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Coevolution between Himalayan cuckoos and 2 sympatric Pycnonotidae hosts

Current Zoology 2021年第6期67卷 639-644页

作者： Canchao YANG Qihong LI Tongping SU Anders Pape MøLLER Wei LIANG Ministry of Education key laboratory for Ecology of tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou571158China key laboratory of Beibu Gulf Environment Change and Resources utilization of Ministry of Education Nanning Normal UniversityNanning530001China Ecologie Systématique Evolution UniversitéParis-SudCNRSAgroParisTechUniversitéParis-SaclayOrsay CedexF-91405France Ministry of Education key laboratory for Biodiversity Science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing100875China

Selection due to cuckoo parasitism is responsible for the evolution of anti-parasitism defenses in *** host species breeding sympatrically with a single parasitic cuckoo may evolve different strategies to reduce the risk of counter cuckoo parasitism,resulting in different interactions between cuckoos and hosts in areas of ***,we studied the coevolutionary interactions between Himalayan cuckoos Cuculus saturatus and 2 sympatric and closely related potential hosts belonging to the family Pycnonotidae,the brown-breasted bulbul Pycnonotus xanthorrhous and the collared finchbill Spizixos *** investigated parasitism rates and nest-site selection(nest height,nest cover,human disturbance,perch height,forest distance,and degree of concealment)related to parasitism risk,nest defense against a cuckoo dummy,and egg rejection against cuckoo model *** used specific nest sites that were further away from forests than those of finchbills,and they behaved more aggressively toward cuckoos than *** contrast,bulbuls possessed moderate egg rejection ability,whereas the finchbill rejected 100%of cuckoo model *** suggest that selection of a nest site away from forests by the bulbul explains the absence of parasitism by Himalayan *** suggest that these interspecific differences in nest-site selection and nest defense indicate alternative responses to selection due to cuckoos.

关键词： Cuculus saturatus distance to forest parasitism risk Pycnonotus xanthorrhous Spizixos semitorques

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Protective effects of C-phycocyanin on alcohol-induced acute liver injury in mice

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Chinese Journal of Oceanology and Limnology 2016年第2期34卷 399-404页

作者：夏冬刘冰栾希英孙军燕刘娜娜秦松杜振宁 School of Pharmacy Yantai University key laboratory of Coastal Biology and bioresource utilization Yantai institute of Coastal Zone Research Chinese Academy of Sciences School of Basic Medical Binzhou Medical University

Excessive alcohol consumption leads to liver disease. Extensive evidence suggests that C-phycocyanin(C-PC), a chromophore phycocyanobilin derived from Spirulina platensis, exerts protective eff ects against chemical-induced organ damage. In this study, we investigated whether C-PC could protect against ethanol-induced acute liver injury. Serum alanine aminotransferase(ALT), aspartate aminotransferase(AST), triglyceride(TG), total cholesterol(CHOL), low-density lipoprotein(LDL), liver homogenate malondialdehyde(MDA), superoxide dismutase(SOD) content were measured, and pathological examination of liver sections were examined. C-PC showed obvious inhibitory eff ects on serum ALT, AST, TG, CHOL, LDL and MDA, and SOD content significantly increased in the liver. The structure of hepatic lobules was clear, liver sinus returned to normal, and liver cell cords were arranged in neat rows. Cloudiness, swelling, inflammatory cell infiltration and spotty necrosis of liver cells were significantly reduced. Therefore, C-PC can significantly protect against ethanol-induced acute liver injury.

关键词： C-phycocyanin acute ethanol liver injury protective effect

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Nutrient-enhanced n-alkanes biodegradation and succession of bacterial communities

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Journal of Oceanology and Limnology 2018年第4期36卷 1294-1303页

作者： SUN Yanyu WANG Hui I LI Junde WANG Bin QI Cancan HU Xiaoke key laboratory of Coastal Biology and bioresource utilization Yantai Institute of Costal Zone Research Chinese Academy of Sciences Yantai 264003 China University of Chinese Academy of Sciences Beijing 100049 China

