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Low host specificity and broad geographical ranges in a community of parasitic non‐pollinating fig wasps (Sycoryctinae; Chalcidoidea)
- Source :
- Journal of Animal Ecology, Journal of Animal Ecology, 2021, 90 (7), pp.1678-1690. ⟨10.1111/1365-2656.13483⟩, Journal of Animal Ecology, Wiley, 2021, 90 (7), pp.1678-1690. ⟨10.1111/1365-2656.13483⟩
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Plants, phytophagous insects and their parasitoids form the most diverse assemblages of macroscopic organisms on earth. Enclosed assemblages in particular represent a tractable system for studying community assembly and diversification. Communities associated with widespread plant species are especially suitable as they facilitate a comparative approach. Pantropical fig-wasp communities represent a remarkably well-replicated system, ideal for studying these historical processes. We expect high dispersal ability in non-pollinating fig wasps to result in lower geographical turnover in comparison to pollinating fig wasps. The ability of non-pollinating wasps to utilise a number of hosts (low host specificity) is a key determinant of overall geographical range, with intraspecific competition becoming a constraining factor should diet breadth overlap among species. Finally, we expect conserved community structure throughout the host range. We aim to test these expectations, derived from population genetic and community studies, using the multi-trophic insect community associated with Ficus hirta throughout its 3,500 km range across continental and insular Asia. We collect molecular evidence from one coding mitochondrial gene, one non-coding nuclear gene and multiple microsatellites across 25 geographical sites. Using these data, we establish species boundaries, determine levels of host specificity among non-pollinating fig wasps and quantify geographical variation in community composition. We find low host specificity in two genera of non-pollinating fig wasps. Functional community structure is largely conserved across the range of the host fig, despite limited correspondence between the ranges of non-pollinator and pollinator species. While nine pollinators are associated with Ficus hirta, the two non-pollinator tribes developing in its figs each contained only four species. Contrary to predictions, we find stronger isolation by distance in non-pollinators than pollinators. Long-lived non-pollinators may disperse more gradually and be less reliant on infrequent long-distance dispersal by wind currents. Segregation among non-pollinating species across their range is suggestive of competitive exclusion and we propose that this may be a result of increased levels of local adaptation and moderate, but regular, rates of dispersal. Our findings provide one more example of lack of strict codiversification in the geographical diversification of plant-associated insect communities.
- Subjects :
- 0106 biological sciences
Range (biology)
mutualism
Wasps
Population
Biology
010603 evolutionary biology
01 natural sciences
Host Specificity
Parasitoid
Pollinator
Animals
Parasites
Pollination
Symbiosis
education
parasitoid
Phylogeny
Ecology, Evolution, Behavior and Systematics
Local adaptation
Isolation by distance
Mutualism (biology)
education.field_of_study
[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE]
Ecology
010604 marine biology & hydrobiology
Beta-diversity
population genetics
15. Life on land
Ficus
biology.organism_classification
[SDV.GEN.GA]Life Sciences [q-bio]/Genetics/Animal genetics
Biological dispersal
community assembly
Animal Science and Zoology
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Subjects
Details
- Language :
- English
- ISSN :
- 00218790 and 13652656
- Database :
- OpenAIRE
- Journal :
- Journal of Animal Ecology, Journal of Animal Ecology, 2021, 90 (7), pp.1678-1690. ⟨10.1111/1365-2656.13483⟩, Journal of Animal Ecology, Wiley, 2021, 90 (7), pp.1678-1690. ⟨10.1111/1365-2656.13483⟩
- Accession number :
- edsair.doi.dedup.....c6132661ca02507badcd4b0ec4f9b39a