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- W4366988145 abstract "Abstract Understanding processes that govern and sustain biological diversity is a central goal of community ecology. Unisexual complexes, where reproduction depends on sperm from males of one or more bisexual host species, are rare and the processes driving their diversity and structure remain poorly understood. Unisexual Ambystoma salamanders produce distinct biotypes (‘genomotypes’) depending on which bisexual species they ‘steal’ sperm from. This reproductive mode should generate distinct assemblages depending on the locally available bisexual host species. Yet, how availability and relative abundance of multiple bisexual hosts influences composition and diversity of natural unisexual assemblages at local or regional scales remains unknown. We hypothesize that host identity most directly drives local assemblage composition, with host variation associated with increased beta and gamma diversity within unisexuals. We collected genetic samples from Ambystoma salamanders across Pelee Island, Ontario, Canada (2015-2022). Two host species were identified (A. texanum and A. laterale) with nine sites having a single host and one site having both. Unisexual assemblages were grouped into four clusters by similarity, with host identity being a key determinant. Gamma diversity increased as a result of distinct host-specific assemblages forming at different sites on the island (i.e., high beta diversity). Assemblage composition, but not diversity, was correlated with relative host abundance, which may reflect matching niche requirements between host and unisexual forms they produce. Our results demonstrate that diversity and structure of unisexual assemblages are clearly shaped by their host(s) and such systems may serve as models for studying how biotic interactions shape ecological communities." @default.
- W4366988145 created "2023-04-27" @default.
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- W4366988145 date "2023-04-25" @default.
- W4366988145 modified "2023-09-27" @default.
- W4366988145 title "Diversity and composition of mixed-ploidy unisexual salamander assemblages reflect the key influence of host species" @default.
- W4366988145 doi "https://doi.org/10.21203/rs.3.rs-2706116/v1" @default.
- W4366988145 hasPublicationYear "2023" @default.
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