Impacts of heat stress on global cattle production during the 21st century: a modelling study

Thornton, Philip K.; Nelson, Gerald C.; Mayberry, Dianne; Herrero, Mario

doi:10.1016/s2542-5196(22)00002-x

Cited by 100 publications

(64 citation statements)

References 29 publications

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“…Furthermore, long exposure time in the high temperature and humidity environment endangered the physiological ability to regulate temperature, which would be accompanied by a series of changes in physiological functions ( Kadzere et al, 2002 ). Heat stress increases respiration and mortality, reduces fertility, modifies animal behavior, and suppresses the immune and endocrine systems ( Thornton et al, 2022 ). Also, heat stress reduces total volatile fatty acid (VFA) production and leads to changes in rumen pH, and the passage rate and retention time of chyme are also affected by elevated ambient temperature, thereby affecting digestibility ( Yadav et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Rumen fermentative metabolomic and blood insights into the effect of yeast culture supplement on growing bulls under heat stress conditions

Zhang

Liang²,

Xu³

et al. 2022

Front. Microbiol.

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This study was conducted to investigate the effects of yeast culture supplements on the physiological state and growth performance of growing bulls under heat stress conditions and the underlying mechanism. A total of 14 (6.0 ± 1.0 months old) growing bulls with similar body weight were randomly assigned into the control group (YC0g/d) and yeast culture supplement group (YC40g/d). YC0g/d contained three replicates, with two bulls in each replicate, which were fed a basal diet. Meanwhile, the YC40g/d treatment contained four replicates, with two bulls in each replicate, which were fed a basal diet supplemented with 40 g/day of yeast culture per cattle. Growth performance, nutrient digestibility, rumen fermentable metabolites, serum immunity, serum hormones, and serum antioxidant parameters were measured. Results showed that the average daily gain significantly increased (P < 0.05), while the feed-to-gain ratio significantly decreased (P < 0.01) after YC supplementation compared with the YC0g/d. The digestibility of neutral detergent fiber (P < 0.05) was higher in YC40g/d. There were no significant differences in ruminal pH, NH3-N, butyrate, or acetate/propionate (P > 0.05). Besides, the rumen MCP, acetate, propionate, and total VFA content remarkably increased with the supplement of YC (P < 0.05). Yeast culture supplementation increased the concentration of nicotinamide riboside, neuromedin B, peptides, and formyl-5-hydroxykynurenamine. The YC40g/d group had a significantly (P < 0.05) higher serum triiodothyronine level, serum glutathione peroxidase levels, and total antioxidant capacity while having a lower serum malondialdehyde level than the YC0g/d group. In conclusion, the addition of yeast culture in the diet improves the growth performance of growing bulls under heat stress by increasing nutrient digestibility, rumen fermentation function, antioxidant capacity, and rumen metabolites.

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Section: Introductionmentioning

confidence: 99%

Rumen fermentative metabolomic and blood insights into the effect of yeast culture supplement on growing bulls under heat stress conditions

Zhang

Liang²,

Xu³

et al. 2022

Front. Microbiol.

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“…Heat stress is becoming increasingly relevant in livestock agriculture as many regions around the globe are experiencing higher than historical average temperatures ( Rossati, 2017 ). These heat stress events have been shown to greatly impact many aspects of production, including animal performance, health, and efficiency ( Silanikove, 2000 ; St-Pierre et al, 2003 ; Nonaka et al, 2008 ; Bishop-Williams et al, 2015 ; Brown-Brandl, 2018 ; Menta et al, 2022 ; Thornton et al, 2022 ). The results presented in this manuscript describe microbial community structure and composition within two separate rumen microbial communities, rumen content microbiota, and rumen epithelial microbiota, in relation to supplementation of Sucram, a sodium-saccharin based sweetener, during a heat stress event.…”

Section: Discussionmentioning

confidence: 99%

Influence of a sodium-saccharin sweetener on the rumen content and rumen epithelium microbiota in dairy cattle during heat stress

