With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine learning.In order to solve the prob...With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine learning.In order to solve the problems of privacy leakage,high computational overhead and high traffic in some federated learning schemes,this paper proposes amultiplicative double privacymask algorithm which is convenient for homomorphic addition aggregation.The combination of homomorphic encryption and secret sharing ensures that the server cannot compromise user privacy from the private gradient uploaded by the participants.At the same time,the proposed TQRR(Top-Q-Random-R)gradient selection algorithm is used to filter the gradient of encryption and upload efficiently,which reduces the computing overhead of 51.78%and the traffic of 64.87%on the premise of ensuring the accuracy of themodel,whichmakes the framework of privacy protection federated learning lighter to adapt to more miniaturized federated learning terminals.展开更多
Aims Animals in search of fleshy fruits forage mostly according to the number of available fruits and then select individual fruits based on reward quality or advertised subtle traits.This hierarchical pat-tern of fru...Aims Animals in search of fleshy fruits forage mostly according to the number of available fruits and then select individual fruits based on reward quality or advertised subtle traits.This hierarchical pat-tern of fruit choice would be translated into patterns of selection strength mediated by frugivores on fruit display traits.Thus,frugi-vores would exert higher selection pressures on fruit crop size and lower selection pressures on within-plant variation of phenotypic traits(infructescence,fruit and seed size).However,no attempt to link this behavioral mechanism of hierarchical trait selection to natural selection patterns has been made.Therefore,we sought to determine the relationship between the hierarchical decision-mak-ing process of fruit choice and patterns of natural selection on fruit traits.Methods We recorded bird visits and measured fruit-related traits(fruit crop size,fruit diameter and seed weight)in a natural population of Psychotria carthagenensis,a bird-dispersed treelet,in a Yungas for-est from Argentina.To assess phenotypic selection patterns on fruit display traits,we performed multivariate selection analysis,and to explicitly identify a hierarchy of fruit trait choice we used a classifi-cation tree as a predictive model.Important Findings Selection patterns on fruit display traits were in agreement with a hierarchical process of fruit choice made by birds.The strength of directional selection on the total number of fruits in a plant(i.e.fruit crop size)was nearly two times higher than on fruit size,and the classification tree analysis supported this hierarchical pattern.Our results support previous evidence that seed dispersers shape fruit crop size with higher intensity than subindividual fruit traits.Also,high levels of subindividual phenotypic variation of fruit display traits may be explained by relaxed selection pressures exerted by frugivores.Empirical studies also show that this pattern may consti-tute a general phenomenon among other plant-animal interactions.展开更多
Background Interactions between alien plants and insect herbivores in introduced ranges may determine their invasion success. However, few studies have investigated whether alien plants respond differently to native a...Background Interactions between alien plants and insect herbivores in introduced ranges may determine their invasion success. However, few studies have investigated whether alien plants respond differently to native and introduced herbivores in their introduced ranges and whether genotypes of alien plants matter. We conducted a green-house experiment to examine the effects of herbivory by a native insect(Spodoptera litura), by an introduced insect(S. frugiperda), and simultaneously by both insect species on growth, morphology, and biomass allocation of 17 genotypes of an invasive alien clonal plant Hydrocotyle verticillata, and used selection gradient analysis to test which herbivory conditions favor selection of a specific leaf or root trait value.Results Different genotypes of H. verticillata showed significant variation in growth, morphology, and biomass allocation, but their responses to herbivory were relatively consistent. All three herbivory treatments significantly decreased total mass and stolon mass, but herbivory of S. frugiperda increased specific leaf area. Herbivory of S. litura and simul-taneous herbivory of both insect species also decreased leaf mass, petiole mass, root mass, and ramet mass. Selection gradient analysis showed that leaf and root traits varied under different herbivory treatments. To achieve greater fitness, as measured by total mass and/or number of ramets, H. verticillata favored larger leaf area under herbivory by S. frugiperda, larger leaf area and lower specific leaf area under herbivory by S. litura, and larger leaf area, lower specific leaf area, and lower root-to-shoot ratio under simultaneous herbivory.Conclusions H. verticillata demonstrated contrasting responses to herbivory by native and introduced insects, showing a remarkable ability to coordinate leaf trait plasticity and optimize biomass allocation. This strategy allows H. verticillata to achieve greater fitness under various herbivory conditions, potentially contributing to its invasion success. These findings highlight the importance of plant–herbivore interactions in shaping invasion dynamics and underscore the complex adaptive mechanism that enables invasive plants to establish and spread in introduced ranges.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.62172436,62102452)the National Key Research and Development Program of China(2023YFB3106100,2021YFB3100100)the Natural Science Foundation of Shaanxi Province(2023-JC-YB-584).
