DNA metabarcoding unveils the effects of habitat fragmentation on pollinator diversity, plant-pollinator interactions, and pollination efficiency in Maldive islands.
DNA barcoding
ecosystem services
habitat degradation
pollen DNA metabarcoding
pollinator foraging
species interactions
Journal
Molecular ecology
ISSN: 1365-294X
Titre abrégé: Mol Ecol
Pays: England
ID NLM: 9214478
Informations de publication
Date de publication:
Dec 2023
Dec 2023
Historique:
revised:
26
04
2022
received:
30
11
2021
accepted:
05
05
2022
medline:
27
11
2023
pubmed:
3
6
2022
entrez:
2
6
2022
Statut:
ppublish
Résumé
Habitat fragmentation affects biodiversity, but with unclear effects on pollinators and their interactions with plants in anthropized landscapes. Islands could serve as open air laboratories, suitable to disentangle how land-use alteration impacts pollination ecology. In Maldive islands we investigated how pollinator richness, plant-pollinator interactions and pollination efficiency are influenced by the green area fragmentation (i.e., gardens and semi-natural patches). Moreover, we considered the mediating role of pollinator body size and the plant trait of being invasive in shaping interactions. To do this, we surveyed pollinator insects from 11 islands representing a gradient of green area fragmentation. A DNA metabarcoding approach was adopted to identify the pollen transported by pollinators and characterize the plant-pollinator interactions. We found that intermediate levels of green area fragmentation characterized pollinator communities and increased their species richness, while decreasing interaction network complexity. Invasive plants were more frequently found on pollinator bodies than native or exotic noninvasive ones, indicating a concerningly higher potential for pollen dispersal and reproduction of the former ones. Intriguingly, pollinator body size mediated the effect of landscape alteration on interactions, as only the largest bees expanded the foraging diet in terms of plant richness in the transported pollen at increasing fragmentation. In parallel, the pollination efficiency increased with pollinator species richness in two sentinel plants. This study shows that moderate landscape fragmentation of green areas shapes many aspects of the pollination ecosystem service, where despite interactions being less complex and mediated by pollinator body size, pollinator insect biodiversity and potential plant reproduction are supported.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
6394-6404Subventions
Organisme : Ministero dell'Università e della Ricerca
ID : PONRI FSE REACT-EU 2014-2020 - "Azione IV.4 -
Organisme : "Azione IV.4-: Dottorati e contratti di ricerca su tematiche dell'innovazione, Azione IV.6 Contratti di ricerca su tematiche Green"
Informations de copyright
© 2022 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.
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