Artificial intelligence and its application in grassland monitoring and restoration

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 445 - 478

Published: Dec. 4, 2024

Language: Английский

Habitat-induced changes in forage quality and implications for fitness in Plateau Pika (Ochotona curzoniae)

Journal of Mammalogy, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 19, 2024

Abstract Plateau pikas (Ochotona curzoniae) play a keystone role in the alpine meadow ecosystem on Qinghai–Tibetan (QTP). For decades, QTP grasslands have become degraded to some degree, largely as result of heavy livestock grazing. Concomitantly, abundance plateau has increased dramatically grassland degradation altered vegetation community structure and dominant species, shifting plant nutrient contents toward higher protein conditions that favor them. Considerable research supports hypothesis quantity quality food limit herbivore populations. Here, we examined relationship between availability essential amino acids diets degree associated with grazing intensity through field survey, well fitness individuals by laboratory feeding experiments 2 pelleted chows containing 0.26% 0.45% methionine. Sulfur-containing methionine cystine were most limiting pikas. During pika breeding season, concentrations acids, particularly cystine, heavily meadows than lightly moderately meadows. Individuals fed exhibited enhanced cell-mediated immunity, reduced coccidian infection, gonadotropin-releasing hormone, luteinizing estradiol, progesterone, testosterone compared those These results showed provided relatively high-quality improved individual fitness, suggesting high-methionine may be key factor generation maintenance high-density populations

Language: Английский

Alpine meadow degradation: status, reasons, and trends

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 69 - 86

Published: Dec. 4, 2024

Language: Английский