”

Section: Reduced Soil Infiltration and Penetration In Non-operational Wildlife Hunting Blockssupporting

confidence: 93%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

Section: Reduced Soil Infiltration and Penetration In Non-operational Wildlife Hunting Blockssupporting

confidence: 93%

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

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Total nitrogen (T-N) content was determined using the Kjeldahl Method ( Roth et al, 2014 ), while ammonium nitrogen content in a KCl (2 mol/L) extract was measured using the indophenol blue colorimetric method ( Ye et al, 2017 ). Total phosphorus (T-P) and available phosphorus (A-P) concentrations were measured using an UV-2700 ultraviolet spectrophotometer ( Hou et al, 2020 ), while the concentration of total potassium (T-K), total calcium (T-Ca), and total magnesium (T-Mg) were measured using flame photometry ( Mishra et al, 2020 ). Available iron (A-Fe), available manganese (A-Mn), and available zinc (A-Zn) were extracted with a solution containing nitric acid, hydrogen peroxide, and hydrofluoric acid in a 6:2:2 ratio.…”

Section: Methodsmentioning

confidence: 99%

Soil Microbial Communities Affect the Growth and Secondary Metabolite Accumulation in Bletilla striata (Thunb.) Rchb. f.

Xiao

Jiang

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

Bletilla striata (Thunb.) Rchb.f. is a perennial herb belonging to the Orchidaceae family. Its tubers are used in traditional Chinese medicine to treat gastric ulcers, inflammation, silicosis tuberculosis, and pneumogastric hemorrhage. It has been reported that different soil types can affect the growth of B. striata and the accumulation of secondary metabolites in its tubers, but the biological mechanisms underlying these effects remain unclear. In this study, we compared agronomic traits and the accumulation of secondary metabolites (extractum, polysaccharide, total phenol, militarine) in B. striata grown in sandy loam or sandy clay soil. In addition, we compared physicochemical properties and microbial communities between the two soil types. In pot experiments, we tested how irradiating soil or transplanting microbiota from clay or loam into soil affected B. striata growth and accumulation of secondary metabolites. The results showed that sandy loam and sandy clay soils differed significantly in their physicochemical properties as well as in the structure and composition of their microbial communities. Sandy loam soil had higher pH, SOM, SOC, T-Ca, T-N, T-Mg, T-Mn, T-Zn, A-Ca, A-Mn, and A-Cu than sandy clay soil, but significantly lower T-P, T-K, T-Fe, and A-P content. Sandy loam soil showed 7.32% less bacterial diversity based on the Shannon index, 19.59% less based on the Ace index, and 24.55% less based on the Chao index. The first two components of the PCoA explained 74.43% of the variation in the bacterial community (PC1 = 64.92%, PC2 = 9.51%). Similarly, the first two components of the PCoA explained 58.48% of the variation in the fungal community (PC1 = 43.67%, PC2 = 14.81%). The microbiome associated with sandy clay soil can promote the accumulation of militarine in B. striata tubers, but it inhibits the growth of B. striata. The accumulation of secondary metabolites such as militarine in B. striata was significantly higher in sandy clay than in sandy loam soil. Conversely, B. striata grew better in sandy loam soil. The microbiome associated with sandy loam soil can promote the growth of B. striata, but it reduces the accumulation of militarine in B. striata tubers. Pot experiment results further confirmed that the accumulation of secondary metabolites such as militarine was higher in soil transplanted with loam microbiota than in soil transplanted with clay microbiota. These results may help guide efforts to improve B. striata yield and its accumulation of specific secondary metabolites.

show abstract

“…Specifically, some microelements with essential biological functions (Marschner & Kalbitz 2003;Bowker 2006) are required in smaller amounts by plants (<100 mg•kg -1 dry weight; e.g., Cu, Fe, Mn, and Zn;DalCorso et al 2014). These elements are involved in plant metabolic processes (Hansch & Mendel 2009;Hou et al 2020b), regulate plant growth and physiological activity (DalCorso et al 2014;Hou et al 2020b), ensure the organic matter cycle, and maintain soil functionality (Memoli et al 2018). Moreover, they are also components of enzyme prosthetic groups that catalyze redox processes, form enzyme-substrate complexes, and enhance enzyme reactions (Radujkovic et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Initial responses of influential microbial taxa to metal elements lead to alterations in the forest soil microbial community structure and function

Wu,

Xing,

Wang

et al. 2022

Preprint

View full text Add to dashboard Cite

As primary drivers of underlying microbial changes, soil metals have been extensively studied in agroecosystems. However, while their contributions to forest soil microbial processes are crucial for maintaining tree biodiversity, they remain poorly understood. Based on the analysis of 1287 soil samples collected from a 20 ha forest plot, we show that seven metal elements (Al, Ca, Cu, Fe, Mg, Mn, and Zn) shape microbial community structure and function by initially altering influential microbial taxa. Microbial α-diversity and community structure responded differently to these elements at low vs. high C:N ratios, pH, and water content. Moreover, these elements also affected microbial functional guilds (e.g., phosphorus and sulfur metabolism, ectomycorrhizae, plant pathogens, and wood saprotrophs) via sensitive microbial taxa. This study advances our capacity to predict belowground microbial processes by revealing the fundamental importance of metals in forest soils, with important implications for better conserving forest biodiversity under global climate change.

show abstract

Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

Cited by 17 publications

References 58 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

Soil Microbial Communities Affect the Growth and Secondary Metabolite Accumulation in Bletilla striata (Thunb.) Rchb. f.

Initial responses of influential microbial taxa to metal elements lead to alterations in the forest soil microbial community structure and function

Contact Info

Product

Resources

About