Impacts of selective logging on haemosporidian infection and physiological correlates in tropical birds.
Avian haemosporidian
Blood parasite
Forest disturbance
Nutrition
Oxidative status
Selective logging
Journal
International journal for parasitology
ISSN: 1879-0135
Titre abrégé: Int J Parasitol
Pays: England
ID NLM: 0314024
Informations de publication
Date de publication:
01 2022
01 2022
Historique:
received:
20
05
2021
revised:
12
07
2021
accepted:
15
07
2021
pubmed:
28
8
2021
medline:
9
4
2022
entrez:
27
8
2021
Statut:
ppublish
Résumé
Tropical forest degradation affects host-parasite interactions, determining the probability of animals acquiring an infection. The activation of an immune response to fight off infections requires energy and other resources such as antioxidants which may be redirected from growth and reproduction. A key question is how selective logging-the most common form of tropical forest degradation-impacts the prevalence of avian haemosporidian infection and its correlated physiological responses (nutritional and oxidative status markers). We investigated the prevalence of Plasmodium, Haemoproteus, and Leucocytozoon parasites in 14 understorey bird species in lowland, logged and unlogged, old-growth forests of Borneo. Prevalences of infections were similar between selectively logged and unlogged forests. To explore nutritional and oxidative status effects of haemosporidian infections, we examined associations between infections and plasma proteins, plasma triglycerides, and multiple blood-based markers of oxidative status, testing for an impact of selective logging on those markers. Birds infected with Plasmodium showed higher levels of plasma proteins and non-enzymatic antioxidant capacity, and lower levels of plasma triglycerides and glutathione, compared with haemosporidian-free individuals. Conversely, birds infected with Haemoproteus showed no changes in nutritional or physiological markers compared with uninfected individuals. These results indicate higher metabolic and physiological costs of controlling Plasmodium infection, compared with Haemoproteus, possibly due to higher pathogenicity of Plasmodium. Selectively logged forests had no effect on the responses of birds to infection, suggesting that the environmental conditions of degraded forests do not appear to induce any appreciable physiological demands in parasitised birds.
Identifiants
pubmed: 34450133
pii: S0020-7519(21)00259-9
doi: 10.1016/j.ijpara.2021.07.003
pii:
doi:
Substances chimiques
Triglycerides
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
87-96Informations de copyright
Copyright © 2021 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.