Koester

Hayman

Anderson

et al. 2022

Journal of Animal Science

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The effect of a saccharin-based artificial sweetener was tested on animal performance measures and on the microbial communities associated with the rumen content and with the rumen epithelium during heat stress. Ten cannulated Holstein-Friesian milking dairy cattle were supplemented with 2 grams of saccharin-based sweetener per day, top-dressed into individual feeders for a 7-day adaptation period followed by a 14-day heat stress period. A control group of ten additional cows subjected to the same environmental conditions but not supplemented with sweetener were included for comparison. 16S rRNA gene amplicon sequencing was performed on rumen content and rumen epithelium samples from all animals, and comparisons of rumen content microbiota and rumen epithelial microbiota were made between supplemented and control populations. Supplementation of the saccharin-based sweetener did not affect the rumen content microbiota, but differences in the rumen epithelial microbiota beta-diversity (PERMANOVA, P = 0.003, R 2 = 0.12) and alpha-diversity (Chao species richness, P = 0.06 and Shannon diversity, P = 0.034) were detected between the supplemented and control experimental groups. Despite the changes detected in the microbial community, animal performance metrics including feed intake, milk yield, and short-chain fatty acid (acetic, propionic, and butyric acid) concentrations were not different between experimental groups. Thus, under the conditions applied, supplementation with a saccharin-based sweetener does not appear to affect animal performance under heat stress. Additionally, we detected differences in the rumen epithelial microbiota due to heat stress when comparing initial, pre-stressed microbial communities to the communities after heat stress. Importantly, the changes occurring in the rumen epithelial microbiota may have implications on barrier integrity, oxygen scavenging, and urease activity. This research adds insight into the impact of saccharin-based sweeteners on the rumen microbiota and the responsivity of the rumen epithelial microbiota to different stimuli, providing novel hypotheses for future research.

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“…However, beef cattle compensate for increased body temperature by natural homeostatic mechanisms such as urination, panting, and sweating and various behavioral modifications which include decreased activities, enhanced water intake, and limited feed intake ( Summer et al, 2019 ). Hence, it is concluded that at temperature changes especially higher than an animal’s thermoneutral range can significantly impact liveweight gain, milk and meat production, and also animal’s fertility ( Thornton et al, 2022 ).…”

Section: Climate Change Impacts On Key Components Of Food Securitymentioning

confidence: 99%

Uncovering the Research Gaps to Alleviate the Negative Impacts of Climate Change on Food Security: A Review

Uzair²,

et al. 2022

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Climatic variability has been acquiring an extensive consideration due to its widespread ability to impact food production and livelihoods. Climate change has the potential to intersperse global approaches in alleviating hunger and undernutrition. It is hypothesized that climate shifts bring substantial negative impacts on food production systems, thereby intimidating food security. Vast developments have been made addressing the global climate change, undernourishment, and hunger for the last few decades, partly due to the increase in food productivity through augmented agricultural managements. However, the growing population has increased the demand for food, putting pressure on food systems. Moreover, the potential climate change impacts are still unclear more obviously at the regional scales. Climate change is expected to boost food insecurity challenges in areas already vulnerable to climate change. Human-induced climate change is expected to impact food quality, quantity, and potentiality to dispense it equitably. Global capabilities to ascertain the food security and nutritional reasonableness facing expeditious shifts in biophysical conditions are likely to be the main factors determining the level of global disease incidence. It can be apprehended that all food security components (mainly food access and utilization) likely be under indirect effect via pledged impacts on ménage, incomes, and damages to health. The corroboration supports the dire need for huge focused investments in mitigation and adaptation measures to have sustainable, climate-smart, eco-friendly, and climate stress resilient food production systems. In this paper, we discussed the foremost pathways of how climate change impacts our food production systems as well as the social, and economic factors that in the mastery of unbiased food distribution. Likewise, we analyze the research gaps and biases about climate change and food security. Climate change is often responsible for food insecurity issues, not focusing on the fact that food production systems have magnified the climate change process. Provided the critical threats to food security, the focus needs to be shifted to an implementation oriented-agenda to potentially cope with current challenges. Therefore, this review seeks to have a more unprejudiced view and thus interpret the fusion association between climate change and food security by imperatively scrutinizing all factors.

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Impacts of heat stress on global cattle production during the 21st century: a modelling study

Cited by 100 publications

References 29 publications

Rumen fermentative metabolomic and blood insights into the effect of yeast culture supplement on growing bulls under heat stress conditions

Rumen fermentative metabolomic and blood insights into the effect of yeast culture supplement on growing bulls under heat stress conditions

Influence of a sodium-saccharin sweetener on the rumen content and rumen epithelium microbiota in dairy cattle during heat stress

Uncovering the Research Gaps to Alleviate the Negative Impacts of Climate Change on Food Security: A Review

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