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A GIS aided study of agriculture and landscape in Midland England
- 负责人：
- Arts And Humanities Research Council (AHRC);;University Of East Anglia;;Northamptonshire County Council;;Rockingham Forest Trust
- 关键词：
- HEDGE AGRICULTURE AND SUBSISTENCE Archaeology BUILDING COPPICE Common Copse DOMESTIC ENCLOSURE FOREST
- DOI：
- doi:10.5284/1000151
- 摘要：
- A study of the Midland landscape from prehistoric times to the nineteenth century, using digital mapping and GIS to investigate the relationship bet
Data from: Sex in an uncertain world: environmental stochasticity helps restore competitive balance between sexually and asexually reproducing
- 负责人：
- DOI：
- doi:10.5061/dryad.vk25n
- 摘要：
- diapause). Given the well-known two-fold cost of sex, this begs the question of how sexually reproducing individuals are able to co-exist with their asexual
Data from: Alternative intrapopulation life history strategies and their trade-offs in an African annual fish
- 负责人：
- DOI：
- doi:10.5061/dryad.5km28
- 摘要：
- ), representing alternative niches. The unpredictable conditions led to the evolution of reproductive bet-hedging with asynchronous embryonic development. We use
Data from: Courting disaster: how diversification rate affects fitness under risk
- 负责人：
- 关键词：
- DOI：
- doi:10.5061/dryad.370rv
- 摘要：
- Life is full of risk. To deal with this uncertainty, many organisms have evolved bet-hedging strategies that spread risk through phenotypic
Data from: Assessing the influence of temporal autocorrelations on the population dynamics of a disturbance specialist plant population in a random environment
- 负责人：
- DOI：
- doi:10.5061/dryad.bq340
- 摘要：
- Biological populations are strongly influenced by random variations in their environment, which are often autocorrelated in time. For disturbance
Data from: Adaptation to temporally fluctuating environments by the evolution of maternal effects
- 负责人：
- DOI：
- doi:10.5061/dryad.56bb4
- 摘要：
- -offspring generations. In contrast, randomizing maternal effects (i.e., diversifying and conservative bet-hedging), are expected to evolve in response
Data from: Morphological variability in propagules of a desert annual as a function of rainfall patterns at different temporal and spatial scales
- 负责人：
- DOI：
- doi:10.5061/dryad.qj5ck
- 摘要：
- ciated to rainfall unpredictability, a trait often interpreted as a bet-hedging strategy. Our study provides empirical evidence of an integrated strategy that allows
Data from: Spontaneous nongenetic variation of group size creates cheater-free groups of social microbes
- 负责人：
- DOI：
- doi:10.5061/dryad.77hk7
- 摘要：
- In social organisms, cheaters that gain a fitness advantage by defecting from the costs of cooperation reduce the average level of cooperation in a population. Such “cheating load” can be severe enough to cause local extinction events when cooperation is necessary for survival, but can also mediate group-level selection against cheaters across spatially structured groups that vary in cheater frequency. In cheater-laden populations, such variation could be generated by the formation of new homogeneous groups by small numbers of identical cells. Here we use the model social bacterium Myxococcus xanthus to test whether population bottlenecks inherent to the starvation-induced formation of multicellular fruiting bodies can generate cheater-free groups within an initially cheater-laden population. We first show that genetically identical fruiting bodies vary greatly in their numbers of stress-resistant spores. We further show mathematically and experimentally that this variation can include small cheater-free groups. Such non-genetic variation in group size was found to occur in a variety of M. xanthus isolates and Myxococcus species. Our results suggest that stress-induced reductions in group size may serve as a general process that repeatedly purges genetic diversity from a minority of social groups, thus recurrently generating high-relatedness social environments unburdened by cheating load.
Data from: Collective behavior and colony persistence of social spiders depends on their physical environment
- 负责人：
- Kamath, Ambika
- DOI：
- doi:10.5061/dryad.3dt11m7
- 摘要：
- of social spiders, and suggest multiple possible proximate and ultimate mechanisms—including variation in web complexity, dispersal behavior, and bet-hedging
Data from: Embryonal life histories: desiccation plasticity and diapause in the Argentinean pearlfish Austrolebias bellottii
- 负责人：
- DOI：
- doi:10.5061/dryad.8540192
- 摘要：
- . In agreement with expectations for the presence of diversified bet-hedging, some embryos hatched and others not in over half of the clutches with seve
