Density dependence maintains long-term stability despite increased isolation and inbreeding in the Florida Scrub-Jay.

Isolation caused by anthropogenic habitat fragmentation can destabilize populations. Populations relying on the inflow of immigrants can face reduced fitness due to inbreeding depression as fewer new individuals arrive. Empirical studies of the demographic consequences of isolation are critical to understand how populations persist through changing conditions.

Lifetime fitness benefits of breeding site fidelity and low costs of inbreeding permit inbreeding tolerance in an avian cooperative breeder.

Inbreeding, or breeding with close relatives, often decreases individual fitness, but mate choice in many species can increase inbreeding risk. Inbreeding is more likely in species with limited dispersal, such as cooperative breeders where non-parental individuals-often offspring from previous broods-provide parental care and frequently breed close to home. We leverage 32 years of data from a population of Florida Scrub-Jays ( ), an avian cooperative breeder, to investigate whether mate choice, and its lifetime fitness outcomes, affects inbreeding tolerance.

Allele frequency dynamics under sex-biased demography and sex-specific inheritance in a pedigreed jay population.

Sex-biased demography, including sex-biased survival or migration, can alter allele frequency changes across the genome. In particular, we can expect different patterns of genetic variation on autosomes and sex chromosomes due to sex-specific differences in life histories, as well as differences in effective population size, transmission modes, and the strength and mode of selection. Here, we demonstrate the role that sex differences in life history played in shaping short-term evolutionary dynamics across the genome.

Impacts of increasing isolation and environmental variation on Florida Scrub-Jay demography.

Isolation caused by anthropogenic habitat fragmentation can destabilize populations. Populations relying on the inflow of immigrants can face reduced fitness due to inbreeding depression as fewer new individuals arrive. Empirical studies of the demographic consequences of isolation are critical to understand how populations persist through changing conditions.

Hydrogen Bonding in Platinum Indolylphosphine Polyfluorido and Fluorido Complexes.

The reaction of the Pt complexes cis-[Pt(CH )(Ar){Ph P(Ind)} ] (Ind=2-(3-methyl)indolyl, Ar=4-tBuC H (1 a) 4-CH C H (1 b), Ph (1 c), 4-FC H (1 d), 4-ClC H (1 e), 4-CF C H (1 f)) with HF afforded the polyfluorido complexes trans-[Pt(F(HF) )(Ar){Ph P(Ind)} ] 2 a-f, which can be converted into the fluoride derivatives trans-[Pt(F)(Ar){Ph P(Ind)} ] (3 a-f) by treatment with CsF. The compounds 2 a-f and 3 a-f were characterised thoroughly by multinuclear NMR spectroscopy. The data reveal hydrogen bonding of the fluorido ligand with HF molecules and the indolylphosphine ligand.