Bioremediation, is an effective and environment-friendly method of cleaning up crude oil pollution after an oil spill. However, the in situ bioremediation of crude oil is usually inhibited by deficiency of inorganic nutrients. To understand the effects of nutrient addition on the bioremediation of crude oil and the succession of bacterial communities during process of bioremediation, microcosms containing oilcontaminated sediments were constructed and biodegradation of crude oil was assessed based on the depletion of different ingredients. We used two culture-independent methods, denaturing gradient gel electrophoresis and a 16 S rRNA gene based clone library, to analyze the succession of bacterial communities. The results suggested n-alkanes were degraded after 30 days and that nutrient amendments significantly improved the efficiency of their biodegradation. Moreover, oil contamination and nutrient amendments could dramatically change bacterial community structures. Lower diversity was detected after being contaminated with oil. For instance, bacterial clones affiliated with the phylum Armatimonadetes, Firmicutes, Gemmatimonadetes, and Planctomycetes and the class Deltaproteobacteria and Epsilonproteobacteria could not be identified after 30 days of incubation with crude oil. However, "professional hydrocarbonocastic bacteria" became abundant in samples treated with oil during the bioremediation period, while these clones were almost completely absent from the control plots. Interestingly, bioinformatics analysis showed that even when dramatic differences in oil biodegradation efficiency were observed, bacterial communities in the plots with nutrient amendments were not significantly different from those in plots treated with oil alone. These findings indicated that nutrient amendments could stimulate the process of biodegradation but had less impact on bacterial communities. Overall, nutrient amendments might be able to stimulate the growth of n-alkane degrading

关键词： bioremediation nutrient-enhanced bacterial communities n-alkane

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Sediment bacterial communities are more complex in coastal shallow straits than in oceanic deep straits

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Journal of Oceanology and Limnology 2018年第5期36卷 1643-1654页

作者： LIU Hongmei WANG Bin HU Xiaoke School of Ocean Yantai UniversityYantai 264003China key laboratory of Coastal Biology and bioresource utilization Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China

Straits are ideal models to investigate the bacterial community assembly in complex hydrological environments. However, few studies have focused on bacterial communities in them. Here, comparable bacterial communities in costal shallow Bohai Strait(BS) and oceanic deep Fram Strait(FS) were studied. The Shannon and Chao1 indices were both higher in BS than in FS. The relative abundances of the classes Deltaproteobacteria and Bacilli and the family Halieaceae were higher in BS than in FS, in contrast to the families OM1_clade and JTB255_marine_benthic_group, revealing typical characteristics of bacterial communities in coastal and oceanic regions. Cluster analysis based on the Bray-Curtis index showed that samples were clustered by depth layer in FS and BS, indicating that structures of bacterial communities would diff er with increasing water depth in straits. Additionally, the cluster relationships among samples in abundant and rare communities were both similar to those in entire communities. However, the dissimilarities among samples showed a descending order as rare communities, entire communities and abundant communities. Network analysis indicated that the BS network was obviously more complex than the FS network. Filamentous bacteria Desulfobulbaceae exhibited high degree values in BS but not in FS, indicating key roles of Desulfobulbaceae in the BS. Our study provides different and common evidences for understanding microbial ecology in coastal shallow and oceanic deep straits.

关键词： bacterial communities Bohai Strait Fram Strait currents microbial ecological network

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A rhizobia strain isolated from root nodule of gymno-sperm Podocarpus macrophyllus

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Science China(Life Sciences) 2007年第2期50卷 228-233页

作者： HUANG BaoLing, LU ChengQun, WU Bo & FAN LiQin 1 Forestry College, Guangxi University, Nanning 530004, China 2 Guangxi key laboratory of Subtropical bioresource Conservation and utilization, Nanning 530004, China 1. Forestry College Guangxi University Nanning 530004 China 2. Guangxi key laboratory of Subtropical bioresource Conservation and utilization Nanning 530004 China

Symbiotic nitrogen fixation of rhizobia and leguminous plants is considered as the most important biologic nitrogen fixation system on earth. Symbiotic nodulation of gymnosperm Podocarpus macro-phyllus and rhizobia has never been reported. In this study, 11 endophytic bacteria strains were isolated from root nodules of P. macrophyllus and its variation P. macrophyllus var. maki. The plant infection tests on these strains indicated that the isolated strains could be nodulated on P. macrophyllus plants, and weak nitrogenase activity of nodules was found in acetylene reduction method. According to the physiological and biochemical characteristics of the 11 strains, GXLO 02 was selected as the representative strain. 16S rDNA full-length sequence analysis of GXLO 02 confirmed that the representative strain GXLO 02 belongs to Rhizobium sp.