文摘With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine learning.In order to solve the problems of privacy leakage,high computational overhead and high traffic in some federated learning schemes,this paper proposes amultiplicative double privacymask algorithm which is convenient for homomorphic addition aggregation.The combination of homomorphic encryption and secret sharing ensures that the server cannot compromise user privacy from the private gradient uploaded by the participants.At the same time,the proposed TQRR(Top-Q-Random-R)gradient selection algorithm is used to filter the gradient of encryption and upload efficiently,which reduces the computing overhead of 51.78%and the traffic of 64.87%on the premise of ensuring the accuracy of themodel,whichmakes the framework of privacy protection federated learning lighter to adapt to more miniaturized federated learning terminals.
基金Fundación Miguel Lillo and Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET),PIP 11420110100395 to M.O.
文摘Aims Animals in search of fleshy fruits forage mostly according to the number of available fruits and then select individual fruits based on reward quality or advertised subtle traits.This hierarchical pat-tern of fruit choice would be translated into patterns of selection strength mediated by frugivores on fruit display traits.Thus,frugi-vores would exert higher selection pressures on fruit crop size and lower selection pressures on within-plant variation of phenotypic traits(infructescence,fruit and seed size).However,no attempt to link this behavioral mechanism of hierarchical trait selection to natural selection patterns has been made.Therefore,we sought to determine the relationship between the hierarchical decision-mak-ing process of fruit choice and patterns of natural selection on fruit traits.Methods We recorded bird visits and measured fruit-related traits(fruit crop size,fruit diameter and seed weight)in a natural population of Psychotria carthagenensis,a bird-dispersed treelet,in a Yungas for-est from Argentina.To assess phenotypic selection patterns on fruit display traits,we performed multivariate selection analysis,and to explicitly identify a hierarchy of fruit trait choice we used a classifi-cation tree as a predictive model.Important Findings Selection patterns on fruit display traits were in agreement with a hierarchical process of fruit choice made by birds.The strength of directional selection on the total number of fruits in a plant(i.e.fruit crop size)was nearly two times higher than on fruit size,and the classification tree analysis supported this hierarchical pattern.Our results support previous evidence that seed dispersers shape fruit crop size with higher intensity than subindividual fruit traits.Also,high levels of subindividual phenotypic variation of fruit display traits may be explained by relaxed selection pressures exerted by frugivores.Empirical studies also show that this pattern may consti-tute a general phenomenon among other plant-animal interactions.
基金supported by the National Natural Science Foundation of China(Grant Nos.31500331,32071527).
文摘Background Interactions between alien plants and insect herbivores in introduced ranges may determine their invasion success. However, few studies have investigated whether alien plants respond differently to native and introduced herbivores in their introduced ranges and whether genotypes of alien plants matter. We conducted a green-house experiment to examine the effects of herbivory by a native insect(Spodoptera litura), by an introduced insect(S. frugiperda), and simultaneously by both insect species on growth, morphology, and biomass allocation of 17 genotypes of an invasive alien clonal plant Hydrocotyle verticillata, and used selection gradient analysis to test which herbivory conditions favor selection of a specific leaf or root trait value.Results Different genotypes of H. verticillata showed significant variation in growth, morphology, and biomass allocation, but their responses to herbivory were relatively consistent. All three herbivory treatments significantly decreased total mass and stolon mass, but herbivory of S. frugiperda increased specific leaf area. Herbivory of S. litura and simul-taneous herbivory of both insect species also decreased leaf mass, petiole mass, root mass, and ramet mass. Selection gradient analysis showed that leaf and root traits varied under different herbivory treatments. To achieve greater fitness, as measured by total mass and/or number of ramets, H. verticillata favored larger leaf area under herbivory by S. frugiperda, larger leaf area and lower specific leaf area under herbivory by S. litura, and larger leaf area, lower specific leaf area, and lower root-to-shoot ratio under simultaneous herbivory.Conclusions H. verticillata demonstrated contrasting responses to herbivory by native and introduced insects, showing a remarkable ability to coordinate leaf trait plasticity and optimize biomass allocation. This strategy allows H. verticillata to achieve greater fitness under various herbivory conditions, potentially contributing to its invasion success. These findings highlight the importance of plant–herbivore interactions in shaping invasion dynamics and underscore the complex adaptive mechanism that enables invasive plants to establish and spread in introduced ranges.
