How Nutrients Mediate the Impacts of Global Change on Locust Outbreaks.
Annu Rev Entomol
; 69: 527-550, 2024 Jan 25.
Article
em En
| MEDLINE
| ID: mdl-38270985
ABSTRACT
Locusts are grasshoppers that can migrate en masse and devastate food security. Plant nutrient content is a key variable influencing population dynamics, but the relationship is not straightforward. For an herbivore, plant quality depends not only on the balance of nutrients and antinutrients in plant tissues, which is influenced by land use and climate change, but also on the nutritional state and demands of the herbivore, as well as its capacity to extract nutrients from host plants. In contrast to the concept of a positive relationship between nitrogen or protein concentration and herbivore performance, a five-decade review of lab and field studies indicates that equating plant N to plant quality is misleading because grasshoppers respond negatively or neutrally to increasing plant N just as often as they respond positively. For locusts specifically, low-N environments are actually beneficial because they supply high energy rates that support migration. Therefore, intensive land use, such as continuous grazing or cropping, and elevated ambient CO2 levels that decrease the proteincarbohydrate ratios of plants are predicted to broadly promote locust outbreaks.
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1
Base de dados:
MEDLINE
Assunto principal:
Gafanhotos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article