关键词： Podocarpus macrophyllus P. macrophyllus var. maki rhizobia physiological and biochemical characteristics 16S rDNA sequence

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Responses of incubating females to female cuckoo calls in 2 hole-nesting bird species

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Current Zoology 2021年第5期67卷 565-567页

作者： Chao SHEN Jiangping YU Xudong LI Jing YUE Haitao WANG Wei LIANG Jilin Engineering laboratory for Avian Ecology and Conservation Genetics School of Life SciencesNortheast Normal UniversityChangchun130024China Jilin Provincial key laboratory of Animal Resource Conservation and utilization School of Life SciencesNortheast Normal UniversityChangchun130024China Ministry of Education key laboratory of Vegetation Ecology School of Life SciencesNortheast Normal UniversityChangchun130024China Ministry of Education key laboratory for Ecology of tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou571158China

Acoustic signals play an important role in animal communication systems,and these signals can transfer diverse and meaningful information from a signaler to a receiver(e.g.,Yu et al.2019).Animal signals tend to be honest;however,deception can occur when it is beneficial for receivers to send dishonest signals,such as by mimicking alarm calls to steal food from other individuals(Flower et al.2014).In birds,vocal mimicry is a widespread phenomenon that has 2 major functional explanation categories:intraspecific and interspecific communications(Dalziell et al.2015).Vocal mimicry in intraspecific communication mainly involves sexual selection and social affiliation(Dalziell et al.2015).In interspecific communication,studies on vocal mimicry are mostly related to predator–prey interactions(Dalziell et al.2015).Mimics could mimic calls of predators to scare off other predators or *** example,some species of hole-nesting birds produce a snakelike hissing call to drive nest predators away(e.g.,Dutour et al.2020).Receiver should be particularly sensitive to the deceptive vocals of mimics if failing to respond to an actual model sound is ***,the mimics could derive an advantage from mimicking the calls of predators of the receivers.A recent experimental study suggested that the bubbling calls of female common cuckoo Cuculus canorus mimic those of Eurasian sparrowhawk Accipiter nisus,and they primarily serve to distract regular hosts after laying eggs(York and Davies 2017).However,Xia et al.(2019)found that female cuckoo calls have other functions,including attracting mates and repelling rivals.

关键词： antipredator behavior cinereous tit "sparrowhawk-like"mimicry vocal mimicry yellow-rumped flycatcher

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Determining the level of extra-pair paternity in yellow-bellied prinias,a socially monogamous passerine

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Zoological Research 2021年第1期42卷 108-115页

作者： Zhi-Feng Ding Chun-Lan Zhang Wen-Sui Zhang Qian-Min Yuan Long-Wu Wang Gang Ren En Li Hui-Jian Hu Wei Liang Guangdong key laboratory of Animal Conservation and Resource utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouGuangdong 510260China State Forestry Administration of China key laboratory for Biodiversity Conservation in Mountainous Areas of Southwest Karst School of Life SciencesGuizhou Normal UniversityGuiyangGuizhou 550001China College of Life Sciences Anhui Normal UniversityWuhuAnhui 241000China Ministry of Education key laboratory for Ecology of tropical Islands College of Life SciencesHainan Normal UniversityHaikouHainan 571158China

DEAR EDITOR,Previous work based on molecular evidence has shown that most socially monogamous birds follow a genetic polyandrous mating ***,our knowledge about avian mating systems is heavily biased toward the north temperate zone,with data on tropical birds remaining relatively *** uneven distribution of both phylogenetic and spatial sampling has hampered our understanding and interpretation of *** this study,we investigated the frequency of extra-pair paternity(EPP)in a tropical population of yellow-bellied prinias(Prinia flaviventris)in Guangxi,southern China.A total of 129 individuals belonging to 24 nests were sampled,among which 12 out of 83 chicks(14.46%)in seven nests were found to be EPP *** nests in which all nestlings were sampled,only five out of 56 chicks were EPP offspring,accounting for an unbiased EPP rate of 8.93%.This rate is below the average rate of EPP in the family *** possible causes of EPP in prinias and the occurrence of EPP in birds with high resource investment and intensive parental care are *** study highlights the value of genome-wide markers in determining relatedness in a wild bird species without a reference genome.

关键词： EPP EDIT yellow

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Circadian Rhythm and Intersexual Differences in Auditory Frequency Sensitivity in Emei Music Frogs

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Asian Herpetological Research 2022年第1期13卷 43-52页

作者： Bicheng ZHU Xiaoqian SUN Haodi ZHANG Yezhong TANG Jianguo CUI CAS key laboratory of Mountain Ecological Restoration and bioresource utilization Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China

In anurans, calling behaviour is strongly seasonal and circadian. Previous studies have revealed that a uditory sensitivity in frogs exhibits seasonal plasticity, and electroencephalographic signals exhibit highly correlated circadian patterns;of which, the circadian rhythm remains unknown. In this study,the circadian rhythm and intersexual differences of auditory sensitivity were tested in the Emei music frog(Nidirana daunchina). This was achieved by comparing thresholds and latencies of auditory brainstem responses(ABRs) evoked by tones and clicks stimuli between male and female frogs during the day and at night,respectively. Our results revealed that both auditory thresholds and latencies had no differences between day and night except the la tencies in 3.5–4.0 kHz frequencies. However, the thresholds of tone pip evoked ABRs differed significantly between male and female frogs from 2.5 to 5.0 kHz. This demonstrated that the auditory sensitivity of Emei music frogs exhibits sexual dimorphism at high frequencies, with female frogs exhibiting greater auditory sensitivity than that of male frogs. Simultaneously, the power spectra of male advertisement calls are matched well with the frequency range of auditory sensitivity in male and female frogs,which supports the matched filter hypothesis. Our study enhances the understanding of circadian plasticity and sexual dimorphism of auditory sensitivity in frogs.

关键词： auditory brainstem response auditory plasticity day-night rhythm frog sexual auditory dimorphism the matched filter hypothesis

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A Dichocarpum-like Angiosperm from the Early Cretaceous of China

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 1-8页

作者： HAN Gang LIU Zhongjian WANG Xin hainan tropical Ocean University Sanya 572022 China Palaeontological Center Bohai University Jinzhou 121013 China Shenzhen key laboratory for Orchid Conservation and utilization National Orchid Conservation Center of China and Orchid Conservation ＆ Research Center of Shenzhen Shenzhen 518114 China State key laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology CAS Nanjing 210008 China

The Yixian Formation（the Early Cretaceous） of China has yielded a diverse group of early angiosperms, revealing the charm of angiosperms from the formation is far from finishing. Here we report a fossil angiosperm, Nothodichocarpum gen. et sp. nov, with physically connected female parts, male parts, branches, and leaves with pinnate reticulate venation from the Yixian Formation of Liaoning, China. In addition to the previous reports, this report underscores the diversity of angiosperms in the Early Cretaceous Yixian Formation and earlier origin of angiosperms. The morphological variations in the reproductive parts in different stages allow us to infer the development of this early angiosperm. This fossil plant demonstrates a unique character assemblage that sheds new light on the origin and evolution of carpels.

关键词： angiosperm Nothodichocarpum Early Cretaceous Liaoning Yixian Formation

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Latitudinal patterns of climatic variables and influence of local topography on climatic variables in the dry valleys of southwestern China

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Journal of Mountain Science 2022年第5期19卷 1348-1356页

作者： LI Xiao-juan LIU Xin ZHANG Han-yue BAO Wei-kai CAS key laboratory of Mountain Ecological Restoration and bioresource utilization&Ecological Restoration and Biodiversity Conservation key laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China

Climate is a key factor to determine the pattern of ecosystems;however,the latitudinal patterns of climatic variables in the arid and semiarid areas remain largely unclear when compared to humid *** topography of the dry valleys of southwestern China plays an important role in the formation of ***,its impact on the climate remains *** this study,eight climatic variables from 12 meteorological stations were analyzed to explore their latitudinal patterns in the wet and dry seasons from 1961 to *** also quantified the effects of local topography(RH10)on the climatic *** results were as follows:sunshine duration,total solar radiation,average temperature,and evaporation decreased significantly,and wind speed increased significantly with increasing latitude in the annual,wet,and dry seasons(P<0.001).Relative humidity and precipitation decreased significantly with increasing latitude in the wet season(P<0.001),and no obvious change pattern was observed in the dry *** index significantly decreased(toward dryness)with increasing latitude in the wet season and increased in the dry season(P<0.001).Wind speed had a significantly positive relationship with topography(RH10)(P<0.01),whereas precipitation and aridity index were negatively associated with topography in the wet season and positively associated with topography in the dry *** was positively associated with RH10 in the wet season,and negatively in the dry *** results of our research could provide new perspectives for understanding the relationship between topography and drought in the dry valleys of southwestern China.

关键词： Latitudinal patterns Wet season Dry season Aridity index Local topography

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